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Yamaha F6B Ower's Manual
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Yamaha F6B Ower's Manual

Outboard motor f6b; f8b; t8b
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See also: Owner's Manual
F6B
F8B
T8B
OWNER'S MANUAL
U.S.A.Edition
LIT-18626-05-03

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Summary of Contents for Yamaha F6B

  • Page 1 OWNER’S MANUAL U.S.A.Edition LIT-18626-05-03...
  • Page 3 NOTE: Yamaha. If you have any question about the A NOTE provides key information to make operation or maintenance of your outboard procedures easier or clearer.

  • Page 5: Table Of Contents

    EMU00003 CONTENTS GENERAL INFORMATION BASIC COMPONENTS OPERATION MAINTENANCE TROUBLE RECOVERY INDEX READ THIS OWNER’S MANUAL CAREFULLY BEFORE OPERATING YOUR OUTBOARD MOTOR.

  • Page 7: General Information

    EMU00004 Chapter 1 GENERAL INFORMATION IDENTIFICATION NUMBERS RECORD .............1-1 Outboard motor serial number ....1-1 Key number ..........1-1 EMISSION CONTROL INFORMATION ..1-2 North american models......1-2 Star labels..........1-3 SAFETY INFORMATION ......1-4 IMPORTANT LABELS .......1-6 Warning labels .........1-6 Caution labels...........1-6 BASIC BOATING RULES (Rules of the road)........1-7 Steering and sailing rules and sound signals ............1-7...

  • Page 8: Identification Numbers Record

    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 stolen. 1 Outboard motor serial number...

  • Page 9: Emission Control Information

    EMU01385 EMISSION CONTROL INFORMATION EMU01444 NORTH AMERICAN MODELS This engine conforms to U.S. Environmental Protection Agency (EPA) regulations for marine SI engines. See the label affixed to your engine for details. Approval label of Emission control certif- icate This label is attached to the bottom cowling. 1 Emission control information label New Technology ;...

  • Page 10: Star Labels

    EMU01389 STAR LABELS Your outboard motor is labeled with a Cali- fornia Air Resources Board (CARB) star label. See below for a description of your particular label. 1 Star label One Star - Low Emission The one-star label identifies engines that meet the Air Resources Board’s 2001 exhaust emission standards.

  • Page 11: Safety Information

    This product emits exhaust gases which EMU00917 SAFETY contain carbon monoxide, a colorless, INFORMATION odorless gas which may cause brain damage or death when inhaled. Symp- toms include nausea, dizziness, and Before mounting or operating the out- drowsiness. Keep cockpit and cabin areas board motor, read this entire manual.
  • Page 12 When a swimmer is in the water near you shift into neutral and shut off the engine. Be informed about boating safety. Addi- tional publications and information can be obtained from many organizations, includ- ing the following: United States Coast Guard Consumer Affairs Staff (G-BC) Office of Boating, Public, and Consumer Affairs...

  • Page 13: Important Labels

    EMU00014 IMPORTANT LABELS WARNING LABELS CAUTION LABELS...

  • Page 14: Basic Boating Rules (Rules Of The Road)

    EMU00015 BASIC BOATING RULES Stand-on vessel The vessel with the right-of-way has the duty (Rules of the road) to continue its course and speed, except to avoid an immediate collision. When you Just as there are rules which apply when maintain your direction and speed, the other you are driving on streets and high ways, vessel will be able to determine how best to...

  • Page 15: Rules When Encountering Vessels

    RULES WHEN ENCOUNTERING avoid an accident. You should keep the other vessel on your port (left) side. This VESSELS rule doesn’t apply if both of you will clear There are three main situations which you one another if you continue on your set may encounter with other vessels which course and speed.

  • Page 16: Other Special Situations

    1. When the sailing vessel is overtaking other vessel is expected to maintain its course and speed. You must stay out of its the power-driven vessel, the power- way until you are clear of it. Likewise, if driven vessel has the right-of-way. another vessel is passing you, you should 2.
  • Page 17 Remember, markings may vary by geo- graphic location. Always consult local boat- ing authorities before driving your boat in unfamiliar waters. 1-10...

  • Page 18: Fueling Instructions

    EMU00016 FUELING INSTRUCTIONS WARNING GASOLINE VAPORS HIGHLY FLAMMABLE AND EXPLOSIVE! Do not smoke when refueling, and keep away from sparks, flames, or other sources of ignition. Stop engine before refueling. Refuel in a well-ventilated area. Refuel portable fuel tanks off the boat. Take care not to spill gasoline.

  • Page 19: Gasoline

    Gasohol containing ethanol can be used if ethanol content does not exceed 10% and the fuel meets minimum octane ratings. Gasohol containing methanol is not recommended by Yamaha because it can cause fuel system damage or engine perfor- mance problems. 1-12...

  • Page 20: Engine Oil

    EMU01769 ENGINE OIL Recommended engine oil: 4-stroke motor oil with a combination of cor- responding SAE and API as shown in the chart. Engine oil quantity: See Chapter 4, “Specifications.” CAUTION: All 4-stroke engines are shipped from the factory without engine oil. 1-13...

  • Page 21: Battery Requirement

    EMU01775 BATTERY REQUIREMENT CAUTION: Do not use a battery that does not meet the specified capacity. If a battery which does not meet specifications is used, the electric system could perform poorly or be overloaded, causing electric system damage. For electric start models, choose a battery which meets the following specifications.

  • Page 22: Propeller Selection

    If engine speed is too high or too low for good engine performance, this will have an adverse effect on the engine. Yamaha outboard motors are fitted with pro- pellers chosen to perform well over a range of applications, but there may be uses where a propeller with a different pitch would be more appropriate.

  • Page 23: Start-In-Gear Protection

    3 Type of propeller (propeller mark) Refer to the section “CHECKING PROPEL- LER” for instructions on propeller removal and installation. EMU01209¯ START-IN-GEAR PROTECTION Yamaha outboard motors Yamaha approved remote control units are equipped with start-in-gear protection device(s). This feature permits the engine to be started only when it is Neutral.
  • Page 24 -MEMO- 1-17...

  • Page 25: Basic Components

    EMU00037 Chapter 2 BASIC COMPONENTS MAIN COMPONENTS........2-1 OPERATIONS OF CONTROLS AND OTHER FUNCTIONS........2-3 Fuel tank...........2-3 Choke knob ..........2-3 Recoil starter handle (if equipped) ..........2-4 Starter button (for tiller control model)..2-4 Multifunction tiller handle ......2-4 Remote control.........2-8 Steering friction adjusting lever....2-13 Trim angle adjusting rod ......2-13 Power trim/tilt switch ......2-14 Tilt lock mechanism...

  • Page 26: Main Components

    EMU01206 MAIN COMPONENTS F6A/F8A 1 Top cowling B Gear shift lever 2 Top cowling lock lever C Tiller handle 3 Anti-cavitation plate D Steering friction adjusting lever * 4 Propeller E Tilt lock lever 5 Cooling water inlet F Clamp screw 6 Oil drain bolt G Rope attachment 7 Trim angle adjusting rod...
  • Page 27 1 Top cowling * D Gear shift lever 2 Top cowling lock lever * E Tiller handle 3 Anti-cavitation plate * F Steering friction adjusting lever 4 Propeller * G Tilt lock lever 5 Cooling water inlet H Clamp screw 6 Oil drain bolt I Rope attachment 7 Trim angle adjusting rod...

  • Page 28: Operation

    EMU00039 OPERATIONS OF CONTROLS OTHER FUNCTIONS EMU01465 FUEL TANK If your model included a portable fuel tank, its parts and functions are as follows. 1 Fuel hose joint 2 Fuel meter (if equipped) 3 Fuel tank cap 4 Air vent screw (if equipped) EMU00042 Fuel Hose Joint This connector is provided for connecting or...

  • Page 29: Choke Knob

    EMU00057 Tiller control model CHOKE KNOB Pulling out this knob (setting it to ON) sup- plies a rich mixture required to start the engine. EMU00059 RECOIL STARTER HANDLE (If equipped) Pull the handle gently until resistance is felt. Then vigorously pull the handle straight out to crank the engine to start it.

  • Page 30: Multifunction Tiller Handle

    EMU01122¯ MULTIFUNCTION TILLER HANDLE The tiller handle centralized most of func- tions for the outboard motor operation. 1 Tiller handle 2 Gear shift lever 3 Throttle control grip 4 Throttle indicator 5 Throttle friction adjusting knob 6 Engine stop lanyard switch / Engine stop but- ton (If equipped) 7 Main switch (if equipped) 8 Power tilt switch (if equipped)
  • Page 31 EMU00081 Throttle control grip The throttle control grip is on the tiller han- dle. Turn the grip counterclockwise to increase speed and clockwise to decrease speed. EMU00082 Throttle Indicator The fuel consumption curve on the throttle indicator shows the relative amount of fuel consumed for each throttle position.
  • Page 32 EMU00933 Engine Stop Lanyard Switch The lock-plate 1 must be attached to the engine stop lanyard switch for the engine to run. The lanyard 2 should be attached to a secure place on the operator’s clothing, or arm or leg. Should the operator fall over- board or leave the helm, the lanyard will pull out the lock plate, stopping ignition to the engine.

  • Page 33: Remote Control

    EMU01323 Power Tilt Switch The power tilt adjusts the motor angle in relation to the transom. The power tilt switch is located on the tiller handle. Pushing the switch “UP” tilts the motor up. Pressing the switch “DN” tilts the motor down. When the switch button is released, the motor will stop in its current position.
  • Page 34 EMU00098 Remote Control Lever Moving the lever forward from the Neutral position engages Forward gear. Pulling the lever back from Neutral engages Reverse. The engine will continue to run at idle until the lever is moved about 35° (a detent can be felt).
  • Page 35 EMU00100 Neutral Throttle Lever To open the throttle without shifting into either Forward or Reverse, place the remote control lever in the Neutral position and lift the neutral throttle lever. NOTE: The neutral throttle lever will operate only when the remote control lever is in Neutral. The remote control lever will operate only when the neutral throttle lever is in the closed position.
  • Page 36 EMU00102 Choke Switch While the main switch is being pressed in at “ON” or “START”, the choke system will switch on, to supply a rich mixture required to start the engine. (When the key is released, it will switch off automatically.) EMU00934 Engine Stop Lanyard Switch The lock-plate 1 must be attached to the...
  • Page 37 EMU01316 Power Tilt Switch The power tilt adjusts the motor angle in relation to the transom. The power tilt switch is located on the remote control lever grip. Pushing the switch “UP” tilts the motor up. Pressing the switch “DN” tilts the motor down.

  • Page 38: Steering Friction Adjusting Lever

    EMU01295 STEERING FRICTION ADJUSTING LEVER A friction device provides resistance to steering movement. This is adjustable according to operator preference. Resistance Lever Increase Turn to port Decrease Turn to starboard WARNING Do not overtighten the friction adjusting lever. If there is too much resistance, it may be difficult to steer, which could result in an accident.

  • Page 39: Power Tilt Switch

    EMU01501¯ POWER TILT SWITCH The power tilt adjusts the motor angle in relation to the transom. The power tilt switch is located on top of the steering bracket. Pushing the switch “UP” trims the motor up, then tilts the motor up. Pressing the switch “DN”...

  • Page 40: Tilt Support Knob

    EMU00155 TILT SUPPORT KNOB Power tilt model To keep the outboard motor in the tilted-up position, push the tilt support knob under the swivel bracket. EMU00156¯ TILT SUPPORT BAR The tilt support bar 1 keeps the outboard motor in the tilted up position. EMU01348 POWER TILT UNIT This unit tilts the motor up and down and is...

  • Page 41: Top Cowling Lock Lever

    EMU00161 TOP COWLING LOCK LEVER To remove the engine top cowling, pull up the lock lever. Then lift off the cowling. When replacing the cowling, check to be sure it fits properly in the rubber seal. Then lock the cowling again by moving the lever down- ward.

  • Page 42: Warning System

    If the warning system has been activated, stop the engine as soon as it is safe to do so. Check oil level and add oil as needed. If the oil level is correct, consult your Yamaha dealer. CAUTION: Do not continue to run the engine if the low oil pressure lamp is “ON”.

  • Page 43: Operation

    EMU00174 Chapter 3 OPERATION INSTALLATION ..........3-1 Mounting the outboard motor ....3-2 Clamping the outboard motor....3-4 BREAKING IN (RUNNING IN) ENGINE..3-5 PRE-OPERATION CHECKS .....3-6 Checking the engine oil level....3-7 FILLING FUEL ..........3-8 STARTING ENGINE ........3-9 Procedure for tiller control model...3-10 Procedure for remote control model..3-13 WARMING UP ENGINE ......3-15 CHECKING POINTS AFTER STARTING ENGINE .........3-15...

  • Page 44: Installation

    EMU00175 INSTALLATION CAUTION: Incorrect engine height or obstructions to smooth water flow (such as the design or condition of the boat or accessories such as transom ladders/depth finder transducers) can create airborne water spray while the boat is cruising. Severe engine damage may result if the motor is operated continuously in the presence of airborne water spray.

  • Page 45: Mounting The Outboard Motor

    EMU01478 MOUNTING THE OUTBOARD MOTOR WARNING Overpowering boat cause severe instability. Do not install an out- board motor with more horsepower than the maximum rating on the capac- ity plate of the boat. If the boat does not have a capacity plate, consult the boat manufacturer.
  • Page 46 EMU01298 Mounting Height To run your boat at optimum efficiency, the water-resistance (drag) of the boat and out- board motor must be made as little as possi- ble. The mounting-height of the outboard motor greatly affects the water-resistance. If the mounting-height is too high, cavitation tends to occur, thus reducing the propulsion;...

  • Page 47: Clamping The Outboard Motor

    EMU01318¯ CLAMPING THE OUTBOARD MOTOR 1) Place the outboard on the transom so that it is positioned as close to the cen- ter as possible. Tighten the transom clamp screws evenly and securely. Check the clamp-screws for tightness occasionally during operation of the motor as they can work loose due to engine vibration.

  • Page 48: Breaking In (Running In) Engine

    EMU00224 BREAKING IN (RUNNING IN) ENGINE Your new engine requires a period of break- in (running-in) to allow mating surfaces of moving parts to wear-in evenly. Correct break-in (running-in) will help ensure proper performance and longer engine life. CAUTION: Failure to follow the break-in (running-in) procedure may result in reduced engine life or even severe engine damage.

  • Page 49: Pre-Operation Checks

    EMU00204 PRE-OPERATION CHECKS WARNING If any item in the pre-operation check is not working properly, have it inspected and repaired before operating the out- board motor. Otherwise, an accident could occur. CAUTION: Do not start the engine out of water. Overheating and serious engine damage can occur.

  • Page 50: Checking The Engine Oil Level

    EMU00209 Controls Check throttle, shift, and steering for proper operation before starting the engine. The controls should work smoothly, with- out binding or unusual free play. Look for loose or damaged connections. Check operation of the starter and stop switches when the outboard motor is in the water.

  • Page 51: Filling Fuel

    While many additives available may reduce deposits, Yamaha recommends the use of Ring Free Fuel Additive, available from your Yamaha dealer. Ring Free has repeat- edly proven its ability to clean combustion deposits from inside the engine, notably the critical piston-ring-land area, and fuel sys- tem components.

  • Page 52: Starting Engine

    EMU01461 STARTING ENGINE WARNING Before starting the engine, make sure that the boat is tightly moored and that you can steer clear of any obstruc- tions. Be sure there are no swimmers in the water near you. When the air vent screw is loosened, gasoline (petrol) vapor...

  • Page 53: Procedure For Tiller Control Model

    EMU01497 PROCEDURE FOR TILLER CONTROL MODEL 4) Place the gear-shift lever in the neutral position. NOTE: The start-in-gear protection device prevents the engine from starting except when in Neutral. 5) Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg.
  • Page 54 EMU01514¯ Manual Start Models 7) Pull out the choke knob completely. NOTE: It is not necessary to use the choke when restarting a warm engine. 8) Pull the starter handle slowly until you feel resistance. Then give a strong pull straight out to crank and start the engine.
  • Page 55 EMU01491 Electric Start Models 7) Pull out the choke knob completely. NOTE: It is not necessary to use the choke when restarting a warm engine. If the choke knob is left pulled out, the engine will stall. 8) Push the starter button to start the motor.

  • Page 56: Procedure For Remote Control Model

    EMU01000 PROCEDURE FOR REMOTE CONTROL MODEL 4) Place the remote control lever in the Neutral position. When the engine is warm, open the throttle slightly using the neutral throttle lever or the free acceler- ator. After the engine starts, return the throttle to the fully closed position.
  • Page 57 EMU01512 Electric Start Models 7) Open the throttle slightly lifting the neu- tral throttle lever upwards partially. You may need to change the throttle opening slightly depending on engine tempera- ture. After the engine starts, return the throt- tle to the original position. NOTE: As a starting point, lift the lever just until you feel resistance, then lift slightly more.

  • Page 58: Warming Up Engine

    Over- heating and serious damage could occur. Stop the engine and check if the water inlet on the lower casing is blocked. If the problem cannot be found and corrected, consult your Yamaha dealer. 3-15...

  • Page 59: Shifting

    EMU00261 SHIFTING WARNING Before shifting, make sure there are no swimmers or obstacles in the water near you. CAUTION: To change the shifting position from for- ward to reverse or vice-versa, close the throttle first so that the engine idles (or runs at low speeds).

  • Page 60: Reverse

    EMU01326¯ REVERSE WARNING When operating in Reverse, go slowly. Do not open the throttle more than half. Otherwise, the boat may become unsta- ble, which could result in loss of control and an accident. 1) Place the throttle control grip in the fully closed position (for Tiller control model).

  • Page 61: Stopping Engine

    EMU00273 STOPPING ENGINE Let it cool off for a few minutes at idle or low speed first. Stopping the engine immediately after operating at high speed is not recom- mended. EMU00277¯ 1) Push and hold the engine stop button or turn the main switch to “OFF”.

  • Page 62: Trimming Outboard Motor

    EMU01412 TRIMMING OUTBOARD MOTOR The trim angle of the outboard motor helps determine the position of the bow of the boat in the water. The correct trim angle will help improve performance and fuel economy while reducing strain on the engine. The cor- rect trim angle depends upon the combina- tion of boat, engine, and propeller.

  • Page 63: Adjusting Trim Angle

    ADJUSTING TRIM ANGLE EMU00951 Manual tilt model There are 4 or 5 holes provided in the clamp bracket to adjust the outboard motor trim angle. 1) Stop the engine. 2) Remove the trim angle adjusting rod 1 from the clamp bracket while tilting the motor up slightly.
  • Page 64 EMU01414 Power Tilt Model WARNING Be sure all people are clear of the out- board motor when adjusting the tilt angle, also be careful not to pinch any body parts between the drive unit and clamp bracket. Use caution when trying a trim posi- tion for the first time.
  • Page 65 2) Tilt the engine to the desired angle using the power tilt switch. NOTE: Stay within the trim operating angle when trimming the outboard motor using the power tilt system. To raise the bow (“trim-out”), tilt the engine To lower the bow (“trim-in”), tilt the engine down.
  • Page 66 EMU01558 Bow Up When the boat is on plane, a bow-up atti- tude results in less drag, greater stability and efficiency. This is generally when the keel line of the boat is up about 3 to 5 degrees. When trimmed out, the boat may have more tendency to steer to one side or the other.

  • Page 67: Tilting Up/Down

    EMU00285 TILTING UP/DOWN If the engine will be stopped for some time, or if the boat is moored in shallows, the engine should be tilted up to protect the pro- peller and casing from damage by collision with obstructions, and also to reduce salt corrosion.

  • Page 68: Procedure For Tilting Up

    EMU00290 PROCEDURE FOR TILTING UP Manual tilt model 1) Place the gear shift lever in Neutral. 2) Remove the fuel line connection from the motor. 3) Place the tilt lock lever in the release position. 4) Hold the rear of the top cowling with one hand and fully tilt the engine up.

  • Page 69: Procedure For Tilting Up

    EMU01573 PROCEDURE FOR TILTING UP Power tilt models 1) Disconnect the fuel line or close the fuel cock. 2) Push the power tilt switch “UP” until the outboard has tilted up completely. 3-26...

  • Page 70: Procedure For Tilting Down

    3) Push the tilt support knob into the clamp bracket to support the engine. WARNING After tilting the engine, be sure to sup- port it with the tilt support knob. Oth- erwise, the engine could fall back down suddenly if oil in the power tilt unit should lose pressure.

  • Page 71: Cruising In Shallow Water

    EMU01370 CRUISING IN SHALLOW WATER Manual tilt model The outboard motor can be tilted up partially to allow operation in shallow water. WARNING Place the gear shift in the Neutral posi- tion before using the shallow water cruising system. Run the boat at the lowest possible speed when using the shallow water cruising system.

  • Page 72: Procedure

    EMU00310 PROCEDURE 1) Place the gear shift lever in the neutral position. 2) Place the tilt lock lever in the release position. 3) Slightly tilt up the engine. The tilt-sup- port bar will lock automatically, support- ing the engine in a partially raised position.

  • Page 73: Cruising In Shallow Water

    EMU01319 CRUISING IN SHALLOW WATER Power tilt model The engine can be tilted up partially to allow operation in shallow water. WARNING Place the gear shift in the Neutral posi- tion before setting for shallow water cruising. Return the engine to its normal posi- tion as soon as the boat is back in deeper water.
  • Page 74 2) Slightly tilt up the engine using the power tilt switch. 3-31...

  • Page 75: Cruising In Other Conditions

    EMU00316 CRUISING IN OTHER CONDITIONS CRUISING IN SALT WATER After operating in salt water, wash out the cooling-water passages with fresh water to prevent them from becoming clogged-up with salt deposits. NOTE: Refer to cooling system flushing instructions in “TRANSPORTING AND STORING OUT- BOARD MOTOR”.
  • Page 76 -MEMO- 3-33...

  • Page 77: Maintenance

    EMU00317 Chapter 4 MAINTENANCE SPECIFICATIONS ........4-1 TRANSPORTING AND STORING OUTBOARD MOTOR.........4-4 Trailering outboard motor ......4-4 Transporting outboard when unmounted ..........4-5 Storing outboard motor ......4-5 PERIODIC MAINTENANCE.....4-10 Replacement parts.........4-10 Maintenance chart .........4-11 Greasing..........4-12 Cleaning and adjusting spark plug ..4-13 Checking fuel system......4-15 Inspecting fuel filter ........4-16 Adjusting idling speed......4-17 Changing engine oil .......4-18...

  • Page 78: Specifications

    EMU01870¯ SPECIFICATIONS Model Unit F6MHB Item DIMENSIONS Overall length mm (in.) 927 (36.5) Overall width mm (in.) 350 (13.8) Overall height S/L/X mm (in.) 998 (39.3)/1,125 (44.3)/– Transom height S/L/X mm (in.) 435 (17.1)/562 (22.1)/– Weight S/L/X kg (lb.) 38 (84)/39.5 (87)/– PERFORMANCE Full throttle operating range r/min...
  • Page 79 F8MHB T8PHB T8EHB 1,038 (40.9) 1,038 (40.9) 1,038 (40.9) 371 (14.6) 371 (14.6) 371 (14.6) 998 (39.3)/1,125 (44.3)/– –/1,187 (46.7)/1,255 (49.4) –/1,187 (46.7)/1,255 (49.4) 435 (17.1)/562 (22.1)/– –/557 (21.9)/625 (24.6) –/557 (21.9)/625 (24.6) 38 (84)/39.5 (87)/– –/52 (115)/53 (117) –/46.5 (103)/47.5 (105) 5,000–6,000 5,000–6,000 5,000–6,000...
  • Page 80 Model Unit T8PRB Item DIMENSIONS Overall length mm (in.) 552 (21.7) Overall width mm (in.) 312 (12.3) Overall height S/L/X mm (in.) –/1,187 (46.7)/1,255 (49.4) Transom height S/L/X mm (in.) –/557 (21.9)/625 (24.6) Weight S/L/X kg (lb.) –/49 (108)/50 (110) PERFORMANCE Full throttle operating range r/min...

  • Page 81: Storing Outboard Motor

    For further details, consult your Yamaha dealer. WARNING Never get under the lower unit while it is tilted, even if a motor support bar is used.

  • Page 82: Transporting Outboard When Unmounted

    EMU00883 STORING OUTBOARD MOTOR When storing your Yamaha outboard for pro- longed periods of time, (2 months or longer), several important procedures must be per- formed to prevent expensive damage. It is...
  • Page 83 EMU00335 Filling Fuel Tank Fill the fuel tank with fresh fuel and add one ounce of “Yamaha Fuel Conditioner and Sta- bilizer” (Part No. LUB-FUELC-12-00) to each gallon of fuel. NOTE: The use of “Yamaha Fuel Conditioner and Stabilizer” eliminates the need to drain the fuel system.
  • Page 84 4) Run the engine at a fast idle for 10~15 minutes. 5) Just prior to turning off the engine, quickly spray “Yamaha Stor-Rite Engine Fogging Oil” (Part No. LUB-STRRT-12-00) into the silencer cover. When properly done, the engine will smoke excessively and almost stall.
  • Page 85 1) Wash down the exterior of the outboard with fresh water and dry off completely. 2) Spray engine’s exterior with “Yamaha Silicone Protectant” (Part No. LUB-SILCNE-13-00). 3) Wax the cowling with a non-abrasive wax such as “Yamaha Silicone Wax” (Part No. ACC-11000-15-02).
  • Page 86 EMU01545 Battery Care WARNING Battery electrolyte is poisonous and dan- gerous, causing severe burns, etc. It con- tains sulfuric acid. Avoid contact with skin, eyes, or clothing. Antidote: EXTERNAL: Flush with water. INTERNAL: Drink large quantities of water or milk. Follow with milk of magne- sia, beaten egg, or vegetable oil.

  • Page 87: Periodic Maintenance

    If you or the owner is not famil- iar with machine servicing, this work should be done by a Yamaha dealer or other qualified mechanic. A service manual is available for purchase through a Yamaha dealer for owners who...

  • Page 88: Maintenance Chart

    Frequency of maintenance operations may be adjusted according to the operating condi- tions, but the following table gives general guidelines. The mark (G) indicates the check-ups which you may carry out yourself. The mark (❍) indicates work to be carried out by your Yamaha dealer. Interval Initial...
  • Page 89 EMU00366 GREASING Yamaha marine grease (Water resistant grease) 4-12...

  • Page 90: Cleaning And Adjusting Spark Plug

    Do not attempt to diagnose any problems your- self. Instead, take the outboard 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.
  • Page 91 When fitting the plug, always clean the gas- ket surface and use a new gasket. Wipe off any dirt from the threads and screw in the spark plug to the correct torque. Spark plug torque: Refer to “SPECIFICATIONS”, page 4-1. NOTE: If a torque-wrench is not available when you are fitting a spark plug, a good estimate of...

  • Page 92: Checking Fuel System

    Check the fuel line for leaks, cracks, or mal- functions. If any problem is found, it should be repaired immediately by Yamaha dealer or other qualified mechanic. Checkpoints Fuel system parts leakage.

  • Page 93: Inspecting Fuel Filter

    EMU00374¯ Check the fuel filter periodically. The fuel filter is a one-piece, disposable type. If foreign matter is found in the filter, replace it. For replacement of the fuel filter, consult a Yamaha dealer. 4-16...

  • Page 94: Adjusting Idling Speed

    Correct idling-speed adjustment is only pos- sible if the engine is fully warmed-up. If not warmed up fully, the speed setting will tend to be too high. If you have difficulty obtaining the specified idle, consult a Yamaha dealer or other qualified mechanic. 4-17...

  • Page 95: Changing Engine Oil

    EMU01415¯ CHANGING ENGINE OIL WARNING Avoid draining the engine oil immedi- ately after stopping the engine. The oil is hot and should be handled with care to avoid burns. Be sure the outboard is securely fas- tened to the transom or a stable stand. CAUTION: Change the engine oil after the first 10 hours of operation, and every 100...
  • Page 96 Continued operation with a prob- lem could cause severe engine damage. If the problem cannot be found and cor- rected, consult your Yamaha dealer. 6) Turn off the engine and wait 3 minutes. Recheck the oil level using the dipstick to be sure the level falls between the upper and lower marks.

  • Page 97: Checking Timing Belt

    Signs of wear on edges or outer surface of belt. Stretching by 10 mm (0.39 in) or more when the belt is pushed with a finger. CAUTION: Consult your Yamaha dealer for replacing the timing-belt. EMU01315 REPLACING FUSE If the fuse has blown on an Electric start...

  • Page 98: Checking Wiring And Connectors

    EMU00383 CHECKING WIRING AND CONNECTORS 1) Check that each grounding wire is prop- erly secured. 2) Check that each connector is engaged securely. EMU00384 EXHAUST LEAKAGE Start the engine and check that no exhaust leaks from the joints between the exhaust cover, cylinder head and crank case.

  • Page 99: Checking Power Tilt System

    4) Check that the tilt rod is free of corrosion or other flaws. 5) Operate the motor to tilt down. Check that the tilt rod operates smoothly. NOTE: If any operation is abnormal, consult a Yamaha dealer. Recommended fluid; Yamaha power trim & tilt fluid or ATF (DEXRON-II) 4-22...

  • Page 100: Checking Propeller

    EMU00388 CHECKING PROPELLER WARNING You could be seriously injured if the engine accidentally starts while you are near the propeller. Before inspecting, removing or install- ing the propeller, remove the spark plug caps from the spark plugs. Also, put the shift control in Neutral, put the main switch in the “OFF”...
  • Page 101 Be sure to use a new cotter pin and bend the ends over securely, other- wise, the propeller could come off dur- ing operation and be lost. 1) Apply Yamaha Marine grease or Corro- sion resistant grease to the propeller shaft. 2) Install the spacer, washer and propeller on the propeller shaft.

  • Page 102: Changing Gear Oil

    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 repair of the lower unit seals. NOTE: For disposal of used oil consult your Yamaha dealer. 4-25...
  • Page 103 5) With the outboard motor in a vertical position, and using a flexible or pressur- ized filling device, inject the gear oil into the oil drain plug hole. Gear oil grade/capacity: Refer to “SPECIFICATIONS,” page 4-1. 6) When the oil begins to flow out of the oil level plug hole, insert and tighten the oil level plug.

  • Page 104: Cleaning Fuel Tank

    If you have any question about prop- erly doing this procedure, consult your Yamaha dealer. Keep away from sparks, cigarettes, flames or other sources of ignition when cleaning the fuel tank. Remove the fuel tank from the boat before cleaning it.
  • Page 105 EMU01462 F6/F8 INSPECTING AND REPLACING ANODE(S) Yamaha outboard motors are protected from corrosion by sacrificial anodes. Check the anodes periodically. Remove scales from the surfaces of the anodes. For inspection and replacement of anodes, consult a Yamaha dealer. CAUTION: Do not paint anodes, as this would ren- der them ineffective.

  • Page 106: Checking Battery

    EMU00404 CHECKING BATTERY (for Electric start model) WARNING Battery electrolytic fluid is dangerous; it contains sulfuric acid and therefore is poisonous and highly caustic. Always follow these preventive mea- sures: Avoid bodily contact with electrolytic fluid as it can cause severe burns or permanent eye injury.
  • Page 107 1) Check the electrolyte level at least once a month. Fill to the manufacturer’s rec- ommended level when necessary. Top up only with distilled water (or pure de- ionized water suitable to use in batter- ies). 2) Keep the battery always in a good state of charge.
  • Page 108 EMU01279¯ Connecting the Battery WARNING Mount the battery holder securely in a dry, well-ventilated, vibration-free loca- tion in the boat. Install a fully charged battery in the holder. CAUTION: Make sure the main switch (on applica- ble models) is “OFF” before working on the battery.

  • Page 109: Checking Bolts And Nuts

    EMU00408 CHECKING BOLTS AND NUTS 1) Check that bolts securing the cylinder head and engine and the nut securing the flywheel are tightened with their specified tightening torque. 2) Check the tightening torque of other bolts and nuts. 4-32...

  • Page 110: Cleaning Cooling-Water Passages

    EMU01172 CLEANING COOLING-WATER PASSAGES Flushing device equipped model Perform this procedure right after operation for the most thorough flushing. 1) After shutting off the engine, unscrew the garden-hose connector 2 from the fitting 1 on the bottom cowling. 2) Screw the garden-hose connector 2 onto a garden hose 3 which is con- nected to a fresh-water supply.

  • Page 111: Motor Exterior

    Check the motor for scratches, nicks, or flak- ing paint. Areas with damaged paint are more likely to corrode. If necessary, clean and paint the areas. A touch-up paint is available from a Yamaha dealer. EMU00413 COATING THE BOAT BOTTOM A clean hull improves boat performance. The boat bottom should be kept as clean of marine growths as possible.
  • Page 112 -MEMO- 4-35...

  • Page 113: Trouble Recovery

    EMU00414 Chapter 5 TROUBLE RECOVERY TROUBLESHOOTING .......5-1 TEMPORARY ACTION IN EMERGENCY ..........5-4 Impact damage ........5-4 Power tilt will not operate......5-4 Starter will not operate ......5-5 Engine fails to operate ......5-8 Treatment of submerged motor....5-9...

  • Page 114: Troubleshooting

    A problem in the fuel, compression, or ignition systems can cause poor starting, loss of power, or other problems. The troubleshooting chart describes basic checks and possible remedies. (This chart covers all Yamaha outboard motors. Therefore, some items may not apply to your model.) If your outboard motor requires repair, bring it to a Yamaha dealer.
  • Page 115 3. Fill tank with clean, fresh fuel. 4. Fuel filter clogged. 4. Clean or replace filter. 5. Failed ignition parts. 5. Have serviced by a Yamaha dealer. 6. Warning system activated. 6. Find and correct cause of warning. 7. Spark plug gap incorrect.
  • Page 116 3. Remove and clean propeller. on propeller. F. Engine vibrates excessively. 4. Motor mounting bolt loose. 4. Tighten bolt. 5. Clamp screw is loose. 5. Tighten the clamp screw. 6. Steering pivot loose or damaged. 6. Tighten or have serviced by a Yamaha dealer.

  • Page 117: Temporary Action In Emergency

    3) Whether damage is found or not, return to the nearest harbor slowly and care- fully. 4) Have a Yamaha dealer inspect the out- board motor before operating it again. EMU01321 POWER TILT WILL NOT OPERATE If the engine cannot be tilted up or down...
  • Page 118 EMU00423 STARTER WILL NOT OPERATE If the starter mechanism does not operate (engine cannot be cranked with the starter), the engine can be started with an emer- gency starter rope. WARNING Use this procedure only in an emer- gency and only to return to port for repairs.
  • Page 119 EMU01513¯ Emergency Starting Engine 1) Remove the top cowling. 2) Remove the start-in-gear protection cable from the starter if equipped. 3) Remove the starter/flywheel cover after removing the bolt(s). 4) Prepare the engine for starting. Refer to “STARTING ENGINE” for details. Be sure the engine is in Neutral and that the lock plate is attached to the engine stop lanyard switch.
  • Page 120 5) Insert the knotted end of the emergency starter rope into the notch in the fly- wheel rotor and wind the rope 1 or 2 turns clockwise. 6) Give a strong pull straight out to crank and start the engine. Repeat if neces- sary.

  • Page 121: Engine Fails To Operate

    EMU01363 ENGINE FAILS TO OPERATE If the engine stops unexpectedly, or if the engine does not start, you may attempt to use the following emergency circuit proce- dure. Before using this procedure, be sure to check the “TROUBLESHOOTING” section to eliminate causes such as low fuel or over- heating.

  • Page 122: Treatment Of Submerged Motor

    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. EMU00448 1) Thoroughly wash away mud, salt, sea- weed, etc.

  • Page 123: Index

    EMU00450 Chapter 6 INDEX INDEX ............6-1...
  • Page 124 EMU00451 INDEX Electric start models ........3-14 Electric Start Models........3-12 Emergency starting engine......5-6 Emission control information ......1-2 Adjusting idling speed........4-17 Engine ............. 3-7 Adjusting trim angle ........3-20 Engine fails to operate........5-8 Air vent screw ..........2-3 Engine oil............

  • Page 125: Power Trim/Tilt Switch

    Manufactured date label ........1-2 Specifications ..........4-1 Meeting ............1-8 Stand-on vessel..........1-7 Motor exterior..........4-34 Star labels............1-3 Mounting height ..........3-3 Starter button (for tiller control model) ..... 2-4 Mounting the outboard motor......3-2 Starter will not operate........5-5 Multifunction tiller handle .........
  • Page 126 1. Be sure your new Yamaha is registered for warranty. Your boat dealer should do this at the time of sale. Make sure your dealer gives you a copy of the completed Yamaha reg- istration card for your records.
  • Page 127 However, some products available in one country may not be sold or serviced in the other. 6. If you need any additional information about your Yamaha or warranty coverage which your dealer cannot provide, please contact us directly.
  • Page 128 Yamaha Motor Corporation, U.S.A. hereby warrants that new Yamaha 1999-or-later model four-stroke outboard motors originally distrib- uted by Yamaha Motor Corporation, U.S.A. will be free from defects in material and workmanship for the period of time stated herein, sub- ject to certain stated limitations. Warranty coverage for outboards distributed by non-US Yamaha affiliated companies may be different.
  • Page 129 Charges for removal of the motor from a boat and transporting the motor to and from an authorized Yamaha Outboard Motor Dealer are excluded from warranty coverage.
  • Page 130 Yamaha outside the U.S.A. or Canada, please contact an authorized Yamaha dealer in your country. 2. Keep a copy of your sales contract or invoice for the purchase of your Yamaha and present it if you need warranty repairs. This document should show the date of pur- chase, which is important evidence the repairing dealer will need to be sure your Yamaha is covered by warranty.
  • Page 132 YAMAHA MOTOR CORPORATION, USA Printed in Japan March 2002–1.0 × 1 CR 68T-28199-14 (F6AMH, F8CMH, FT8DEHP, FT8DWH, FT8DEP) Printed on recycled paper...
  • Page 133 (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...
  • Page 134 PLACE POSTAGE HERE ATTN: WARRANTY DEPARTMENT...

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