EMU25110 Yamaha. If you have any question about the operation or maintenance of your outboard motor, please consult a Yamaha dealer. In this Owner’s Manual particularly important...
Table of contents General information ......1 Trim tab with anode......20 Tilt support lever for power trim and Identification numbers record..1 tilt or hydro tilt model..... 21 Outboard motor serial number ..1 Top cowling lock lever Key number........1 (pull up type) .........
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Table of contents Preoperation checks ..... 40 Cleaning the outboard motor... 61 Fuel ..........40 Checking painted surface of Controls........... 40 motor..........61 Engine ..........40 Periodic maintenance ....61 Checking the engine oil level ..40 Replacement parts ......61 Filling fuel ........
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Table of contents Consumer information....84 Important warranty information for U.S.A. and Canada ..... 84 YAMAHA MOTOR CORPORATION, U.S.A. FOUR-STROKE OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTY ........ 86 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA ...... 88...
Record your outboard motor serial number in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in case your outboard motor is sto- len. 1. Key number...
General information particular label. ZMU04776 EMU25262 Manufactured date label EMU25280 This label is attached to the clamp bracket or One Star—Low Emission the swivel bracket. The one-star label identifies engines that meet the Air Resources Board’s 2001 ex- haust emission standards. Engines meeting these standards have 75% lower emissions than conventional carbureted two-stroke en- gines.
General information the outboard should be equal to or less than the rated horsepower capacity of the boat. If the rated horsepower capacity of the boat is unknown, consult the dealer or boat manufacturer. Do not modify the outboard. Modifications could make the motor unfit or unsafe to use.
Do not touch or remove electrical parts Never illegally discard (dump) the product. when starting or during operation. Yamaha recommends consulting the deal- Keep hands, hair, and clothes away er on discarding the product. from flywheel and other rotating parts Be informed about boating safety.
General information EMU25413 These rules determine which vessel has the Label (counter rotation models) right-of-way, and what each vessel should EWM01281 WARNING Stand-on vessel Use only a counterclockwise rotation The vessel with the right-of-way has the duty propeller with this engine. to continue its course and speed, except to Counterclockwise propellers are marked avoid an immediate collision.
General information sel head-on) Crossing When two power driven vessels are crossing Crossing: (you are traveling across the oth- each other’s path close enough to run the er vessel’s path) risk of collision, the vessel which has the oth- Overtaking: (you are passing or being er on the starboard (right) side must keep out passed by another vessel) of the way of the other.
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General information bend that may obstruct the view of other wa- er is going towards the port). This means that ter vessels, the operator should sound a pro- red buoys are passed on the starboard longed blast on the whistle (4 to 6 seconds). (right) side when proceeding from open wa- If another vessel is around the bend, it too ter into port, and black buoys are to port (left)
General information ZMU01708 EMU25540 away from sparks, flames, or other Fueling instructions sources of ignition. EWM00010 Stop engine before refueling. WARNING Refuel in a well-ventilated area. Refuel GASOLINE AND ITS VAPORS ARE HIGH- portable fuel tanks off the boat. LY FLAMMABLE AND EXPLOSIVE! Take care not to spill gasoline.
10% and CAUTION: the fuel meets minimum octane ratings. All 4-stroke engines are shipped from the Yamaha does not recommended gasohol factory without engine oil. containing methanol because it can cause fuel system damage or engine performance...
For instructions on propeller removal and in- stallation, see page 69. EMU25770 Start-in-gear protection Yamaha outboard motors or Yamaha-ap- proved remote control units are equipped with start-in-gear protection device(s). This feature permits the engine to be started only when it is in neutral. Always select neutral...
Basic components EMU25799 Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. F115, LF115 ZMU04773 1. Top cowling 15. Tachometer* 2. Top cowling lock lever(s) 16. Trim meter* 3.
Basic components ZMU05429 1. Tachometer unit (Square type)* 2. Tachometer unit (Round type)* 3. Speedometer unit (Square type)* 4. Speed & fuel meter unit (Square type)* 5. Speed & fuel meter unit (Round type)* 6. Fuel management meter (Square type)* EMU26180 Remote control The remote control lever actuates both the...
Basic components used when the remote control lever is in NOTE: the neutral position. The neutral throttle lever will operate only After the button is pushed, the throttle be- when the remote control lever is in neutral. gins to open after the remote control lever The remote control lever will operate only is moved at least 35°.
Basic components 1. Throttle indicator 1. Forward “ ” 2. Neutral “ ” EMU25971 3. Reverse “ ” Throttle friction adjuster A friction device provides adjustable resis- EMU25941 tance to movement of the throttle grip or the Throttle grip remote control lever, and can be set accord- The throttle grip is on the tiller handle.
Basic components lanyard where it could become entan- gled, preventing it from functioning. Avoid accidentally pulling the lanyard during normal operation. Loss of en- gine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be thrown forward.
Basic components gine. When the key is released, it returns automatically to the “ ” (on) position. 1. Lanyard 2. Lock plate EMU26001 Engine stop button START START To open the ignition circuit and stop the en- gine, push this button. ZMU04566 EMU26090 Main switch...
Basic components To decrease resistance, turn the lever to the starboard side “B”. EWM00040 WARNING Do not overtighten the friction adjuster. If there is too much resistance, it could be difficult to steer, which could result in an accident. ZMU03591 NOTE: Check the tiller handle for smooth move- ment when the lever is turned to the star-...
Basic components current position. EWM01030 WARNING Use the power trim and tilt switch located on the bottom engine cowling only when the boat is at a complete stop with the en- gine off. Attempting to use this switch while the boat is moving could increase the risk of falling overboard and could ZMU04601 distract the operator, increasing the risk...
Basic components protect the engine from electrochemical corrosion. Never paint the trim tab as it will become ineffective as an anode. ZMU03979 1. Tilt support lever ZMU02525 EMU26382 Top cowling lock lever (pull up type) 1. Trim tab To remove the engine top cowling, pull up 2.
If the warning system has activated, stop hose and tap water. the engine and consult a Yamaha dealer NOTE: immediately. For details on usage, see page 60.
Basic components tarily after the main switch is turned on and mation, see page 40. will return to normal thereafter. ZMU04754 ZMU04185 EMU26522 Low oil pressure warning indicator 1. Tachometer If oil pressure drops too low, the warning in- 2. Trim meter dicator will start to blink.
Basic components EMU26572 Overheat warning indicator If the engine temperature rises too high, this indicator will flash. For further information on reading the indicator, see page 36. ECM00050 CAUTION: Do not continue to run the engine if the overheat warning indicator is on. Serious engine damage will occur.
Basic components ting the selector switch on the back of the NOTE: gauge. See the illustration for settings. Memorize the trim angles that work best for your boat under different conditions. Adjust the trim angle to the desired using the power trim and tilt switch. If the trim angle of your motor exceeds the trim operating range, the top segment on the trim meter display will blink.
ECM00860 NOTE: CAUTION: The trip distance is shown in kilometers or The Yamaha fuel tank sensor differs from miles depending upon the unit of measure- conventional sensors. Incorrectly setting ment selected for the speedometer. the selector switch on the gauge will give The trip distance is kept in memory by bat- false readings.
ECM00870 CAUTION: Get back to the port soon if a warning de- vice has activated. For charging the bat- tery, consult your Yamaha dealer. ZMU01745 EMU26720 Fuel warning indicator If the fuel level decreases to one segment, the fuel level warning segment will begin to blink.
Basic components segments of the display come on as a test. ment by setting the selector switch on the After a few seconds, the gauge will change back of the gauge during installation. to normal operation. Watch the gauge when turning on the main switch to make sure all segments come on.
(winter or summer fuel and amount of additives). The Yamaha digital speedometer and fuel management meter calculates speed, miles traveled, and fuel economy by water movement at the stern of the boat. This...
8. Oil pressure (4-stroke models) connected to the unit, cooling water pressure display will be available. For the optional sensor, consult your Yamaha dealer. The ta- chometer unit is available in round or square types. Check your tachometer unit type.
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If the buzzer sounds and the wa- ter separator warning indicator blinks, con- sult your Yamaha dealer immediately. NOTE: ZMU05417 To stop the buzzer, press the “...
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Do not continue to operate the engine if your Yamaha dealer. a warning device has activated. Con- sult your Yamaha dealer if the problem ECM01600 CAUTION: cannot be located and corrected. Do not continue to run the engine if the...
Basic components soon and consult a Yamaha dealer immedi- ately. ZMU05427 ZMU05425 ZMU05428 EMU31610 Speed & fuel meter unit ZMU05426 This unit shows the boat speed and has the ECM00920 functions of fuel meter, total fuel consump- CAUTION: tion display, fuel economy display, fuel flow In such an event, the engine will not oper- display, and system voltage display.
If optional sensors are connected to the unit, trip display, water surface tempera- ture display, depth display, and clock will be available. For the optional sensor, consult your Yamaha dealer. ZMU05434 1. Set button 2. Mode button...
Basic components EMU31630 Fuel management meter This meter has functions of fuel flow meter, total consumption display, fuel economy dis- play, and remaining fuel display. ZMU05436 1. Set button 2. Mode button ZMU05438 1. Set button 2. Mode button ZMU05437 1.
Warning system ECM00090 CAUTION: Do not continue to operate the engine if a warning device has activated. Consult your Yamaha dealer if the problem can- not be located and corrected. ZMU03025 EMU30341 Overheat warning (twin engines) This engine has an overheat warning device.
Check light or blink. the oil level and add oil as needed. If the oil level is correct, consult your Yamaha dealer. ECM00100 CAUTION: Do not continue to run the engine if the low oil pressure warning indicator is on.
Operation EMU26901 specific boat and motor combination. Installation EWM00830 ECM00110 WARNING CAUTION: Improper mounting of the outboard mo- Incorrect engine height or obstructions tor could result in hazardous conditions to smooth water flow (such as the design such as poor handling, loss of control, or or condition of the boat, or accessories fire hazards.
Test runs at different heights can help deter- mine the optimum mounting height. Con- sult your Yamaha dealer boat manufacturer for further information on de- termining the proper mounting height. For instructions on setting the trim angle of the outboard motor, see page 48.
Fill with oil if it is below Check fuel line connections to be sure they the lower mark, or drain to the specified are tight (if equipped Yamaha fuel tank or level if it is above the upper mark. boat tank).
Yamaha recommends the use of 1. Lower level mark Ring Free Fuel Additive, available from 2. Oil dipstick your Yamaha dealer. Ring Free Fuel Addi- 3. Upper level mark tive has repeatedly proven its ability to clean combustion deposits from inside the engine,...
Operation and drowsiness. Keep cockpit and cab- tral. in areas well ventilated. Avoid blocking Attach the engine stop switch lanyard to exhaust outlets. a secure place on your clothing, or your If there is an air vent screw on the fuel arm or leg.
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Operation NOTE: When the engine is cold, it needs to be warmed up. For further information, see page 45. If the engine is warm and fails to start, open the throttle slightly and try to start the engine again. If the engine still fails to start, see page 75.
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Operation gine stop switch. turned on, the buzzer operates for a few sec- onds then stops automatically. The buzzer EWM00120 WARNING also operates if one of the engines stalls. Attach the engine stop switch lanyard Turn the main switch to “ ”...
Consult versa, first close the throttle so that the your Yamaha dealer if the cause for the engine idles (or runs at low speeds). low oil pressure warning indicator can- EMU27764 not be found.
Operation firmly from neutral to forward. EMU27785 Reverse (automatic reverse lock and power trim and tilt models) EWM00190 WARNING When operating in reverse, go slowly. Do not open the throttle more than half. Oth- erwise the boat could become unstable, which could result in loss of control and an accident.
Operation ZMU04600 ZMU04598 EMU27820 Stopping engine Before stopping the engine, first let it cool off for a few minutes at idle or low speed. Stop- ping the engine immediately after operating at high speed is not recommended. EMU27844 Procedure Push and hold the engine stop button or turn the main switch to “...
Operation switch to “ ” (off). EMU27861 Trimming outboard motor The trim angle of the outboard motor helps determine the position of the bow of the boat in the water. Correct trim angle will help im- prove performance and fuel economy while reducing strain on the engine.
Operation switch while the boat is moving. Adjust the outboard motor trim angle using the power trim and tilt switch. 1. Power trim and tilt switch To raise the bow (trim-out), press the switch “ ” (up). 1. Power trim and tilt switch To lower the bow (trim-in), press the switch “...
Operation Bow Up NOTE: Too much trim-out puts the bow of the boat Depending on the type of boat, the outboard too high in the water. Performance and econ- motor trim angle may have little effect on the omy are decreased because the hull of the trim of the boat when operating.
Operation on page 47. Never tilt the outboard mo- Disconnect the fuel line from the out- tor while the engine is running. Severe board motor or close the fuel cock. damage from overheating can result. Press the power trim and tilt switch / Do not tilt up the engine by pushing the power tilt switch “...
Operation from marine growth and corrosion which could damage the power trim and tilt mechanism. Push the tilt support knob into the clamp bracket or pull the tilt support lever to- ZMU03452 ward you to support the engine. EMU28055 Procedure for tilting down (power trim and tilt models / power tilt models) Push the power trim and tilt switch / pow-...
Operation EMU28060 Cruising in shallow water The outboard motor can be tilted up partially to allow operation in shallow water. EMU28090 Power trim and tilt models / power tilt models The outboard motor can be tilted up partially to allow operation in shallow water. ZMU01936 EWM00660 WARNING...
Operation ZMU04588 ZMU04602 ZMU04235 Slightly tilt the outboard motor up to the desired position using the power trim and tilt switch / power tilt switch. To return the outboard motor to the nor- mal running position, press the power ZMU01935 trim and tilt switch / power tilt switch and slowly tilt the outboard motor down.
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For cooling system flushing instructions, see page 57. Cruising in turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (not available for some models) if you use the outboard motor in turbid or muddy water...
Maintenance Bore × stroke: EMU31480 Specifications 79.0 × 88.8 mm (3.11 × 3.50 in) NOTE: Ignition system: “(AL)” stated in the specification data below Spark plug (NGK): represents the numerical value for the alumi- LFR6A-11 num propeller installed. Spark plug gap: Likewise, “(SUS)”...
Engine oil drain bolt: sition using a motor support device such as 28.0 Nm (20.7 ft-lb) (2.86 kgf-m) a transom saver bar. Consult your Yamaha Engine oil filter: dealer for further details. 18.0 Nm (13.3 ft-lb) (1.84 kgf-m)
NOTE: mandatory to prevent excessive engine The use of “Yamaha Fuel Conditioner and damage due to rust. Perform the flush- ing and fogging at the same time. Stabilizer” eliminates the need to drain the fuel system.
Seal replacement should be performed Antidote (INTERNAL): by an authorized Yamaha dealer prior to Drink large quantities of water or milk use. followed by milk of magnesia, beaten Grease all grease fittings.
Maintenance Keep batteries away from fire, sparks, or open flames (for example: welding equipment, lighted cigarettes, and so on.) DO NOT SMOKE when charging or han- dling batteries. KEEP BATTERIES AND ELECTROLYTIC FLUID OUT OF REACH OF CHILDREN. Batteries vary among manufacturers. There- fore the following procedures may not al- ways apply.
When flushing the engine with the boat in iar with machine servicing, this work the water, tilting up the outboard motor un- should be done by your Yamaha dealer or til it is completely out of the water will other qualified mechanic.
When operating in salt water, turbid or muddy water, the engine should be flushed with clean water after each use. The “ ” symbol indicates the check-ups which you may carry out yourself. The “ ” symbol indicates work to be carried out by your Yamaha dealer. Initial Every 50 hours Item...
Maintenance EMU28931 Greasing Yamaha marine grease (Water resistant grease) F115, LF115 ZMU04266 attempt to diagnose any problems yourself. EMU28952 Cleaning and adjusting spark plug Instead, take the outboard motor to a EWM00560 Yamaha dealer. You should periodically re- WARNING move and inspect the spark plug because...
1. Spark plug gap Check the fuel lines for leaks, crack, or mal- 2. Spark plug I.D. mark (NGK) function. If a problem is found, your Yamaha 3. Spark plug part number dealer or other qualified mechanic should re- pair it immediately.
(not tilted). higher than normal. If you have difficulty ver- ifying the idle speed, or the idle speed re- quires adjustment, consult a Yamaha dealer or other qualified mechanic. Verify whether the idle speed is set to specification. For idle speed specifica- tions, see page 56.
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Consult NOTE: your Yamaha dealer if the problem can- If a torque wrench is not available when you not be located and corrected. are installing the drain screw, finger tighten Turn off the engine and wait 3 minutes.
EMU29140 Engine oil leakage Check for oil leaks on the around the engine. NOTE: ZMU02058 If any leaks are found, consult your Yamaha dealer. Dispose of used oil according to local EMU29153 regulations. Checking power trim and tilt system...
Maintenance NOTE: 2. Trim rods 3. Tilt support lever Consult your Yamaha dealer if any operation is abnormal. Use the tilt support lever to lock the mo- EMU29171 tor in the up position. Operate the tilt Checking propeller down switch briefly so the motor is sup- EWM00321 ported by the tilt support lever.
Maintenance EMU30660 Removing the propeller EMU29194 Spline models Straighten the cotter pin and pull it out using a pair of pliers. Remove the propeller nut, washer, and spacer (if equipped). ZMU01897 Checkpoints Check each of the propeller blades for wear, erosion from cavitation or ventila- tion, or other damage.
Severe injury could eration and be lost. occur if the outboard motor accidental- ly falls. Apply Yamaha marine grease or a cor- rosion resistant grease to the propeller Tilt the outboard motor so that the gear shaft.
Remove scales into the gear case which can cause gear from the surfaces of the anodes. Consult a damage. Consult a Yamaha dealer for re- Yamaha dealer for replacement of external pair of the lower unit seals.
(for example: welding charge the battery when it is low. equipment, lighted cigarettes, and so NOTE: on.) Consult a Yamaha dealer when charging or DO NOT SMOKE when charging or han- re-charging batteries. dling batteries. KEEP BATTERIES AND ELECTROLYTIC EMU29331 FLUID OUT OF REACH OF CHILDREN.
Check the fitting of the top cowling by push- ECM01121 ing it with both hands. If it is loose have it re- CAUTION: paired by your Yamaha dealer. Make sure the main switch (on applica- ble models) is “ ” (off) before work- ing on the battery.
Q. Has fuel pump malfunctioned? If your outboard motor requires repair, bring A. Have serviced by a Yamaha dealer. it to your Yamaha dealer. If the engine trouble warning indicator is Q. Are spark plug(s) fouled or of incorrect flashing, consult your Yamaha dealer.
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Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel. Q. Is carburetor clogged? A. Have serviced by a Yamaha dealer. Q. Is fuel filter clogged? A. Clean or replace filter. Q. Is fuel joint connection incorrect? A.
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Trouble Recovery A. Have serviced by a Yamaha dealer. Q. Are weeds or other foreign matter tangled on gear housing? Q. Is load on boat improperly distributed? A. Remove foreign matter and clean lower A. Distribute load to place boat on an even unit.
ECM00370 Q. Is steering pivot loose or damaged? CAUTION: A. Tighten or have serviced by a Yamaha If the boat is operated with one engine in dealer. the water but not running, water may run...
3. Fuse (20 A × 2, 30 A × 2) NOTE: 4. Spare fuse (20 A, 30 A) Consult your Yamaha dealer if the new fuse 5. Fuse puller immediately blows again. ZMU04280 1.
Trouble Recovery the power trim and tilt / the power tilt because which could result in a fire or explosion of a discharged battery or a failure with the hazard. power trim and tilt unit / the power tilt unit, the If the water separator warning indicator on engine can be tilted manually.
Be careful not to twist the water detection water separator warning indicator re- switch lead when unscrewing the filter cup. mains off. NOTE: Have a Yamaha dealer inspect the outboard motor after returning to port. EMU29541 Starter will not operate If the starter mechanism does not operate...
Trouble Recovery power, the boat could slow rapidly. This gine stop switch lanyard lock plate is at- could cause people and objects in the tached to the engine stop switch. The boat to be thrown forward. main switch must be “ ”...
ZMU04272 EMU29760 Treatment of submerged motor If the outboard motor is submerged, immedi- ately take it to a Yamaha dealer. Otherwise some corrosion may begin almost immedi- ately. If you cannot immediately take the outboard motor to a Yamaha dealer, follow the proce- dure below in order to minimize engine dam- age.
Consumer information EMU29841 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA...
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Printed in Japan April 2006–2.1 × 1 ! Printed on recycled paper...
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(A l’usage du concessionnaire) MODÉLE ET NO. DE SÉRIE DU MOTEUR HORS-BORD (sur l’étiquette d’identification de la presse de fixation) YAMAHA DEALER NUMBER NO. DU CONCESSIONNAIRE YAMAHA DEALER NAME YAMAHA MOTOR CO., LTD. NOM DU MADE IN JAPAN CONCESSIONNAIRE PAYS D'ORIGINE JAPON USAGE...
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PLACE POSTAGE HERE ATTN: WARRANTY DEPARTMENT...