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Yamaha 40V Owner's Manual
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Yamaha 40V Owner's Manual

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40V
40Y
50H
OWNER'S MANUAL
63B-28199-79-E0

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Summary of Contents for Yamaha 40V

  • Page 1 OWNER’S MANUAL 63B-28199-79-E0...
  • Page 2 EMU25050 Read this owner’s manual carefully before operating your outboard motor.
  • Page 3 Therefore some items may not ap- tain maximum enjoyment from your new ply to every model. Yamaha. If you have any question about the EMU25120 operation or maintenance of your outboard motor, please consult a Yamaha dealer.

  • Page 4: Table Of Contents

    Table of contents General information ......1 Tilt support lever for power trim and tilt or hydro tilt model..... 16 Identification numbers record... 1 Tilt support lever for manual tilt Outboard motor serial number ..1 model ..........16 Key number........1 Top cowling lock lever(s) (turn EC label..........
  • Page 5 Table of contents Operating engine......30 Battery care ........52 Feeding fuel (portable tank) .... 30 Cleaning the outboard motor... 53 Starting engine ........ 31 Checking painted surface of Warming up engine ......34 motor..........53 Choke start models ......34 Periodic maintenance ....
  • Page 6 Table of contents Treatment of submerged motor..77 Procedure ........77...

  • Page 7: General Information

    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 sto- len. 1. Key number...

  • Page 8: Safety Information

    General information are potentially hazardous boating condi- tions. Gasoline is highly flammable, and its va- pors are flammable and explosive. Handle and store gasoline carefully. Make sure there are no gas fumes or leaking fuel be- fore starting the engine. This product emits exhaust gases which contain carbon monoxide, a colorless, ZMU01696...

  • Page 9: Important Labels

    General information When a swimmer is in the water near you starting device. shift into neutral and shut off the engine. The engine will not start unless the shift EMU25380 control is in neutral position. Important labels EMU25540 EMU25395 Fueling instructions Warning labels EWM00010 WARNING...

  • Page 10: Gasoline

    Yamaha outboard motors are fitted with pro- be overloaded, causing electric system pellers chosen to perform well over a range damage.

  • Page 11: Start-In-Gear Protection

    General information EMU25760 Start-in-gear protection Yamaha outboard motors affixed with the pictured label or 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 in neutral. Always select neutral before starting the en- gine.

  • Page 12: Basic Components

    Basic components EMU25795 Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. 40VMHO, 40YMHO, 50HMHO ZMU03344 1. Manual starter handle 15. Top cowling 2. Tiller handle 16. Fuel tank* 3.
  • Page 13 Basic components 40VEO ZMU03346 1. Oil tank filler cap 2. Warning indicator(s) 3. Tilt lock lever 4. Clamp screw 5. Trim rod 6. Battery cable 7. Propeller 8. Cooling water inlet 9. Trim tab (anode) 10. Anti-cavitation plate 11. Anode 12.

  • Page 14: Fuel Tank

    Basic components 40VETO, 40YETO, 50HEDO, 50HETO ZMU04548 fuel tank, its function is as follows. 1. Oil tank filler cap EWM00020 2. Warning indicator(s) WARNING 3. Battery cable 4. Anode(s) The fuel tank supplied with this engine is 5. Propeller its dedicated fuel reservoir and must not 6.

  • Page 15: Fuel Joint

    Basic components the tank can be filled with fuel. To remove the cap, turn it counterclockwise. EMU25860 Air vent screw This screw is on the fuel tank cap. To loosen the screw, turn it counterclockwise. EMU26180 Remote control The remote control lever actuates both the shifter and the throttle.

  • Page 16: Neutral Interlock Trigger

    Basic components 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. 1. Neutral “ ” 2. Forward “ ” 3. Reverse “ ” 4. Shift 5.

  • Page 17: Throttle Grip

    Basic components ZMU03351 ZMU04916 1. Throttle indicator 1. Forward “ ” 2. Neutral “ ” EMU25970 3. Reverse “ ” Throttle friction adjuster A friction device provides adjustable resis- EMU25941 tance to movement of the throttle grip or the Throttle grip remote control lever, and can be set accord- The throttle grip is on the tiller handle.

  • Page 18: Engine Stop Lanyard Switch

    Basic components NOTE: The engine cannot be started with the lock plate removed. ZMU03352 When constant speed is desired, tighten the adjuster to maintain the desired throttle set- ting. ZMU04712 EMU25990 Engine stop lanyard switch 1. Lanyard 2. Lock plate The lock plate must be attached to the en- gine stop switch for the engine to run.

  • Page 19: Choke Knob For Pull Type

    Basic components EMU26090 Main switch The main switch controls the ignition system; its operation is described below. “ ” (off) With the main switch in the “ ” (off) posi- tion, the electrical circuits are off, and the key can be removed. “...

  • Page 20: Steering Friction Adjuster

    Basic components difficult to steer, which could result in an EMU26141 Power trim and tilt switch on remote accident. control or tiller handle The power trim and tilt system adjusts the outboard motor angle in relation to the tran- som. Pressing the switch “ ”...

  • Page 21: Trim Tab With Anode

    Basic components while the boat is moving could increase protect the engine from electrochemical the risk of falling overboard and could corrosion. Never paint the trim tab as it distract the operator, increasing the risk will become ineffective as an anode. of collision with another boat or an obsta- cle.

  • Page 22: Tilt Support Lever For Power Trim And Tilt Or Hydro Tilt Model

    Basic components ZMU03099 ZMU03358 EMU26372 1. Tilt lock lever Top cowling lock lever(s) (turn type) To remove the engine top cowling, turn the To lock it, set the tilt lock lever in the “ ” lock lever(s) and lift off the cowling. When in- (lock) position.

  • Page 23: Warning Indicator For Three Indicators

    Basic components EMU26290 EMU26470 Warning indicator for three Tachometer indicators This gauge shows the engine speed and has the following functions. If the engine develops a condition which is cause for warning, the indicator on the front of the bottom cowling lights up. The three in- dicators mounted on the bottom cowling also indicate the engine oil level.

  • Page 24: Oil Level Indicators (Three Indicators 2)

    Basic components rious engine damage will occur. 7. Engine trouble warning indicator 8. Set button 9. Mode button NOTE: The water separator and engine trouble warning indicators only operate when the en- gine is equipped with the appropriate func- tions. EMU26540 Oil level indicators (three indicators ZMU01867...

  • Page 25: Trim Meter

    Basic components ther information on reading the indicator, see EMU26620 Trim meter (digital type) page 20. This meter shows the trim angle of your out- ECM00050 CAUTION: board motor. NOTE: Do not continue to run the engine if the Memorize the trim angles that work best overheat warning indicator is on.

  • Page 26: Warning System

    Warning system ECM00090 CAUTION: Do not continue to operate the engine if a warning device has activated. Consult your Yamaha dealer if the problem can- not be located and corrected. ZMU01757 EMU26813 The buzzer will sound (if equipped on the...

  • Page 27: Oil Level Warning And Oil Filter Clogging Warning

    Basic components ZMU03363 ZMU03026 EMU26843 Oil level warning and oil filter clogging warning Oil injection models This engine has an oil level warning system. If the oil level falls below the lower limit, the warning system will activate. Activation of warning device Engine speed will automatically decrease ZMU03942 to about 2000 r/min.
  • Page 28 Basic components ZMU03366 1. Oil filter...

  • Page 29: Operation

    Operation EMU26901 specific boat and motor combination. Installation EWM00830 ECM00110 WARNING CAUTION: Improper mounting of the outboard mo- Incorrect engine height or obstructions tor could result in hazardous conditions to smooth water flow (such as the design such as poor handling, loss of control, or or condition of the boat, or accessories fire hazards.

  • Page 30: Clamping The Outboard Motor

    Other- mine the optimum mounting height. Con- wise the engine could be completely lost sult your Yamaha dealer boat if it accidentally falls off the transom. manufacturer for further information on de- termining the proper mounting height.

  • Page 31: Breaking In Engine

    Operation board (if packed). For details, consult EMU27060 Gasoline and engine oil mixing chart your Yamaha dealer. (50:1) EWM00650 WARNING Avoid using bolts, nuts or washers other than those contained in the engine pack- aging. If used, they must be of at least the same quality of material and strength and must be tightened securely.

  • Page 32: Preoperation Checks

    Check fuel line connections to be sure they Keep hands, hair, and clothes away are tight (if equipped Yamaha fuel tank or from the flywheel and other rotating boat tank). parts while the engine is running.

  • Page 33: Filling Fuel And Engine Oil

    Do not add gasoline into the oil tank. Fire storage. Otherwise engine seizure could or explosion could result. occur. This engine uses the Yamaha oil injection EMU27233 Filling fuel and engine oil system, which provides superior lubrication by ensuring the proper oil ratio for all operat-...

  • Page 34: Filling Oil For Electric Start Models

    Do not add gasoline into the oil tank. Fire gine oil tank. or explosion could result. This engine uses the Yamaha oil injection system, which provides superior lubrication by ensuring the proper oil ratio for all operat- ing conditions. No fuel premixing is needed.

  • Page 35: Oil Level Indicator Operation

    Operation EMU27321 Oil level indicator operation The various functions of the oil level system are as follows: EMU27340 Manual start models Oil level warning indicator Engine oil tank Remarks more than 200 cm No refilling necessary. (0.21 US qt, 0.181 Imp qt) Buzzer sounds in remote control box and engine speed is...

  • Page 36: Operating Engine

    Operation Oil level Oil level warning warning indicator indicator (analog Engine oil tank Remarks (digital tachometer/ tachometer) bottom cowling) Buzzer sounds in remote control box and engine speed is 200 cm (0.21 US limited to about 2000 qt, 0.18 Imp qt) or r/min to help con- less serve oil.

  • Page 37: Starting Engine

    Operation ZMU03386 ZMU02024 If a steering friction adjuster is provided NOTE: on your outboard motor, securely attach The start-in-gear protection device prevents the fuel line to the fuel line clamp. the engine from starting except when in neu- NOTE: tral. During engine operation place the tank hori- Attach the engine stop switch lanyard to zontally, otherwise fuel cannot be drawn...
  • Page 38 Operation the engine will run poorly or stall. Pull the manual starter handle slowly un- til you feel resistance. Then give a strong pull straight out to crank and start the engine. Repeat if necessary. ZMU03387 Place the throttle grip in the “ ”...
  • Page 39 Operation amount and try to start the engine again. If the engine still fails to start, see page 69. EMU27662 Electric start and remote control models Place the remote control lever in neutral. Turn the main switch to “ ” (on). Turn the main switch to “...

  • Page 40: Warming Up Engine

    Consult your Yamaha age could occur. Stop the engine and dealer if the problem cannot be located check whether the cooling water inlet on and corrected.

  • Page 41: Shifting

    Operation EMU27740 Shifting EWM00180 WARNING Before shifting, make sure there are no swimmers or obstacles in the water near you. ECM00220 CAUTION: ZMU03392 To change the boat direction or shifting position from forward to reverse or vice- Remote control models versa, first close the throttle so that the Pull up the neutral interlock trigger (if engine idles (or runs at low speeds).

  • Page 42: Reverse (Manual Tilt And Hydro Tilt Models)

    Operation Pull up the neutral interlock trigger (if equipped) and move the remote control lever quickly and firmly from neutral to reverse. ZMU03397 Move the gear shift lever quickly and firmly from neutral to reverse. EMU27795 Reverse (manual tilt and hydro tilt models) EWM00190 WARNING...

  • Page 43: Stopping Engine

    Operation the fuel line if there is a fuel joint on the outboard motor. EMU27820 ZMU03108 Stopping engine Before stopping the engine, first let it cool off Tighten the air vent screw on the fuel for a few minutes at idle or low speed. Stop- tank cap (if equipped).

  • Page 44: Adjusting Trim Angle For Manual Tilt Models

    Operation also affected by variables such as the load in Remove the trim rod from the clamp the boat, sea conditions, and running speed. bracket while slightly tilting the outboard EWM00740 motor up. WARNING 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.

  • Page 45: Adjusting Trim Angle

    Operation removing or installing the rod. Use caution when trying a trim position for the first time. Increase speed gradu- ally and watch for any signs of instabil- ity or control problems. Improper trim angle can cause loss of control. NOTE: The outboard motor trim angle can be changed approximately 4 degrees by shifting...

  • Page 46: Adjusting Boat Trim

    Operation trim angle. the boat is up about 3 to 5 degrees. With the Be sure all people are clear of the out- bow up, the boat may have a greater tenden- board motor when adjusting the tilt an- cy to steer to one side or the other. Compen- gle, also be careful not to pinch any sate for this as you steer.

  • Page 47: Tilting Up And Down

    Operation and making it hard to increase speed. Oper- the engine will be tilted for more than a ating with excessive trim-in at higher speeds few minutes. Otherwise fuel may leak. also makes the boat unstable. Resistance at ECM00241 the bow is greatly increased, heightening the CAUTION: danger of “bow steering”...

  • Page 48: Procedure For Tilting Up (Hydro Tilt Models)

    Operation ZMU03405 ZMU03108 Hold the rear of the top cowling with one Place the tilt lock lever in the release po- hand, tilt the engine up, and turn the tilt sition. support lever to the lock position and support the engine. ZMU03118 Hold the rear of the top cowling with one ZMU03114...
  • Page 49 Operation Place the remote control lever / the gear shift lever in neutral. ZMU04993 Push the tilt support knob into the clamp bracket or pull the tilt support lever to- Disconnect the fuel line from the out- ward you to support the engine. board motor or close the fuel cock.

  • Page 50: Procedure For Tilting Down

    Operation from marine growth and corrosion which could damage the power trim and tilt mechanism. EMU30410 Procedure for tilting down Manual tilt models Slightly tilt the engine up. On models equipped with a tilt support lever, return it to the release position. ZMU02569 Slowly tilt the outboard motor down.

  • Page 51: Cruising In Shallow Water

    Operation to allow operation in shallow water. EWM00270 WARNING Place the gear shift in neutral before us- ing the shallow water cruising system. Run the boat at the lowest possible speed when using the shallow water cruising system. Use extra care when operating in re- ZMU02569 verse.

  • Page 52: Power Trim And Tilt Models / Power Tilt Models

    Operation deeper water. ECM00260 CAUTION: Do not tilt the outboard motor up so that the cooling water inlet on the lower unit is above the surface of the water when set- ting up for and cruising in shallow water. Otherwise severe damage from overheat- ing can result.

  • Page 53: Cruising In Other Conditions

    NOTE: For cooling system flushing instructions, see page 50. Cruising in turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit if you use the outboard motor in turbid (mud- dy) water conditions.

  • Page 54: Maintenance

    Maintenance EMU28216 40VMHO 533 mm (21.0 in) Specifications 40YETO 533 mm (21.0 in) Dimension: 50HEDO 533 mm (21.0 in) Overall length: 50HETO 533 mm (21.0 in) 40VEO 670 mm (26.4 in) Weight (AL) S: 40VETO 646 mm (25.4 in) 40VEO 74.5 kg (164 lb) 40VMHO 1281 mm (50.4 in) 40VMHO 75.8 kg (167 lb) 40YETO 646 mm (25.4 in)
  • Page 55 Maintenance Displacement: 50HEDO Electric 698.0 cm (42.59 cu.in) 50HETO Electric Bore × stroke: 50HMHO Manual 67.0 × 66.0 mm (2.64 × 2.60 in) Starting carburetion system: Ignition system: 40VEO Prime start 40VETO Prime start Spark plug (NGK): 40VMHO Choke valve 40VEO B7HS-10 40YETO Prime start 40VETO B7HS-10...

  • Page 56: Transporting And Storing Outboard Motor

    Spark plug: sition using a motor support device such as 25.0 Nm (18.4 ft-lb) (2.55 kgf-m) a transom saver bar. Consult your Yamaha Propeller nut: dealer for further details. 35.0 Nm (25.8 ft-lb) (3.57 kgf-m)

  • Page 57: Clamp Screw Mounting Models

    Remove the propeller. Storing outboard motor Install the outboard motor on the test When storing your Yamaha outboard motor tank. Fill the tank with fresh water to for prolonged periods of time (2 months or above the level of the anti-cavitation longer), several important procedures must plate.

  • Page 58: Lubrication (Oil Injection Models)

    Run the engine at a fast idle for a few seal. Seal replacement should be per- minutes in neutral position. formed by an authorized Yamaha dealer Just prior to turning off the engine, quick- prior to use. ly spray “Fogging Oil” alternately into Grease all grease fittings.

  • Page 59: Cleaning The Outboard Motor

    Clean the battery casing and terminals. iar with machine servicing, this work Fill each cell to the upper level with dis- should be done by your Yamaha dealer or tilled water. other qualified mechanic. Store the battery on a level surface in a...
  • Page 60 Maintenance available from your Yamaha dealer.

  • Page 61: Maintenance Chart

    Refer to the sections in this chapter for explanations of each owner-specific action. The “ ” symbol indicates the check-ups which you may carry out yourself. The “ ” symbol indicates work to be carried out by your Yamaha dealer. Initial Every 50 hours Item...

  • Page 62: Greasing

    When operating in salt water, turbid or muddy water, the engine should be flushed with clean water after each use. EMU28940 Greasing Yamaha grease A (water resistant grease) Yamaha grease D (corrosion resistant grease; for propeller shaft) 40VMHO, 40YMHO, 50HMHO ZMU03415...

  • Page 63: Cleaning And Adjusting Spark Plug

    A Instead, take the outboard motor to a damaged insulator could allow external Yamaha dealer. You should periodically re- sparks, which could lead to explosion or move and inspect the spark plug because fire.

  • Page 64: Checking Fuel System

    Improper repairs can make the outboard unsafe to operate. Check the fuel lines for leaks, crack, or mal- function. If a problem is found, your Yamaha dealer or other qualified mechanic should re- pair it immediately. 1. Spark plug gap 2.

  • Page 65: Inspecting Fuel Filter

    If any water is found in the If you have any question about properly fuel, the Yamaha portable fuel tank or doing this procedure, consult your other fuel tanks should be checked and Yamaha dealer.

  • Page 66: Inspecting Idling Speed

    EMU29040 Inspecting idling speed ifying the idle speed, or the idle speed re- EWM00450 quires adjustment, consult a Yamaha dealer WARNING or other qualified mechanic. Do not touch or remove electrical parts Verify whether the idle speed is set to when starting or during operation.

  • Page 67: Checking Wiring And Connectors

    Maintenance ZMU03416 ZMU03240 EMU29120 1. Drain hose Exhaust leakage 2. Filler neck side Start the engine and check that no exhaust leaks from the joints between the exhaust cover, cylinder head, and body cylinder. EMU29130 Water leakage Start the engine and check that no water leaks from the joints between the exhaust cover, cylinder head, and body cylinder.

  • Page 68: Checking Propeller

    Check that the trim and tilt rod is free of corrosion or other flaws. Tilt the outboard motor down. Check that the trim and tilt rod operates smoothly. NOTE: Consult your Yamaha dealer if any operation is abnormal. EMU29171 ZMU01897 Checking propeller Checkpoints...

  • Page 69: Removing The Propeller

    NOTE: eration and be lost. If the shear pin equipped: it is designed to Apply Yamaha marine grease or a cor- break if the propeller hits a hard underwater rosion resistant grease to the propeller obstacle to help protect the propeller and shaft.

  • Page 70: Changing Gear Oil

    You could be severely injured if the outboard motor falls on you. NOTE: Never get under the lower unit while it For disposal of used oil consult your Yamaha is tilted, even when the tilt support lever dealer. or knob is locked. Severe injury could...

  • Page 71: Cleaning Fuel Tank

    Inspecting and replacing anode(s) leak, which could result in a fire or ex- Yamaha outboard motors are protected from plosion hazard. corrosion by sacrificial anodes. Inspect the Dispose of old gasoline according to lo- external anodes periodically.

  • Page 72: Checking Battery (For Electric Start Models)

    Maintenance fluid as it can cause severe burns or permanent eye injury. Wear protective eye gear when han- dling or working near batteries. Antidote (EXTERNAL): SKIN - Flush with water. EYES - Flush with water for 15 minutes and get immediate medical attention. Antidote (INTERNAL): ZMU03134 Drink large quantities of water or milk...

  • Page 73: Connecting The Battery

    NOTE: Consult a Yamaha dealer when charging or 1. Red cable re-charging batteries. 2. Black cable 3.

  • Page 74: Coating The Boat Bottom

    Maintenance ZMU04678 EMU29400 Coating the boat bottom A clean hull improves boat performance. The boat bottom should be kept as clean of ma- rine growth as possible. If necessary, the boat bottom can be coated with an anti-foul- ing paint approved for your area to inhibit marine growth.

  • Page 75: Trouble Recovery

    Q. Has fuel pump malfunctioned? If your outboard motor requires repair, bring A. Have serviced by a Yamaha dealer. it to your Yamaha dealer. If the engine trouble warning indicator is Q. Are spark plug(s) fouled or of incorrect flashing, consult your Yamaha dealer.
  • Page 76 Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel. Q. Is carburetor clogged? A. Have serviced by a Yamaha dealer. Q. Is fuel filter clogged? A. Clean or replace filter. Q. Is fuel joint connection incorrect? A.
  • Page 77 Trouble Recovery A. Have serviced by a Yamaha dealer. Q. Are weeds or other foreign matter tangled on gear housing? Q. Is load on boat improperly distributed? A. Remove foreign matter and clean lower A. Distribute load to place boat on an even unit.

  • Page 78: Temporary Action In Emergency

    Q. Is steering pivot loose or damaged? EWM00630 A. Tighten or have serviced by a Yamaha WARNING dealer. Be sure to use the specified fuse. An in-...

  • Page 79: Power Trim And Tilt Will Not Operate

    Make sure the remote control lever is in neutral. Otherwise the boat could NOTE: unexpectedly start to move, which Consult your Yamaha dealer if the new fuse could result in an accident. immediately blows again. Attach the engine stop switch lanyard...

  • Page 80: Emergency Starting Engine

    Trouble Recovery starter mechanism or top cowling after the engine is running. Do not touch the ignition coil, spark plug wire, spark plug cap, or other elec- trical components when starting or op- erating the motor. You could get an electrical shock.

  • Page 81: Emergency Starting Engine

    Trouble Recovery Prepare the engine for starting. For fur- ther information, see page 31. Be sure the engine is in neutral and that the en- gine stop switch lanyard lock plate is at- tached to the engine stop switch. The main switch must be “...

  • Page 82: Engine Fails To Operate

    Trouble Recovery OPEN CLOSE ZMU03429 ZMU03141 Squeeze the primer pump two or three EMU29670 Engine fails to operate times to feed fuel. EMU29704 Cold engine fails to start If the engine fails to start when it is cold, use the following procedure. EWM00410 WARNING When starting or operating the engine, do...
  • Page 83 Do not keep the starter motor turning If the outboard motor is submerged, immedi- for more than 5 seconds. If the starter ately take it to a Yamaha dealer. Otherwise motor is turned continuously for more some corrosion may begin almost immedi- than 5 seconds, the battery will be ately.
  • Page 84 Feed fogging oil or engine oil through the carburetor(s) and spark plug holes while cranking with the manual starter or emergency starter rope. ZMU01911 Take the outboard motor to a Yamaha dealer as soon as possible. ECM00400 CAUTION: Do not attempt to run the outboard motor...
  • Page 86 YAMAHA MOTOR CO., LTD. Printed in Japan April 2004 –0.2 × 1 ! Printed on recycled paper...

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