Yamaha F300A Owner's Manual
  1. Manuals
  2. Brands
  3. Yamaha Manuals
  4. Outboard Motor
  5. F300A
  6. Owner's manual

Yamaha F300A Owner's Manual

Hide thumbs Also See for F300A:
Table of Contents

Advertisement

Quick Links

OWNER'S MANUAL
q
q
Read this manual carefully before operating this
q
q
outboard motor.
F300A
F350A
FL300A
FL350A
6AW-28199-74-E0

Advertisement

Table of Contents
loading

Related Manuals for Yamaha F300A

Summary of Contents for Yamaha F300A

  • Page 1 F300A F350A FL300A FL350A OWNER’S MANUAL Read this manual carefully before operating this outboard motor. 6AW-28199-74-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 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 ....14 Rotating parts........1 Fuel requirements ......14 Hot parts ........... 1 Gasoline ..........
  • Page 5 Table of contents Overheat alert ......... 35 Shifting ..........56 Water separator alert ...... 36 Stop switches ........56 Engine trouble alert ......36 Selecting outboard motor (triple engine) ........57 Low battery voltage-alert....36 Shifting .......... 58 6Y8 Multifunction speed & fuel meters .........
  • Page 6 Table of contents plug ..........83 Inspecting idling speed ....86 Changing engine oil ......86 Checking wiring and connectors ..86 Checking propeller ......87 Removing propeller ......87 Installing propeller ......88 Changing gear oil ......88 Inspecting and replacing anode(s)........

  • Page 7: Safety Information

    Safety information EMU33622 tor and the clamp bracket when the motor is 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 EMU36500 area before operating the power trim and tilt Propeller...

  • Page 8: Gasoline Exposure And Spills

    Personal flotation devices cording to the boat manufacturers instruc- Have an approved personal flotation device tions. Overloading or incorrect weight (PFD) on board for every occupant. Yamaha distribution can compromise the boats han-...

  • Page 9: Avoid Collisions

    Safety information dling and lead to an accident, capsizing or boating in hazardous weather. swamping. EMU33880 Passenger training EMU33771 Avoid collisions Make sure at least one other passenger is Scan constantly for people, objects, and trained to operate the boat in the event of an other boats.

  • Page 10: General Information

    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.

  • Page 11: Key Number

    General information ZMU05958 1. Key number 1. Digital electronic control serial number loca- tion EMU37290 EC Declaration of Conformity (DoC) This outboard motor conforms to certain por- tions of the European Parliament directive relating to machinery. Each conformed outboard motor accompa- nied with EC DoC.EC DoC contains the fol- lowing information;...
  • Page 12 General information ZMU05943 1. CE marking location ZMU06040...

  • Page 13: Read Manuals And Labels

    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. ZMU05942...
  • 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 EMU35132 Electrical hazard 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 EMU35950 4-stroke V Specifications Displacement: TIP: 5330.0 cm Bore × stroke: “*” means, select the engine oil referring to 94.0 × 96.0 mm (3.70 × 3.78 in) the chart of engine oil paragraph. For further Ignition system: information, see page 14.

  • Page 17: Installation Requirements

    Specifications and requirements F300AET Regular unleaded gasoline F350AET 1.520 L (1.607 US qt, F350AET Premium unleaded gaso- 1.338 Imp.qt) line FL300AET 1.310 L (1.385 US qt, FL300AET Regular unleaded gaso- 1.153 Imp.qt) line FL350AET 1.310 L (1.385 US qt, FL350AET Premium unleaded gaso- 1.153 Imp.qt) line Tightening torque for engine:...

  • Page 18: Digital Electronic Control Requirements

    If the digital electronic control unit is re- Yamaha designs and manufactures propel- placed lers for every Yamaha outboard motor and If the ECM (Electronic control module) of every application. the used outboard motor is replaced...

  • Page 19: Counter Rotation Models

    These propellers are identified with the Your Yamaha dealer can help you select the letter “L” after the size indication on the pro- right propeller for your boating needs. Select peller. WARNING! Never use a standard...

  • Page 20: Engine Oil Requirements

    Amount of adding engine oil (at Periodic EMU37710 Gasoline maintenance) Excluding oil filter: F300A, FL300A 6.3 L (6.66 US qt, 5.54 Imp.qt) Use a good quality gasoline that meets the Amount of adding engine oil (at Periodic minimum octane rating. If knocking or ping-...

  • Page 21: Muddy Or Acidic Water

    EMU36880 Waterproof flashlight with extra batteries. Muddy or acidic water An extra engine shut-off cord (lanyard) Yamaha strongly recommends that you have with clip. your dealer install the optional chromium- Spare parts, such as an extra set of spark plated water pump kit if you use the outboard plugs.

  • Page 22: Components

    EMU2579J Components diagram TIP: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. F300A, F350A, FL300A, FL350A ZMU05813 1. Top cowling 2. Anti-cavitation plate 3. Propeller* 4. Cooling water inlet 5.
  • Page 23 Components Single station models ZMU06310 1. Digital electronic control (side-mount type)* 2. Clip 3. Engine shut-off switch 4. Switch panel (for use with side-mount type)* 5. Digital electronic control (single type)* 6. Switch panel (for use with single type)* 7. Digital electronic control (twin type)* 8.
  • Page 24 Components Dual station models / main station ZMU05974 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 7.
  • Page 25 Components Dual station models / sub station ZMU05975 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 7.

  • Page 26: Digital Electronic Control

    Components ZMU05485 1. Tachometer unit (Square type)* 2. Speedometer unit (Square type)* 3. Speed & fuel meter unit (Square type)* 4. Fuel management meter (Square type)* EMU35941 Digital electronic control The digital electronic control actuates the shifter, the throttle and remote electrical op- erations.

  • Page 27: 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 28: 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 EMU35821 Control lever Moving the lever forward from the neutral po- sition engages forward gear.

  • Page 29: Neutral Interlock Trigger

    Components Digital electronic control for twin type has the 4. Shift function of automatically synchronizing the 5. Fully closed engine speeds of both engines. 6. Throttle 7. Fully open Also digital electronic control for triple type has the function of automatically synchroniz- EMU26201 ing the engine speeds of the center engine Neutral interlock trigger...
  • Page 30 Components Twin type 22.5˚ ZMU06232 ZMU05882 Single type 22.5 ZMU05880 ZMU05883 Triple type 22.5 ZMU05881 ZMU05961...

  • Page 31: 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 32: Station Selector Switch

    Components Triple type gine selector switch works only when all the control levers are in neutral. ZMU05963 ZMU05977 When constant speed is desired, tighten the adjuster to maintain the desired throttle set- 1. Engine selector switch ting. EMU35710 EMU35772 Station selector switch Engine shut-off cord (lanyard) and The station selector switch can select either clip...
  • Page 33 Components TIP: The engine cannot be started with the clip re- moved. Main station ZMU05978 1. Cord 2. Clip 3. Engine shut-off switch ZMU06235 Sub station ZMU04565 ZMU05979 START START ZMU05818 ZMU05980...

  • Page 34: Main Switch

    Components Single type START ZMU05981 ZMU06245 1. Cord 2. Clip START 3. Engine shut-off switch EMU35781 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 35: Starter Button

    Components Triple type Triple type START START START ZMU05982 ZMU05985 EMU35730 EMU35740 Starter button Engine stop button To start the engine with the electric starter, To stop the engine, push the red button. Only push the black button. Only equipped on the equipped on the sub station.

  • Page 36: Power Trim And Tilt Switch On Digital Electronic Control

    Components Triple type ZMU05822 ZMU05988 EMU26153 EMU35152 Power trim and tilt switch on bottom Power trim and tilt switch on digital engine cowling electronic control The power trim and tilt switch is located on The power trim and tilt system adjusts the the side of the bottom engine cowling.

  • Page 37: Power Trim And Tilt Switches

    67 and 69. EMU35040 Tilt limiter This outboard motor is equipped with a tilt limiter that controls the tilt range. TIP: Consult your Yamaha dealer about changing the setting. EMU35030 Tilt support lever for power trim and ZMU05835 tilt model...

  • Page 38: Top Cowling Lock Lever (Turn Type)

    Components ZMU05852 ZMU05824 ZMU05853 ECM00660 NOTICE When installing the cowling, align the 3 posi- tions of the grommets to fit the cowling in the Do not use the tilt support lever or knob rubber seal. when trailering the boat. The outboard motor could shake loose from the tilt sup- port and fall.

  • Page 39: Flushing Device

    The water separator-alert indicator of 6Y8 Multifunction Tachometer will blink. The buzzer will sound intermittently only when the gear shift is in neutral. If the alert system has activated, stop the engine and consult a Yamaha dealer im- mediately. ZMU05825 1. Flushing device EMU35561...

  • Page 40: Instruments And Indicators

    If the buzzer sounds and the water sep- will be available. For the optional sensor, arator-alert indicator blinks, consult your consult your Yamaha dealer. The tachome- Yamaha dealer immediately. ter unit is available in round or square types. TIP: Check your tachometer unit type.

  • Page 41: Low Oil Pressure-Alert

    Serious engine damage will occur. Do not continue to operate the engine if a alert device has activated. Consult your Yamaha dealer if the problem can- ZMU05430 not be located and corrected. Stop the engine immediately if the buzzer...

  • Page 42: Water Separator Alert

    (fuel filter) while cruising. In such an event, stop the engine immediately and see page 97 of this manual to drain the water from the fuel filter. Get back to the port soon and consult a Yamaha dealer immediately. ZMU05425 ECM00920...

  • Page 43: 6Y8 Multifunction Speedometers

    For the optional sensors, consult your Yamaha dealer. After the main switch is first turned on, all the displays come on as a test. After a few sec- onds, the gauge will change to normal oper- ation.

  • Page 44: 6Y8 Multifunction Fuel Management Meters

    Instruments and indicators ZMU05437 ZMU05438 1. Speedometer 1. Set button 2. Fuel meter 2. Mode button 3. Multifunction display EMU36250 6Y8 Multifunction fuel management meters The fuel management meter has the func- tions of fuel flow meter, total consumption display, fuel economy display, and remain- ing fuel display.

  • Page 45: 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. EMU35183 ZMU05891 Digital Electronic Control alert If during operation of the outboard motor any...
  • Page 46 Engine control system The buzzer will sound. Main station START START START ZMU05989 Sub station ZMU06297 ZMU05990 ZMU04583 START START ZMU05991 ZMU05827 ZMU05992...

  • Page 47: Low Oil Pressure Alert

    Twin engine drive or triple engine drive us- is correct and the alert device does not ers: switch off, consult your Yamaha dealer. If the overheat alert system of one engine ac- Twin engine drive or triple engine drive us- tivates, the engine will slow down.

  • Page 48: Installation

    Consult your Yamaha dealer or boat manu- excessive propeller slip, and the water in- facturer for further information on determin- takes for the cooling system may not get ad- ing the proper mounting location.
  • Page 49 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 50: Operation

    Operation EMU36380 TIP: First-time operation Failure to follow the break-in procedure EMU36390 could result in reduced engine life or even Fill engine oil severe engine damage. Run the engine in The engine is shipped from the factory with- the water, under load (in gear with a propel- out engine oil.

  • Page 51: Fuel Level

    Check that the fuel filter is clean and free of water. If enough water to raise the float ring 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...

  • Page 52: Controls

    Operation Single type ZMU05854 ZMU04565 EMU37670 Controls Turn the steering wheel full-right and full- left. Make sure operation is smooth and unrestricted throughout the whole range with no binding or excessive free play. Operate the throttle levers several times to make sure there is no hesitation in their travel.

  • Page 53: Engine Oil

    Check the oil level using the dipstick to be sure the level falls between the upper and lower marks. Consult your Yamaha dealer if the oil level is out of specified level or if it appears milky or dirty.

  • Page 54: Engine

    [ECM01800] ZMU06134 ZMU06135 After installing, check the fitting of the top ZMU06057 cowling by pushing it with both hands. If the 1. Fitting top cowling is loose, have it repaired by your 2. Flushing device Yamaha dealer.

  • Page 55: Checking Power Trim And Tilt System

    Operation ZMU05940 ZMU05868 EMU35243 1. Tilt rod Checking power trim and tilt system 2. Trim rods EWM01930 WARNING Use the tilt support lever to lock the mo- Never get under the lower unit while it tor in the up position. Operate the tilt is tilted, even when the tilt support lever down switch briefly so the motor is sup- is locked.

  • Page 56: Battery

    Operation doctor immediately. If gasoline spills on your skin, wash with soap and wa- ter. If gasoline spills on your clothing, change your clothes. Stop the engine. Be sure you are in a well-ventilated out- door area, either securely moored or trailered.

  • Page 57: Change Of Station

    Operation EMU27492 Starting engine EWM01600 WARNING Before starting the engine, make sure that the boat is tightly moored and that you can steer clear of any obstructions. Be sure there are no swimmers in the wa- ter near you. EMU35866 Procedure for single station models 1.
  • Page 58 Operation ZMU04628 ZMU06236 START START ZMU05829 ZMU05828 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 59 Operation START ZMU05830 Turn the main switch to “ ” (start), and hold it for a maximum of 5 seconds. START START ZMU05994 Immediately after the engine starts, re- ZMU06246 lease the main switch to return it to “ ” (on).
  • Page 60 Operation start after 5 seconds of cranking, re- TIP: turn the main switch to “ ” (on), wait The start-in-gear protection device prevents 10 seconds, then crank the engine the engine from starting except when in neu- again. tral. [ECM00192] TIP: The sub station can start and stop the en- gine.
  • Page 61 Operation of the sub station lights. ZMU05997 ZMU05976 Push the starter button to start the mo- Attach the engine shut-off cord to a se- tor. NOTICE: Never push the starter cure place on your clothing, or your arm button while the engine is running. or leg.

  • Page 62: Checks After Starting Engine

    Operation er the cooling water inlet on the lower case or the cooling water pilot hole is blocked. Consult your Yamaha dealer if the problem cannot be located and cor- rected. ZMU05984 ZMU05848 Check that no water leaks from the joints be- tween the exhaust cover, cylinder head, and body cylinder.

  • Page 63: Selecting Outboard Motor (Triple Engine)

    Operation shut-off switch. EMU35880 Selecting outboard motor (triple engine) After all engines have started, set all control levers to Neutral. Push the engine selector switch repeatedly to change the digital elec- tronic control-active indicator and select the desired engine. ZMU05999 Operate the port side engine using the port side control lever.

  • Page 64: Shifting

    Operation Operate the port side engine using the port side control lever. The center engine runs at the idling speed. Operate the starboard side engine using the starboard side control lever. Push the engine selector switch twice to operate the center engine. ZMU06000 ZMU06000 ZMU05999...
  • Page 65 Operation equipped). slows to idle speed. ZMU06239 ZMU06285 1. Neutral interlock trigger Move the control lever firmly and crisply forward (for forward gear) or backward (for reverse gear) 22.5° (a detent can felt). 22.5˚ 22.5˚ ZMU05832 After the engine is at idle speed in gear move the control lever firmly and crisply into the neutral position.

  • Page 66: Stopping Boat

    Operation pipe due to the wave action, causing en- gine trouble. ZMU05829 EMU31742 Stopping boat 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.
  • Page 67 Operation Operate the port side engine using the port side control lever. Operate the starboard side engine using the starboard side control lever. Operating the port side engine and center engine ZMU06004 Operate the port side engine using the port side control lever.
  • Page 68 Operation Operating the center engine and star- board side engine ZMU06010 Operate the center engine using the port ZMU06008 side control lever. ZMU06009 Operate the center engine using the port side control lever. Operate the starboard side engine using the starboard side control lever. Operating the center engine ZMU06002...

  • Page 69: 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 70 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 71 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 72: Stopping Engine

    Operation EMU27821 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. EMU35801 Procedure for single station models Turn the main switch to “...

  • Page 73: Trimming Outboard Motor

    Operation cause boat instability and can make steering the boat more difficult. This in- creases the possibility of an accident. If the boat begins to feel unstable or is hard to steer, slow down and/or readjust the trim angle. The trim angle of the outboard motor helps determine the position of the bow of the boat in the water.

  • Page 74: Adjusting Boat Trim

    Operation angle can cause loss of control. If equipped with a power trim and tilt switch located on the bottom cowling, use the switch only when the boat is at a complete stop with the engine off. Do not adjust the trim angle with this switch while the boat is moving.

  • Page 75: Tilting Up And Down

    Operation plane. TIP: Bow Up Depending on the type of boat, the outboard Too much trim-out puts the bow of the boat motor trim angle may have little effect on the too high in the water. Performance and econ- trim of the boat when operating. omy are decreased because the hull of the EMU27944 Tilting up and down...

  • Page 76: Procedure For Tilting Up (Power Trim And Tilt Models)

    Operation stopped 30 seconds or more. EMU35505 Procedure for tilting up (power trim and tilt models) The main switch must be “ ” (on) for the power trim and tilt switch on the dig- ital electronic control to operate. Place the control lever in neutral. ZMU06280 ZMU06236 ZMU05837...

  • Page 77: Procedure For Tilting Down (Power Trim And Tilt Models)

    Operation ZMU05839 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 78: Shallow Water

    Operation ZMU05856 ZMU05841 Push the power trim and tilt switch “ ” (down) to lower the outboard motor to the desired position. ZMU06021 ZMU06258 ZMU05842 EMU28061 Shallow water ZMU05840 EMU32871 Power trim and tilt models The outboard motor can be tilted up partially to allow operation in shallow water.
  • Page 79 Operation unit could be damaged. Do not tilt the outboard motor up so that the cooling water inlet on the lower unit is above the surface of the water when setting up for and cruising in shallow water. Otherwise severe dam- age from overheating can result.

  • Page 80: Cruising In Other Conditions

    Cruising in muddy, turbid, or acidic water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (see page 15) if you use the outboard motor in acidic water or water with a lot of sediment in it, such as muddy or turbid (cloudy) water.

  • Page 81: Maintenance

    Drain the remaining gasoline in the va- a transom saver bar. Consult your Yamaha por separator into a container. Loosen dealer for further details. the drain screw, and then remove the EMU35580 cap.

  • Page 82: Lubrication

    Change the gear oil. For instructions, see page 88. Inspect the oil for the pres- ence of water that indicates a leaky seal. Seal replacement should be performed by an authorized Yamaha dealer prior to use. ZMU05858 Grease all grease fittings. For further de- tails, see page 82.

  • Page 83: Cleaning The Outboard Motor

    A touch-up paint is avail- Tighten the connector securely. NO- able from your Yamaha dealer. TICE: Do not leave the garden hose connector loose on the bottom cowl- ing fitting or let the hose hang free...

  • Page 84: Periodic Maintenance

    Operating continuously at a low engine to perform a maintenance procedure, speed (rpm) for many hours have a Yamaha dealer or other qualified Brief periods of rapid acceleration and de- mechanic do the work. celeration followed by engine shut off be-...

  • Page 85: 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 86 Maintenance Initial Every 20 hours Item Actions hours (1 hours (3 hours (5 months) year) years) years) Engine oil Replacement Engine Oil filter (car- Replacement tridge) Fuel filter (can be dis- Inspection or replace- assembled) ment as necessary Fuel line(High pres- Inspection sure) Fuel line(High pres-...

  • Page 87: Maintenance Chart 2

    Inspection Main switch/stop Inspection or replace- switch ment as necessary 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 Guide exhaust/exhaust Inspection or replace-...

  • Page 88: Greasing

    Maintenance EMU28941 Greasing Yamaha grease A (water resistant grease) Yamaha grease D (corrosion resistant grease; for propeller shaft) F300A, F350A, FL300A, FL350A ZMU05859...

  • Page 89: Cleaning And Adjusting Spark

    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 90 Maintenance 2. Spark plug I.D. mark (NGK) 3. Spark plug part number 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 91 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) ZMU05932 13. Be sure to fit the 4 positions during in- stallation.

  • Page 92: Inspecting Idling Speed

    3 months, and ev- ery 100 hours or at 1-year intervals there- after. Otherwise the engine will wear quickly. ZMU05930 Consult your Yamaha dealer for replace- ment of the engine oil filter and change of the engine oil. EMU29112 Checking wiring and connectors Check that each grounding wire is properly secured.

  • Page 93: Checking Propeller

    Maintenance EMU29173 Checking propeller EWM01880 WARNING You could be seriously injured if the en- gine accidentally starts when you are near the propeller. Before inspecting, removing, or install- ing the propeller, place the shift control in neutral, turn the main switch to “ ”...

  • Page 94: Installing Propeller

    EWM00800 tion and be lost. WARNING Be sure the outboard motor is securely Apply Yamaha marine grease or a cor- fastened to the transom or a stable rosion resistant grease to the propeller stand. You could be severely injured if shaft.
  • Page 95 Consult a level plug. Yamaha dealer for repair of the lower Tightening torque: unit seals. [ECM00711] 9 Nm (0.9 kgf-m, 6.6 ft-lb)

  • Page 96: Inspecting And Replacing Anode(S)

    Tightening torque: 2 Nm (0.2 kgf-m, 1.5 ft-lb) EMU29312 Inspecting and replacing anode(s) Yamaha outboard motors are protected from corrosion by sacrificial anodes. Inspect the external anodes periodically. Remove scales from the surfaces of the anodes. Consult a Yamaha dealer for replacement of external anodes.

  • Page 97: Connecting The Battery

    Connecting an accessory battery (optional) connections can produce shorting or If connecting an accessory battery, con- arcing and cause an explosion. sult your Yamaha dealer about correct [EWM01910] wiring. It is recommendable to install the EMU35603 fuse to the isolator lead as shown in the Connecting the battery illustration.
  • Page 98 Maintenance Single engine Twin engines ZMU05939 ZMU05941 1. Isolator lead with circuit protection 1. Starboard side engine 2. Red cable 2. Port side engine 3. Black cable 3. Red cable 4. Fuse 4. Black cable 5. Battery for accessories 5. Isolator leads with circuit protection 6.

  • Page 99: Disconnecting The Battery

    Maintenance Triple engines Disconnect the negative cable(s) from the negative (-) terminal. NOTICE: Al- ways disconnect all negative (-) ca- bles first to avoid a short circuit and damage to the electrical system. [ECM01940] Disconnect the positive cable(s) and re- move the battery from the boat.

  • Page 100: Trouble Recovery

    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-alert indicator is flash- Q. Are spark plug(s) fouled or of incorrect ing, consult your Yamaha dealer.
  • Page 101 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.
  • Page 102 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.

  • Page 103: Temporary Action In Emergency

    When using only one or two en- gines in an emergency, be sure to keep the Q. Is steering pivot loose or damaged? unused engine(s) tilted up and operate the A. Tighten or have serviced by a Yamaha other engine(s) at low speed. dealer. ECM01730...

  • Page 104: Replacing Fuse

    3. Spare fuse (10 A, 15 A, 20 A, 30 A, 60 A) of wire could allow excessive current flow. This could cause electric system damage and a fire hazard. Consult your Yamaha dealer if the new fuse immediately blows again. ZMU05875 1. Fuel feed pump fuse (10 A) 2.

  • Page 105: Power Trim And Tilt Will Not Operate

    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-alert indicator EMU35612 Stop the engine.
  • Page 106 Trouble Recovery ZMU05895 Unscrew the filter cup from the filter housing. NOTICE: Be careful not to twist the water detection switch lead when unscrewing the filter cup. [ECM01960] ZMU05892 Disconnect the water detection switch coupler. NOTICE: Be careful not to get any water on the water detection switch coupler, otherwise a malfunc- tion could occur.

  • Page 107: Treatment Of Submerged Motor

    EMU33501 Treatment of submerged motor If the outboard motor is submerged, immedi- ately take it to a Yamaha dealer. Otherwise ZMU05895 some corrosion may begin almost immedi- ately. NOTICE: Do not attempt to run the...
  • Page 108 YAMAHA MOTOR CO., LTD. Printed in Japan April 2008–0.1 × 1 ! Printed on recycled paper...

This manual is also suitable for:

F350aFl300aFl350a

Table of Contents