9.9D, 15D Owner's Manual - Yamaha Motor Company · 15D OWNER’S MANUAL LIT-18626-05-82 ... maximum...

9.9D15D

OWNER’S MANUAL

LIT-18626-05-8263V-28199-17

April 2004–0.3 × 1 CRPrinted in Japan

Printed on recycled paper

YAMAHA MOTOR CORPORATION, USA U.S.A.Edition

ZMU01690

Read this owner’s manual carefully before operating your outboard motor.

Important manual informationEMU25100

To the ownerThank you for choosing a Yamaha outboardmotor. This Owner’s Manual contains infor-mation needed for proper operation, mainte-nance and care. A thorough understanding ofthese simple instructions will help you obtainmaximum enjoyment from your new Yamaha.If you have any question about the operationor maintenance of your outboard motor,please consult a Yamaha dealer.In this Owner’s Manual particularly importantinformation is distinguished in the followingways.

The Safety Alert Symbol means AT-TENTION! BECOME ALERT! YOUR SAFE-TY IS INVOLVED!

WARNINGEWM00780

Failure to follow WARNING instructionscould result in severe injury or death to themachine operator, a bystander, or a per-son inspecting or repairing the outboardmotor.

CAUTION:ECM00700

A CAUTION indicates special precautionsthat must be taken to avoid damage to theoutboard motor.

NOTE:A NOTE provides key information to makeprocedures easier or clearer.

Yamaha continually seeks advancements inproduct design and quality. Therefore, whilethis manual contains the most current productinformation available at the time of printing,there may be minor discrepancies between

your machine and this manual. If there is anyquestion concerning this manual, please con-sult your Yamaha dealer.

NOTE:The 9.9MH, 15MH and the standard accesso-ries are used as a base for the explanationsand illustrations in this manual. Thereforesome items may not apply to every model.

EMU25110

9.9D, 15DOWNER’S MANUAL

©2004 by Yamaha Motor Corporation, USA

1st edition, February 2004All rights reserved.

Any reprinting or unauthorized usewithout the written permission ofYamaha Motor Corporation, USA

is expressly prohibited.Printed in Japan

P/N LIT-18626-05-82

U63V17E0.book Page 1 Thursday, February 26, 2004 11:52 AM

Table of contents

General information ......................1Identification numbers record...... 1

Outboard motor serial number ....... 1Emission control information ....... 1

North American models.................. 1Safety information ....................... 2Important labels........................... 3

Warning labels................................ 3Basic boating rules

(Rules of the road) ................... 3Steering and sailing rules and

sound signals .............................. 3Rules when encountering

vessels ........................................ 4Other special situations .................. 5

Fueling instructions ..................... 7Gasoline ......................................... 8Engine oil........................................ 8

Propeller selection....................... 8Start-in-gear protection ............... 9

Basic components ......................10Main components...................... 10

Fuel tank....................................... 10Fuel joint....................................... 11Fuel gauge ................................... 11Fuel tank cap................................ 11Air vent screw............................... 11Tiller handle.................................. 11Gear shift lever ............................. 11Throttle grip .................................. 11Throttle indicator........................... 12Throttle friction adjuster................ 12Engine stop lanyard switch........... 12Engine stop button ....................... 13Choke knob .................................. 13Manual starter handle................... 13Steering friction adjuster............... 13Trim rod (tilt pin) ........................... 14Tilt lock mechanism...................... 14Tilt support bar ............................. 14Top cowling lock lever(s)

(turn type).................................. 14

Carrying handle ............................ 15

Operation ..................................... 16Installation................................. 16

Mounting the outboard motor ....... 16Clamping the outboard motor ....... 17

Breaking in engine .................... 18Gasoline and engine oil mixing

chart (25:1)................................ 18Procedure for pre-mixed

models ...................................... 18Preoperation checks ................. 19

Fuel .............................................. 19Oil ................................................. 19Controls ........................................ 19Engine .......................................... 19

Filling fuel and engine oil .......... 19Filling fuel for portable tank .......... 19Ring Free Fuel Additive................ 19Gasoline and oil mixing (100:1) .... 20

Operating engine ...................... 21Feeding fuel (portable tank) ......... 21Starting engine ............................. 22

Warming up engine................... 23Choke start models ...................... 23

Shifting ...................................... 24Forward (tiller handle and

remote control models) ............. 24Reverse (manual tilt and

hydro tilt models)....................... 24Stopping engine........................ 25

Procedure..................................... 25Trimming outboard motor.......... 26

Adjusting trim angle for manual tilt models ..................... 26

Adjusting boat trim........................ 27Tilting up and down................... 28

Procedure for tilting up (manual tilt models)................... 28

Procedure for tilting down (manual tilt models)................... 29

Cruising in shallow water .......... 29Cruising in shallow water

(manual tilt models)................... 29


Table of contents

Cruising in other conditions....... 31

Maintenance.................................32Specifications ............................ 32Transporting and storing

outboard motor....................... 32Clamp screw mounting models .... 33Storing outboard motor................. 33Procedure..................................... 33Lubrication

(except oil injection models)...... 35Cleaning and anticorrosion

measures .................................. 35Cleaning the outboard motor........ 35Checking painted surface of

motor......................................... 35Periodic maintenance................ 35

Replacement parts ....................... 35Maintenance chart........................ 36Greasing....................................... 37Cleaning and adjusting

spark plug ................................. 37Checking fuel system ................... 38Inspecting fuel filter ...................... 39Cleaning fuel filter......................... 39Inspecting idling speed................. 39Checking wiring and

connectors ................................ 40Exhaust leakage........................... 40Water leakage .............................. 40Checking propeller ....................... 40Removing the propeller ................ 41Installing the propeller .................. 41Changing gear oil ......................... 42Cleaning fuel tank......................... 43Inspecting and replacing

anode(s).................................... 43Checking top cowling ................... 44Coating the boat bottom............... 44

Trouble Recovery........................45Troubleshooting ........................ 45Temporary action in

emergency ............................. 48

Impact damage............................. 48Starter will not operate ................. 48Emergency starting engine........... 49

Treatment of submerged motor...................................... 50Procedure..................................... 50

Consumer information ............... 51Important warranty information

for U.S.A. and Canada........... 51YAMAHA MOTOR

CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY .......................... 53

IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE U.S.A. OR CANADA .............. 56


General information

1

EMU25170

Identification numbers recordEMU25182

Outboard motor serial numberThe outboard motor serial number is stampedon the label attached to the port side of theclamp bracket or the upper part of the swivelbracket.Record your outboard motor serial number inthe spaces provided to assist you in orderingspare parts from your Yamaha dealer or forreference in case your outboard motor is sto-len.

EMU25220

Emission control informationEMU25230

North American modelsThis engine conforms to U.S. EnvironmentalProtection Agency (EPA) regulations for ma-rine SI engines. See the label affixed to yourengine for details.

EMU30390

Approval label of emission control certifi-cateThis label is attached to the bottom cowling.Existing Technology; N/A

EMU25261

Manufactured date labelThis label is attached to the clamp bracket orthe swivel bracket.

1. Outboard motor serial number location

1. Approval label location

1. Manufactured date label location

EMISSION CONTROL INFORMATIONENGINE FAMILY : THIS ENGINE CONFORMS TO 2001 U.S. EPA REGULATIONS FOR MARINE SI ENGINES.REFER TO THE OWNERS MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.FELs :SPARK PLUG :DISPLACEMENT :ADVERTISED POWER :

IDLE SPEED :SPARK PLUG GAP (mm) :FUEL : GASOLINEVALVE LASH (mm) : IN EX

cmkw

g/kw-hr rpm IN NEUTRAL

3

ZMU04304


General information

2

EMU25361

Safety information� Before mounting or operating the outboard

motor, read this entire manual. Reading itshould give you an understanding of themotor and its operation.

� Before operating the boat, read any own-er’s or operator’s manuals supplied with itand all labels. Be sure you understand eachitem before operating.

� Do not overpower the boat with this out-board motor. Overpowering the boat couldresult in loss of control. The rated power ofthe outboard should be equal to or less thanthe rated horsepower capacity of the boat.If the rated horsepower capacity of the boatis unknown, consult the dealer or boat man-ufacturer.

� Do not modify the outboard. Modificationscould make the motor unfit or unsafe to use.

� Never operate after drinking alcohol or tak-ing drugs. About 50% of all boating fatalitiesinvolve intoxication.

� Have an approved personal flotation device(PFD) on board for every occupant. It is agood idea to wear a PFD whenever boat-ing. At a minimum, children and non-swim-mers should always wear PFDs, and

everyone should wear PFDs when thereare potentially hazardous boating condi-tions.

� Gasoline is highly flammable, and its va-pors are flammable and explosive. Handleand store gasoline carefully. Make surethere are no gas fumes or leaking fuel be-fore starting the engine.

� This product emits exhaust gases whichcontain carbon monoxide, a colorless,odorless gas which may cause brain dam-age or death when inhaled. Symptoms in-clude nausea, dizziness, and drowsiness.Keep cockpit and cabin areas well ventilat-ed. Avoid blocking exhaust outlets.

� Check throttle, shift, and steering for properoperation before starting the engine.

� Attach the engine stop switch lanyard cordto a secure place on your clothing, or yourarm or leg while operating. If you acciden-tally leave the helm, the cord will pull fromthe switch, stopping the engine.

� Know the marine laws and regulationswhere you will be boating—and obey them.For basic boating rules, see “Rules of theroad” on page 3.

� Stay informed about the weather. Checkweather forecasts before boating. Avoidboating in hazardous weather.

� Tell someone where you are going: leave aFloat Plan with a responsible person. Besure to cancel the Float Plan when you re-turn.

� Use common sense and good judgmentwhen boating. Know your abilities, and besure you understand how your boat han-dles under the different boating conditionsyou may encounter. Operate within yourlimits, and the limits of your boat. Alwaysoperate at safe speeds, and keep a carefulwatch for obstacles and other traffic.

Manufactured:

ZMU04346


General information

3

� Always watch carefully for swimmers duringthe engine operation.

� Stay away from swimming areas.� When a swimmer is in the water near you

shift into neutral and shut off the engine.Be informed about boating safety. Additionalpublications and information can be obtainedfrom many organizations, including the follow-ing:United States Coast GuardConsumer Affairs Staff (G-BC) Office of Boating, Public, and Consumer Af-fairs U.S. Coast Guard Headquarters Washington, D.C. 20593-0001 Boating Safety Hotline: 1-800-368-5647National Marine Manufacturers Associa-tion (NMMA)401 N. Michigan Ave. Chicago, Il 60611Marine Retailers Association of America155 N. Michigan Ave. Chicago, Il 60601EMU25380

Important labelsEMU25395

Warning labels

EMU25401

Label

WARNINGEWM01260

� Be sure shift control is in neutral beforestarting engine. (except 2HP)

� Do not touch or remove electrical partswhen starting or during operation.

� Keep hands, hair, and clothes away fromflywheel and other rotating parts whileengine is running.

EMU25431

Label

WARNINGEWM01300

� This engine is equipped with a neutralstarting device.

� The engine will not start unless the shiftcontrol is in neutral position.

EMU25500

Basic boating rules (Rules of the road)

Just as there are rules which apply when youare driving on streets and high ways, thereare waterway rules which apply when you aredriving your boat. These rules are used inter-nationally, and are also enforced by the Unit-ed States Coast Guard and local agencies.You should be aware of these rules, and fol-low them whenever you encounter anothervessel on the water.Several sets of rules prevail according to geo-graphic location, but are all basically the sameas the International Rules of the Road. Therules presented here in your Owner’s Manualare condensed, and have been provided foryour convenience only. Consult your localU.S. Coast Guard Auxiliary or Department ofMotor Vehicles for a complete set of rulesgoverning the waters in which you will be us-ing your boat.EMU25510

Steering and sailing rules and sound signalsWhenever two vessels on the water meet oneanother, one vessel has the right-of-way; it iscalled the “stand-on” vessel. The vessel


General information

4

which does not have the right-of-way is calledthe “give-way” or “burdened” vessel. Theserules determine which vessel has the right-of-way, and what each vessel should do.Stand-on vesselThe vessel with the right-of-way has the dutyto continue its course and speed, except toavoid an immediate collision. When you main-tain your direction and speed, the other vesselwill be able to determine how best to avoidyou.Give-way vesselThe vessel which does not have the right-of-way has the duty to take positive and timelyaction to stay out of the way of the Stand-Onvessel. Normally, you should not cross in frontof the vessel with the right-of-way. You shouldslow down or change directions briefly andpass behind the other vessel. You should al-ways move in such a way that the operator ofthe other vessel can see what you are doing.“The general prudential rule”This rule is called Rule 2 in the InternationalRules and says,“In obeying and construing these rules due re-gard shall be had to all dangers of navigationand collision, and to any special circumstanc-es, which may render a departure from theabove rules necessary in order to avoid im-mediate danger.”In other words, follow the standard rules ex-cept when a collision will occur unless bothvessels try to avoid each other. If that is thecase, both vessels become “Give-Way” ves-sels.EMU25520

Rules when encountering vesselsThere are three main situations which youmay encounter with other vessels which couldlead to a collision unless the Steering Rulesare followed:

Meeting: (you are approaching another ves-sel head-on)Crossing: (you are traveling across the othervessel’s path)Overtaking: (you are passing or beingpassed by another vessel)In the following illustration, your boat is in thecenter. You should give the right-of-way toany vessels shown in white area (you are theGive-Way vessel). Any vessels in the shadedarea must yield to you (they are the Give-Wayvessels). Both you and the meeting vesselmust alter course to avoid each other.

MeetingIf you are meeting another power vessel headon, and are close enough to run the risk of col-lision, neither of you has the right-of-way!Both of you should alter course to avoid an ac-cident. You should keep the other vessel onyour port (left) side. This rule doesn’t apply ifboth of you will clear one another if you con-tinue on your set course and speed.


General information

5

CrossingWhen two power driven vessels are crossingeach other’s path close enough to run the riskof collision, the vessel which has the other onthe starboard (right) side must keep out of theway of the other. If the other vessel is on yourright, you must keep out of its way; you are theGive-Way vessel. If the other vessel is onyour port (left) side, remember that youshould maintain course and direction, provid-ed the other vessel gives you the right-of-wayas it should.

OvertakingIf you are passing another vessel, you are the“Give-Way” vessel. This means that the othervessel is expected to maintain its course andspeed. You must stay out of its way until youare clear of it. Likewise, if another vessel ispassing you, you should maintain your speedand direction so that the other vessel cansteer itself around you.

EMU25530

Other special situationsThere are three other rules you should beaware of when driving your boat around othervessels.Narrow channels and bendsWhen navigating in narrow channels, youshould keep to the right when it is safe andpractical to do so. If the operator of a power-driven vessel is preparing to go around abend that may obstruct the view of other watervessels, the operator should sound a pro-longed blast on the whistle (4 to 6 seconds). Ifanother vessel is around the bend, it tooshould sound the whistle. Even if no reply isheard, however, the vessel should still pro-ceed around the bend with caution. If you nav-igate such waters with your boat, you willneed to carry a portable air horn, availablefrom local marine supply stores.Fishing vessel right-of-wayAll vessels which are fishing with nets, lines ortrawls are considered to be “fishing vessels”under the International Rules. Vessels withtrolling lines are not considered fishing ves-sels. Fishing vessels have the right-of-way re-gardless of position. Fishing vessels cannot,however, impede the passage of other ves-sels in narrow channels.Sailing vessel right-of-waySailing vessels should normally be given theright-of-way. The exceptions to this are:1. When the sailing vessel is overtaking the

power-driven vessel, the power-drivenvessel has the right-of-way.

2. Sailing vessels should keep clear of anyfishing vessel.

3. In a narrow channel, a sailing vesselshould not hamper the safe passage of apower-driven vessel which can navigateonly in such a channel.


General information

6

Reading buoys and other markersThe waters of the United states are markedfor safe navigation by the lateral system ofbuoyage. Simply put, buoys and markershave an arrangement of shapes, colors, num-bers and lights to show which side of the buoya boater should pass on when navigating in aparticular direction. The markings on thesebuoys are oriented from the perspective of be-ing entered from seaward (the boater is goingtowards the port). This means that red buoysare passed on the starboard (right) side whenproceeding from open water into port, andblack buoys are to port (left) side. When navi-gating out of port, your position with respect tothe buoys should be reversed; red buoysshould be to port and black buoys to star-board.Many bodies of water used by boaters are en-tirely within the boundaries of a particularstate. The Uniform State Waterway MarkingSystem has been devised for these waters.This system uses buoys and signs with dis-tinctive shapes and colors to show regulatoryor advisory information. These markers arewhite with black letters and orange boarders.They signify speed zones, restricted areas,danger areas, and general information.Remember, markings may vary by geograph-ic location. Always consult local boating au-thorities before driving your boat in unfamiliarwaters.


General information

7

EMU25540

Fueling instructions

WARNINGEWM00010

GASOLINE AND ITS VAPORS ARE HIGH-LY FLAMMABLE AND EXPLOSIVE!

� Do not smoke when refueling, and keepaway from sparks, flames, or othersources of ignition.

� Stop engine before refueling.� Refuel in a well-ventilated area. Refuel

portable fuel tanks off the boat.

ZMU01708


General information

8

� Take care not to spill gasoline. If gaso-line spills, wipe it up immediately withdry rags.

� Do not overfill the fuel tank.� Tighten the filler cap securely after refu-

eling.� If you should swallow some gasoline, in-

hale a lot of gasoline vapor, or get gaso-line in your eyes, get immediate medicalattention.

� If any gasoline spills onto your skin, im-mediately wash with soap and water.Change clothing if gasoline spills on it.

� Touch the fuel nozzle to the filler open-ing or funnel to help prevent electrostat-ic sparks.

CAUTION:ECM00010

Use only new clean gasoline which hasbeen stored in clean containers and is notcontaminated with water or foreign matter.

EMU25570

GasolineIf knocking or pinging occurs, use a differentbrand of gasoline or premium unleaded fuel.

GasoholThere are two types of gasohol: gasohol con-taining ethanol and that containing methanol.Gasohol containing ethanol can be used ifethanol content does not exceed 10% and thefuel meets minimum octane ratings. Yamahadoes not recommended gasohol containingmethanol because it can cause fuel systemdamage or engine performance problems.

EMU25650

Engine oil

If the recommended engine oil is not avail-able, another 2-stroke engine oil with anNMMA-certified TC-W3 rating may be used.EMU25741

Propeller selectionThe performance of your outboard motor willbe critically affected by your choice of propel-ler, as an incorrect choice could adversely af-fect performance and could also seriouslydamage the motor. Engine speed depends onthe propeller size and boat load. If enginespeed is too high or too low for good engineperformance, this will have an adverse effecton the engine.Yamaha outboard motors are fitted with pro-pellers chosen to perform well over a range ofapplications, but there may be uses where apropeller with a different pitch would be moreappropriate. For a greater operating load, asmaller-pitch propeller is more suitable as itenables the correct engine speed to be main-tained. Conversely, a larger-pitch propeller ismore suitable for a smaller operating load.Yamaha dealers stock a range of propellers,and can advise you and install a propeller onyour outboard that is best suited to your appli-cation.

Recommended gasoline:Regular unleaded gasoline with a minimum octane rating of 86 (Pump Octane Number) = (R+M)/2

Recommended engine oil:YAMALUBE 2-stroke outboard motor oil


General information

9

NOTE:Select a propeller which will allow the engineto reach the middle or upper half of the oper-ating range at full throttle with the maximumboat load. If operating conditions such as lightboat loads then allow the engine r/min to riseabove the maximum recommended range, re-duce the throttle setting to maintain the en-gine in the proper operating range.

For instructions on propeller removal and in-stallation, see page 40.EMU25770

Start-in-gear protectionYamaha outboard motors or Yamaha-ap-proved remote control units are equipped withstart-in-gear protection device(s). This featurepermits the engine to be started only when itis in neutral. Always select neutral beforestarting the engine.

1. Propeller diameter in inches2. Propeller pitch in inches3. Type of propeller (propeller mark)

ZMU04606

-x1 2 3


Basic components

10

EMU25795

Main components

NOTE:* May not be exactly as shown; also may not be included as standard equipment on all models.

EMU25802

Fuel tankIf your model was equipped with a portablefuel tank, its function is as follows.

WARNINGEWM00020

The fuel tank supplied with this engine isits dedicated fuel reservoir and must notbe used as a fuel storage container. Com-mercial users should conform to relevantlicensing or approval authority regula-tions.

1. Top cowling2. Top cowling lock lever3. Cooling water pilot hole4. Tilt lock lever5. Manual starter handle6. Gear shift lever7. Engine stop button/Engine stop lanyard

switch8. Throttle grip9. Throttle friction adjuster10.Clamp screw11.Carrying handle12.Choke knob13.Rope attachment14.Clamp bracket15.Trim rod16.Anti-cavitation plate

17.Cooling water inlet18.Propeller*19.Fuel hose


Basic components

11

EMU25830

Fuel jointThis joint is used to connect the fuel line.EMU25841

Fuel gaugeThis gauge is located on either the fuel tankcap or on the fuel joint base. It shows the ap-proximate amount of fuel remaining in thetank.EMU25850

Fuel tank capThis cap seals the fuel tank. When removed,the tank can be filled with fuel. To remove thecap, turn it counterclockwise.EMU25860

Air vent screwThis screw is on the fuel tank cap. To loosenthe screw, turn it counterclockwise.EMU25911

Tiller handleTo change direction, move the tiller handle tothe left or right as necessary.

EMU25922

Gear shift leverPulling the gear shift lever towards you putsthe engine in forward gear so that the boatmoves ahead. Pushing the lever away fromyou puts the engine in reverse gear so that theboat moves astern.

EMU25941

Throttle gripThe throttle grip is on the tiller handle. Turnthe grip counterclockwise to increase speedand clockwise to decrease speed.

1. Fuel joint2. Fuel gauge3. Fuel tank cap4. Air vent screw

ZMU02284

3

1

4

2

1. Forward “ ”2. Neutral “ ”3. Reverse “ ”


Basic components

12

EMU25961

Throttle indicatorThe fuel consumption curve on the throttle in-dicator shows the relative amount of fuel con-sumed for each throttle position. Choose thesetting that offers the best performance andfuel economy for the desired operation.

EMU25970

Throttle friction adjusterA friction device provides adjustable resis-tance to movement of the throttle grip or theremote control lever, and can be set accord-ing to operator preference.To increase resistance, turn the adjusterclockwise. To decrease resistance, turn theadjuster counterclockwise.

WARNINGEWM00030

Do not overtighten the friction adjuster. Ifthere is too much resistance, it could bedifficult to move throttle lever or grip,which could result in an accident.

When constant speed is desired, tighten theadjuster to maintain the desired throttle set-ting.EMU25990

Engine stop lanyard switchThe lock plate must be attached to the enginestop switch for the engine to run. The lanyardshould be attached to a secure place on theoperator’s clothing, or arm or leg. Should theoperator fall overboard or leave the helm, thelanyard will pull out the lock plate, stopping ig-nition to the engine. This will prevent the boatfrom running away under power.

WARNINGEWM00120

� Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg while operating.

� Do not attach the lanyard to clothingthat could tear loose. Do not route thelanyard where it could become entan-gled, preventing it from functioning.

� Avoid accidentally pulling the lanyardduring normal operation. Loss of enginepower means the loss of most steering

1. Throttle indicator


Basic components

13

control. Also, without engine power, theboat could slow rapidly. This couldcause people and objects in the boat tobe thrown forward.

NOTE:The engine cannot be started with the lockplate removed.

EMU26001

Engine stop buttonTo open the ignition circuit and stop the en-gine, push this button.

EMU26030

Choke knobTo supply the engine with the rich fuel mixturerequired to start, pull out this knob. The chokeknob has the 4 operating positions shown inthe following illustration.

EMU26070

Manual starter handleTo start the engine, first gently pull the handleout until resistance is felt. From that position,then pull the handle straight out quickly tocrank the engine.

EMU26122

Steering friction adjusterA friction device provides adjustable resis-tance to the steering mechanism, and can beset according to operator preference. An ad-justing screw or bolt is located on the swivelbracket.

1. Lanyard2. Lock plate

1. Use to start a hot engine2. Use to warm up a cold engine or restart a

warm engine3. Use to warm up a cold engine or restart a

warm engine4. Use to start a cold engine


Basic components

14

To increase resistance, turn the adjusterclockwise.To decrease resistance, turn the adjustercounterclockwise.

WARNINGEWM00040

Do not overtighten the friction adjuster. Ifthere is too much resistance, it could bedifficult to steer, which could result in anaccident.

EMU26261

Trim rod (tilt pin)The position of the trim rod determines theminimum trim angle of the outboard motor inrelation to the transom.

EMU30440

Tilt lock mechanismThe tilt lock mechanism is used to prevent theoutboard motor from lifting out of the waterwhen in reverse gear.

To tilt the outboard motor up, set the tilt locklever to the “ ” (up) position. To tilt the out-board motor down, set the tilt lock lever to the“ ” (down) position.EMU26330

Tilt support barThe tilt support bar keeps the outboard motorin the tilted up position.

EMU26372

Top cowling lock lever(s) (turn type)To remove the engine top cowling, turn thelock lever(s) and lift off the cowling. When in-stalling the cowling, check to be sure it fitsproperly in the rubber seal. Then lock thecowling again by returning the lever(s) to thelock position.

1. Tilt lock lever


Basic components

15

EMU26430

Carrying handleA carrying handle is included on the clampbracket. After setting the handle up, it enablesyou to carry the outboard motor easily withone hand.To set up the carrying handle, proceed as fol-lows:1. Place the tilt lock lever in the lock posi-

tion.2. Securely hook the arm on the carrying

handle end to the clamp bracket bar.

CAUTION:ECM00080

Place the tilt lock lever in the lock positionwhile using the carrying handle. Other-wise, the lower unit could fall to theground while carrying the motor.

1. Top cowling lock lever(s)

1. Clamp bracket bar


Operation

16

EMU26901

Installation

CAUTION:ECM00110

Incorrect engine height or obstructions tosmooth water flow (such as the design orcondition of the boat, or accessories suchas transom ladders or depth finder trans-ducers) can create airborne water spraywhile the boat is cruising. Severe enginedamage may result if the motor is operat-ed continuously in the presence of air-borne water spray.

NOTE:During water testing check the buoyancy ofthe boat, at rest, with its maximum load.Check that the static water level on the ex-haust housing is low enough to prevent waterentry into the powerhead, when water risesdue to waves when the outboard is not run-ning.

EMU26910

Mounting the outboard motor

WARNINGEWM00820

� Overpowering a boat could cause se-vere instability. Do not install an out-board motor with more horsepower thanthe maximum rating on the capacityplate of the boat. If the boat does nothave a capacity plate, consult the boatmanufacturer.

� The information presented in this sec-tion is intended as reference only. It isnot possible to provide complete in-structions for every possible boat andmotor combination. Proper mountingdepends in part on experience and thespecific boat and motor combination.

WARNINGEWM00830

Improper mounting of the outboard motorcould result in hazardous conditions suchas poor handling, loss of control, or firehazards. Observe the following:� For permanently mounted models, your

dealer or other person experienced inproper rigging should mount the motor.If you are mounting the motor yourself,you should be trained by an experiencedperson.

� For portable models, your dealer or oth-er person experienced in proper out-board motor mounting should show youhow to mount your motor.

Mount the outboard motor on the center line(keel line) of the boat, and ensure that theboat itself is well balanced. Otherwise theboat will be hard to steer. For boats without akeel or which are asymmetrical, consult yourdealer.

EMU26920

Mounting heightTo run your boat at optimum efficiency, thewater resistance (drag) of the boat and out-board motor must be made as little as possi-ble. The mounting height of the outboardmotor greatly affects the water resistance. Ifthe mounting height is too high, cavitation

1. Center line (keel line)

ZMU017601


Operation

17

tends to occur, thus reducing the propulsion;and if the propeller tips cut the air, the enginespeed will rise abnormally and cause the en-gine to overheat. If the mounting height is toolow, the water resistance will increase andthereby reduce engine efficiency. Mount theoutboard motor so that the anti-cavitationplate is between the bottom of the boat and alevel 25 mm (1 in.) below it.

NOTE:� The optimum mounting height of the out-

board motor is affected by the boat and mo-tor combination and the desired use. Testruns at different heights can help determinethe optimum mounting height. Consult yourYamaha dealer or boat manufacturer forfurther information on determining the prop-er mounting height.

� For instructions on setting the trim angle ofthe outboard motor, see page 26.

EMU26970

Clamping the outboard motor1. Place the outboard motor on the transom

so that it is positioned as close to the cen-ter as possible. Tighten the transomclamp screws evenly and securely. Oc-casionally check the clamp screws fortightness during operation of the out-board motor because they could becomeloose due to engine vibration.

WARNINGEWM00640

Loose clamp screws could allow the out-board motor to fall off or move on the tran-som. This could cause loss of control andserious injury. Make sure the transomscrews are tightened securely. Occasion-ally check the screws for tightness duringoperation.

2. If the engine restraint cable attachment isequipped on your engine, an engine re-straint cable or chain should be used. At-tach one end to the engine restraint cableattachment and the other to a securemounting point on the boat. Otherwisethe engine could be completely lost if itaccidentally falls off the transom.

ZMU02011

0–25mm(0–1in.)

ZMU02012

ZMU02013


Operation

18

3. Secure the clamp bracket to the transomusing the bolts provided with the out-board (if packed). For details, consultyour Yamaha dealer.

WARNINGEWM00650

Avoid using bolts, nuts or washers otherthan those contained in the engine pack-aging. If used, they must be of at least thesame quality of material and strength andmust be tightened securely. After tighten-ing, test run the engine and check theirtightness.

EMU30172

Breaking in engineYour new engine requires a period of break-into allow mating surfaces of moving parts towear in evenly. Correct break-in will help en-sure proper performance and longer enginelife.

CAUTION:ECM00800

Failure to follow the break-in procedurecould result in reduced engine life or evensevere engine damage.

EMU27050

Gasoline and engine oil mixing chart (25:1)

CAUTION:ECM00150

Be sure to mix gasoline and oil complete-ly, otherwise the engine may be damaged.

EMU27073

Procedure for pre-mixed modelsRun the engine under load (in gear with a pro-peller installed) as follows.1. First 10 minutes:

Run the engine at the lowest possiblespeed. A fast idle in neutral is best.

2. Next 50 minutes:Do not exceed half throttle (approximate-ly 3000 r/min). Vary engine speed occa-sionally. If you have an easy-planingboat, accelerate at full throttle onto plane,then immediately reduce the throttle to3000 r/min or less.

3. Second hour:Accelerate at full throttle onto plane, thenreduce engine speed to three-quarterthrottle (approximately 4000 r/min). Varyengine speed occasionally. Run at fullthrottle for one minute, then allow about10 minutes of operation at three-quarterthrottle or less to let the engine cool.

4. Third through tenth hours:Avoid operating at full throttle for morethan 5 minutes at a time. Let the enginecool between full-throttle runs. Vary en-gine speed occasionally.

5. After the first 10 hours:Operate the engine normally. Use thestandard premix ratio of gasoline and oil.For details on mixing fuel and oil, seepage 19.

1. : Gasoline2. : Engine oil


Operation

19

EMU27101

Preoperation checks

WARNINGEWM00080

If any item in the preoperation check is notworking properly, have it inspected andrepaired before operating the outboardmotor. Otherwise an accident could occur.

CAUTION:ECM00120

Do not start the engine out of water. Over-heating and serious engine damage canoccur.

EMU27110

Fuel� Check to be sure you have plenty of fuel for

your trip.� Make sure there are no fuel leaks or gaso-

line fumes.� Check fuel line connections to be sure they

are tight (if equipped Yamaha fuel tank orboat tank).

� Be sure the fuel tank is positioned on a se-cure, flat surface, and that the fuel line is nottwisted or flattened, or likely to contactsharp objects (if equipped Yamaha fueltank or boat tank).

EMU27120

Oil� Check to be sure you have plenty of oil for

your trip.EMU27130

Controls� Check throttle, shift, and steering for proper

operation before starting the engine.� The controls should work smoothly, without

binding or unusual free play.� Look for loose or damaged connections.� Check operation of the starter and stop

switches when the outboard motor is in thewater.

EMU27140

Engine� Check the engine and engine mounting.� Look for loose or damaged fasteners.� Check the propeller for damage.EMU27233

Filling fuel and engine oilEMU27242

Filling fuel for portable tank

WARNINGEWM00060

Gasoline and its vapors are highly flam-mable and explosive. Keep away fromsparks, cigarettes, flames, or other sourc-es of ignition.

1. Remove the fuel tank cap.2. Fill the fuel tank carefully.3. Close the cap securely after refueling.

Wipe up any spilled fuel.

EMU27270

Ring Free Fuel AdditiveGasoline is a precise blend of many differentsubstances, each chosen to give certain char-acteristics. Gasoline blends have beenchanging in recent years in response to con-cerns about pollution and resulting emissionsregulations. One of the most obvious changeshas been the elimination of lead from most fu-els.As gasoline has changed, the amount of addi-tives such as aromatics and oxygenates hasincreased. These additives are important forthe engines in passenger cars, but they canhave detrimental effects in marine engines,because of increased deposits in the combus-tion chamber. When enough deposits collect,piston rings begin sticking. Performancedrops and engine wear increases dramatical-ly.

Fuel tank capacity (if equipped Yamaha fuel tank):

24.0 L (6.34 US gal) (5.28 Imp.gal)


Operation

20

While many additives available may reducedeposits, Yamaha recommends the use ofRing Free Fuel Additive, available from yourYamaha dealer. Ring Free Fuel Additivehas repeatedly proven its ability to clean com-bustion deposits from inside the engine, nota-bly the critical piston-ring-land area, and fuelsystem components. Follow product labelingfor use instructions.EMU27403

Gasoline and oil mixing (100:1)

If equipped with a portable fuel tank1. Pour oil into the portable fuel tank, and

then add gasoline.

2. Replace the fuel tank cap and close tight-ly.

3. Shake the fuel tank to mix the fuel thor-oughly.

4. Make sure that the oil and gasoline aremixed.

If equipped with a built-in fuel tank1. Pour oil into a clean fuel can, and then

add gasoline.2. Replace the fuel can cap and close tight-

ly.3. Shake the fuel can to mix the fuel thor-

oughly.4. Make sure that the oil and gasoline are

mixed.5. Pour the gasoline and oil mixture into the

built-in fuel tank.

CAUTION:ECM00810

� Avoid using any oil other than the spec-ified type.

� Use a thoroughly blended fuel-oil mix-ture.

� If the mixture is not thoroughly mixed, orif the mixing ratio is incorrect, the fol-lowing problems could occur. Low oilratio: Lack of oil could cause major en-gine trouble, such as piston seizure.

� High oil ratio: Too much oil could causefouled spark plugs, smoky exhaust, andheavy carbon deposits.

NOTE:If using a permanently installed tank, pour theoil gradually as the gasoline is being added tothe tank.

Gasoline to engine oil ratio

Break-in period See page 18After break-in 100:1

1. Engine oil2. Gasoline


Operation

21

EMU27450

Operating engineEMU27461

Feeding fuel (portable tank)

WARNINGEWM00420

� Before starting the engine, make surethat the boat is tightly moored and thatyou can steer clear of any obstructions.Be sure there are no swimmers in thewater near you.

� When the air vent screw is loosened,gasoline vapor will be released. Gaso-line is highly flammable, and its vaporsare flammable and explosive. Refrainfrom smoking, and keep away fromopen flames and sparks while looseningthe air vent screw.

� This product emits exhaust gases whichcontain carbon monoxide, a colorless,odorless gas which could cause braindamage or death when inhaled. Symp-toms include nausea, dizziness, anddrowsiness. Keep cockpit and cabin ar-eas well ventilated. Avoid blocking ex-haust outlets.

1. If there is an air vent screw on the fueltank cap, loosen it 2 or 3 turns.

2. If there is a fuel joint on the motor, firmlyconnect the fuel line to the joint. Thenfirmly connect the other end of the fuelline to the joint on the fuel tank.

3. If a steering friction adjuster is providedon your outboard motor, securely attachthe fuel line to the fuel line clamp.

NOTE:During engine operation place the tank hori-zontally, otherwise fuel cannot be drawn fromthe fuel tank.

4. Squeeze the primer pump with the outletend up until you feel it become firm.

ZMU02295

ZMU02024


Operation

22

EMU27490

Starting engineEMU27530

Manual start models1. Place the gear shift lever in neutral.

NOTE:The start-in-gear protection device preventsthe engine from starting except when in neu-tral.

2. Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg. Then install the lock plate onthe other end of the lanyard into the en-gine stop switch.

WARNINGEWM00120


� Do not attach the lanyard to clothingthat could tear loose. Do not route thelanyard where it could become entan-gled, preventing it from functioning.

� Avoid accidentally pulling the lanyardduring normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power, theboat could slow rapidly. This couldcause people and objects in the boat tobe thrown forward.

3. Place the throttle grip in the “ ”(start) position.

4. Pull out / turn the choke knob fully. Placethe choke knob back in to the second orthird position to warm up the engine afterstarting. When the engine has fullywarmed up, replace the choke knob backin to its home position.

ZMU02025


Operation

23

NOTE:� It is not necessary to use the choke when

starting a warm engine.� If the choke knob is left in the pulled out po-

sition while the engine is running, the en-gine will run poorly or stall.

5. Pull the manual starter handle slowly untilyou feel resistance. Then give a strongpull straight out to crank and start the en-gine. Repeat if necessary.

6. After the engine starts, slowly return themanual starter handle to its original posi-tion before releasing it.

7. Slowly return the throttle grip to the fullyclosed position.

NOTE:� When the engine is cold, it needs to be

warmed up. For further information, seepage 23.

� If the engine does not start on the first try,repeat the procedure. If the engine fails tostart after 4 or 5 tries, open the throttle asmall amount (between 1/8 and 1/4) and tryagain. Also if the engine is warm and fails tostart, open the throttle a same amount andtry to start the engine again. If the enginestill fails to start, see page 45.

EMU27670

Warming up engineEMU27680

Choke start models1. After starting the engine, allow it to idle for

3 minutes to warm up. Failure to do so willshorten engine life. Gradually return thechoke knob to its home position as theengine warms up.

2. Check for a steady flow of water from thecooling water pilot hole.

CAUTION:ECM00510

A flow of water from the hole on the ex-haust cover shows that the water pump ispumping water through the cooling pas-sages. If water is not flowing out of thehole at all times while the engine is run-ning, overheating and serious damagecould occur. Stop the engine and checkwhether the cooling water inlet on the low-er case or the cooling water pilot hole isblocked. Consult your Yamaha dealer ifthe problem cannot be located and cor-rected.


Operation

24

EMU27740

Shifting

WARNINGEWM00180

Before shifting, make sure there are noswimmers or obstacles in the water nearyou.

CAUTION:ECM00220

To change the boat direction or shiftingposition from forward to reverse or vice-versa, first close the throttle so that the en-gine idles (or runs at low speeds).

EMU27763

Forward (tiller handle and remote control models)Tiller control models1. Place the throttle grip in the fully closed

position.

2. Move the gear shift lever quickly and firm-ly from neutral to forward.

Remote control modelsPull up the neutral interlock trigger (ifequipped) and move the remote control leverquickly and firmly from neutral to forward.EMU27795

Reverse (manual tilt and hydro tilt models)

WARNINGEWM00190

When operating in reverse, go slowly. Donot open the throttle more than half. Other-wise the boat could become unstable,which could result in loss of control andan accident.

Tiller control models1. Place the throttle grip in the fully closed

position.

2. On models equipped with a tilt lock lever,check that it is in the lock/down position.

ZMU02856

ZMU02030

ZMU02030


Operation

25

3. Move the gear shift lever quickly and firm-ly from neutral to reverse.

Remote control models1. Check that the tilt lock lever is in the lock

position.2. Pull up the neutral interlock trigger (if

equipped) and move the remote controllever quickly and firmly from neutral to re-verse.

EMU27820

Stopping engineBefore stopping the engine, first let it cool offfor a few minutes at idle or low speed. Stop-ping the engine immediately after operating athigh speed is not recommended.EMU27832

Procedure1. Push and hold the engine stop button un-

til the engine comes to a complete stop.

2. After stopping the engine, tighten the airvent screw on the fuel tank cap and setthe fuel cock lever or knob to the closedposition, if equipped.

3. Disconnect the fuel line if you are usingan external fuel tank.

ZMU02301


Operation

26

NOTE:If the outboard motor is equipped with an en-gine stop switch lanyard, the engine can alsobe stopped by pulling the lanyard and remov-ing the lock plate from the engine stop switch.

EMU27861

Trimming outboard motorThe trim angle of the outboard motor helpsdetermine the position of the bow of the boatin the water. Correct trim angle will help im-prove performance and fuel economy whilereducing strain on the engine. Correct trim an-gle depends upon the combination of boat,engine, and propeller. Correct trim is also af-fected by variables such as the load in theboat, sea conditions, and running speed.

WARNINGEWM00740

Excessive trim for the operating condi-tions (either trim up or trim down) cancause boat instability and can make steer-ing the boat more difficult. This increasesthe possibility of an accident. If the boatbegins to feel unstable or is hard to steer,slow down and/or readjust the trim angle.

EMU27871

Adjusting trim angle for manual tilt modelsThere are 4 or 5 holes provided in the clampbracket to adjust the outboard motor trim an-gle.1. Stop the engine.2. Remove the trim rod from the clamp

bracket while slightly tilting the outboardmotor up.

1. Trim operating angle

1. Trim rod

ZMU02043

1


Operation

27

3. Reposition the rod in the desired hole.To raise the bow (“trim-out”), move the rodaway from the transom.To lower the bow (“trim-in”), move the rod to-ward the transom.Make test runs with the trim set to different an-gles to find the position that works best foryour boat and operating conditions.

WARNINGEWM00400

� Stop the engine before adjusting thetrim angle.

� Use care to avoid being pinched whenremoving or installing the rod.

� Use caution when trying a trim positionfor the first time. Increase speed gradu-ally and watch for any signs of instabilityor control problems. Improper trim an-gle can cause loss of control.

NOTE:The outboard motor trim angle can bechanged approximately 4 degrees by shiftingthe trim rod one hole.

EMU27911

Adjusting boat trimWhen the boat is on plane, a bow-up attituderesults in less drag, greater stability and effi-ciency. This is generally when the keel line ofthe boat is up about 3 to 5 degrees. With thebow up, the boat may have a greater tenden-cy to steer to one side or the other. Compen-sate for this as you steer. The trim tab canalso be adjusted to help offset this effect.When the bow of the boat is down, it is easierto accelerate from a standing start onto plane.

Bow UpToo much trim-out puts the bow of the boattoo high in the water. Performance and econ-omy are decreased because the hull of theboat is pushing the water and there is more airdrag. Excessive trim-out can also cause thepropeller to ventilate, which reduces perfor-mance further, and the boat may “porpoise”(hop in the water), which could throw the op-erator and passengers overboard.

Bow DownToo much trim-in causes the boat to “plow”through the water, decreasing fuel economyand making it hard to increase speed. Operat-ing with excessive trim-in at higher speedsalso makes the boat unstable. Resistance atthe bow is greatly increased, heightening thedanger of “bow steering” and making opera-tion difficult and dangerous.


Operation

28

NOTE:Depending on the type of boat, the outboardmotor trim angle may have little effect on thetrim of the boat when operating.

EMU27931

Tilting up and downIf the engine will be stopped for some time orif the boat is moored in shallows, the outboardmotor should be tilted up to protect the propel-ler and casing from damage by collision withobstructions, and also to reduce salt corro-sion.

WARNINGEWM00220

Be sure all people are clear of the out-board motor when tilting up and down,also be careful not to pinch any body partsbetween the drive unit and engine bracket.

WARNINGEWM00250

Leaking fuel is a fire hazard. If there is afuel joint on the outboard motor, discon-nect the fuel line or close the fuel cock ifthe engine will be tilted for more than a fewminutes. Otherwise fuel may leak.

CAUTION:ECM00241

� Before tilting the outboard motor, stopthe engine by following the procedureon page 25. Never tilt the outboard mo-tor while the engine is running. Severedamage from overheating can result.

� Do not tilt up the engine by pushing thetiller handle (if equipped) because thiscould break the handle.

EMU27975

Procedure for tilting up (manual tilt models)1. Place the gear shift lever in neutral.

2. Disconnect the fuel line from the out-board motor.

3. Place the tilt lock lever (if equipped) in therelease/up position.


Operation

29

4. Pull up the shallow water lever (ifequipped).

5. Hold the rear of the top cowling with onehand and tilt the engine up fully.

6. Push the tilt support knob into the clampbracket. Or the tilt support bar will turn tothe lock position automatically.

EMU28022

Procedure for tilting down (manual tilt models)1. Place the tilt lock lever in the re-

lease/down position or return the shallowwater lever to its original position.

2. Slightly tilt the engine up until the tilt sup-port bar is automatically released.

3. Slowly tilt the engine down.EMU28060

Cruising in shallow waterThe outboard motor can be tilted up partiallyto allow operation in shallow water.EMU28071

Cruising in shallow water (manual tilt models)

WARNINGEWM00710

� Place the gear shift in neutral before us-ing the shallow water cruising system.

� Run the boat at the lowest possiblespeed when using the shallow watercruising system. The tilt lock mecha-nism does not work while the shallowwater cruising system is being used. Hit-ting an underwater obstacle couldcause the outboard motor to lift out ofthe water, resulting in loss of control.

� Do not rotate the outboard motor 180°and operate the boat in reverse. Placethe gear shift in reverse to operate theboat in reverse.

� Use extra care when operating in re-verse. Too much reverse thrust cancause the outboard motor to lift out ofthe water, increasing the chance of acci-dent and personal injury.


Operation

30

� Return the outboard motor to its normalposition as soon as the boat is back indeeper water.

CAUTION:ECM00260

Do not tilt the outboard motor up so thatthe cooling water inlet on the lower unit isabove the surface of the water when set-ting up for and cruising in shallow water.Otherwise severe damage from overheat-ing can result.

EMU28123

Procedure1. Place the gear shift lever in neutral.

2. Place the tilt lock lever in the release/upposition.

3. Slightly tilt the outboard motor up. The tiltsupport bar will lock automatically, sup-porting the outboard motor in a partiallyraised position.

NOTE:This outboard motor has 2 positions for shal-low water cruising.

4. To return the outboard motor to the nor-mal running position, place the gear shiftlever in neutral, then place the tilt lock le-ver in the lock/down position.

ZMU02868


Operation

31

5. Slightly tilt the outboard motor up until thetilt support bar automatically returns tothe free position.

6. Slowly lower the outboard motor to thenormal position.

EMU28190

Cruising in other conditionsCruising in salt waterAfter operating in salt water, wash out thecooling water passages with fresh water toprevent them from becoming clogged with saltdeposits.

NOTE:For cooling system flushing instructions, seepage 32.

Cruising in turbid waterYamaha strongly recommends that you usethe optional chromium-plated water pump kitif you use the outboard motor in turbid (mud-dy) water conditions.

ZMU02048


Maintenance

32

EMU28216

SpecificationsDimension:

Overall length:873 mm (34.4 in)

Overall width:332 mm (13.1 in)

Overall height S:1040 mm (40.9 in)

Transom height S:440 mm (17.3 in)

Weight (AL) S:36.0 kg (79 lb)

Performance:Full throttle operating range:

4500–5500 r/minMaximum output:

15MH 11.0 kW@5000 r/min (15 HP@5000 r/min)9.9MH 7.3 kW@5000 r/min (10 HP@5000 r/min)

Idling speed (in neutral):750 ±50 r/min

Engine:Type:

2-stroke LDisplacement:

246.0 cm³ (15.01 cu.in)Bore × stroke:

56.0 × 50.0 mm (2.20 × 1.97 in)Ignition system:

CDISpark plug (NGK):

B7HS-10Spark plug with resistor (NGK):

BR7HS-10Spark plug gap:

0.9–1.0 mm (0.035–0.039 in)Control system:

TillerStarting system:

ManualStarting carburetion system:

Choke valveDrive unit:

Gear positions:Forward-neutral-reverse

Gear ratio:2.08 (27/13)

Trim and tilt system:Manual tilt

Propeller mark:J

Fuel and oil:Recommended fuel:

Regular unleaded gasolineMin. pump octane:

86Fuel tank capacity:

24.0 L (6.34 US gal) (5.28 Imp.gal)Recommended engine oil:

YAMALUBE 2-stroke outboard motor oilFuel:oil ratio:Regular gasoline:

100 :1Lubrication:

Pre-mixed fuel and oilRecommended gear oil:

Hypoid gear oil SAE#90Gear oil quantity:

250.0 cm³ (8.45 US oz) (8.82 Imp.oz)Tightening torque for engine:

Spark plug:25.0 Nm (18.4 ft-lb) (2.55 kgf-m)

Propeller nut:17.0 Nm (12.5 ft-lb) (1.73 kgf-m)

EMU28222

Transporting and storing outboard motor

WARNINGEWM00690

� Leaking fuel is a fire hazard. When trans-porting and storing the outboard motor,close the air vent screw and fuel cock toprevent fuel from leaking.

� USE CARE when transporting fuel tank,whether in a boat or car.

� DO NOT fill fuel container to maximumcapacity. Gasoline will expand consider-ably as it warms up and can build uppressure in the fuel container. This cancause fuel leakage and a potential firehazard.


Maintenance

33

WARNINGEWM00700

Never get under the lower unit while it istilted, even if a motor support bar is used.Severe injury could occur if the outboardmotor accidentally falls.

CAUTION:ECM00660

Do not use the tilt support lever or knobwhen trailering the boat. The outboard mo-tor could shake loose from the tilt supportand fall. If the motor cannot be trailered inthe normal running position, use an addi-tional support device to secure it in the tiltposition.

The outboard motor should be trailered andstored in the normal running position. If thereis insufficient road clearance in this position,then trailer the outboard motor in the tilt posi-tion using a motor support device such as atransom saver bar. Consult your Yamahadealer for further details.EMU28235

Clamp screw mounting modelsWhen transporting or storing the outboardmotor while removed from a boat, keep theoutboard motor in the attitude shown.

NOTE:Place a towel or something similar under theoutboard motor to protect it from damage.

EMU30272

Storing outboard motorWhen storing your Yamaha outboard motorfor prolonged periods of time (2 months orlonger), several important procedures mustbe performed to prevent excessive damage.It is advisable to have your outboard motorserviced by an authorized Yamaha dealer pri-or to storage. However, you, the owner, with aminimum of tools, can perform the followingprocedures.

CAUTION:ECM01411

� Do not place the outboard motor on itsside before the cooling water hasdrained from it completely, otherwisewater may enter the cylinder through theexhaust port and cause engine trouble.

� Store the outboard motor in a dry, well-ventilated place, not in direct sunlight.

EMU28301

ProcedureEMU28372

Flushing in a test tank1. Wash the outboard motor body using

fresh water. For further information, seepage 35.


Maintenance

34

2. Fill the fuel tank with fresh fuel and addone ounce of “Yamaha Fuel Conditionerand Stabilizer” (Part No. LUB-FUELC-12-00) to each gallon of fuel.

NOTE:The use of “Yamaha Fuel Conditioner andStabilizer” eliminates the need to drain thefuel system. Consult your Yamaha dealer orother qualified mechanic if the fuel system isto be drained instead.

3. Remove the engine top cowling and si-lencer cover.

4. Install the outboard motor on the testtank.

5. Fill the tank with fresh water to above thelevel of the anti-cavitation plate.

CAUTION:ECM00300

Do not run the engine without supplying itwith cooling water. Either the engine waterpump will be damaged or the engine willbe damaged from overheating. Beforestarting the engine, be sure to supply wa-ter to the cooling water passages.

CAUTION:ECM00290

If the fresh water level is below the level ofthe anti-cavitation plate, or if the watersupply is insufficient, engine seizure mayoccur.

6. Cooling system flushing is essential toprevent the cooling system from cloggingup with salt, sand, or dirt. In addition, fog-ging of the engine is mandatory to pre-vent excessive engine damage due torust. Perform the flushing and fogging atthe same time.

WARNINGEWM00090


� Keep hands, hair, and clothes away fromthe flywheel and other rotating partswhile the engine is running.

7. Run the engine at a fast idle for 10–15minutes in neutral position.

8. Just prior to turning off the engine, quicklyspray “Yamaha Stor-Rite Engine FoggingOil” (Part No. LUB-STRRT-12-00) alter-nately into each carburetor or the fogginghole of the silencer cover, if equipped.When properly done, the engine willsmoke excessively and almost stall.

9. Remove the outboard motor from the testtank.

10. Drain the cooling water completely out ofthe motor. Clean the body thoroughly.

11. Install the silencer cover/cap and topcowling.

1. Water surface2. Lowest water level

ZMU02051

1

2


Maintenance

35

EMU28400

Lubrication (except oil injection models)1. Grease the spark plug threads and install

the spark plug(s) and torque to properspecification. For information on sparkplug installation, see page 37.

2. Change the gear oil. For instructions, seepage 42. Inspect the oil for the presenceof water that indicates a leaky seal. Sealreplacement should be performed by anauthorized Yamaha dealer prior to use.

3. Grease all grease fittings. For further de-tails, see page 37.

EMU28421

Cleaning and anticorrosion measures1. Wash down the exterior of the outboard

motor with fresh water and dry off com-pletely.

2. Spray the outboard motor exterior with“Yamaha Silicone Protectant” (Part No.LUB-SILCNE-13-00).

3. Wax the cowling with a non-abrasive waxsuch as “Yamaha Silicone Wax” (Part No.ACC-11000-15-02).

EMU28450

Cleaning the outboard motorAfter use, wash the exterior of the outboardmotor with fresh water. Flush the cooling sys-tem with fresh water.

NOTE:For cooling system flushing instructions, seepage 32.

EMU28460

Checking painted surface of motorCheck the motor for scratches, nicks, or flak-ing paint. Areas with damaged paint are morelikely to corrode. If necessary, clean and paintthe areas. A touch-up paint is available fromyour Yamaha dealer.EMU28483

Periodic maintenance

WARNINGEWM01070

Be sure to turn off the engine when youperform maintenance unless otherwisespecified. If you or the owner is not famil-iar with machine servicing, this workshould be done by your Yamaha dealer orother qualified mechanic.

Maintenance, replacement, or repair of theemission control devices and systemsmay be performed by any marine enginerepair establishment or individual. All war-ranty repairs, however, including those tothe emission control system, must be per-formed by an authorized Yamaha marinedealership.A service manual is available for purchasethrough your Yamaha dealer for owners whohave the mechanical skills, tools, and otherequipment necessary to perform mainte-nance not covered by this owner’s manual.EMU28510

Replacement partsIf replacement parts are necessary, use onlygenuine Yamaha parts or parts of the sametype and of equivalent strength and materials.Any part of inferior quality may malfunction,and the resulting loss of control could endan-


Maintenance

36

ger the operator and passengers. Yamahagenuine parts and accessories are availablefrom your Yamaha dealer.EMU28521

Maintenance chartFrequency of maintenance operations may be adjusted according to the operating conditions,but the following table gives general guidelines. Refer to the sections in this chapter for expla-nations of each owner-specific action.The “ ” symbol indicates the check-ups which you may carry out yourself.The “ ” symbol indicates work to be carried out by your Yamaha dealer.

NOTE:When operating in salt water, turbid or muddy water, the engine should be flushed with cleanwater after each use.

Item Actions

Initial Every

10 hours (1 month)

50 hours (3 months)

100 hours (6 months)

200 hours (1 year)

Anode(s) (external) Inspection / replacement

Anode(s) (internal) Inspection / replacement

Cooling water passages Cleaning

Cowling clamp Inspection

Fuel filter (can be disassembled) Inspection / cleaning

Fuel system Inspection

Fuel tank (Yamaha portable tank) Inspection / cleaning

Gear oil Change

Greasing points Greasing

Idling speed (carburetor models) Inspection / adjustment

Propeller and cotter pin Inspection / replacement

Shift link / shift cable Inspection / adjustment

Thermostat Inspection

Throttle link / throttle cable / throttle pick-up timing

Inspection / adjustment

Water pump Inspection

Spark plug(s) Cleaning / adjustment / replacement


Maintenance

37

EMU28931

GreasingYamaha marine grease (Water resistant grease)

EMU28951

Cleaning and adjusting spark plug

WARNINGEWM00560

When removing or installing a spark plug,be careful not to damage the insulator. Adamaged insulator could allow externalsparks, which could lead to explosion orfire.

The spark plug is an important engine compo-nent and is easy to inspect. The condition ofthe spark plug can indicate something aboutthe condition of the engine. For example, if thecenter electrode porcelain is very white, thiscould indicate an intake air leak or carburetionproblem in that cylinder. Do not attempt to di-agnose any problems yourself. Instead, takethe outboard motor to a Yamaha dealer. Youshould periodically remove and inspect the


Maintenance

38

spark plug because heat and deposits willcause the spark plug to slowly break downand erode. If electrode erosion becomes ex-cessive, or if carbon and other deposits areexcessive, you should replace the spark plugwith another of the correct type.

Before fitting the spark plug, measure theelectrode gap with a wire thickness gauge;adjust the gap to specification if necessary.

When fitting the plug, always clean the gasketsurface and use a new gasket. Wipe off anydirt from the threads and screw in the sparkplug to the correct torque.

NOTE:If a torque-wrench is not available when youare fitting a spark plug, a good estimate of thecorrect torque is 1/4 to 1/2 a turn past finger-

tight. Have the spark plug adjusted to the cor-rect torque as soon as possible with a torque-wrench.

EMU28962

Checking fuel system

WARNINGEWM00060

Gasoline and its vapors are highly flam-mable and explosive. Keep away fromsparks, cigarettes, flames, or other sourc-es of ignition.

WARNINGEWM00910

Leaking fuel can result in fire or explosion.� Check for fuel leakage regularly.� If any fuel leakage is found, the fuel sys-

tem must be repaired by a qualified me-chanic. Improper repairs can make theoutboard unsafe to operate.

Check the fuel lines for leaks, crack, or mal-function. If a problem is found, your Yamahadealer or other qualified mechanic should re-pair it immediately.

Checkpoints� Fuel system parts leakage� Fuel line joint leakage� Fuel line cracks or other damage� Fuel connector leakage

Standard spark plug:B7HS-10BR7HS-10

1. Spark plug gap2. Spark plug I.D. mark (NGK)

Spark plug gap:0.9–1.0 mm (0.035–0.039 in)

Spark plug torque:25.0 Nm (18.4 ft-lb) (2.55 kgf-m)


Maintenance

39

EMU28980

Inspecting fuel filter

WARNINGEWM00310

Gasoline is highly flammable, and its va-pors are flammable and explosive.� If you have any question about properly

doing this procedure, consult yourYamaha dealer.

� Do not perform this procedure on a hotor running engine. Allow the engine tocool.

� There will be fuel in the fuel filter. Keepaway from sparks, cigarettes, flames orother sources of ignition.

� This procedure will allow some fuel tospill. Catch fuel in a rag. Wipe up anyspilled fuel immediately.

� The fuel filter must be reassembledcarefully with the O-ring, filter cup, andhoses in place. Improper assembly orreplacement could result in a fuel leak,which could result in a fire or explosionhazard.

EMU29001

Cleaning fuel filter1. Remove the nut holding the fuel filter as-

sembly if equipped.

2. Unscrew the filter cup, catching anyspilled fuel in a rag.

3. Remove the filter element, and wash it insolvent. Allow it to dry. Inspect the filter el-ement and O-ring to make sure they arein good condition. Replace them if neces-sary. If any water is found in the fuel, theYamaha portable fuel tank or other fueltanks should be checked and cleaned.

4. Reinstall the filter element in the cup.Make sure the O-ring is in position in thecup. Firmly screw the cup onto the filterhousing.

5. Attach the filter assembly to the bracketso that the fuel hoses are attached to thefilter assembly.

6. Run the engine and check the filter andlines for leaks.

EMU29040

Inspecting idling speed

WARNINGEWM00450


� Keep hands, hair, and clothes away fromthe flywheel and other rotating partswhile the engine is running.

� 2-hp models: The propeller rotateswhenever the engine is running. Do notmove the throttle control lever from the

1. Filter cup2. Filter element3. O-ring4. Filter housing


Maintenance

40

start position during warm-up. The boatcould unexpectedly start to move, whichcould result in an accident.

CAUTION:ECM00490

This procedure must be performed whilethe outboard motor is in the water. A flush-ing attachment or test tank can be used.

A diagnostic tachometer should be used forthis procedure. Results may vary dependingon whether testing is conducted with theflushing attachment, in a test tank, or with theoutboard motor in the water.1. Start the engine and allow it to warm up

fully in neutral until it is running smoothly.2-hp model: Warm the engine with thethrottle in the start position or less. If theoutboard is mounted on a boat, be surethe boat is tightly moored.

NOTE:Correct idling speed inspection is only possi-ble if the engine is fully warmed up. If notwarmed up fully, the idle speed will measurehigher than normal. If you have difficulty veri-fying the idle speed, or the idle speed requiresadjustment, consult a Yamaha dealer or otherqualified mechanic.

2. Verify whether the idle speed is set tospecification. For idle speed specifica-tions, see page 32.

EMU29111

Checking wiring and connectors� Check that each grounding wire is properly

secured.� Check that each connector is engaged se-

curely.

EMU29120

Exhaust leakageStart the engine and check that no exhaustleaks from the joints between the exhaustcover, cylinder head, and body cylinder.EMU29130

Water leakageStart the engine and check that no waterleaks from the joints between the exhaustcover, cylinder head, and body cylinder.EMU29171

Checking propeller

WARNINGEWM00321

You could be seriously injured if the en-gine accidentally starts when you are nearthe propeller.� Before inspecting, removing, or install-

ing the propeller, remove the spark plugcaps from the spark plugs. Also, placethe shift control in neutral, turn the mainswitch to “ ” (off) and remove the key,and remove the lanyard from the enginestop switch. Turn off the battery cut-offswitch if your boat has one.

� Do not use your hand to hold the propel-ler when loosening or tightening thepropeller nut. Put a wood block betweenthe anti-cavitation plate and the propel-ler to prevent the propeller from turning.

ZMU02087


Maintenance

41

Checkpoints� Check each of the propeller blades for

wear, erosion from cavitation or ventilation,or other damage.

� Check the propeller shaft for damage.� Check the splines / shear pin for wear or

damage.� Check for fish line tangled around the pro-

peller shaft.

� Check the propeller shaft oil seal for dam-age.

NOTE:If the shear pin equipped: it is designed tobreak if the propeller hits a hard underwaterobstacle to help protect the propeller anddrive mechanism. The propeller will then spinfreely on the shaft. If this happens, the shearpin must be replaced.

EMU29193

Removing the propeller1. Straighten the cotter pin and pull it out us-

ing a pair of pliers.2. Remove the propeller nut, washer, and

spacer (if equipped).

3. Remove the propeller and thrust washer.EMU29230

Installing the propeller

CAUTION:ECM00340

� Be sure to install the thrust washer be-fore installing the propeller, otherwisethe lower case and propeller boss couldbe damaged.

� Be sure to use a new cotter pin and bendthe ends over securely. Otherwise thepropeller could come off during opera-tion and be lost.

ZMU01896

ZMU01897

1. Cotter pin2. Propeller nut3. Washer4. Propeller5. Thrust washer

ZMU02877

23

45

1


Maintenance

42

1. Apply Yamaha marine grease or a corro-sion resistant grease to the propellershaft.

2. Install the spacer(if equipped), thrustwasher, and propeller on the propellershaft.

3. Install the spacer (if equipped) and thewasher. Tighten the propeller nut to thespecified torque.

4. Align the propeller nut with the propellershaft hole. Insert a new cotter pin in thehole and bend the cotter pin ends.

NOTE:If the propeller nut does not align with the pro-peller shaft hole after tightening to the speci-fied torque, tighten the nut further to align itwith the hole.

EMU29280

Changing gear oil

WARNINGEWM00800

� Be sure the outboard motor is securelyfastened to the transom or a stablestand. You could be severely injured ifthe outboard motor falls on you.

� Never get under the lower unit while it istilted, even when the tilt support lever orknob is locked. Severe injury could oc-cur if the outboard motor accidentallyfalls.

1. Tilt the outboard motor so that the gear oildrain screw is at the lowest point possi-ble.

2. Place a suitable container under the gearcase.

3. Remove the gear oil drain screw.

NOTE:If the magnetic gear oil drain screw equipped:remove all metal particles from the screw be-fore installing it.

4. Remove the oil level plug to allow the oilto drain completely.

CAUTION:ECM00710

Inspect the used oil after it has beendrained. If the oil is milky, water is gettinginto the gear case which can cause geardamage. Consult a Yamaha dealer for re-pair of the lower unit seals.

NOTE:For disposal of used oil consult your Yamahadealer.

5. With the outboard motor in a vertical po-sition, and using a flexible or pressurizedfilling device, inject the gear oil into thegear oil drain screw hole.

1. Gear oil drain screw2. Oil level plug

ZMU02064

2

1


Maintenance

43

6. When the oil begins to flow out of the oillevel plug hole, insert and tighten the oillevel plug.

7. Insert and tighten the gear oil drainscrew.

EMU29302

Cleaning fuel tank

WARNINGEWM00920

Gasoline is highly flammable, and its va-pors are flammable and explosive.� If you have any question about properly

doing this procedure, consult yourYamaha dealer.

� Keep away from sparks, cigarettes,flames, or other sources of ignitionwhen cleaning the fuel tank.

� Remove the fuel tank from the boat be-fore cleaning it. Work only outdoors inan area with good ventilation.

� Wipe up any spilled fuel immediately.� Reassemble the fuel tank carefully. Im-

proper assembly can result in a fuelleak, which could result in a fire or ex-plosion hazard.

� Dispose of old gasoline according to lo-cal regulations.

1. Empty the fuel tank into an approved con-tainer.

2. Pour a small amount of suitable solventinto the tank. Install the cap and shakethe tank. Drain the solvent completely.

3. Remove the screws holding the fuel jointassembly. Pull the assembly out of thetank.

4. Clean the filter (located on the end of thesuction pipe) in a suitable cleaning sol-vent. Allow the filter to dry.

5. Replace the gasket with a new one. Re-install the fuel joint assembly and tightenthe screws firmly.

EMU29312

Inspecting and replacing anode(s)Yamaha outboard motors are protected fromcorrosion by sacrificial anodes. Inspect theexternal anodes periodically. Remove scalesfrom the surfaces of the anodes. Consult aYamaha dealer for replacement of externalanodes.

CAUTION:ECM00720

Do not paint anodes, as this would renderthem ineffective.

Recommended gear oil:Hypoid gear oil SAE#90

Gear oil quantity:250.0 cm³ (8.45 US oz) (8.82 Imp.oz)

ZMU02065

ZMU02324


Maintenance

44

NOTE:Inspect ground leads attached to external an-odes on equipped models. Consult a Yamahadealer for inspection and replacement of inter-nal anodes attached to the power unit.

EMU29390

Checking top cowlingCheck the fitting of the top cowling by pushingit with both hands. If it is loose have it repairedby your Yamaha dealer.EMU29400

Coating the boat bottomA clean hull improves boat performance. Theboat bottom should be kept as clean of marinegrowth as possible. If necessary, the boat bot-tom can be coated with an anti-fouling paintapproved for your area to inhibit marinegrowth.Do not use anti-fouling paint which includescopper or graphite. These paints can causemore rapid engine corrosion.

ZMU02067

ZMU01943


Trouble Recovery

45

EMU29422

TroubleshootingA problem in the fuel, compression, or ignitionsystems can cause poor starting, loss of pow-er, or other problems. This section describesbasic checks and possible remedies, and cov-ers all Yamaha outboard motors. Thereforesome items may not apply to your model.If your outboard motor requires repair, bring itto your Yamaha dealer.If the engine trouble warning indicator is flash-ing, consult your Yamaha dealer.

Starter will not operate.Q. Is battery capacity weak or low?A. Check battery condition. Use battery of rec-ommended capacity.

Q. Are battery connections loose or corrod-ed?A. Tighten battery cables and clean batteryterminals.

Q. Is fuse for electric start relay or electric cir-cuit blown?A. Check for cause of electric overload andrepair. Replace fuse with one of correct am-perage.

Q. Are starter components faulty?A. Have serviced by a Yamaha dealer.

Q. Is shift lever in gear?A. Shift to neutral.

Engine will not start (starter operates).Q. Is fuel tank empty?A. Fill tank with clean, fresh fuel.

Q. Is fuel contaminated or stale?A. Fill tank with clean, fresh fuel.

Q. Is fuel filter clogged?A. Clean or replace filter.

Q. Is starting procedure incorrect?A. See page 22.

Q. Has fuel pump malfunctioned?A. Have serviced by a Yamaha dealer.

Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replace withrecommended type.

Q. Are spark plug cap(s) fitted incorrectly?A. Check and re-fit cap(s).

Q. Is ignition wiring damaged or poorly con-nected?A. Check wires for wear or breaks. Tighten allloose connections. Replace worn or brokenwires.

Q. Are ignition parts faulty?A. Have serviced by a Yamaha dealer.

Q. Is engine stop switch lanyard not at-tached?A. Attach lanyard.

Q. Are engine inner parts damaged?A. Have serviced by a Yamaha dealer.

Engine idles irregularly or stalls.Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replace withrecommended type.

Q. Is fuel system obstructed?


Trouble Recovery

46

A. Check for pinched or kinked fuel line or oth-er obstructions in fuel system.



Q. Have ignition parts failed?A. Have serviced by a Yamaha dealer.

Q. Has warning system activated?A. Find and correct cause of warning.

Q. Is spark plug gap incorrect?A. Inspect and adjust as specified.


Q. Is specified engine oil not being used?A. Check and replace oil as specified.

Q. Is thermostat faulty or clogged?A. Have serviced by a Yamaha dealer.

Q. Are carburetor adjustments incorrect?A. Have serviced by a Yamaha dealer.

Q. Is fuel pump damaged?A. Have serviced by a Yamaha dealer.

Q. Is air vent screw on fuel tank closed?A. Open air vent screw.

Q. Is choke knob pulled out?

A. Return to home position.

Q. Is motor angle too high?A. Return to normal operating position.

Q. Is carburetor clogged?A. Have serviced by a Yamaha dealer.

Q. Is fuel joint connection incorrect?A. Connect correctly.

Q. Is throttle valve adjustment incorrect?A. Have serviced by a Yamaha dealer.

Q. Is battery cable disconnected?A. Connect securely.

Warning buzzer sounds or indicator lights.Q. Is cooling system clogged?A. Check water intake for restriction.

Q. Is engine oil level low?A. Fill oil tank with specified engine oil.

Q. Is heat range of spark plug incorrect?A. Inspect spark plug and replace it with rec-ommended type.

Q. Is specified engine oil not being used?A. Check and replace oil with specified type.

Q. Is engine oil contaminated or deteriorated?A. Replace oil with fresh, specified type.

Q. Is oil filter clogged?A. Have serviced by a Yamaha dealer.

Q. Has oil feed/injection pump malfunc-tioned?A. Have serviced by a Yamaha dealer.


Trouble Recovery

47

Q. Is load on boat improperly distributed?A. Distribute load to place boat on an evenplane.

Q. Is water pump or thermostat faulty?A. Have serviced by a Yamaha dealer.

Q. Is there excess water in fuel filter cup?A. Drain filter cup.

Engine power loss.Q. Is propeller damaged?A. Have propeller repaired or replaced.

Q. Is propeller pitch or diameter incorrect?A. Install correct propeller to operate outboardat its recommended speed (r/min) range.

Q. Is trim angle incorrect?A. Adjust trim angle to achieve most efficientoperation.

Q. Is motor mounted at incorrect height ontransom?A. Have motor adjusted to proper transomheight.

Q. Has warning system activated?A. Find and correct cause of warning.

Q. Is boat bottom fouled with marine growth?A. Clean boat bottom.

Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replace withrecommended type.

Q. Are weeds or other foreign matter tangledon gear housing?

A. Remove foreign matter and clean lowerunit.

Q. Is fuel system obstructed?A. Check for pinched or kinked fuel line or oth-er obstructions in fuel system.



Q. Is spark plug gap incorrect?A. Inspect and adjust as specified.


Q. Have ignition parts failed?A. Have serviced by a Yamaha dealer.

Q. Is specified engine oil not being used?A. Check and replace oil with specified type.

Q. Is thermostat faulty or clogged?A. Have serviced by a Yamaha dealer.

Q. Is air vent screw closed?A. Open the air vent screw.

Q. Is fuel pump damaged?A. Have serviced by a Yamaha dealer.

Q. Is fuel joint connection incorrect?A. Connect correctly.

Q. Is heat range of spark plug incorrect?


Trouble Recovery

48

A. Inspect spark plug and replace it with rec-ommended type.

Q. Is high pressure fuel pump drive belt bro-ken?A. Have serviced by a Yamaha dealer.

Q. Is engine not responding properly to shiftlever position?A. Have serviced by a Yamaha dealer.

Engine vibrates excessively.Q. Is propeller damaged?A. Have propeller repaired or replaced.

Q. Is propeller shaft damaged?A. Have serviced by a Yamaha dealer.

Q. Are weeds or other foreign matter tangledon propeller?A. Remove and clean propeller.

Q. Is motor mounting bolt loose?A. Tighten bolt.

Q. Is steering pivot loose or damaged?A. Tighten or have serviced by a Yamahadealer.

EMU29431

Temporary action in emergencyEMU29440

Impact damage

WARNINGEWM00870

The outboard motor can be seriously dam-aged by a collision while operating ortrailering. Damage could make the out-board motor unsafe to operate.

If the outboard motor hits an object in the wa-ter, follow the procedure below.

1. Stop the engine immediately.2. Inspect the control system and all compo-

nents for damage. Also inspect the boatfor damage.

3. Whether damage is found or not, returnto the nearest harbor slowly and careful-ly.

4. Have a Yamaha dealer inspect the out-board motor before operating it again.

EMU29531

Starter will not operateIf the starter mechanism does not operate(the engine cannot be cranked with the start-er), the engine can be started with an emer-gency starter rope.

WARNINGEWM01020

� Use this procedure only in an emergen-cy and only to return to port for repairs.

� When the emergency starter rope isused to start the engine, the start-in-gear protection device does not operate.Make sure the remote control lever is inneutral. Otherwise the boat could unex-pectedly start to move, which could re-sult in an accident.



Trouble Recovery

49

� Do not attach the lanyard to clothingthat could tear loose. Do not route thecord where it could become entangled,preventing it from functioning.

� Avoid accidentally pulling the lanyardduring normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power, theboat could slow rapidly. This couldcause people and objects in the boat tobe thrown forward.

� Be sure no one is standing behind youwhen pulling the starter rope. It couldwhip behind you and injure someone.

� An unguarded, rotating flywheel is verydangerous. Keep loose clothing andother objects away when starting the en-gine. Use the emergency starter ropeonly as instructed. Do not touch the fly-wheel or other moving parts when theengine is running. Do not install thestarter mechanism or top cowling afterthe engine is running.

� Do not touch the ignition coil, spark plugwire, spark plug cap, or other electricalcomponents when starting or operatingthe motor. You could get an electricalshock.

EMU29561

Emergency starting engine1. Remove the top cowling.2. Remove the start-in-gear protection ca-

ble from the starter, if equipped.3. Remove the starter/flywheel cover after

removing the bolt(s).

4. Prepare the engine for starting. For fur-ther information, see page 22. Be surethe engine is in neutral and that the en-gine stop switch lanyard lock plate is at-tached to the engine stop switch. Themain switch must be “ ” (on), ifequipped.

5. If equipped the choke knob, pull out itwhen the engine is cold. After the enginestarts, gradually return the choke knob toits home position as the engine warmsup.

6. Insert the knotted end of the emergencystarter rope into the notch in the flywheelrotor and wind the rope several turnsaround the flywheel clockwise.

7. Give a strong pull straight out to crankand start the engine. Repeat if neces-sary.


Trouble Recovery

50

EMU29760

Treatment of submerged motorIf the outboard motor is submerged, immedi-ately take it to a Yamaha dealer. Otherwisesome corrosion may begin almost immediate-ly.If you cannot immediately take the outboardmotor to a Yamaha dealer, follow the proce-dure below in order to minimize engine dam-age.EMU29771

Procedure1. Thoroughly wash away mud, salt, sea-

weed, and so on, with fresh water.

2. Remove the spark plugs and face thespark plug holes downward to allow anywater, mud, or contaminants to drain.

3. Drain the fuel from the carburetor, fuel fil-ter, and fuel line.

4. Feed fogging oil or engine oil through thecarburetor(s) and spark plug holes whilecranking with the manual starter or emer-gency starter rope.

5. Take the outboard motor to a Yamahadealer as soon as possible.

CAUTION:ECM00400

Do not attempt to run the outboard motoruntil it has been completely inspected.

ZMU01909

ZMU01910

ZMU01911


Consumer information

51

EMU29811

Important warranty information for U.S.A. and Canada



52



53

EMU29820

YAMAHA MOTOR CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY



54



55



56

EMU29840

IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE U.S.A. OR CANADA


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9.9D15D

OWNER’S MANUAL

LIT-18626-05-8263V-28199-17

April 2004–0.3 × 1 CRPrinted in Japan

Printed on recycled paper

YAMAHA MOTOR CORPORATION, USA U.S.A.Edition

9.9D, 15D Owner's Manual - Yamaha Motor Company · 15D OWNER’S MANUAL LIT-18626-05-82 ... maximum...

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Transcript of 9.9D, 15D Owner's Manual - Yamaha Motor Company · 15D OWNER’S MANUAL LIT-18626-05-82 ... maximum...