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EMU25051 Read this owner’s manual carefully before operating or working on your outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.
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Yamaha. If you have any question about the Some countries have laws or regulations re- operation or maintenance of your outboard stricting users from taking the product out of motor, please consult a Yamaha dealer.
Table of contents General information ......1 Main components ......14 Digital electronic control ....16 Identification numbers record..1 Digital electronic control-active Outboard motor serial number ..1 indicator ........17 Digital electronic control serial Digital electronic control-warning number..........1 indicator ........
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Table of contents Priming fuel system......37 Checking power trim and tilt Starting engine ........ 37 system........... 63 Warming up engine ....... 39 Checking propeller ......64 Shifting .......... 39 Removing propeller ......65 Stopping boat ........ 40 Installing propeller ......65 Stopping engine ......
Outboard motor serial number NOTE: The outboard motor serial number is Consult your Yamaha dealer if you have any stamped on the label attached to the port questions concerning the digital electronic side of the clamp bracket.
General information ZMU05943 EMU25190 1. EC label location Key number If a main key switch is equipped with the mo- tor, the key identification number is stamped on your key as shown in the illustration. Record this number in the space provided for reference in case you need a new key.
Read any manuals supplied with the boat. Read all labels on the outboard motor and the boat. If you need any additional information, contact your Yamaha dealer. EMU33831 Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements. F350A ZMU05942...
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General information 6K1-83823-41 ZMU05707 stops if you accidentally leave the EMU34641 Contents of labels helm, which could prevent a runaway The above warning labels mean as follows. boat. EWM01681 WARNING EWM01282 WARNING Keep hands, hair, and clothing away Use only a counterclockwise rotation from rotating parts while the engine is propeller with this engine.
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General information EMU33850 Hazard caused by continuous rotation Other labels ZMU05664 ZMU05711 Electrical hazard EMU35130 Symbols The following symbols mean as follows. Caution/Warning ZMU05696 ZMU05666 Read Operator’s Manual ZMU05665...
Safety information EMU33621 Severe injury could occur if the outboard mo- Safety information tor accidentally falls. Observe these precautions at all times. EMU33670 Engine shut-off cord EMU33630 Rotating parts Attach the engine shut-off cord so that the Hands, feet, hair, jewelry, clothing, PFD engine stops if the operator falls overboard straps, etc.
Have an approved personal flotation device tions. Overloading or incorrect weight (PFD) on board for every occupant. Yamaha distribution can compromise the boats han- recommends that you must wear a PFD dling and lead to an accident, capsizing or whenever boating.
Safety information Avoid sharp turns or other maneuvers that make it hard for others to avoid you or un- derstand where you are going. Avoid areas with submerged objects or shallow water. Ride within your limits and avoid aggres- sive maneuvers to reduce the risk of loss of control, ejection, and collision.
Basic requirements EMU25540 EMU30910 Fueling instructions Gasoline EWM00010 Recommended gasoline: WARNING Premium unleaded gasoline with a GASOLINE AND ITS VAPORS ARE HIGH- minimum octane rating of 94 (Re- LY FLAMMABLE AND EXPLOSIVE! search Octane Number). Do not smoke when refueling, and keep away from sparks, flames, or other EMU35530 sources of ignition.
Before installing the outboard motor(s), con- continue using the outboard. Contact firm that the total horsepower of your mo- your Yamaha dealer. tor(s) does not exceed the boats maximum This digital electronic control unit is only horsepower rating. See the boats capacity available for the outboard motor which you plate or contact the manufacturer.
If the ECM (Electronic control module) of Your Yamaha dealer can help you select the the digital electronic control unit is re- right propeller for your boating needs. Select placed a propeller that will allow the engine to reach Consult your Yamaha dealer for setting.
Basic requirements EMU35140 Start-in-gear protection Yamaha outboard motors or Yamaha-ap- proved digital electronic control units are equipped with start-in-gear protection de- vice(s). This feature permits the engine to be started only when it is in neutral. Always se- lect neutral before starting the engine.
Basic components EMU2579D Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. F350A, FL350A ZMU05813 1. Top cowling 2. Anti-cavitation plate 3. Propeller* 4. Cooling water inlet 5.
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Basic components ZMU05938 1. Digital electronic control (single type)* 2. Switch panel (for use with single type)* 3. Digital electronic control (twin type)* 4. Switch panel (for use with twin type)* 5. Clip 6. Engine shut-off switch...
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)* EMU34960 Digital electronic control The digital electronic control actuates the...
The digital electronic control-warning indica- system is in the operating state. tor lights when trouble occurs in the connec- tion between the digital electronic control and outboard motor. Consult your Yamaha dealer for details. ZMU05888 1. Digital electronic control-active indicator ZMU05889 1.
Basic components 7. Fully open EMU35001 Free throttle switch In neutral, keep this switch pressed, move the control lever forward, and release the switch after the digital electronic control-ac- tive indicator starts blinking. While the indi- cator blinks, you can open or close the throttle.
Basic components EMU35250 Throttle friction adjuster A friction device provides adjustable resis- tance to movement of the control lever, and can be set according to operator preference. To increase resistance, turn the adjuster clockwise. To decrease resistance, turn the adjuster counterclockwise. EWM01770 WARNING ZMU05882...
Basic components EMU25991 2. Clip Engine shut-off switch 3. Engine shut-off switch The clip must be attached to the engine shut- off switch for the engine to run. The cord should be attached to a secure place on the operator’s clothing, or arm or leg. Should the START START operator fall overboard or leave the helm, the...
Basic components START ZMU04567 ZMU05822 EMU26152 Power trim and tilt switch on bottom engine cowling The power trim and tilt switch is located on START START the side of the bottom engine cowling. Press- ing the switch “ ” (up) trims the outboard motor up, and then tilts it up.
41 and 43. EMU35040 Tilt limiter This outboard motor is equipped with a tilt limiter that controls the tilt range. NOTE: Consult your Yamaha dealer about changing the setting. EMU35030 ZMU05823 Tilt support lever for power trim and tilt model...
Basic components ered in the normal running position, use an additional support device to secure it in the tilt position. EMU35050 Top cowling lock lever (turn type) To remove the top cowling, turn the front and side lock levers to release them and lift off the cowling.
The buzzer will sound intermittently only when the gear shift is in neutral. If the warning system has activated, stop the engine and consult a Yamaha dealer immediately. EMU31652 6Y8 Multifunction meters Multifunction meters have 6 kinds of meter units;...
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Basic components ZMU05415 ZMU05417 1. Set button 1. Set button 2. Mode button 2. Mode button 4 5 2 ZMU05416 ZMU05418 1. Tachometer 1. Tachometer 2. Trim meter 2. Trim meter 3. Multifunction display 3. Multifunction display 4. Cooling water pressure 4.
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If the buzzer sounds and the water sep- When the engine oil pressure drops too low, arator-warning indicator blinks, consult your the low oil pressure-warning indicator will Yamaha dealer immediately. start to blink, and the engine speed will auto- NOTE: matically decrease to about 2000 r/min.
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Gasoline mixed with water could cause a warning device has activated. Con- damage to the engine. sult your Yamaha dealer if the problem Engine trouble warning cannot be located and corrected. This indicator will blink if the engine or the...
Basic components communication trouble between the digital electronic control and the outboard motor oc- curs while cruising. Get back to the port soon and consult a Yamaha dealer immediately. ZMU05427 ZMU05425 ZMU05428 EMU35470 Speed & fuel meter unit This unit shows the boat speed. To display...
If optional sensors are connected to the unit, ZMU05434 trip display, water surface temperature dis- play, depth display, and clock will be avail- 1. Set button able. For the optional sensor, consult your 2. Mode button Yamaha dealer.
Basic components EMU31631 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. ZMU05891 EMU35180 1. Digital electronic control-warning indicator Digital electronic control warning...
Basic components ZMU05826 ZMU05422 The buzzer will sound. NOTE: Twin engine drive users: Should the overheat warning system of one engine activate, the engine will slow down and the buzzer will sound. This will cause the other engine to slow down. To switch off the warning activation on the engine not affected by overheating, turn off the main switch of the engine overheating.
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Basic components pressure too low. ECM00101 CAUTION: Do not continue to run the engine if the low oil pressure-warning indicator is on. Serious engine damage could occur. ZMU05431 The buzzer will sound. ZMU04583 START START ZMU05827 NOTE: Twin engine drive users: Should the low oil pressure warning system of one engine activate, the engine will slow down and the buzzer will sound.
Consult your engine overheating. If the engine is mounted Yamaha dealer or boat manufacturer for fur- too low, water resistance (drag) will in- ther information on determining the proper crease, thereby reducing engine efficiency mounting location.
Your new engine requires a period of break- ent heights can help determine the optimum in to allow mating surfaces of moving parts to mounting height. Consult your Yamaha deal- wear in evenly. Correct break-in will help en- er or boat manufacturer for further informa-...
Place the if it is above the measuring area. Consult control lever in neutral and turn the main your Yamaha dealer for filling or draining switch to “ ”(on). If the buzzer sounds the oil.
Operation ZMU05918 1. Arrow 1. Oil dipstick 2. Lower level EMU27491 3. Upper level Starting engine EWM01600 NOTE: WARNING Be sure to completely insert the dipstick into Before starting the engine, make sure the dipstick guide. that the boat is tightly moored and that EMU30021 you can steer clear of any obstructions.
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Operation or leg. Then install the clip on the other NOTE: end of the cord into the engine shut-off Twin engine users: When the main switch is switch. turned on, the buzzer operates for a few sec- EWM00121 onds then stops automatically. The buzzer WARNING also operates if one of the engines stalls.
(for reverse gear) 22.5° (a detent can ous damage could occur. Stop the felt). engine and check whether the cooling water inlet on the lower case or the cooling water pilot hole is blocked. Consult your Yamaha dealer if the prob-...
Operation EMU31742 22.5 Stopping boat 22.5 EWM01510 WARNING Do not use the reverse function to slow down or stop the boat as it could cause you to lose control, be ejected, or im- pact the steering wheel or other parts of the boat.
Operation ZMU05833 Remove the key if the boat will be left 1. Trim operating angle unattended. EMU27883 NOTE: Adjusting trim angle (Power trim and The engine can also be stopped by pulling tilt) the cord and removing the clip from the en- EWM00752 gine shut-off switch, then turning the main WARNING...
Operation angles to find the position that works best for your boat and operating conditions. EMU27911 Adjusting boat trim When the boat is on plane, a bow-up attitude results in less drag, greater stability and effi- ciency. This is generally when the keel line of the boat is up about 3 to 5 degrees.
Operation duce salt corrosion. EWM01541 WARNING Be sure all people are clear of the out- board motor when tilting up and down. Body parts can be crushed between the motor and the clamp bracket when the motor is trimmed or tilted. ECM00991 CAUTION: Bow Down...
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Operation up completely. ZMU05837 ZMU05824 EWM00261 ZMU05838 WARNING After tilting the outboard motor, be sure to support it with the tilt support knob or tilt support lever. Otherwise the outboard motor could fall back down suddenly if oil in the power trim and tilt unit or in the power tilt unit loses pressure.
Operation and tilt switch “ ” (down) to retract the trim rods. ECM00250 CAUTION: Be sure to retract the trim rods complete- ly during mooring. This protects the rods from marine growth and corrosion which could damage the power trim and tilt mechanism.
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Operation setting up for shallow water cruising. Return the outboard motor to its normal position as soon as the boat is back in deeper water. ECM01490 CAUTION: If the engine speed is suddenly in- creased when the outboard motor is partially tilted up, the power trim and tilt unit could be damaged.
Operation To return the outboard motor to the nor- mal running position, press the power trim and tilt switch and slowly tilt the out- board motor down. EMU35390 Cruising in other conditions Cruising in salt water After operating in salt water, flush the cooling water passages with fresh water to prevent them from becoming clogged.
Maintenance EMU34520 Engine: Specifications Type: NOTE: 4-stroke V Displacement: “(AL)” stated in the specification data below 5330.0 cm represents the numerical value for the alumi- Bore × stroke: num propeller installed. 94.0 × 96.0 mm (3.70 × 3.78 in) Likewise, “(SUS)” represents the value for Ignition system: stainless steel propeller installed and “(PL)”...
FL350AET 1310.0 cm (44.29 US oz) sition using a motor support device such as (46.20 Imp.oz) a transom saver bar. Consult your Yamaha Tightening torque for engine: dealer for further details. Spark plug: EMU35580 28.0 Nm (20.7 ft-lb) (2.86 kgf-m)
Change the gear oil. For instructions, see page 66. Inspect the oil for the pres- 1. Vapor separator ence of water that indicates a leaky seal. 2. Drain screw Seal replacement should be performed 3. Cap by an authorized Yamaha dealer prior to...
Grease all grease fittings. For further de- tails, see page 57. NOTE: For long-term storage, fogging the engine with oil is recommended. Contact your Yamaha dealer for information about fogging oil and procedures for your engine. EMU28442 Flushing power unit Perform this procedure right after operation for the most thorough flushing.
When flushing the engine with the boat in chine servicing, this work should be done the water, tilting up the outboard motor un- by your Yamaha dealer or other qualified til it is completely out of the water will mechanic.
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Maintenance these above conditions require more fre- quent maintenance. Yamaha recommends that you do this service twice as often as specified in the maintenance chart. For ex- ample, if a particular service should be done at 50 hours, do it instead at 25 hours. This will help prevent more rapid deterioration of engine components.
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 20 hours Item...
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Maintenance Initial Every 20 hours Item Actions hours (1 hours (3 hours (5 months) year) years) years) Engine Oil filter (car- Replacement tridge) Fuel filter (can be dis- Inspection or replace- assembled) ment as necessary Fuel filter (vapor sepa- Replacement rator tank) Inspection or replace- Fuel pump...
Do not attempt to diagnose any of both port and starboard sides. problems yourself. Instead, take the out- board motor to a Yamaha dealer. You should periodically remove and inspect the spark plug because heat and deposits will cause the spark plug to slowly break down and erode.
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Maintenance other of the correct type. Standard spark plug: LFR6A-11 Before fitting the spark plug, measure the electrode gap with a wire thickness gauge; adjust the gap to specification if necessary. ZMU05902 1. Spark plug gap ZMU05904 2. Spark plug I.D. mark (NGK) Remove the bolts that are securing the 3.
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Maintenance bolts. Bolt tightening torque: 9 Nm (6.6 ft-lb) (0.9 kgf-m) 10. Fasten the plate and install the bolts. ZMU05900 Bolt tightening torque: 8.0 Nm (5.8 ft-lb) (0.8 kgf-m) 13. Be sure to fit the 4 positions during in- ZMU05902 stallation.
Improper repairs can make the outboard unsafe to operate. Check the fuel lines for leaks, crack, or mal- function. If a problem is found, your Yamaha dealer or other qualified mechanic should re- pair it immediately.
100 hours or at 1-year intervals there- after. Otherwise the engine will wear quickly. ZMU05860 NOTE: Consult your Yamaha dealer for replace- Checkpoints ment of the engine oil filter and change of the Fuel system parts leakage engine oil.
Check for oil leaks on the around the engine. down switch briefly so the motor is sup- NOTE: ported by the tilt support lever. If any leaks are found, consult your Yamaha dealer. EMU35240 Checking power trim and tilt system...
Activate the trim-up switch until the tilt rod is fully extended. Unlock the tilt sup- port lever. Tilt the outboard motor down. Check that the tilt rod and trim rods operate smoothly. NOTE: Consult your Yamaha dealer if any operation is abnormal. ZMU05906...
Maintenance Checkpoints 1. Cotter pin Check each of the propeller blades for 2. Propeller nut wear, erosion from cavitation or ventila- 3. Washer 4. Spacer tion, or other damage. 5. Propeller Check the propeller shaft for damage. 6. Thrust washer Check the splines for wear or damage.
Maintenance 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. oil drain screw is at the lowest point pos- Install the thrust washer and propeller sible.
Inspect the used oil after it has been drained. If the oil is milky, water is getting into the gear case which can cause gear damage. Consult a Yamaha dealer for re- pair of the lower unit seals. NOTE: For disposal of used oil, consult your Yamaha dealer.
Maintenance Yamaha dealer for replacement of external anodes. ECM00720 CAUTION: Do not paint anodes, as this would render them ineffective. NOTE: Inspect ground leads attached to external anodes on equipped models. Consult a Yamaha dealer for inspection and replace- ment of internal anodes attached to the pow- er unit.
(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. EMU35600 KEEP BATTERIES AND ELECTROLYTIC Connecting the battery FLUID OUT OF REACH OF CHILDREN.
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2. Black cable 3. Battery Connecting an accessory battery (optional) If connecting an accessory battery, consult your Yamaha dealer about correct wiring. It is recommendable to install the fuse to the ZMU05939 isolator lead as shown in the illustration. For the fuse size, be sure to follow local regula- 1.
Check the fitting of the top cowling by push- ing it with both hands. If the top cowling is loose, reinstall the cowling. If the top cowling is still loose after reinstalling it, have it re- paired by your Yamaha dealer. ZMU05940 EMU29400 Coating the boat bottom A clean hull improves boat performance.
Therefore some items may not apply to your model. 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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Q. Is fuel system obstructed? Q. Is water pump or thermostat faulty? A. Check for pinched or kinked fuel line or A. Have serviced by a Yamaha dealer. other obstructions in fuel system. Q. Is there excess water in fuel filter cup? Q.
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. Spare fuse (10 A, 15 A, 20 A, 30 A, 80 A) NOTE: Consult your Yamaha dealer if the new fuse immediately blows again. ZMU05875 1. Fuel feed pump fuse (10 A) 2.
If the engine cannot be tilted up or down with the power trim and tilt because of a dis- charged battery or a failure with the power trim and tilt unit, consult your Yamaha deal- 1. Water separator-warning indicator EMU35610 Stop the engine.
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Trouble Recovery ZMU05895 Unscrew the filter cup from the filter housing. NOTE: Be careful not to twist the water detection switch lead when unscrewing the filter cup. ZMU05892 Disconnect the water detection switch coupler. ECM01570 CAUTION: Be careful not to get any water on the wa- ZMU05896 ter detection switch coupler, otherwise a malfunction could occur.
EMU33500 Treatment of submerged motor ZMU05895 If the outboard motor is submerged, immedi- ately take it to a Yamaha dealer. Otherwise Bolt tightening torque: some corrosion may begin almost immedi- 8.0 Nm (5.8 ft-lb) (0.8 kgf-m) ately.
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YAMAHA MOTOR CO., LTD. Printed in Japan April 2007–0.1 × 1 ! Printed on recycled paper...
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