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Yamaha F50A Owner's Manual
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Yamaha F50A Owner's Manual

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F50A
T50A
OWNER'S MANUAL
U.S.A.Edition
LIT-18626-04-72

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  • Page 1 F50A T50A OWNER’S MANUAL U.S.A.Edition LIT-18626-04-72...
  • Page 3 Therefore, some items may not apply board motor. to every model. EMU01446 F50A/T50A OWNER'S MANUAL ©2001 by Yamaha Motor Corporation, USA 1st Edition, April 2001 All rights reserved. Any reprinting or unauthorized use without the written permission of Yamaha Motor Corporation, USA is expressly prohibited.

  • Page 5: Table Of Contents

    EMA20010 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

    EMB00010 Chapter 1 GENERAL INFORMATION IDENTIFICATION NUMBERS RECORD ..1-1 Outboard motor serial number...1-1 Key number...........1-1 EMISSION CONTROL INFORMATION...1-2 SAFETY INFORMATION......1-4 IMPORTANT LABELS ......1-6 BASIC BOATING RULES ......1-7 FUELING INSTRUCTIONS.....1-11 Gasoline (Petrol).........1-11 ENGINE OIL ..........1-13 BATTERY REQUIREMENT ....1-14 PROPELLER SELECTION .......1-14 START-IN-GEAR PROTECTION ....1-16...

  • Page 8: Identification Numbers Record

    EMU00005 IDENTIFICATION NUMBERS RECORD EMU00007 OUTBOARD MOTOR SERIAL NUMBER YAMAHA MOTOR CO., LTD. MADE IN JAPAN PAYS D'ORIGINE JAPON The outboard motor serial number is stamped on the label attached to the port side of the clamp-bracket. 401012 Record your outboard motor serial num-...

  • Page 9: Emission Control Information

    EMU01385 EMISSION CONTROL INFORMATION EMU01444 NORTH AMERICAN MODELS This engine conforms to U.S. Environ- mental Protection Agency (EPA) regula- tions for marine SI engines. See the label ****** affixed to your engine for details. Approval label of Emission control certificate This label is attached to the bottom cowl- ing.
  • Page 10 EMU01389 STAR LABELS Your outboard motor is labeled with a California Air Resources Board (CARB) star label. See below for a description of your particular label. 1 Star label 000957 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

    8 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 8 Before mounting or operating the out- drowsiness. Keep cockpit and cabin board motor, read this entire manual.
  • Page 12 8 When a swimmer is in the water near you shift into neutral and shut off the engine. 8 Be informed about boating safety. Addi- tional publications and information can be obtained from many organizations, including the following: United States Coast Guard Consumer Affairs Staff (G-BC) Office of Boating, Public, and Consumer Affairs...

  • Page 13: Important Labels

    EMB30011 IMPORTANT LABELS WARNING LABELS WARNING Be sure shift control is in neutral before starting engine. (except 2HP)ê Do not touch or remove electrical partsê 202011** when starting or during operation. Keep hands,hair,and clothes away from flywheel and other rotating parts while engine is running. 6A1-83625-41 CAUTION LABELS CAUTION...

  • Page 14: Basic Boating Rules

    EMB40010* Stand-on vessel BASIC BOATING RULES The vessel with the right-of-way has the duty to continue its course and speed, (Rules of the road) except to avoid an immediate collision. When you maintain your direction and Just as there are rules which apply when speed, the other vessel will be able to you are driving on streets and high ways, determine how best to avoid you.
  • Page 15 RULES WHEN ENCOUNTERING will clear one another if you continue on your set course and speed. VESSELS There are three main situations which you may encounter with other vessels which could lead to a collision unless the Steer- ing Rules are followed: Meeting (you are approaching another vessel head-on) Crossing (you are travelling across the...
  • Page 16 its course and speed. You must stay out Sailing vessel right-of-way of its way until you are clear of it. Like- Sailing vessels should normally be given wise, if another vessel is passing you, you the right-of-way. The exceptions to this should maintain your speed and direction are: so that the other vessel can steer itself...
  • Page 17 tion. These markers are white with black letters and orange boarders. They signify speed zones, restricted areas, danger areas, and general information. Remember, markings may vary by geo- graphic location. Always consult local boating authorities before driving your boat in unfamiliar waters. MAIN CHANNEL BUOYS "...

  • Page 18: Fueling Instructions

    EMB50410 FUELING INSTRUCTIONS GASOLINE AND ITS VAPORS ARE HIGH- LY FLAMMABLE AND EXPLOSIVE! 8 Do not smoke when refueling, and keep away from sparks, flames, or other sources of ignition. 8 Stop engine before refueling. 8 Refuel in a well-ventilated area. Refuel portable fuel tanks off the boat.

  • Page 19: Operation

    If knocking or pinging occurs, use a differ- ent brand of gasoline or premium unlead- ed fuel. Unleaded fuel will give you longer spark plug life and reduced main- tenance cost. If unleaded gasoline is not available, then leaded regular gasoline can be used.

  • Page 20: Engine Oil

    EMU01149 ENGINE OIL Recommended engine oil; Use a combination of corresponding SAE and API shown in the chart below; 104°F _ 20 40°C 10W-30, 10W-40 20W-40 Engine oil quantity: Refer to “SPECIFICATIONS”, Page 4-1. All four-stroke engines are shipped from the factory without engine oil.

  • Page 21: Battery Requirement

    EMU00031 BATTERY REQUIREMENT Do not use the battery that does not meet the specified capacity. If different battery from the specification is used, the electric system may perform poorly or be overloaded, causing electrical system damage. Choose battery which meets the following specifications for Electric start model.
  • Page 22 Yamaha outboard motors are fitted with propellers 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. For a greater operating load, a smaller-pitch propeller is more suitable as it enables the correct engine speed to be main- tained.

  • Page 23: Start-In-Gear Protection

    EMU01209 START-IN-GEAR PROTECTION Yamaha outboard motors or Yamaha approved remote control units equipped with start-in-gear protection device(s). This feature permits the engine to be started only when it is Neutral. Always select Neutral before starting the engine. 1-16...
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  • Page 25: Basic Components

    EMC00010 Chapter 2 BASIC COMPONENTS MAIN COMPONENTS......2-1 OPERATIONS OF CONTROLS AND OTHER FUNCTIONS ........2-2 Fuel tank ..........2-2 Remote control ........2-3 Trim tab ..........2-7 Power trim/tilt switch ......2-8 Trim angle adjusting rod .....2-8 Digital tachometer........2-9 Tilt support lever ........2-12 Top cowling lock lever.......2-12 Flushing device........2-12 WARNING SYSTEM ......2-13 Overheat warning.......2-13...

  • Page 26: Main Components

    EMU01206 MAIN COMPONENTS 1 Top cowling 0 Clamp bracket 2 Cowling lock lever q Tilt support lever 3 Oil drain bolt w Power trim and tilt switch 4 Anodes e Flushing device 5 Anti-cavitation plate r Fuel joint 6 Trim tab (Anode) t Remote control box 7 Propeller y Digital tachometer...

  • Page 27: Operations Of Controls And Other Functions

    EMC20010 OPERATIONS OF CONTROLS OTHER FUNCTIONS EMC21012 FUEL TANK If your model was equipped with a portable fuel tank, its function is as fol- lows. 1 Fuel hose joint 2 Fuel meter (If equipped) 3 Fuel tank cap 4 Air vent screw (If equipped) EMC31010 Fuel hose joint This connector is provided for connecting...

  • Page 28: Remote Control

    EMC80612 REMOTE CONTROL Both the shifter and the throttle are actu- ated by the remote control lever. In addi- tion, this control also has the electrical switches. 1 Remote control lever 2 Neutral interlock trigger 3 Neutral throttle lever 701011* 4 Main switch 5 Engine stop lanyard switch 6 Power trim and tilt switch...
  • Page 29 EMC50210 Neutral throttle lever To open the throttle without shifting into either Forward or Reverse, place the remote control lever in the Neutral posi- tion and lift the neutral throttle lever. NOTE: The neutral throttle lever will operate only when the remote control lever is in Neu- 701033* tral.
  • Page 30 EMC28210 Engine stop lanyard switch The lock-plate on the end of the lanyard must be attached to the engine stop switch for the engine to run. The lanyard should be attached to a secure place on the operator’s clothing, or arm or leg. Should the operator fall overboard or leave the helm, the lanyard will pull out the lock plate, stopping ignition to the...
  • Page 31 EMU01331 Power Trim/Tilt Switch The power trim/tilt adjusts the motor angle in relation to the transom. The power trim/tilt switch is located on the remote control lever grip. Pushing the switch “UP” trims the motor up, then tilts the motor up. Pressing the switch “DN” tilts the motor down and trims the motor 701034* down.

  • Page 32: Trim Tab

    EMU00113 TRIM TAB The trim tab should be adjusted so that the steering control can be turned to either the right or left by applying the same amount of force. An improperly adjusted trim tab may 603011 cause difficult steering. Always test run after the trim tab has been installed or replaced to be sure steering is correct.

  • Page 33: Power Trim/Tilt Switch

    EMU01125 POWER TRIM/TILT SWITCH The power trim/tilt adjusts the motor angle in relation to the transom. The power trim/tilt switch is located on the side of the bottom engine cowling. Push- ing the switch “UP” trims the motor up, then tilts the motor up. Pressing the DOWN switch “DN”...

  • Page 34: Digital Tachometer

    EMU01617 DIGITAL TACHOMETER This gauge contains the tachometer, trim meter, hour meter, low oil pressure warn- ing indicator, and the overheat warning indicator. 1 Tachometer 2 Trim meter 3 Hour meter 001081 4 Low oil pressure warning indicator 5 Overheat warning indicator 6 Set button 7 Mode button NOTE:...
  • Page 35 EMU01109 Trim Meter This meter shows the trim angle of your outboard motor. NOTE: 8 Memorize the trim angles that work best for your boat under different condi- tions. Adjust the trim angle to the desired setting by operating the power 001059 trim and tilt switch.
  • Page 36 EMU01110 Low Oil Pressure Warning Indicator If oil pressure drops too low, the warning indicator will start to blink. Refer to the section “LOW OIL PRESSURE WARNING” for details. 1 Low oil pressure warning indicator 001060 8 Do not operate the engine without oil. Serious engine damage will occur.

  • Page 37: Tilt Support Lever

    EMD60010 TILT SUPPORT LEVER To keep the outboard motor in the tilted- up position, lock the tilt support lever to the clamp bracket. 000971 EMD62110 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.

  • Page 38: Warning System

    EMD80010 WARNING SYSTEM Do not continue to operate the engine if the warning device has activated. Consult your Yamaha dealer if the problem can- not be located and corrected. EMU00170 OVERHEAT WARNING This engine has an overheat warning device. If the engine temperature rises too high, the warning device will activate.

  • Page 39: Low Oil Pressure Warning

    EMU00173 LOW OIL PRESSURE WARNING If oil pressure drops too low, the warning device will activate. (1):Included (—):N/A Activation of Tiller Remote warning device control control model model Engine speed will automatically decrease to about 2,000 r/min. The low oil pressure warning indicator will come on.
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  • Page 41: Operation

    EMF00010 Chapter 3 OPERATION INSTALLATION ........3-1 Mounting the outboard motor....3-2 FILLING FUEL ...........3-4 PRE-OPERATION CHECKS ......3-5 Checking the engine oil level ....3-6 BREAKING IN (RUNNING IN) ENGINE ..3-7 STARTING ENGINE .........3-8 WARMING UP ENGINE ......3-11 SHIFTING ..........3-12 Forward ..........3-12 Reverse..........3-12 STOPPING ENGINE .......3-13 TRIMMING OUTBOARD MOTOR..3-14 Adjusting trim angle ......3-15...

  • Page 42: Installation

    EMF10010 INSTALLATION 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 trans- ducers) can create airborne water spray while the boat is cruising. Severe engine damage may result if the motor is operat- ed continuously in the presence of air- borne water spray.

  • Page 43: Mounting The Outboard Motor

    EMF12012 MOUNTING THE OUTBOARD MOTOR Improper mounting of the outboard motor could result in hazardous condi- tions such as poor handling, loss of con- trol, or fire hazards. Observe the follow- ing: 8 The information presented in this sec- tion is intended as reference only. It is possible provide complete...
  • Page 44 Overpowering a boat may cause severe instability. Do not install an outboard motor with more horsepower than the maximum rating on the capacity plate of the boat. If the boat does not have a capacity plate, consult the boat manufac- turer.

  • Page 45: Filling Fuel

    EMF30211* FILLING FUEL 1) Remove the fuel tank cap. 2) Fill the fuel tank carefully. 3) Close the cap securely after refueling. Wipe up any spilled fuel. EMF21110 902055 Ring Free Fuel Additive Gasoline is a precise blend of many differ- ent substances, each chosen to give cer- tain characteristics.

  • Page 46: Pre-Operation Checks

    EMF40012 PRE-OPERATION CHECKS 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. EMF41110 Fuel 8 Check to be sure you have plenty of fuel for your trip.

  • Page 47: Checking The Engine Oil Level

    EMF43510 Engine 8 Check the engine and engine mounting. 8 Look for loose or damaged fasteners. 8 Check the propeller for damage. Do not start the engine out of water. Overheating and serious engine damage can occur. EMU01436 CHECKING THE ENGINE OIL LEVEL 1) Put the outboard motor in an upright position (not tilted).

  • Page 48: Breaking In (Running In) Engine

    EMF50312 BREAKING IN (RUNNING IN) ENGINE Your new engine requires a period of break-in (running-in) to allow mating sur- faces of moving parts to wear-in evenly. Correct break-in (running-in) will help ensure proper performance and longer engine life. Failure to follow the break-in (running-in) procedure may result in reduced engine life or even severe engine damage.

  • Page 49: Starting Engine

    EMU01147 STARTING ENGINE 8 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 902053 water near you. 8 When the air vent screw is loosened, gasoline (petrol) vapor will be released.
  • Page 50 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 accelerator. After the engine starts, return the 701014 throttle to the fully closed position.
  • Page 51 EMU00949 Electric Start Model START 7) Turn the main switch to “START”, and hold it for a maximum of 5 sec- onds. 8) Immediately after the engine starts, release the main switch to return it to “ON”. 000978 8 Do not turn the main switch to “START”...

  • Page 52: Warming Up Engine

    EMG00410 WARMING UP ENGINE 1) Before beginning operation, allow the engine to warm up at idling speed for 3 minutes. (Failure to do this will shorten engine life.) 2) Be sure the low oil pressure warning lamp goes off after starting the engine.

  • Page 53: Shifting

    EMG20111 SHIFTING Before shifting, make sure there are no swimmers or obstacles in the water near you. 000323 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 54: Stopping Engine

    EMG38010 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 recommended. EMU00276 PROCEDURE Main switch equipped model 1) Turn the main switch to “OFF”. START 701023 2) If the fuel joints are provided, discon-...

  • Page 55: 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.

  • Page 56: Adjusting Trim Angle

    ADJUSTING TRIM ANGLE EMU01401 Power Trim/Tilt Model 8 Be sure all people are clear of the out- board motor when adjusting trim/tilt angle, also be careful not to pinch any body parts between the drive unit and clamp bracket. 8 Use caution when trying a trim position for the first time.
  • Page 57 EMG62010 Bow up When the boat is on plane, a bow-up atti- tude result 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 58: Tilting Up/Down

    EMU01200 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 propeller and casing from damage by collision with obstructions, and also to reduce salt corrosion.
  • Page 59 EMU01029 PROCEDURE FOR TILTING UP Power trim/tilt model 1) Remove the fuel-line connection from the motor. (If the fuel connector is provided on the motor.) 304011* 2) Push the power trim/tilt switch “UP” until the outboard has tilted up com- pletely.

  • Page 60: Cruising In Other Conditions

    EMU00303 PROCEDURE FOR TILTING DOWN Power trim/tilt model 1) Push the power trim/tilt switch “UP” until the engine is supported by the tilt rod. 2) Release the tilt-support lever. 3) Push the power trim/tilt switch “DN” (Down) to lower the engine to the 000979 desired position.

  • Page 61: Maintenance

    EMK00010 Chapter 4 MAINTENANCE SPECIFICATION DATA......4-1 TRANSPORTING AND STORING OUTBOARD MOTOR .......4-3 Trailering outboard motor....4-3 Storing outboard motor ......4-4 PERIODIC MAINTENANCE......4-8 Replacement parts .......4-8 Maintenance chart........4-9 Greasing ..........4-10 Cleaning and adjusting spark plug...4-11 Checking fuel system......4-13 Inspecting fuel filter ......4-14 Adjusting idling speed.......4-16 Changing engine oil ......4-17 Checking timing belt ......4-19...

  • Page 62: Specification Data

    EMK10111* SPECIFICATION DATA Model Unit F50TRA Item DIMENSIONS 8Overall Length mm (in.) 718 (28.3) 8Overall Width mm (in.) 361 (14.2) 8Overall Height mm (in.) 1,397 (55.0) 8Transom height mm (in.) 533 (21.0) 8Weight kg (lb.) 108 (238) PERFORMANCE 8Full throttle operating range r/min 5,000~6,000 8Maximum output...
  • Page 63 T50TRA — — 718 (28.3) 361 (14.2) 1,436 (56.5) 533 (21.0) 112 (247) 5,000~6,000 36.8 (50.0) at 5,500 r/min 900~1,000 4-stroke, L4 935 (57.1) 63.0 75.0 (2.48 2.95) 0.15~0.25 (0.006~0.010) 0.25~0.35 (0.010~0.014) C.D.I system DPR6EA-9 0.8 ~ 0.9 (0.031~0.035) Remote control Electric start 12-70 ~ 100 12-10...

  • Page 64: Transporting And Storing Outboard Motor

    EMU01369 TRANSPORTING AND STORING OUTBOARD MOTOR Leaking fuel is a fire hazard. When trans- porting and storing the outboard motor, close the air vent screw and fuel cock to prevent fuel from leaking. EMU00326 TRAILERING OUTBOARD MOTOR The motor should be trailered and stored in the normal running position.

  • Page 65: Storing Outboard Motor

    EMK16210 STORING OUTBOARD MOTOR When storing your Yamaha outboard for prolonged periods of time, (2 months or longer), several important procedures must be performed to prevent expensive damage. It is advisable to have your outboard ser- viced by an authorized Yamaha dealer prior to storage.
  • Page 66 EMK22611 Flushing Cooling System and Fogging Engine Cooling system flushing is essential to prevent the cooling system from clogging up with salt, sand, or dirt. In addition, fog- ging of the engine is mandatory to pre- vent expensive engine damage due to rust.
  • Page 67 EMK26011 Lubrication 1) Remove the spark plugs, and spray a 10 second spray of Yamaha “Stor- Rite Engine Fogging Oil” into each cylinder. Grease spark plug threads and reinstall the spark plugs and torque to proper specification. (Refer “CLEANING ADJUSTING SPARK PLUG”). 2) Turn the engine over with the stop lanyard disconnected to work the fog- ging oil into the piston rings.
  • Page 68 EMK29010 Battery Care 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 mag- nesia, beaten egg, or vegetable oil.

  • Page 69: Periodic Maintenance

    EMU00913 PERIODIC MAINTENANCE Be sure to turn off the engine when you perform maintenance unless otherwise specified. If the owner is not familiar with machine servicing, this work should be done by a Yamaha dealer or other quali- fied mechanic. Maintenance, replacement, or repair of the emission control devices and systems may be performed by any marine engine...

  • Page 70: Maintenance Chart

    EMK30510* MAINTENANCE CHART Frequency of maintenance operations may be adjusted according to the operating con- ditions, but the following table gives general guidelines. The mark ( ) indicates the check-ups which you may carry out yourself. The mark (1) indicates work to be carried out by your Yamaha dealer. Initial Every Interval...

  • Page 71: Greasing

    EMU00366 GREASING Yamaha marine grease (Water resistant grease) 000567 4-10...

  • Page 72: Cleaning And Adjusting Spark Plug

    EMU01202 CLEANING AND ADJUSTING SPARK PLUG When removing or installing a spark plug, be careful not to damage the insulator. A damaged insulator could allow external sparks, which could lead to explosion or fire. The spark plug is an important engine component and is easy to inspect.
  • Page 73 When fitting the plug, always clean the gasket 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 esti- mate of the correct torque is 1/4 to 1/2 a...

  • Page 74: Checking Fuel System

    EMK38010 CHECKING FUEL SYSTEM Gasoline (petrol) and its vapors are highly flammable and explosive. Keep away from sparks, cigarettes, flames or other sources of ignition. Check the fuel line for leaks, cracks, or malfunctions. If any problem is found, it should be repaired immediately by Yama- ha dealer or other qualified mechanic.

  • Page 75: Inspecting Fuel Filter

    EMU00370 INSPECTING FUEL FILTER Gasoline (petrol) is highly flammable, and its vapors are flammable and explosive. 8 If you have any question about properly doing this procedure, consult your Yamaha dealer. 8 Do not perform this procedure on a hot or running engine.
  • Page 76 5) Attach the filter assembly to the bracket with that the fuel hoses are attached to the filter assembly. 6) Run the engine and check the filter and lines for leaks. EMU01282 NOTE: If any water is in the fuel, the float will rise.

  • Page 77: Adjusting Idling Speed

    EMU00376 ADJUSTING IDLING SPEED 8 Do not touch or remove electrical parts when starting or during operation. 8 Keep hands, hair and clothes away from flywheel and other rotating parts while engine is running. This procedure must be performed while the outboard motor is in the water.

  • Page 78: Changing Engine Oil

    EMU01415 CHANGING ENGINE OIL 8 Avoid draining the engine oil immedi- ately after stopping the engine. The oil is hot and should be handled with care to avoid burns. 8 Be sure the outboard is securely fas- tened to the transom or a stable stand. 8 Change the engine oil after the first 10 hours of operation, and every 100 hours or at 6-month intervals thereafter.
  • Page 79 NOTE: If a torque wrench is not available when you are installing the drain plug, finger tighten the bolt just until the gasket comes into contact with the surface of the drain hole. Then tighten 1/4 - 1/2 turn. Have the drain plug torqued to the correct value with a torque wrench as soon as possible.

  • Page 80: Checking Timing Belt

    6) Turn off the engine and wait 3 min- utes. Recheck the oil level using the dipstick to be sure the level falls between the upper and lower marks. Fill with oil if it is below the lower mark, or drain to the specified level if it is above the upper mark.

  • Page 81: Replacing Fuse

    EMU01329* REPLACING FUSE If the fuse has blown on an Electric start model, open the fuse holder and replace the fuse with a new one of proper amper- age. Be sure to use the specified fuse. An incorrect fuse or a piece of wire may allow excessive current flow.

  • Page 82: Checking Power Trim And Tilt System

    EMU00992 CHECKING POWER TRIM AND TILT SYSTEM 8 Never get under the lower unit while it is tilted, even when the tilt-support lever is locked. Severe injury could occur if the outboard accidentally falls. 8 Make sure no one is under the out- board before performing this test.

  • Page 83: Checking Propeller

    EML08011 CHECKING PROPELLER You could be seriously injured if the engine accidentally starts while you are near the propeller. 8 Before inspecting, removing installing the propeller, remove the 000964 spark plug caps from the spark plugs. Also, put the shift control in Neutral, put the main switch in the “OFF”...
  • Page 84 EMU00397 Installing the Propeller 8 Be sure to install the thrust washer before installing propeller, otherwise, lower case and propeller boss may be damaged. 8 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.

  • Page 85: Changing Gear Oil

    EMU00905* CHANGING GEAR OIL 8 Be sure the outboard is securely fas- tened to the transom or a stable stand. You could be severely injured if the out- board falls on you. 8 Never get under the lower unit while it is tilted, even when the tilt-support lever is locked.

  • Page 86: Cleaning Fuel Tank

    4) With the outboard motor in an verti- cal position, using a flexible or pres- surized filling device, inject the gear oil into the oil drain plug hole. Gear oil grade/capacity: Refer to SPECIFICATIONS on page 4-1. 5) When the oil begins to flow out of the 000566 oil level plug hole, insert and tighten the oil level plug 2.
  • Page 87 To clean the fuel tank 1) Empty the fuel tank into an approved gasoline (petrol) container. 2) Pour a small amount of suitable sol- vent in the tank. Reinstall the cap and shake the tank. Drain the solvent completely. To clean the fuel filter 1) Remove the screws holding the fuel hose joint assembly .

  • Page 88: Inspecting And Replacing Anode(S)

    EMU00831 INSPECTING AND REPLACING ANODE(S) Yamaha outboard motor is protected from corrosion by a sacrificial anode(s). Check the anode(s) periodically. Remove the scales from surfaces of the anode(s). 000982 For the inspection and replacement of the anode(s), consult a Yamaha dealer. Do not paint the anode(s), for this would render it ineffective.

  • Page 89: Checking Battery

    EML26010 CHECKING BATTERY (for Electric start model) Battery electrolytic fluid is dangerous; it contains sulfuric acid and therefore is poi- sonous and highly caustic. Always follow these preventive mea- sures: 8 Avoid bodily contact with electrolytic fluid as it can cause severe burns or permanent eye injury.
  • Page 90 A poorly maintained battery will quickly deteriorate. 1) Check the electrolyte level at least once a month. Fill to the manufactur- er’s recommended level when neces- sary. Top up only with distilled water 901015 (or pure de-ionized water suitable to use in batteries).
  • Page 91 EMU01279 Connecting the Battery 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. 8 Make sure the main switch (on applica- ble models) is “OFF” before working on the battery.

  • Page 92: Checking Bolts And Nuts

    EML40010 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 torques. 2) Check the tightening torques of other bolts and nuts. EMU00409 MOTOR EXTERIOR EMU00410 Cleaning the Outboard Motor After use, wash the exterior of the out-...

  • Page 93: Coating The Boat Bottom

    Do not leave the garden-hose connector loose on the bottom cowling fitting or let the hose hang free during normal opera- tion. Water will leak out of the connector instead of cooling the engine, which can cause serious overheating. Be sure the connector is tightened securely on the fit- ting after flushing the engine.
  • Page 94 -MEMO-...

  • Page 95: Trouble Recovery

    EMN00010 Chapter 5 TROUBLE RECOVERY TROUBLESHOOTING ......5-1 TEMPORARY ACTION IN EMERGENCY ..........5-5 Impact damage........5-5 Power trim/tilt will not operate ...5-5 Starter will not operate ......5-6 Engine fails to operate ......5-8 Treatment of submerged motor ..5-9...

  • Page 96: Troubleshooting

    EMU01204¯ 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 possi- ble 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 97 Trouble Possible Cause Remedy 1. Spark plug(s) fouled or incorrect 1. Inspect spark plug(s). Clean or type. replace with recommended type. 2. Fuel system obstructed. 2. Check for pinched or kinked fuel line or other obstructions in fuel system. 3. Fuel contaminated or stale. 3.
  • Page 98 Trouble Possible Cause Remedy 1. Cooling system clogged. 1. Check water intake for restriction. 2. Engine oil level low. 2. Fill oil tank with specified engine oil. 3. Heat range of spark plug incorrect. 3. Inspect spark plug and replace it with recommended type.
  • Page 99 Trouble Possible Cause Remedy 13. Poor connections or damaged 13. Check wires for wear or breaks. ignition wiring. Tighten all loose connections. Replace worn or broken wires. 14. Failed ignition parts. 14. Have serviced by a Yamaha dealer. 15. Specified engine oil not used. 15.

  • Page 100: Temporary Action In Emergency

    EMN20010 TEMPORARY ACTION IN EMERGENCY EMH80010 IMPACT DAMAGE The outboard motor can be seriously damaged by a collision while operating or trailering. Damage could make the out- board motor unsafe to operate. If the outboard motor hits any object in the water, follow the procedure below;...

  • Page 101: Starter Will Not Operate

    EMN30611 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 emergency starter rope. 8 Use this procedure only in an emer- gency and only to return to port for repairs.
  • Page 102 EMU00429 Emergency Starting Engine 1) Remove the top cowling. 301011 2) Remove the flywheel cover upward. 208013 3) Prepare the engine for starting. See “STARTING ENGINE” for procedures. Be sure the engine is in Neutral and ON START that the lanyard is attached to the engine stop lanyard switch.

  • Page 103: Engine Fails To Operate

    EMU00434 ENGINE FAILS TO OPERATE EMU00442 Cold Engine Fails to Start 1) Place the gear shift lever / remote control lever in the neutral position. 2) Open the throttle halfway (on models with neutral throttle-limiter, open throttle as far as it will go). 701014 3) Start the engine.

  • Page 104: Treatment Of Submerged Motor

    EMU00446 TREATMENT OF SUBMERGED MOTOR If the outboard motor is submerged, immediately take it a Yamaha dealer. Oth- erwise, some corrosion may begin almost immediately. If you cannot immediately take the out- board motor to a Yamaha dealer, follow 000526 the procedure bellow for taking care to minimize engine damage.

  • Page 105: Index

    EMP00010 Chapter 6 INDEX INDEX............6-1...
  • Page 106 EMP10010 Exhaust leakage ........4-20 INDEX Filling fuel ..........3-4 Filling fuel tank .........4-4 Adjusting idling speed ......4-16 Flushing cooling system and Adjusting trim angle......3-15 fogging engine .........4-5 Air vent screw...........2-2 Flushing device ........2-12 Forward...........3-12 Basic boating rules ........1-7 Fueling instructions .......1-11 Battery care..........4-7 Battery requirement ......1-14 Fuel hose joint ..........2-2...

  • Page 107: Propeller Selection

    Trim tab.............2-7 Operations of controls and Trimming outboard motor....3-14 other functions .........2-2 Troubleshooting........5-1 Outboard motor serial number ....1-1 Warming up engine.......3-11 Overheat warning ........2-13 Warning system ........2-13 Overheat warning indicator....2-11 Water leakage.........4-20 Periodic maintenance......4-8 Warranty information ....Next page Power trim/tilt switch .......2-6, 2-8 Power trim/tilt will not operate....5-5 Pre-operation checks .......3-5 Propeller selection .........1-14...
  • Page 108 The terms also apply to original equipment packages sold in Canada, with coverage provided by Yamaha Motor Canada (see ``Warranty Guide'' for Canadian models). This warranty explains the condi- tions of the warranty, including the obligations that your dealer and you as the owner have under the warranty.
  • Page 109 6. If you need any additional information about your Yamaha or warranty coverage which your dealer cannot provide, please contact us directly. Yamaha Motor Corporation, U.S.A. P.O. Box 6555 Cypress, CA 90630 Attention: Customer Relations Department Telephone No.
  • Page 110 Yamaha Motor Corporation, U.S.A. hereby warrants that new Yamaha 1999-or-later model four-stroke outboard motors originally dis- tributed by Yamaha Motor Corporation, U.S.A. will be free from defects in material and workmanship for the period of time stated here- in, subject to certain stated limitations. Warranty coverage for outboards distributed by non-US Yamaha affiliated companies may be different.
  • Page 111 Yamaha Motor Corporation, U.S.A. within ten (10) days of the transfer. YAMAHA MOTOR CORPORATION, U.S.A. MAKES NO OTHER WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH EXCEED THE OBLIGATIONS AND TIME LIMITS STATED IN THIS WARRANTY ARE HEREBY DISCLAIMED BY YAMAHA MOTOR CORPORATION, U.S.A.
  • Page 112 The federal government requires each manufacturer of a motor vehicle to maintain a complete, up-to-date list of all first purchasers against the possibility of a safety-related defect and recall. This list is complied from the purchase registrations sent to Yamaha Motor Corporation, U.S.A.
  • Page 113 EMU01178 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE U.S.A. OR CANADA Welcome to the Yamaha Family! Congratulations on the purchase of your new Yamaha marine power. Yamaha is com- mitted to exceptional customer satisfaction, and we want your ownership experience to be a satisfying one.
  • Page 116 Printed in Japan April 2001—0.7 62Y-28199-18 (F50AET/FT50BET) Printed on recycled paper...

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