Yamaha 40A Owner'S Manual Download Page 117

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5-4

Trouble

Possible Cause

Remedy

13. Poor connections or damaged

ignition wiring.

14. Failed ignition parts.

15. Specified engine oil not used.

16. Thermostat faulty or clogged.

17. Air vent screw closed.

18. Fuel pump damaged.

19. Fuel joint connection incorrect.

20. Heat range of spark plug incorrect.

13. Check wires for wear or breaks.

Tighten all loose connections.

Replace worn or broken wires.

14. Have serviced by a Yamaha

dealer.

15. Check and replace oil with

specified type.

16. Have serviced by a Yamaha

dealer.

17. Open the air vent screw.

18. Have serviced by a Yamaha

dealer.

19. Connect correctly.

20. Inspect spark plug and replace it

with recommended type.

E. Engine power loss.

F. Engine vibrates

excessively.

1. Propeller damaged.

2. Propeller shaft damaged.

3. Weeds or other foreign matter

tangled on propeller.

4. Motor mounting bolt loose.

5. Steering pivot loose or damaged.

1. Have propeller repaired or

replaced.

2. Have serviced by a Yamaha

dealer.

3. Remove and clean propeller.

4. Tighten bolt.

5. Tighten or have serviced by a

Yamaha dealer.

63B-9-19-5 (E) 4/18/01 11:41 AM Page 5

Summary of Contents for 40A

Page 1: ...40A 50A LIT 18626 04 55 40A 50A OWNER S MANUAL U S A Edition ...

Page 2: ......

Page 3: ...ecial precautions that must be taken to avoid damage to the outboard motor NOTE A NOTE provides key information to make procedures easier or clearer Yamaha continually seeks advance ments in product design and quality Therefore while this manual contains the most current product information available at the time of printing there may be minor discrepancies between your machine and this manual If t...

Page 4: ......

Page 5: ...GENERAL INFORMATION BASIC COMPONENTS OPERATION MAINTENANCE TROUBLE RECOVERY INDEX EMA20010 CONTENTS READ THIS OWNER S MANUAL CAREFULLY BEFORE OPERATING YOUR OUTBOARD MOTOR 1 2 3 4 5 6 E ...

Page 6: ......

Page 7: ...board motor serial number 1 1 Key number 1 1 EMISSION CONTROL INFORMATION 1 2 SAFETY INFORMATION 1 3 IMPORTANT LABELS 1 5 BASIC BOATING RULES 1 6 FUELING INSTRUCTIONS 1 10 Gasoline petrol 1 11 Engine oil 1 11 BATTERY REQUIREMENT 1 12 PROPELLER SELECTION 1 13 START IN GEAR PROTECTION 1 14 1 ...

Page 8: ...ber in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in case your out board motor is stolen 1 Outboard motor serial number EMU00008 KEY NUMBER If main key switch is equipped your key identification number is stamped on your key as shown in the illustration Record this number in the space provided for ref erence if you need a new key 1 Key number...

Page 9: ...mission control certificate This label is attached to the bottom cowl ing 1 Emission control information label Existing Technology N A Manufactured date label This label is attached to the clamp bracket or the swivel bracket 2 Manufactured date label EMISSION CONTROL INFORMATION ENGINE FAMILY THIS ENGINE CONFORMS TO 2001 U S EPA REGULATIONS FOR MARINE SI ENGINES FELs SPARK PLUG IDLE SPEED rpm IN N...

Page 10: ...fully Make sure there are no gas fumes or leaking fuel before starting the engine Q 8 This product emits exhaust gases which contain carbon monoxide a colorless odorless gas which may cause brain damage or death when inhaled Symp toms include nausea dizziness and drowsiness Keep cockpit and cabin areas well ventilated Avoid blocking exhaust outlets 8 Check throttle shift and steering for proper op...

Page 11: ...ny organizations including the following United States Coast Guard Consumer Affairs Staff G BC Office of Boating Public and Consumer Affairs U S Coast Guard Headquarters Washington D C 20593 0001 Boating Safety Hotline 1 800 368 5647 National Marine Manufacturers Association NMMA 401 N Michigan Ave Chicago Il 60611 Marine Retailers Association of America 155 N Michigan Ave Chicago Il 60601 ...

Page 12: ...7 41 WARNING Be sure shift control is in neutral before starting engine except 2HP ê Do not touch or remove electrical partsê when starting or during operation Keep hands hair and clothes away from flywheelê and other rotating parts while engine is running 6A1 83625 41 E 1 5 EMB30011 IMPORTANT LABELS WARNING LABELS 1 2 202016 q 202015 q 504011 w ...

Page 13: ... dened vessel These rules determine which vessel has the right of way and what each vessel should do Stand on vessel The vessel with the right of way has the duty to continue its course and speed except to avoid an immediate collision When you maintain your direction and speed the other vessel will be able to determine how best to avoid you Give way vessel The vessel which does not have the right ...

Page 14: ... are close enough to run the risk of collision neither of you has the right of way Both of you should alter course to avoid an accident You should keep the other vessel on your port left side This rule doesn t apply if both of you will clear one another if you continue on your set course and speed Crossing When two power driven vessels are crossing each other s path close enough to run the risk of...

Page 15: ...he passage of other vessels in narrow channels 1 8 Sailing vessel right of way Sailing vessels should normally be given the right of way The exceptions to this are 1 When the sailing vessel is overtaking the power driven vessel the power driven vessel has the right of way 2 Sailing vessels should keep clear of any fishing vessel 3 In a narrow channel a sailing vessel should not hamper the safe pas...

Page 16: ...ncreasing toward head of naviga tion Leave to starboard right proceeding up stream White Light Red Light A LIGHTED SAFE WATER BUOY No number Marks midchannel pass on either side Letter has no lateral significance used for No number Topmost band red preferred Top Mark White Light White Light OR OR LIGHTED PREFERRED CHANNEL TO RB L RG L PORT BUOY identification and location purposes channel is to le...

Page 17: ...tely with dry rags 8 Do not overfill the fuel tank 8 Tighten the filler cap securely after refueling 8 If you should swallow some gasoline inhale a lot of gasoline vapor or get gasoline in your eyes get immediate medical attention 8 If any gasoline spills onto your skin immediately wash with soap and water Change clothing if gasoline spills on it 8 Touch the fuel nozzle to the filler open ing or f...

Page 18: ...n be used if ethanol content does not exceed 10 and the fuel meets minimum octane ratings Gasohol containing methanol is not recommended by Yama ha because it can cause fuel system dam age or engine performance problems E 1 11 Recommended gasoline Regular unleaded gasoline with a mini mum octane rating of 86 Pump Octane Number R M 2 EMU00858 ENGINE OIL If the recommended engine oil is not availabl...

Page 19: ...ery 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 Minimum cold crank performance 400 Amps at 17 8 C 0 F Minimum reserve capacity 85 minutes at 26 7 C 80 F E 1 12 ...

Page 20: ...dverse effect on the engine 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 Conversely a larger pitch pro peller is more suitabl...

Page 21: ...s rpm should be within the upper half of the full throttle operating range as listed in SPECIFICA TIONS on page 4 1 Select a propeller which fulfills this requirement If operating under conditions which allow the engine s rpm to rise above the maxi mum recommended range such as light boat loads reduce the throttle setting to maintain the rpm in the proper operating range 1 Propeller diameter in in...

Page 22: ...E MEMO ...

Page 23: ...knob 2 11 Recoil starter handle 2 11 Steering friction adjusting screw 2 12 Trim angle adjusting rod 2 12 Shallow water lever 2 13 Power trim tilt switch 2 13 Warning indicator 2 14 Digital tachometer 2 15 Trim tab 2 18 Tilt lock mechanism 2 19 Tilt support lever 2 20 Top cowling lock lever 2 20 WARNING SYSTEM 2 21 Overheat warning 2 21 Oil level warning oil filter clogging warning 2 22 ...

Page 24: ...ing indicator lamp Oil Overheat 5 Tilt lock lever 6 Transom clamp handle 7 Clamp bracket 8 Trim angle adjusting rod 9 Cooling water inlet 0 Propeller q Trim tab Anode w Anti cavitation plate e Anode r Tilt support lever t Shallow water lever y Top cowling May not be exactly as shown also may not be included as standard equipment on all models ...

Page 25: ... Clamp bracket 4 Battery lead 5 Anode 6 Cooling water inlet 7 Propeller 8 Trim tab Anode 9 Anti cavitation plate 0 Anode q Trim angle adjusting rod w Tilt support lever e Top cowling r Remote control box t Digital tachometer May not be exactly as shown also may not be included as standard equipment on all models ...

Page 26: ...screw If equipped EMC31010 Fuel hose joint This connector is provided for connecting or disconnecting fuel hose EMC41110 Fuel meter This meter is on the fuel tank cap It shows current fuel quantity in the fuel tank approximately EMC51010 Fuel tank cap This cap is for filling fuel To remove it turn it counterclockwise EMC61010 Air vent screw This screw is on the fuel tank cap To loosen it turn it c...

Page 27: ...he tiller handle sideways to adjust the steering direction 501021 501025 q e w 501022 q e t y w 501015 r EMU00081 Throttle control grip The throttle control grip is on the tiller handle Turn the grip counterclockwise to increase speed and clockwise to decrease speed EMU00080 Gear shift lever Turning the gear shift lever forward bow side engages the clutch with the forward gear so that the boat mov...

Page 28: ...to movement of the throttle grip This is adjustable for operator preference An adjusting knob is located on the left port side of tiller handle When constant speed is desired tighten the adjusting knob to maintain the desired throttle setting w Do not overtighten the friction adjusting knob If there is too much resistance it may be difficult to move the throttle grip which could result in an accid...

Page 29: ...er w 8 Attach the engine stop switch lanyard to a secure place on your clothing your arm or leg while operating 8 Do not attach the lanyard to clothing that could tear loose Do not route the lanyard in such a way that it could become entangled preventing it from functioning 8 Avoid accidentally pulling the lanyard during normal operation Loss of engine power means the loss of most steering control...

Page 30: ...ch if equipped 7 Throttle friction adjusting screw 701011 w q e r t y u R N F q w e r t y u u t r y 701031 EMC50010 Remote control lever Moving the lever forward from the Neu tral position engages Forward gear Pulling the lever back from Neutral engages Reverse The engine will contin ue to run at idle until the lever is moved about 35 a detent can be felt Moving the lever farther opens the throttl...

Page 31: ...lever will operate only when the remote control lever is in Neu tral The remote control lever will operate only when the neutral throttle lever is in the closed position 1 Fully open 2 Fully closed N 701033 w q 701036 ON START OFF 701021 EMC48110 Main switch The main switch controls the ignition sys tem its operation is described below 8 OFF Electrical circuits switched off The key can be removed ...

Page 32: ...te 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 down When the switch button is released the motor will stop in its current position NOTE Refer to the sections ADJUSTING TRIM ANGLE and TILTING UP DOWN in Chapter 3 for instructions on usage UP DN 701034 UP DN ...

Page 33: ...wer w 8 Attach the engine stop switch lanyard to a secure place on your clothing your arm or leg while operating 8 Do not attach the lanyard to clothing that could tear loose Do not route the lanyard in such a way that it could become entangled preventing it from functioning 8 Avoid accidentally pulling the lanyard during normal operation Loss of engine power means the loss of most steering contro...

Page 34: ...n adjusting screw If there is too much resistance it may be difficult to move the lever which could result in an accident Resistance Screw Increase Turn clockwise Decrease Turn counterclockwise 701035 EMC42210 CHOKE KNOB 40 MH Pulling out this knob setting it to ON supplies a rich mixture required to start the engine 305044 209015 EMC44010 RECOIL STARTER HANDLE If equipped Pull the handle gently u...

Page 35: ...el brack et 408015 EMU01297 TRIM ANGLE ADJUSTING ROD The position of the trim angle adjusting rod determines the minimum trim angle of the outboard motor in relation to the transom EMD00310 Adjustment w Do not overtighten the friction screw bolt If there is too much resistance it may be difficult to steer which could result in an accident Resistance Screw bolt Increased Turn clockwise Decreased Tu...

Page 36: ...s the motor up Pressing the switch DN tilts the motor down and trims the motor down When the switch button is released the motor will stop in its current position w Use the power trim tilt switch located on the bottom engine cowling only when the boat is at a complete stop with the engine off Attempting to use the cowl ing mounted power trim tilt switch while the boat is moving could increase the ...

Page 37: ...s a condition which is cause for warning the indicator on the front of the bottom cowling lights up The three indicators mounted on the bot tom cowling also indicate level of the engine oil Refer to the section WARN ING SYSTEM for details of this function 1 Warning indicator ...

Page 38: ...icator 1 Tachometer 2 Trim meter 3 Hour meter 4 Oil level indicator 5 Overheat warning indicator 6 Set button 7 Mode button NOTE All segments of the display will light momentarily after the main switch is turned on and will return to normal there after q t w u y e r 001078 001082 001049 EMU00136 Tachometer This meter shows the engine speed ...

Page 39: ... EMU01620 Hour Meter This meter shows the number of hours the engine has been run It can be set to show the total number of hours or the number of hours for the current trip The display can also be turned on and off 8 Changing the display format Pressing the MODE button changes the display format in the following circular pattern Total hours Trip hours Display off 8 Resetting the trip hours Simult...

Page 40: ...e has activated If neces sary refer to the TROUBLESHOOTING section in this manual Consult your deal er if the problem cannot be located and corrected EMU00138 Oil Level Indicator This indicator shows the engine oil level If the oil level falls below the lower limit the warning indicator will start to blink Refer to the sections FILLING OIL and OIL LEVEL WARNING for details 1 Oil level indicator cC...

Page 41: ...ced to be sure steering is correct Be sure you have tightened the bolt after adjusting the trim tab 1 Trim tab 2 Bolt 3 Cap If equipped cC The trim tab also serves as an anode to protect the engine from electroche mical corrosion Never paint the trim tab as it will become ineffective as an anode Boat tends to The rear end of trim tab veer To the left Turn the left port side port side A in the figu...

Page 42: ...TE The tilt lock mechanism on the hydro tilt model can be used to keep the outboard motor at a slightly tilted angle for shallow water cruising Refer to CRUISING IN SHALLOW WATER for the correct opera tion EMD44010 TILT LOCK MECHANISM for Manual tilt model The tilt lock mechanism is used to pre vent reverse thrust from the propeller lift ing the outboard motor when reversing To lock it set the til...

Page 43: ...ilt Hydro tilt model To keep the outboard motor in the tilted up position lock the tilt support lever to the clamp bracket 403011 EMD62011 TOP COWLING LOCK LEVER To remove the engine top cowling turn 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 upward 1 Top cowling lock lever...

Page 44: ...logging 1 Digital tachometer 2 40MH EMD80010 WARNING SYSTEM cC 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 Warning device activation The engine speed will automatically decrease to about 2 000 r min The overheat warning indicator will come on The buzzer will sound Tiller Remote control control ...

Page 45: ...se NOTE The warning for oil filter clogging is simi lar to the warnings for low oil level and overheating For easy troubleshooting it is advisable to check for engine overheating first then oil level and finally oil filter clogging 303012 303022 213024 q Warning device activation The engine speed will automatically decrease to about 2 000 r min The oil level warning indicator will come on The buzz...

Page 46: ...E MEMO ...

Page 47: ...N CHECKS 3 9 Operation after a long period of storage 3 10 BREAKING IN RUNNING IN ENGINE 3 11 STARTING ENGINE 3 13 WARMING UP ENGINE 3 18 SHIFTING 3 19 Forward 3 19 Reverse 3 20 STOPPING ENGINE 3 21 TRIMMING OUTBOARD MOTOR 3 23 Adjusting trim angle 3 24 TILTING UP DOWN 3 27 CRUISING IN SHALLOW WATER 3 32 3 34 CRUISING IN OTHER CONDITIONS 3 35 Cruising in salt water 3 35 Cruising in turbid water 3 ...

Page 48: ...rne 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 NOTE During water testing check the buoyancy of the boat at rest with its maximum load Check that the static water level on the exhaust housing is low enough to pre vent water entry into the powerhead when water rises due to waves when the outbo...

Page 49: ...the specific boat motor combination 8 Your dealer or other person experi enced in proper rigging should mount the motor If you are mounting the motor yourself you should be trained by an experienced person permanent mounted type 8 Your dealer or other person experi enced in proper outboard motor mounting should show you how to mount your motor portable type Mount the outboard motor on the center l...

Page 50: ... If the mounting height is too high cavitation tends to occur thus reducing the propulsion and if the pro peller tips cut the air the engine speed will rise abnormally and cause the engine to overheat If the mounting height is too low the water resistance will increase and thereby reduce engine efficiency Mount the engine so that the anti cavita tion plate is in alignment with the bottom of the bo...

Page 51: ...onally check the screws for tight ness during operation 2 An engine restraint cable or chain should be used Attach one end to the engine restraint cable attachment point and the other to a secure mounting point on the boat Other wise the engine could be completely lost if it accidentally falls off the tran som Secure the clamp bracket to the tran som with the bolts provided with the outboard For d...

Page 52: ...ion of lead from most fuels As gasoline has changed the amount of additives such as aromatics and oxy genates has increased These additives are important for the engines in passen ger cars but they can have detrimental effects in marine engines because of increased deposits in the combustion chamber When enough deposits collect piston rings begin sticking Performance drops and engine wear increase...

Page 53: ... premixing is needed except during break in running ins Simply pour gaso line into the fuel tank and oil into the oil tank Convenient indicator segments indicate condition of the oil supply Refer to oil warning system To fill the engine oil into the engine oil tank proceed as follows w Do not add gasoline Petrol into the oil tank Fire or explosion could result Engine oil tank capacity Refer to SPE...

Page 54: ...ling 2 Open the oil tank filler cap by pulling the tab 3 Slowly fill the engine oil into the engine oil tank 4 After filling replace the cap securely 5 Replace the top cowling securely 1 Engine oil tank 2 Oil tank filler cap 2 Open the oil tank filler cap by pulling a tab on the cap 3 Slowly fill the engine oil into the engine oil tank 4 After filling replace the all caps securely 1 Oil filler acc...

Page 55: ... 2 000 r min to help conserve oil Check oil filter for clogging Add oil 200 cm3 or less 0 21 US qt 0 181 Imp qt Oil level warning indicator Digital tachometer Remarks Oil level warning indicator lamp Analog tachome ter Bottom cowling Engine oil tank No refilling necessary Green Add oil refer to oil filling Yellow Buzzer sounds in remote control box and engine speed is limited to about 2 000 r min ...

Page 56: ...ions to be sure they are tight 8 Be sure the fuel tank is positioned on a secure flat surface and that the fuel hose is not twisted or flattened or likely to contact sharp objects EMF43010 Controls 8 Check throttle shift and steering for proper operation before starting the engine 8 The controls should work smoothly without binding or unusual free play 8 Look for loose or damaged connec tions 8 Ch...

Page 57: ...il mixture to start the engine 2 Start the engine Leave it idling w 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 3 Watch for oil flowing through the oil feed pipes After any air in the oil lines has been expelled YAMAHA PRECISION BLEND SYSTEM should supply oil normally I...

Page 58: ...ng in will help ensure proper performance and longer engine life cC 8 Failure to follow the break in running in procedure may result in reduced engine life or even severe engine dam age 8 Premix fuel must be used during break in running in in addition to oil in the Precision Blend System Break in running in time 10 hours Break in running in premix ratio Gasoline petrol Engine oil 50 1 ...

Page 59: ...Accelerate at full throttle onto plane then reduce engine speed to three quarter throttle approximately 4 000 r min Vary engine speed occasional ly Run at full throttle for one minute then allow about 10 minutes of opera tion at three quarter throttle or less to let the engine cool 4 Third through tenth hours Avoid operating at full throttle for more than 5 minutes at a time Let the engine cool be...

Page 60: ...its exhaust gases which contain carbon monoxide a col orless odorless gas which may cause brain damage or death when inhaled Symptoms include nausea dizziness and drowsiness Keep cockpit and cabin areas well ventilated Avoid blocking exhaust outlets 1 If there is an air vent screw on the fuel tank cap loosen it 2 or 3 turns 2 If there is a fuel joint on the motor firmly connect the fuel line to th...

Page 61: ...tall the lock plate on the other end of the lanyard in the engine stop switch w 8 Attach the engine stop switch lanyard to a secure place on your clothing your arm or leg while operating 8 Do not attach the lanyard to clothing that could tear loose Do not route the lanyard where it could become entan gled preventing it from functioning 8 Avoid accidentally pulling the lanyard during normal operati...

Page 62: ...ngine fails to start on the first pull repeat the above procedure If the engine still will not start after several attempts refer to the section on troubleshooting 9 After the engine starts do not let go of the starter handle Return it slowly to its home position before releasing it 10 After using the choke set the choke knob to the home position NOTE If the choke knob is left pulled out the engin...

Page 63: ...lock plate on the other end of the lanyard in the engine stop switch w 8 Attach the engine stop switch lanyard to a secure place on your clothing your arm or leg while operating 8 Do not attach the lanyard to clothing that could tear loose Do not route the lanyard where it could become entan gled preventing from functioning 8 Avoid accidentally pulling the lanyard during normal operation Loss of e...

Page 64: ...witch to START when the engine is running 8 Do not keep the starter motor turning for more than 5 seconds with the main switch in the START position If the engine does not start within 5 seconds return the main switch to ON wait 10 seconds and then crank the engine again If the starter motor is run con tinuously for more than 5 seconds the battery will rapidly become exhausted and it will be impos...

Page 65: ...ough the cooling pas sages If water is not flowing out of the pilot hole at all times while the engine is running do not continue to run the engine Overheating and serious damage could occur Stop the engine and check to see if the water inlet on the lower cas ing is blocked If the problem cannot be found and corrected consult your Yama ha dealer NOTE After the engine starts warm up opera tion is a...

Page 66: ...e first so that the engine idles or runs at low speeds EMG22310 FORWARD Tiller control model 1 Place the throttle control grip in the fully closed position N F 501026 701043 N F 501012 2 Turn the gear shift lever quickly and firmly from Neutral to Forward Remote control model Pull up the neutral interlock trigger if equipped and move the remote control lever quickly and firmly from Neutral to Forw...

Page 67: ...erwise the boat may become unstable 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 2 Check that the tilt lock lever for Man ual tilt Hydro tilt model is in the locked position 402011 Remote control model 3 Pull up the neutral interlock trigger if equipped and move the remote con trol lever quickly and fi...

Page 68: ...h equipped model 1 Push and hold the engine stop switch If button switch equipped on the switch until the engine comes to a complete stop NOTE The engine can also be stopped by pulling the lanyard from the engine stop switch 501045 902052 304036 2 After stopping the engine disconnect the fuel line from the motor 3 Tighten the air vent screw on the fuel tank cap after stopping the engine if it is e...

Page 69: ...rom the engine stop switch then turning the main switch to OFF ON START OFF 701023 304036 902052 2 If the fuel joints are provided discon nect the fuel line from the motor after stopping the engine 3 Tighten the air vent screw on the fuel tank cap after stopping the engine if it is equipped 4 Remove the key if the boat will be left unattended ...

Page 70: ...at engine and propeller Correct trim is also affected by variables such as the load in the boat sea conditions and running speed w Excessive trim for the operating condi tions either trim up or trim down can cause boat instability and can make steering the boat more difficult This increases the possibility of an accident If the boat begins to feel unstable or is hard to steer slow down and or read...

Page 71: ...od toward the transom Make test runs with the trim set to differ ent angles to find the position that works best for your boat and operating condi tions w 8 Stop the engine before adjusting the trim angle 8 Use care to avoid being pinched when removing or installing the rod 8 Use caution when trying a trim position for the first time Increase speed gradu ally and watch for any signs of instabili t...

Page 72: ...ower trim tilt switch located on the bottom engine cowling if equipped only when the boat is at a complete stop with the engine off The outboard motor trim angle can be adjusted operating the power trim tilt switch 1 To raise the bow trim out push the switch UP To lower the bow trim in push the switch DN Make test runs with the trim set to differ ent angles to find the position that works best for...

Page 73: ... there is more air drag Excessive trim up can cause the propeller to ventilate which reduces performance further When trimmed out too much a boat may porpoise hop in the water which could throw the operator and pas sengers overboard 105011 q 105013 w 105015 e EMG62110 Bow down When the bow of the boat is down it is easier to accelerate from a standing start onto plane Too much trim in causes the b...

Page 74: ...mage from over heating can result 8 Do not tilt up the engine by pushing the steering handle as this could break the handle 8 Keep the power unit higher than the propeller at all times Otherwise water can run into the cylinder causing dam age w 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 en...

Page 75: ...ne connection from the motor If the fuel connector is provided on the motor 304036 402035 403024 2 Place the tilt lock lever in Release 3 Hold the rear of the top cowling with one hand tilt the engine up and turn the tilt support lever to the locked position and support the engine ...

Page 76: ...l 1 Remove the fuel line connection from the motor 304036 402011 403011 2 Place the tilt lock lever in the release position 3 Hold the rear of the top cowling with one hand tilt the engine up and turn the tilt support lever toward you and support the engine ...

Page 77: ...403011 2 Push the power trim and tilt switch UP until the outboard has tilted up completely 3 Turn the tilt support lever toward engine bracket and support the engine w After tilting the engine be sure to sup port it with the tilt support lever Other wise the engine could fall back down suddenly if oil in the power trim and tilt unit should lose pressure ...

Page 78: ...ower trim and tilt model 1 Push the power trim and tilt switch UP until the engine is supported by the tilt rod 2 Release the tilt support lever 3 Push the power trim and tilt switch DN Down to lower the engine to the desired position EMG64011 PROCEDURE FOR TILTING DOWN Hydro tilt model 1 Release the tilt support lever holding the rear of the top cowling with one hand 2 Tilt the engine down ...

Page 79: ... lock mecha nism does not work while the shallow water cruising system is being used Hitting an underwater obstacle could cause the engine to lift out of the water resulting in loss of control 8 Use extra care when operating in reverse Too much reverse thrust can cause the engine to lift out of the water increasing the chance of acci dent and personal injury 8 Return the engine to its normal posi ...

Page 80: ...elease position 3 For setting the outboard motor at the partially tilted position slightly tilt up the engine until the plate turns com pletely 4 To return the engine to the normal position put the engine in Neutral then slightly tilt up the engine Set the tilt lock lever and shallow water lever to the lock position and slowly tilt the engine down ...

Page 81: ... the cooling water inlet of the lower unit is higher than the water surface when setting for and cruising in shallow water Otherwise severe damage from overheat ing can result EMG71710 PROCEDURE 1 Place the gear in the neutral position 2 Pull the tilt lock lever up to the Tilt position 3 Slightly tilt up the engine to the desired position and push the tilt lock lever down to the Lock position 4 To...

Page 82: ...resh water to prevent them from becoming clogged up with salt deposits NOTE Refer to cooling system flushing instruc tions in TRANSPORTING AND STORING OUTBOARD MOTOR CRUISING IN TURBID WATER It is strongly recommended that the optional chromium plated water pump kit be installed if the outboard is to be used in turbid muddy water conditions ...

Page 83: ... plug 4 13 Checking fuel system 4 15 Cleaning fuel filter 4 16 Adjusting idling speed 4 17 Checking water drain under engine oil tank 4 18 Replacing fuse 4 19 Checking wiring and connectors 4 19 Exhaust leakage 4 19 Water leakage 4 19 Checking power trim and tilt system 4 20 Checking propeller 4 21 Changing gear oil 4 23 Cleaning fuel tank 4 24 Inspecting and replacing anode 4 25 Checking battery ...

Page 84: ... V Amp W 8Starting carburetion system 2 stroke L 3 698 42 6 67 0 66 0 2 6 2 6 C D I system B7HS 10 0 9 1 0 0 035 0 039 Tiller control Manual start 12 80 Choke valve start system DRIVE UNIT 8Gear positions Gear ratio 8Trim and tilt system 8Propeller mark Forward Neutral Reverse 1 85 24 13 Manual tilt G FUEL AND OIL TIGHTNING TORQUE 8Fuel Fuel tank capacity L US gal Imp gal 8Recommended engine oil O...

Page 85: ...OUTBOARD OIL or an equivalent TC W3 certified outboard oil Engine 1 5 1 6 1 3 Remote YAMAHA PRECISION BLEND SYSTEM Hypoid gear oil SAE 90 430 14 5 15 1 Regular unleaded gasoline P O N minimum 86 YAMALUBE 2 STROKE OUTBOARD OIL or an equivalent TC W3 certified outboard oil Engine 1 5 1 6 1 3 Remote YAMAHA PRECISION BLEND SYSTEM Hypoid gear oil SAE 90 430 14 5 15 1 25 2 5 18 35 3 5 25 40TRA 50TRA 4 5...

Page 86: ...Do not use the tilt support lever knob when trailering the boat The outboard motor could shake loose from the tilt support and fall If the motor can not be trailered in the down position use an additional support device to secure it in the up position w 8 Never get under the lower unit while it is tilted even if a motor support bar is used Severe injury could occur if the outboard accidentally fal...

Page 87: ...n It is advisable to have your outboard ser viced by an authorized Yamaha dealer prior to storage However the following procedures can be performed by you the owner with a minimum of tools EMK21010 Filling Fuel Tank Fill the fuel tank with fresh fuel and add one ounce of Yamaha Fuel Conditioner and Stabilizer Part No LUB FUELC 12 00 to each gallon of fuel NOTE The use of Yamaha Fuel Conditioner an...

Page 88: ...ine top cowling and silencer cover 2 Install the outboard motor on the water tank and fill the tank with fresh water to above the level of the anti cavitation plate 1 Water surface 2 Lowest water level cC If the fresh water level is below the level of the anti cavitation plate or if the water supply is insufficient engine seizure may occur w 8 Do not tough or remove electrical parts when starting ...

Page 89: ...oard at high speed while on the flushing attachment or overheating could occur w 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 3 Run the engine at a fast idle for 10 15 minutes 4 Just prior to turning off the engine quickly spray Yamaha Stor Rite Engine Fogging Oil Part N...

Page 90: ...eces sary to manually override the control unit to completely fill the engine main tank Refer to Oil level warning sec tion 4 Change the lower unit oil Refer to CHANGING GEAR OIL Inspect the oil for the presence of water which indicates a leaky seal Seal replace ment should be performed by an authorized Yamaha dealership prior to use 5 Grease all grease fittings Refer to GREASING EMK27011 Cleaning...

Page 91: ...g in a closed space Always wear eye protection when working near batteries KEEP OUT OF REACH OF CHILDREN NOTE Batteries vary among manufacturers Therefore the following procedures may not always apply Consult your battery manufacturer s instructions 1 Disconnect and remove the battery from the boat Always disconnect the black negative lead first to prevent the risk of shorting 2 Clean the battery ...

Page 92: ...aha dealer for owners who have the mechanical skills tools and other equipment necessary to perform maintenance not covered by this owner s manual EMK33011 REPLACEMENT PARTS If replacement parts are necessary use only genuine Yamaha parts or equiva lents of the same type and of equivalent strength and materials Any part of inferi or quality may malfunction and the resulting loss of control could e...

Page 93: ...tion 4 15 Fuel tank 2 Cleaning 4 24 Throttle link Inspection Adjustment 1 Idling speed Inspection Adjustment 4 17 Spark plug Cleaning Adjustment 4 13 Replacement Oil tank water drain Cleaning 4 18 Oil pump Inspection Adjustment 1 Power trim and tilt system 1 Inspection 4 20 Wiring Connector Inspection Reconnect 4 19 Exhaust leakage Inspection 4 19 Water leakage Inspection 4 19 Grease points Greasi...

Page 94: ...4 11 E EMU00366 GREASING Yamaha marine grease Water resistant grease ...

Page 95: ...4 12 E EMU00366 GREASING Yamaha marine grease Water resistant grease ...

Page 96: ...air leak or carburetion problem in that cylinder Do not attempt to diagnose any problems yourself 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 If electrode erosion becomes excessive or if carbon and other deposits are excessive you should replace the sp...

Page 97: ...when you are fitting a spark plug a good esti mate of the correct torque is 1 4 to 1 2 a turn past finger tight Have the spark plug adjusted to the correct torque as soon as possible with a torque wrench 1 Spark plug gap 2 Spark plug I D mark NGK 903022 q w Spark plug torque Refer to SPECIFICATIONS page 4 1 Initial of spark plug Plug wrench size I D mark B 21 mm 13 16 in C BK 16 mm 5 8 in D 18 3 m...

Page 98: ...und it should be repaired immediately by Yama ha dealer or other qualified mechanic Checking points 8 Fuel system parts leakage 8 Fuel hose joint leakage 8 Fuel hose cracks or other damage 8 Fuel connector leakage w Leaking fuel can result in fire or explo sion 8 Check for fuel leakage regularly 8 If any fuel leakage is found the fuel system must be repaired by a qualified mechanic Improper repair...

Page 99: ...e up any spilled fuel immediately 8 The fuel filter must be reassembled carefully with O ring filter cup and hoses in place Improper assembly can result in a fuel leak which could result in a fire or explosion hazard To clean the fuel filter 1 Remove the nut holding the fuel filter assembly if equipped 2 Unscrew the filter cup catching any spilled fuel in a rag 3 Remove the filter element and wash...

Page 100: ...when starting or during operation 8 Keep hands hair and clothes away from flywheel and other rotating parts while engine is running cC This procedure must be performed while the outboard motor is in the water A flushing attachment or test tank can be used Procedure NOTE A diagnostic tachometer should be used for this procedure 1 Start the engine and allow it to warm up fully in Neutral until it is...

Page 101: ...not warmed up fully the speed setting will tend to be too high If you have diffi culty obtaining the specified idle consult a Yamaha dealer or other qualified mechanic 1 Throttle stop screw 213011 q w 213012 q w 204014 q EMK58010 CHECKING WATER DRAIN UNDER ENGINE OIL TANK A translucent water drain hose is connect ed from the bottom of the oil tank to the filler neck If water or foreign matter col ...

Page 102: ...azard NOTE If the new fuse blows again immediately consult a Yamaha dealer 1 Fuse holder 2 Fuse 20A 205015 q w EMK78010 CHECKING WIRING AND CONNECTORS 1 Check that each grounding wire is properly secured 2 Check that each connector is engaged securely EXHAUST LEAKAGE Start the engine and check that no exhaust leaks from the joints between the exhaust cover cylinder head and crank case WATER LEAKAG...

Page 103: ...ign of oil leaks 2 Operate each of the power trim and tilt switches on remote control and engine bottom cowling If equipped to check that all switches work 3 Tilt up the motor and check that the trim and tilt rod 1 is pushed out com pletely 4 Check that the trim and tilt rod is free of corrosion or other flaws 5 Operate the motor to trim and tilt down Check that the trim and tilt rod operates smoo...

Page 104: ...cut off switch if your boat has one 8 Do not use your hand to hold the pro peller when loosening or tightening the propeller nut Put a wood block between the cavitation plate and the propeller to prevent the propeller from turning 1 Check each of the propeller blades for wear erosion from cavitation or ven tilation or other damage 2 Check the splines for wear and dam age 3 Check for fish line wind...

Page 105: ... 3 Tighten the propeller nut to the speci fied torque 4 Align the propeller nut with the pro peller shaft hole Insert a new cotter pin in the hole and bend the cotter pin ends NOTE When the propeller nut does not align with the propeller shaft hole after tighten ing to the specified torque then tighten it more to align the hole cC Be sure to use a new cotter pin and bend the ends over securely Oth...

Page 106: ...that the oil drain plug is at the lowest point possi ble 2 Place a suitable container under the gear case 3 Remove the oil drain plug 1 NOTE The oil drain plug is magnetic Remove all metal particles from the plug before rein stalling it 4 Remove the oil level plug 2 to allow the oil to drain completely cC Inspect the used oil after it has been drained If the oil is milky water is get ting into the...

Page 107: ...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 Keep away from sparks cigarettes flames or other sources of ignition when cleaning the fuel tank 8 Remove the fuel tank from the boat before cleaning it Work only outdoors in an area with good ventilation 8 Wipe up any spilled fuel immedi...

Page 108: ... the filter located on the end of the suction pipe in a suitable clean ing solvent Allow the filter to dry 3 Replace the gasket with a new one Reinstall the fuel hose joint assembly and tighten the screws firmly 902054 604012 405011 EML24010 INSPECTING AND REPLACING ANODE Yamaha outboard motor is protected from corrosion by a sacrificial anode s Check the anode periodically Remove the scales from ...

Page 109: ... with water for 15 minutes and get immediate medical attention Antidote INTERNAL 8 Drink large quantities of water or milk followed by milk of magnesia beaten egg or vegetable oil Get immediate medical attention Batteries also generate explosive hydrogen gas therefore you should always follow these preventive mea sures 8 Charge batteries in a well ventilated area 8 Keep batteries away from fire sp...

Page 110: ...and should not be used for topping up 2 Keep the battery always in a good state of charge Installing a voltmeter will help you monitor your battery If you will not use the boat for a month or more remove the battery from the boat and store it in a cool dark place Completely recharge the battery before using it 3 If the battery will be stored for longer than a month check the specific grav ity of t...

Page 111: ... cC 8 Make sure the main switch on applica ble models is OFF before working on the battery 8 Reversal of the battery leads will dam age the rectifier 8 Connect the RED lead first when installing the battery and disconnect the RED lead last when removing it Otherwise the electrical system can be damaged 8 The electrical contacts of the battery and cables must be clean and properly connected or the ...

Page 112: ...s Consult a Yamaha dealer for touch up paint 102024 102025 EML44010 COATING THE BOAT BOTTOM A clean hull improves boat performance The boat bottom should be kept as clean of marine growths as possible If neces sary the boat bottom can be coated with an anti fouling paint approved for your area to inhibit marine growth Do not use anti fouling paint which includes copper or graphite These paints can...

Page 113: ...hapter 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 10 ...

Page 114: ...oad and repair Replace fuse with one of correct amperage 4 Have serviced by a Yamaha dealer 5 Attach lanyard 6 Shift to neutral B Engine will not start Starter operates 1 Fuel tank empty 2 Fuel contaminated or stale 3 Fuel filter clogged 4 Starting procedure incorrect 5 Fuel pump malfunctions 6 Spark plug s fouled or incorrect type 7 Spark plug cap s fitted incorrectly 8 Poor connections or damage...

Page 115: ...ve adjustment incorrect 19 Battery lead disconnected 1 Inspect spark plug s Clean or replace with recommended type 2 Check for pinched or kinked fuel line or other obstructions in fuel system 3 Fill tank with clean fresh fuel 4 Clean or replace filter 5 Have serviced by a Yamaha dealer 6 Find and correct cause of warning 7 Inspect and adjust as specified 8 Check wires for wear or breaks Tighten al...

Page 116: ...ged 2 Propeller pitch or diameter incorrect 3 Trim angle incorrect 4 Motor mounted at incorrect height on transom 5 Warning system activated 6 Boat bottom fouled with marine growth 7 Spark plug s fouled or incorrect type 8 Weeds or other foreign matter tangled on gear housing 9 Fuel system obstructed 10 Fuel filter clogged 11 Fuel contaminated or stale 12 Spark plug gap incorrect 1 Have propeller ...

Page 117: ...amaha dealer 15 Check and replace oil with specified type 16 Have serviced by a Yamaha dealer 17 Open the air vent screw 18 Have serviced by a Yamaha dealer 19 Connect correctly 20 Inspect spark plug and replace it with recommended type E Engine power loss F Engine vibrates excessively 1 Propeller damaged 2 Propeller shaft damaged 3 Weeds or other foreign matter tangled on propeller 4 Motor mounti...

Page 118: ...he boat damage 3 However damage is found or not found go back to a nearest harbor slowly and carefully 4 Have a Yamaha dealer inspection of the outboard motor before operating it again 607011 EMG65110 POWER TRIM TILT WILL NOT OPERATE If the engine cannot be tilted up or down with the power trim and tilt because of a discharged battery or a failure with the power trim and tilt unit the engine can b...

Page 119: ...xpectedly start to move which could result in an accident 8 Be sure no one is standing behind you when pulling the starter rope It could whip behind you and injure someone 8 An unguarded rotating flywheel is very dangerous Keep loose clothing and other objects away when starting the engine Use the emergency starter rope only as instructed Do not touch the fly wheel or other moving parts when the e...

Page 120: ...sure the engine is in Neutral and that the lanyard is attached to the engine stop switch The main switch must be on if the main switch is equipped on the elec tric start model NOTE Prime start model If the engine will not start with this proce dure refer to ENGINE FAILS TO OPER ATE 4 To start the engine with emergency starter rope insert the knotted end of the rope into the notch in the flywheel r...

Page 121: ...4011 OPEN CLOSE 902025 N 701014 2 Open the emergency starter valve located behind the silencer cover on the front side 3 Squeeze the priming pump two or three times to feed fuel 4 Turn the neutral throttle lever on the remote control box upwards It is necessary to change the throttle opening slightly depending on the engine temperature cC The operation of the neutral throttle lever is possible onl...

Page 122: ...ossible for the starter motor to start the engine 7 Return the neutral throttle lever slow ly to its home position so that the engine does not stall 8 After the engine starts return the emergency starter valve if used to CLOSE w When starting or operating the engine do not touch the ignition coil high volt age wire spark plug cap or other electri cal parts carrying high voltage Keep loose clothing...

Page 123: ...1 Thoroughly wash away mud salt seaweed etc with fresh water 2 Remove the spark plugs and face the spark plug holes downward to allow any water mud or contaminants to drain 3 Drain the fuel from the carburetor 4 Feed fogging oil or engine oil through the carburetors and spark plug holes while cranking with the manual starter or emergency starter rope 5 Take the outboard motor to a Yamaha dealer as...

Page 124: ...E MEMO ...

Page 125: ...EMP00010 Chapter 6 INDEX INDEX 6 1 1 2 3 4 5 6 E ...

Page 126: ...4 29 Cold engine fails to start 5 8 Connecting the battery 4 28 Cruising in other conditions 3 35 Cruising in salt water 3 35 Cruising in shallow water 3 32 3 34 Cruising in turbid water 3 35 D Digital tachometer 2 15 Disconnecting the battery 4 28 E Emission control information 1 2 Engine fails to operate 5 8 Engine oil 1 11 Engine stop button 2 5 Engine stop lanyard switch 2 6 2 10 Exhaust leaka...

Page 127: ... Reverse 3 20 Ring free fuel additive 3 5 S Safety information 1 3 Shallow water lever 2 13 Shifting 3 19 Specification data 4 1 Start in gear protection 1 14 Starter will not operate 5 6 Starting engine 3 13 Steering friction adjusting screw 2 12 Stopping engine 3 21 Storing outboard motor 4 4 T Tachometer 2 15 Temporary action in emergency 5 5 Throttle control grip 2 4 Throttle friction adjustin...

Page 128: ...gistration records are checked 2 Read the Limited Warranty statement which follows these instructions This warranty applies to Yamaha outboard motors sold in the United States whether purchased sepa rately or when supplied as original equipment by a boat builder The terms also apply to original equipment packages sold in Canada with coverage provided by Yamaha Motor Canada see Warranty Guide for C...

Page 129: ...ilable 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 Yamaha Motor Corporation U S A P O Box 6555 Cypress CA 90630 Attention Customer Relations Department Telephone No 714 761 7439 Fax No 714 761 7559 Yamaha Motor Canada Ltd 480 Gordon Baker Road Toro...

Page 130: ...tor purchased and registered for use in the United States only excluding its territo ries For warranty provisions outside the United States contact the particular country s local Yamaha distributor WARRANTY REGISTRATION To be eligible for warranty coverage the outboard motor must first be registered with Yamaha Motor Cor poration U S A A warranty registration form is provided in the Owner s Manual...

Page 131: ...LSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE YAMAHA MOTOR CORPORATION U S A Post Office Box 6555 Cypress California 90630 WARRANTY QUESTIONS AND ANSWERS Q What costs are my responsibility during the warranty period A The customer s responsibility includes all costs of normal maintenance services non warranty repairs accident and collision dam ages Q What are some examples of abnormal strai...

Page 132: ...ation such as names addresses model engine serial number dates and receipts CHANGE OF ADDRESS 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 by the selling deal...

Page 133: ...ll receive service If you need more information about your warranty coverage or your Yamaha outside the U S A or Canada please contact an autho rized 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 purchase which is important evidence the repairing dealer ...

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Page 136: ...40A 50A Printed in Japan March 2001 0 5 1 63B 28199 19 40VMHO 40VETO 50HETO 50EJDO E Printed on recycled paper ...

Page 137: ...40A 50A Printed on recycled paper OWN ...

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