Yamaha F300A Owner's Manual
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Yamaha F300A Owner's Manual

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F300A
FL300A
F350A
FL350A
OWNER'S MANUAL
Read this manual carefully before operating this
outboard motor.
6AW-28199-25-E0

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Summary of Contents for Yamaha F300A

  • Page 1 F300A FL300A F350A FL350A OWNER’S MANUAL Read this manual carefully before operating this outboard motor. 6AW-28199-25-E0...
  • Page 2 EMU25052 Read this manual carefully before operating this outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.

  • Page 3: Important Manual Information

    Any damage tain maximum enjoyment from your new resulting from neglect of these instructions is Yamaha. If you have any question about the not covered by warranty. operation or maintenance of your outboard Some countries have laws or regulations re- motor, please consult a Yamaha dealer.

  • Page 4: Table Of Contents

    Table of contents Safety information......1 Propeller selection ......12 Counter rotation models....13 Outboard motor safety ..... 1 Start-in-gear protection ....13 Propeller..........1 Engine oil requirements ....13 Rotating parts........1 Fuel requirements ......14 Hot parts ........... 1 Gasoline ..........
  • Page 5 Table of contents Low oil pressure-alert...... 37 Change of station ......55 Water separator alert ...... 37 Starting engine ........ 55 Low battery voltage-alert....38 Checks after starting engine ..60 Engine trouble alert ......38 Cooling water ........60 6Y8 Multifunction meters....
  • Page 6 Table of contents outboard motor ......84 Periodic maintenance..... 85 Replacement parts ......85 Severe operating conditions ... 85 Maintenance chart 1 ....... 86 Maintenance chart 2 ....... 88 Greasing ......... 89 Cleaning and adjusting spark plug ..........90 Inspecting engine idle speed ..93 Changing engine oil ......

  • Page 7: Safety Information

    Safety information tor and the clamp bracket when the motor is EMU33622 Outboard motor safety trimmed or tilted. Keep body parts out of this Observe these precautions at all times. area at all times. Be sure no one is in this EMU36501 area before operating the power trim and tilt Propeller...

  • Page 8: Gasoline Exposure And Spills

    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...

  • Page 9: Avoid Collisions

    Safety information swamping. EMU33880 Passenger training EMU33772 Avoid collisions Make sure at least one other passenger is Scan constantly for people, objects, and oth- trained to operate the boat in the event of an er boats. Be alert for conditions that limit your emergency.

  • Page 10: General Information

    EMU25183 Outboard motor serial number TIP: 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. control serial number.

  • Page 11: Key Number

    General information ZMU05958 1. Digital electronic control serial number loca- tion ZMU07133 1. Key number EMU25213 C-Tick label EMU25191 Key number Engines affixed with this label conform to If a main key switch is equipped with the mo- certain portion(s) of the Australian Radio tor, the key identification number is stamped Communications Act.
  • Page 12 General information ZMU01697...

  • Page 13: Read Manuals And Labels

    Read all labels on the outboard motor and the boat. ● If you need any additional information, contact your Yamaha dealer. EMU33832 Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements. F300A, FL300A, F350A, FL350A ZMU05950...
  • Page 14 General information ZMU06191 stops if you accidentally leave the EMU34651 Contents of labels helm, which could prevent a runaway The above warning labels mean as follows. boat. EMU33850 EWM01681 Other labels WARNING Keep hands, hair, and clothing away ● from rotating parts while the engine is running.
  • Page 15 General information Electrical hazard EMU35132 Symbols The following symbols mean as follows. Notice/Warning ZMU05666 ZMU05696 Read Owner’s Manual ZMU05664 Hazard caused by continuous rotation ZMU05665...

  • Page 16: Specifications And Requirements

    Specifications and requirements (300 HP@5500 r/min) EMU34520 Specifications FL350AET 257.4 kW@5500 r/min TIP: (350 HP@5500 r/min) “(AL)” stated in the specification data below Idle speed (in neutral): 650 50 r/min represents the numerical value for the alumi- Engine: num propeller installed. Type: Likewise, “(SUS)”...

  • Page 17: Installation Requirements

    Specifications and requirements Propeller mark: FL350AET 1.310 L (1.385 US qt, F300AET X 1.153 Imp.qt) F350AET X Tightening torque for engine: FL300AET XL Spark plug: FL350AET XL 28.0 Nm (2.86 kgf-m, 20.7 ft-lb) Fuel and oil: Propeller nut: Recommended fuel: 55.0 Nm (5.61 kgf-m, 40.6 ft-lb) F300AET Regular unleaded gasoline Engine oil drain bolt:...

  • Page 18: Digital Electronic Control Requirements

    Consult your Yamaha dealer for setting. Your Yamaha dealer can help you select the right propeller for your boating needs. Select a propeller that will allow the engine to reach the middle or upper half of the operating...

  • Page 19: Counter Rotation Models

    For instructions on propeller removal and in- speed range when carrying lighter loads. stallation, see page 94 and 95. Yamaha recommends to use a propeller suit- EMU35140 Start-in-gear protection able for the “Shift Dampener System (SDS)”.

  • Page 20: Fuel Requirements

    Gasoline engine starting and running problems. F300A, FL300A Yamaha does not recommend gasohol con- Use a good quality gasoline that meets the taining methanol because it can cause fuel minimum octane rating. If knocking or ping-...

  • Page 21: Motor Disposal Requirements

    This label is attached to the clamp bracket or with clip. the swivel bracket. Spare parts, such as an extra set of spark ● plugs. Consult your Yamaha dealer for details. EMU25221 Emission control information EMU25310 U.S. insular areas Engines affixed with the label pictured below conform to U.S.
  • Page 22 Specifications and requirements...

  • Page 23: Components

    EMU2579V Components diagram TIP: * May not be exactly as shown; also may not be included as standard equipment on all mod- els (order from dealer). F300A, FL300A, F350A, FL350A ZMU05813 1. Top cowling 2. Anti-cavitation plate 3. Propeller* 4. Cooling water inlet 5.
  • Page 24 Components Single station models (single type) ZMU07278 1. Digital electronic control (side-mount type)* 2. Engine shut-off switch* 3. Clip* 4. Switch panel (for use with side-mount type)* 5. Digital electronic control (single type)* 6. Switch panel (for use with single type)*...
  • Page 25 Components Single station models (twin/triple type) ZMU07285 1. Digital electronic control (twin type)* 2. Engine shut-off switch* 3. Clip* 4. Switch panel (for use with twin type)* 5. Start/Stop switch panel (for use with twin type)* 6. Digital electronic control (triple type)* 7.
  • Page 26 Components Dual station models / main station ZMU07279 1. Digital electronic control (single type)* 12. All Start/Stop switch panel (for use with twin/triple type)* 2. Switch panel (for use with single type)* 13. Station selector switch panel 3. Engine shut-off switch* 4.
  • Page 27 Components Dual station models / sub station ZMU07275 1. Digital electronic control (single type)* 2. Start/Stop switch panel (for use with single type)* 3. Digital electronic control (twin type)* 4. Start/Stop switch panel (for use with twin type)* 5. Digital electronic control (triple type)* 6.

  • Page 28: Digital Electronic Control

    Components ZMU07286 1. Tachometer unit (Square type)* 2. Speedometer unit (Square type)* 3. Fuel management meter (Square type)* 4. 6Y9 Multifunction Color Gauge* EMU35943 Digital electronic control The digital electronic control actuates the shifter, the throttle and remote electrical op- erations.

  • Page 29: Digital Electronic Control-Active Indicator

    Components EMU34972 Digital electronic control-active indicator The digital electronic control-active indicator indicates that the digital electronic control system is in the operating state. ZMU05850 ZMU06276 ZMU05851 ZMU05888 ZMU05959 1. Control lever 2. Digital electronic control-active indicator 3. Digital electronic control-alert indicator 4.

  • Page 30: Digital Electronic Control-Alert Indicator

    Digital electronic control-alert indicator The digital electronic control-alert indicator lights when trouble occurs in the connection between the digital electronic control and outboard motor. Consult your Yamaha deal- er for details. ZMU05960 1. Digital electronic control-alert indicator EMU35822 Control lever Moving the lever forward from the neutral po- sition engages forward gear.

  • Page 31: Neutral Interlock Trigger

    Components Digital electronic control for twin type has the 5. Fully closed function to automatically synchronize both 6. Throttle engine speeds. 7. Fully open Also digital electronic control for triple type EMU26201 has the function to automatically synchronize Neutral interlock trigger the engine speeds of the center engine and To shift out of neutral, first pull the neutral in- starboard side engine, adapting the port side...
  • Page 32 Components Twin type 22.5˚ ZMU06232 ZMU05882 1. Fully open 2. Fully closed 22.5 3. Free accelerator Single type ZMU05883 1. Fully open 2. Fully closed 3. Free accelerator ZMU05880 Triple type 22.5 ZMU05881 ZMU05961 1. Fully open 2. Fully closed 3.

  • Page 33: Throttle Friction Adjuster

    Components ver could move freely and cause an ac- cident. 22.5 Do not overtighten the friction adjuster. ● If there is too much resistance, it could be difficult to move the control lever, which could result in an accident. Single type ZMU05962 1.

  • Page 34: Station Selector Switch

    Components Triple type gine selector switch works only when all the control levers are in neutral. ZMU05963 When constant speed is desired, tighten the ZMU05977 adjuster to maintain the desired throttle set- 1. Engine selector switch ting. EMU35711 EMU35773 Station selector switch Engine shut-off cord (lanyard) and The station selector switch can select either clip...
  • Page 35 Components TIP: The engine cannot be started with the clip re- moved. START START ZMU05818 ZMU06235 ZMU05978 ZMU04565 ZMU07144 ZMU07143...

  • Page 36: Main Switch

    Components Single type START ZMU07142 ZMU06245 1. Cord 2. Clip 3. Engine shut-off switch START EMU35782 Main switch The main switch controls the ignition system; its operation is described below. Only equipped with the main station. “ ” (off) ● ZMU04567 With the main switch in the “...

  • Page 37: Start/Stop Switch Panel

    Components ZMU07146 ZMU07173 Triple type 1. Start/Stop button START START START ZMU05982 ZMU07174 ZMU07146 ZMU07175 EMU42080 Start/Stop switch panel 1. Indicator The engine can be started or turned off by 2. Start/Stop button pressing the Start/Stop button. For twin and triple type, it is possible to start or turn off in- EMU41631 dividual engine.

  • Page 38: Power Trim And Tilt Switch On Digital Electronic Control

    Components ZMU07176 ZMU05822 EMU26154 1. All Start/Stop button Power trim and tilt switch on bottom cowling EMU35153 Power trim and tilt switch on digital The power trim and tilt switch is located on electronic control the side of the bottom cowling. Pushing the The power trim and tilt system adjusts the switch “...

  • Page 39: Power Trim And Tilt Switches

    Power trim and tilt switches TIP: The power trim and tilt system adjusts the Consult your Yamaha dealer about changing outboard motor angle in relation to the tran- the setting. som. Pushing the switch “...

  • Page 40: Cowling Lock Lever (Turn Type)

    Components ECM00660 NOTICE Do not use the tilt support lever or knob when trailering the boat. The outboard motor could shake loose from the tilt sup- port and fall. If the motor cannot be trail- ered in the normal running position, use an additional support device to secure it in the tilt position.

  • Page 41: Fuel Filter

    Components ZMU05825 1. Flushing device TIP: For details on usage, see page 83. EMU41310 Fuel filter The fuel filter functions to remove foreign material and separate water from the fuel. If water separated from the fuel exceeds a specific volume, the alert system will acti- vate.

  • Page 42: Instruments And Indicators

    Instruments and indicators EMU41781 6. Engine trouble-alert indicator 6Y9 Multifunction Color Gauge 7. Low battery voltage-alert indicator The 6Y9 Multifunction Color Gauge (herein- 8. Water separator-alert indicator after called the Multi-Display) shows engine 9. Low oil pressure-alert indicator 10. Overheat-alert indicator status and alert information.

  • Page 43: Low Oil Pressure-Alert

    Do not continue to run the engine if the ● a alert device has activated. Consult low oil pressure alert device has activat- your Yamaha dealer if the problem can- ed. Serious engine damage will occur. not be located and corrected. EMU41700...

  • Page 44: Low Battery Voltage-Alert

    Get back to the port soon if the low battery voltage-alert device has activated. For ZMU07250 charging the battery, consult your Yamaha Stop the engine immediately and see page dealer. 105 of this manual to drain the water from the...

  • Page 45: 6Y8 Multifunction Meters

    For the optional sensor, consult your Yamaha dealer. The tachome- ter unit is available in round or square types. Check your tachometer unit type. ZMU07254 Return to port and consult a Yamaha dealer immediately. EMU31653 6Y8 Multifunction meters ZMU05415 Multifunction meters have 6 kinds of meter 1.

  • Page 46: Overheat Alert

    105 of this manu- Yamaha dealer. al to drain the water from the fuel filter. Get back to the port soon and consult a Yamaha ECM01601 NOTICE dealer immediately. Do not continue to run the engine if the low oil pressure alert device has activat- ed.

  • Page 47: Low Battery Voltage-Alert

    Yamaha dealer. In such an event, the engine will not oper- After the main switch is first turned on, all the ate properly. Consult a Yamaha dealer im- displays come on as a test. After a few sec- mediately.

  • Page 48: 6Y8 Multifunction Fuel Management Meters

    Various meters can be installed onto the out- ation. board motor according to user preference. For more information, see the operation For details, consult your Yamaha dealer. manual originally supplied with the meter. Analog tachometer ZMU07245...
  • Page 49 Instruments and indicators Trim meter ZMU04581...

  • Page 50: Engine Control System

    Alert system ECM00091 NOTICE Do not continue to operate the engine if a alert device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected. EMU35184 ZMU05891 Digital Electronic Control alert If during operation of the outboard motor any...

  • Page 51: Low Oil Pressure Alert

    Engine control system The pop-up window will appear on the off the alert activation on the engine not af- ● Multi-Display. fected by overheating, turn off the main switch of the engine overheating. If the alert system has activated, stop the engine and tilt the outboard motor up to check the cooling water inlet for clogging.

  • Page 52: Water Separator Alert

    The outboard motor is equipped with a water drain the water from the fuel filter. Get back separator alert system. If water separated to the port soon and consult a Yamaha deal- from the fuel exceeds a specific volume, the er immediately.

  • Page 53: Installation

    Consult your Yamaha dealer or boat manu- takes for the cooling system may not get ad- facturer for further information on determin- equate water supply, which can cause...
  • Page 54 Test runs at differ- ent heights can help determine the optimum mounting height. Consult your Yamaha deal- er or boat manufacturer for further informa- tion on determining the proper mounting height.

  • Page 55: Operation

    Operation For 10 hours for breaking in engine avoid ex- EMU36381 First-time operation tended idling, rough water and crowded ar- eas. EMU36391 Fill engine oil For the first hour of operation: The engine is shipped from the factory with- Run the engine at varying speeds up to out engine oil.

  • Page 56: Remove Cowling

    If enough water to raise the float ring ZMU05852 is found in the fuel, or if a significant amount of debris is found, the fuel tank should be checked and cleaned by a Yamaha dealer. ZMU05853 EMU36442 ZMU05854 Fuel system...

  • Page 57: Engine Shut-Off Cord (Lanyard)

    NOTICE: If the be sure the level falls between the upper garden hose connector is not properly and lower marks. Consult your Yamaha connected, cooling water can leak out dealer if the oil level is out of specified and the engine can overheat during oper- level or if it appears milky or dirty.

  • Page 58: Install Cowling

    If the top cowling is loose, have it repaired by your EMU36941 Install cowling Yamaha dealer. Be sure that all cowling lock levers are released. Be sure that the rubber seal is seated all the way around the engine.

  • Page 59: Battery

    Operation the outboard motor accidentally falls. Body parts can be crushed between the ● motor and the clamp bracket when the motor is trimmed or tilted. Be sure no one is near the outboard ● motor before performing this check. Check the power trim and tilt unit for any sign of oil leaks.

  • Page 60: Filling Fuel

    Operation start the engine. ly with dry rags. Dispose of rags properly Refer to the battery manufacturer’s instruc- according to local laws or regulations. tions for checks for your particular battery. EMU27452 Operating engine EMU30025 Filling fuel EWM00420 WARNING EWM01830 WARNING Before starting the engine, make sure ●...

  • Page 61: Change Of Station

    If the buzzer sounds and the water separator-alert indica- For dual station boats, the station selector tor blinks, consult your Yamaha dealer im- switch can select either the main station or mediately. sub station for the operating seat.
  • Page 62 Operation ZMU04628 ZMU06236 ZMU05829 ZMU07167 TIP: The start-in-gear protection device prevents the engine from starting except when in neu- START START tral. Attach the engine shut-off cord to a se- cure place on your clothing, or your arm or leg. Then install the clip on the other end of the cord into the engine shut-off switch.
  • Page 63 Operation Turn the main switch to “ ” (on) to make sure that the digital electronic con- START trol-active indicator lights. The engine can not be started when the digital elec- tronic control-alert indicator lights. ZMU04596 START Turn the main switch to “ ”...
  • Page 64 Operation When starting the engine using the gine shut-off switch, the buzzer will sound. Start/Stop button, press the button to Except the single type, if the clip is not in- ● start the engine. The indicator for the stalled to the engine shut off switch, the starting engine will come on.
  • Page 65 Operation could tear loose. Do not route the cord where it could become entangled, pre- venting it from functioning. Avoid accidentally pulling the cord dur- ● ing normal operation. Loss of engine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly.

  • Page 66: Checks After Starting Engine

    Operation end of the cord into the engine shut-off switch. ZMU07148 ZMU07322 Press the Start/Stop button to start the engine. The indicator for the starting en- gine will come on. NOTICE: Do not keep the starter motor turning for more than 5 seconds. If the starter motor is turned continuously for more than 5 seconds, the battery will ZMU07149...

  • Page 67: Warming Up Engine

    Check that the engine stops when the clip ● the lower case or the cooling water pilot is pulled from the engine shut-off switch. hole is blocked. Consult your Yamaha Check that the engine cannot be started ● dealer if the problem cannot be located with the clip removed from the engine and corrected.
  • Page 68 Operation TIP: When all engines have started, the center engine will run at the average speed of port side and starboard side engines’ speeds. ZMU06001 Operate the port side engine using the port ● side control lever. The center engine runs at the idling speed. ●...

  • Page 69: Shifting

    Operation The starboard side engine runs at the time lag when the gear is shifted until the en- ● idling speed. gine speed has decreased sufficiently. Push the engine selector switch three To shift out of neutral times to operate the three engines. Pull the neutral interlock trigger up (if equipped).

  • Page 70: Stopping Boat

    Operation To shift from in gear (forward/reverse) to neutral Close the throttle so that the engine slows to idle speed. ZMU05829 EMU31742 Stopping boat EWM01510 WARNING ZMU06239 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.
  • Page 71 Operation pipe due to the wave action, causing en- gine trouble. ZMU06004 ZMU07323 Operate the port side engine using the port ● ZMU06003 side control lever. 1. Port side control lever When all engines have started, the center ● 2. Starboard side control lever engine will run at the average speed of 3.
  • Page 72 Operation ZMU06005 ZMU06007 ZMU07324 ZMU07325 Operate the port side engine using the port Operate the port side engine using the port ● ● side control lever. side control lever. Operate the starboard side engine using Operate the center engine using the star- ●...
  • Page 73 Operation ZMU06009 ZMU06010 ZMU07326 ZMU07327 Operate the center engine using the port Operate the center engine using the port ● ● side control lever. side control lever. Operate the starboard side engine using ● the starboard side control lever. Operating the center engine ZMU06002...

  • Page 74: Boat Direction

    Operation EMU35901 Boat direction The illustrations below indicate the boat direction when operating the three outboard motors. When using the port side engine, center engine and starboard side engine ZMU06011 :Boat direction and turning force The size of the arrow is proportional to the turning force. :Propulsion...
  • Page 75 Operation When using the port side engine and starboard side engine ZMU06012 :Boat direction and turning force The size of the arrow is proportional to the turning force. :Propulsion...
  • Page 76 Operation When using the center engine ZMU06013 :Boat direction and turning force The size of the arrow is proportional to the turning force. :Propulsion...

  • Page 77: Trolling

    Operation TIP: EMU30880 Trolling Trolling is affected by currents and other ● EMU41830 operating conditions and may differ from Adjusting trolling speed the actual engine speed. When the control lever is either in the for- When warming up a cold engine, the troll- ●...

  • Page 78: Procedure For Dual Station Models

    Operation START ZMU04599 ZMU07148 ZMU07171 ZMU07149 TIP: The engine can also be stopped by pulling the cord and removing the clip from the en- gine shut-off switch, then turning the main switch to “ ” (off). Remove the key if the boat will be left un- attended.

  • Page 79: Trimming Outboard Motor

    Operation ZMU07147 ZMU07172 TIP: The engine can also be stopped by pulling the engine shut-off cord and removing the clip from the engine shut-off switch, then turning the main switch on the main station to “ ” (off). Remove the key if the boat will be left un- attended.

  • Page 80: Adjusting Trim Angle (Power Trim And Tilt)

    Operation ZMU06259 1. Trim operating angle EMU27886 Adjusting trim angle (Power trim and tilt) EWM00753 WARNING Be sure all people are clear of the out- ● board motor when adjusting the trim angle. Body parts can be crushed be- ZMU05834 tween the motor and the clamp bracket when the motor is trimmed or tilted.

  • Page 81: Adjusting Boat Trim

    Operation Bow Up Too much trim-out puts the bow of the boat too high in the water. Performance and econ- omy are decreased because the hull of the boat is pushing the water and there is more air drag. Excessive trim-out can also cause the propeller to ventilate, which reduces per- formance further, and the boat may “por- poise”...

  • Page 82: Tilting Up And Down

    Operation motor trim angle may have little effect on the trim of the boat when operating. EMU27946 Tilting up and down If the engine will be stopped for some time or if the boat is moored in shallows, the out- board motor should be tilted up to protect the propeller and lower case from damage by collision with obstructions, and also to re-...
  • Page 83 Operation Set the tilt support lever to support the engine. WARNING! After tilting the outboard motor, be sure to support it with the tilt support knob or tilt sup- port 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.

  • Page 84: Procedure For Tilting Down (Power Trim And Tilt Models)

    Operation that the trim rods retracts completely during mooring. This protects the rods from marine growth and corro- sion, which could damage the power trim and tilt mechanism. [ECM00252] EMU35515 Procedure for tilting down (power trim and tilt models) Push the power trim and tilt switch “ ”...

  • Page 85: Shallow Water

    Operation EMU28061 Shallow water EMU42210 Power trim and tilt models The outboard motor can be tilted up partially to allow operation in shallow water. ECM01490 NOTICE If the engine speed is suddenly in- ● creased when the outboard motor is ZMU05829 partially tilted up, the power trim and tilt Slightly tilt the outboard motor up to the...
  • Page 86 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. EMU42230 De-activating the engine speed control system ECM02500 NOTICE This procedure must be done out of the ZMU05837 shallow water.

  • Page 87: Operating In Other Conditions

    Operation ZMU05842 ZMU06258 EMU41370 Operating in other conditions Operating in salt water After operating in saltwater, brackish water, or water high in other minerals, flush the cooling system with fresh water to minimize corrosion and clogging of the cooling water passages with deposits.

  • Page 88: Maintenance

    EMU35580 Storing outboard motor erably as it warms up and can build up When storing your Yamaha outboard motor pressure in the fuel container. This can for prolonged periods of time (2 months or cause fuel leakage and a potential fire longer), several important procedures must hazard.

  • Page 89: Procedure

    96. Inspect the oil for the pres- 2. Drain screw 3. Cap ence of water that indicates a leaky seal. Seal replacement should be performed by an authorized Yamaha dealer prior to use. Grease all grease fittings. For further de- tails, see page 89. TIP: For long-term storage, fogging the engine with oil is recommended.

  • Page 90: Cleaning The Outboard Motor

    Maintenance hose adapter from the garden hose con- ECM01530 NOTICE nector. Do not perform this procedure while the Reinstall the garden hose connector engine is running. The water pump may onto the fitting on the bottom cowling. be damaged and severe damage from Tighten connector securely.

  • Page 91: Periodic Maintenance

    EMU28511 Replacement parts EMU2850B Periodic maintenance If replacement parts are necessary, use only genuine Yamaha parts or parts of equivalent EWM01871 WARNING design and quality. Any part of inferior quality may malfunction, and the resulting loss of These procedures require mechanical control could endanger the operator and skills, tools, and supplies.

  • Page 92: Maintenance Chart 1

    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...
  • Page 93 Maintenance Initial Every 20 hours Item Actions hours (1 hours (3 hours (5 months) year) years) years) Fuel filter (can be dis- Inspection or replace- assembled) ment as necessary Fuel line (High pres- Inspection sure) Fuel line (High pres- Inspection or replace- sure) ment as necessary Fuel line (Low pres-...

  • Page 94: Maintenance Chart 2

    (3 hours (5 months) year) years) years) Wire harness connec- Inspection or replace- tions/wire coupler con- ment as necessary nections (Yamaha) Meter/gauge Inspection EMU34451 Maintenance chart 2 Every Item Actions 1000 hours Exhaust guide/exhaust Inspection or replace- manifold ment as necessary...

  • Page 95: Greasing

    Maintenance EMU28943 Greasing Yamaha grease A (water resistant grease) Yamaha grease D (corrosion resistant grease; for propeller shaft) F300A, FL300A, F350A, FL350A ZMU05859...

  • Page 96: Cleaning And Adjusting Spark Plug

    ZMU05901 Instead, take the outboard motor to a Remove the bolts to move the plate. Yamaha dealer. You should periodically re- move and inspect the spark plug because heat and deposits will cause the spark plug to slowly break down and erode.
  • Page 97 Maintenance 2. Spark plug part number 3. Spark plug I.D. mark (NGK) Spark plug gap: 1.0–1.1 mm (0.039–0.043 in) When fitting the plug, wipe off any dirt from the threads, and then screw it in to the correct torque. ZMU05903 Spark plug torque: Remove the spark plug.
  • Page 98 Maintenance ZMU05901 Bolt tightening torque: 8.0 Nm (0.8 kgf-m, 5.8 ft-lb) 12. Install the rear cover, and tighten the ZMU05929 bolts. ZMU05900 Bolt tightening torque: 8.0 Nm (0.8 kgf-m, 5.8 ft-lb) 13. Be sure to fit the 4 positions during in- ZMU05932 stallation.

  • Page 99: Inspecting Engine Idle Speed

    Maintenance consult a Yamaha dealer or other quali- fied mechanic. Idle speed (in neutral): 650 50 r/min EMU35084 Changing engine oil ECM01710 NOTICE ZMU05930 Change the engine oil after the first 20 hours of operation or 3 months, and ev- ery 100 hours or at 1-year intervals there- after.

  • Page 100: Checking Propeller

    Maintenance ZMU01897 Checkpoints Check each of the propeller blades for ero- ● sion from cavitation or ventilation, or other damage. Check the propeller shaft for damage. ● Check the splines for wear or damage. ● Check for fish line tangled around the pro- ●...

  • Page 101: Installing Propeller

    Maintenance ation and be lost. Apply Yamaha marine grease or a corro- sion resistant grease to the propeller shaft. Install the thrust washer and propeller on the propeller shaft. NOTICE: Make sure to install the thrust washer before in- stalling the propeller. Otherwise, the lower case and propeller boss could be damaged.

  • Page 102: Changing Gear Oil

    Remove the cooling water inlet covers case may be damaged. Have a Yamaha dealer check and repair the on both sides of the gear case. Be care- ful not to lose the bolt and nut. outboard motor.

  • Page 103: Inspecting And Replacing Anode(S)

    F350AET 1.520 L (1.607 US qt, 1.338 EMU29313 Imp.qt) Inspecting and replacing anode(s) FL300AET 1.310 L (1.385 US qt, 1.153 Yamaha outboard motors are protected from Imp.qt) corrosion by sacrificial anodes. Inspect the FL350AET 1.310 L (1.385 US qt, 1.153 external anodes periodically. Remove scales Imp.qt)

  • Page 104: Checking Battery (For Electric Start Models)

    Consult a tery’s charge. If the battery needs charg- Yamaha dealer for inspection and replace- ing, consult your Yamaha dealer. ment of internal anodes attached to the pow- Check the battery connections. They er unit.
  • Page 105 Connecting an accessory battery (optional) If connecting an accessory battery, con- sult your Yamaha dealer about correct wiring. It is recommendable to install the fuse to the isolator lead as shown in the illustration. For the fuse size, be sure to follow local regulations.

  • Page 106: Disconnecting The Battery

    Maintenance Twin engines Triple engines ZMU05941 ZMU05956 1. Starboard side engine 1. Starboard side engine 2. Port side engine 2. Center engine 3. Red cable 3. Port side engine 4. Black cable 4. Red cable 5. Isolator lead with circuit protection 5.
  • Page 107 Maintenance [ECM01940] Disconnect the positive cable(s) and re- move the battery from the boat. Clean, maintain, and store the battery according to the manufacturer’s instruc- tions.

  • Page 108: Trouble Recovery

    A. Clean or replace fuel filter. ing, consult your Yamaha dealer. Q. Is fuel pump malfunctioning? Starter will not operate. A. Have serviced by a Yamaha dealer. Q. Does the Digital electronic control-alert in- dicator come on? Q. Are spark plugs fouled or of incorrect A.
  • Page 109 Q. Is low oil pressure-alert indicator on or blinking? Q. Are ignition parts malfunctioning? A. Have serviced by a Yamaha dealer. A. Have serviced by a Yamaha dealer. Q. Is heat range of spark plugs incorrect? Q. Has alert system activated? A.
  • Page 110 Trouble Recovery (r/min) range. Q. Are electrical parts malfunctioning? Q. Is outboard motor mounted at incorrect A. Have serviced by a Yamaha dealer. height on transom? A. Have outboard motor adjusted to proper Q. Is specified fuel not being used? transom height.

  • Page 111: Temporary Action In Emergency

    When using only one or two en- Q. Is steering pivot loose or damaged? gines in an emergency, be sure to keep the A. Have serviced by a Yamaha dealer. unused engine(s) tilted up and operate the EMU29433 Temporary action in other engine(s) at low speed.

  • Page 112: Power Trim And Tilt Will Not Operate

    3. Fuel pump fuse (15 A) 4. Starting switch (30 A) Consult your Yamaha dealer if the new fuse 5. Main switch / PTT switch / Digital electronic immediately blows again. control ECM (Electronic control module) fuse (20 A) 6.
  • Page 113 Trouble Recovery Remove the top cowling. Disconnect the lead from the holder. ZMU05892 Disconnect the water detection switch ZMU05893 coupler. NOTICE: Be careful not to get Disconnect the water detection switch any water on the water detection switch coupler, otherwise a malfunc- coupler from the holder.
  • Page 114 Trouble Recovery ZMU05895 ZMU05895 Unscrew the filter cup from the filter Bolt tightening torque: housing. NOTICE: Be careful not to 8.0 Nm (0.8 kgf-m, 5.8 ft-lb) twist the water detection switch lead when unscrewing the filter cup. 11. Connect the water detection switch cou- pler securely until a click is heard.

  • Page 115: Treatment Of Submerged Motor

    EMU33501 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. NOTICE: Do not attempt to run the outboard motor until it has been com- pletely inspected.
  • Page 116 YAMAHA MOTOR CO., LTD. Printed in Japan March 2010–0.1  1 ! Printed on recycled paper...

This manual is also suitable for:

Fl300aF350aFl350a

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