Yamaha 50 Owner's Manual
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Yamaha 50 Owner's Manual

Yamaha 50 Owner's Manual

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50
OWNER'S MANUAL
U.S.A.Edition
LIT-18626-06-94
63B-28199-1F

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  • Page 1 OWNER’S MANUAL U.S.A.Edition LIT-18626-06-94 63B-28199-1F...
  • Page 2 EMU25060 ZMU01690 Read this owner’s manual carefully before operating your outboard motor.

  • Page 3: Important Manual Information

    EMU25110 tain maximum enjoyment from your new Yamaha. If you have any question about the operation or maintenance of your outboard motor, please consult a Yamaha dealer. In this Owner’s Manual particularly important OWNER’S MANUAL...

  • Page 4: Table Of Contents

    Breaking in engine ......25 Fuel joint ......... 11 Gasoline and engine oil mixing Fuel gauge ........11 chart (50:1)........25 Fuel tank cap ........11 Procedure for oil injection models ... 25 Air vent screw ......... 11 Preoperation checks ..... 26 Remote control........
  • Page 5 Greasing ......... 49 IMPORTANT WARRANTY Cleaning and adjusting spark INFORMATION IF YOU USE plug ..........49 YOUR YAMAHA OUTSIDE THE Checking fuel system ...... 50 USA OR CANADA ...... 74 Inspecting fuel filter ......51 Cleaning fuel filter ......51...

  • Page 6: 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 7: Safety Information

    Consult your dealer for correct use. Never operate after drinking alcohol or tak- ing drugs. About 50% of all boating fatali- ZMU04129 ties involve intoxication. Have an approved personal flotation de- 1.

  • Page 8: Important Labels

    Never illegally discard (dump) the product. Attach the engine stop switch lanyard cord Yamaha recommends consulting the deal- to a secure place on your clothing, or your er on discarding the product. arm or leg while operating. If you acciden- Be informed about boating safety.

  • Page 9: Basic Boating Rules (Rules Of The Road)

    General information EMU25401 These rules determine which vessel has the Label right-of-way, and what each vessel should EWM01260 WARNING Stand-on vessel Be sure shift control is in neutral before The vessel with the right-of-way has the duty starting engine. (except 2HP) to continue its course and speed, except to Do not touch or remove electrical parts avoid an immediate collision.

  • Page 10: Other Special Situations

    General information sel head-on) Crossing When two power driven vessels are crossing Crossing: (you are traveling across the oth- each other’s path close enough to run the er vessel’s path) risk of collision, the vessel which has the oth- Overtaking: (you are passing or being er on the starboard (right) side must keep out passed by another vessel) of the way of the other.
  • Page 11 General information bend that may obstruct the view of other wa- er is going towards the port). This means that ter vessels, the operator should sound a pro- red buoys are passed on the starboard longed blast on the whistle (4 to 6 seconds). (right) side when proceeding from open wa- If another vessel is around the bend, it too ter into port, and black buoys are to port (left)

  • Page 12: Fueling Instructions

    General information ZMU01708 EMU25540 away from sparks, flames, or other Fueling instructions sources of ignition. EWM00010 Stop engine before refueling. WARNING Refuel in a well-ventilated area. Refuel GASOLINE AND ITS VAPORS ARE HIGH- portable fuel tanks off the boat. LY FLAMMABLE AND EXPLOSIVE! Take care not to spill gasoline.

  • Page 13: Gasoline

    The performance of your outboard motor will the fuel meets minimum octane ratings. be critically affected by your choice of propel- Yamaha does not recommended gasohol ler, as an incorrect choice could adversely containing methanol because it can cause affect performance and could also seriously fuel system damage or engine performance damage the motor.

  • Page 14: Start-In-Gear Protection

    53. on the engine. EMU25770 Start-in-gear protection Yamaha outboard motors are fitted with pro- Yamaha outboard motors or Yamaha-ap- pellers chosen to perform well over a range proved remote control units are equipped of applications, but there may be uses where with start-in-gear protection device(s).

  • Page 15: Basic Components

    Basic components EMU25799 Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. ZMU05014 1. Battery cable 15. Fuel tank* 2. Anode(s) EMU25802 3. Propeller* Fuel tank 4. Cooling water inlet If your model was equipped with a portable 5.

  • Page 16: Fuel Joint

    Basic components tions. ZMU03157 1. Power trim and tilt switch 2. Remote control lever 1. Fuel joint 3. Neutral interlock trigger 2. Fuel gauge 4. Neutral throttle lever 3. Fuel tank cap 5. Main switch / choke switch 4. Air vent screw 6.

  • Page 17: Neutral Interlock Trigger

    Basic components 6. Throttle 7. Fully open EMU26201 Neutral interlock trigger To shift out of neutral, first pull the neutral in- terlock trigger up. 1. Fully open 2. Fully closed EMU25911 Tiller handle To change direction, move the tiller handle to the left or right as necessary.

  • Page 18: Throttle Grip

    Basic components 1. Throttle indicator 1. Forward “ ” 2. Neutral “ ” EMU25971 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 19: Engine Stop Lanyard Switch

    Basic components NOTE: The engine cannot be started with the lock plate removed. When constant speed is desired, tighten the adjuster to maintain the desired throttle set- ting. 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 20: Main Switch

    Basic components EMU26090 EMU26141 Main switch Power trim and tilt switch on remote The main switch controls the ignition system; control or tiller handle its operation is described below. The power trim and tilt system adjusts the “ ” (off) outboard motor angle in relation to the tran- With the main switch in the “...

  • Page 21: Power Trim And Tilt Switch On Bottom Engine Cowling

    Basic components DOWN ZMU03096 EMU26151 NOTE: Power trim and tilt switch on bottom For instructions on using the power trim and engine cowling tilt switch, see page 37. The power trim and tilt switch is located on EMU26241 the side of the bottom engine cowling. Press- Trim tab with anode ing the switch “...

  • Page 22: Trim Rod (Tilt Pin)

    Basic components ZMU03097 ZMU03194 EMU26372 1. Trim tab Top cowling lock lever(s) (turn type) 2. Bolt To remove the engine top cowling, turn the lock lever(s) and lift off the cowling. When in- EMU26261 Trim rod (tilt pin) stalling the cowling, check to be sure it fits The position of the trim rod determines the properly in the rubber seal.

  • Page 23: Tachometer

    Basic components EMU26470 7. Engine trouble warning indicator Tachometer 8. Set button This gauge shows the engine speed and has 9. Mode button the following functions. NOTE: The water separator and engine trouble warning indicators only operate when the en- gine is equipped with the appropriate func- tions.

  • Page 24: Overheat Warning Indicator (Digital Type)

    Basic components rious engine damage will occur. ZMU04581 NOTE: ZMU01867 Memorize the trim angles that work best for 1. Oil level indicator your boat under different conditions. Adjust the trim angle to the desired setting with the EMU26581 Overheat warning indicator (digital power trim and tilt switch.

  • Page 25: 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. EMU26816 Overheat warning ZMU03025 This engine has an overheat warning device.

  • Page 26: Oil Level Warning And Oil Filter Clogging Warning

    Basic components ZMU03363 ZMU03026 EMU26846 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 27 Basic components and finally oil filter clogging. ZMU03366 1. Oil filter...

  • Page 28: 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 29: 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 30: Breaking In Engine

    Breaking in engine speed. A fast idle in neutral is best. Your new engine requires a period of break- Next 50 minutes: in to allow mating surfaces of moving parts to Do not exceed half throttle (approxi- wear in evenly. Correct break-in will help en- mately 3000 r/min).

  • Page 31: Preoperation Checks

    (12 months) of storage, proceed as fol- CAUTION: lows: Do not start the engine out of water. Over- Use a 50:1 gasoline-oil mixture to start heating and serious engine damage can the engine. occur. Start the engine. Leave it idling.

  • Page 32: Filling Fuel And Engine Oil

    Ring Free Fuel Additive, available from fuel tank): your Yamaha dealer. Ring Free Fuel Addi- 25 L (6.60 US gal) (5.50 Imp.gal) tive has repeatedly proven its ability to clean combustion deposits from inside the engine, notably the critical piston-ring-land area, and fuel system components.

  • Page 33: Filling Oil For Electric Start Models

    EWM00530 WARNING Do not add gasoline into the oil tank. Fire 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- ZMU03370 ing conditions. No fuel premixing is needed.

  • Page 34: Oil Level Indicator Operation

    Operation EMU27321 Oil level indicator operation The various functions of the oil level system are as follows: EMU27350 Electric start models Oil level Oil level warning warning indicator indicator (analog Engine oil tank Remarks (digital tachometer/ tachometer) bottom cowling) Green more than 450 No refilling necessary.

  • Page 35: Starting Engine

    Operation tank cap, loosen it 2 or 3 turns. zontally, otherwise fuel cannot be drawn from the fuel tank. Squeeze the primer pump with the outlet end up until you feel it become firm. ZMU02295 If there is a fuel joint on the motor, firmly connect the fuel line to the joint.
  • Page 36 Operation gine stop switch. Turn the main switch to “ ” (start), and hold it for a maximum of 5 seconds. EWM00120 WARNING Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg while operating. Do not attach the lanyard to clothing that could tear loose.
  • Page 37 Operation 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 “ ” (start), and hold it for a maximum of 5 seconds. NOTE: The start-in-gear protection device prevents the engine from starting except when in neu-...

  • Page 38: Warming Up Engine

    Place the throttle grip in the fully closed the lower case or the cooling water pilot position. hole is blocked. Consult your Yamaha dealer if the problem cannot be located and corrected. Move the gear shift lever quickly and...

  • Page 39: Reverse (Automatic Reverse Lock And Power Trim And Tilt Models)

    Operation firmly from neutral to forward. Move the gear shift lever quickly and firmly from neutral to reverse. Remote control models Pull up the neutral interlock trigger (if equipped) and move the remote control lever quickly and firmly from neutral to forward.

  • Page 40: Procedure

    Operation ping the engine immediately after operating at high speed is not recommended. EMU27844 Procedure Push and hold the engine stop button or turn the main switch to “ ” (off). ZMU02301 Remove the key if the boat will be left unattended.

  • Page 41: Adjusting Trim Angle

    Operation switch while the boat is moving. Adjust the outboard motor trim angle using the power trim and tilt switch. ZMU03110 1. Power trim and tilt switch ZMU03109 1. Trim operating angle EMU27882 Adjusting trim angle DOWN Power trim and tilt models EWM00751 ZMU03096 WARNING...

  • Page 42: Adjusting Boat Trim

    Operation “ ” (down). Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions. EMU27911 Adjusting boat trim When the boat is on plane, a bow-up attitude results in less drag, greater stability and effi- ciency.

  • Page 43: Procedure For Tilting Up (Power Trim And Tilt Models / Power Tilt Models)

    Operation salt corrosion. EWM00220 WARNING Be sure all people are clear of the out- board motor when tilting up and down, also be careful not to pinch any body parts between the drive unit and engine bracket. EWM00250 WARNING Disconnect the fuel line from the out- Leaking fuel is a fire hazard.

  • Page 44: Procedure For Tilting Down (Power Trim And Tilt Models / Power Tilt Models)

    Operation sure. Models equipped with trim rods: Once the outboard motor is supported with the tilt support lever, press the power trim and tilt switch / power tilt switch “ ” (down) to retract the trim rods. ECM00250 CAUTION: Be sure to retract the trim rods complete- ZMU04993 ly during mooring.

  • Page 45: Cruising In Shallow Water

    Operation to allow operation in shallow water. EWM00660 WARNING Place the gear shift in neutral before setting up for shallow water cruising. Return the outboard motor to its normal position as soon as the boat is back in deeper water. ECM00260 ZMU01936 CAUTION:...

  • Page 46: Cruising In Other Conditions

    For cooling system flushing instructions, see page 43. Cruising in turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (not available for some models) if you use the outboard motor in turbid or muddy water conditions.

  • Page 47: Maintenance

    Regular unleaded gasoline r/min) Min. pump octane: Idling speed (in neutral): 800 ±50 r/min Fuel tank capacity: Engine: 25 L (6.60 US gal) (5.50 Imp.gal) Type: Recommended engine oil: 2-stroke L YAMALUBE 2-stroke outboard motor Displacement: 698.0 cm (42.59 cu.in) Lubrication: Bore ×...

  • Page 48: 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 49: Procedure

    12-00) to each gallon of fuel. occur. NOTE: Cooling system flushing is essential to The use of “Yamaha Fuel Conditioner and prevent the cooling system from clog- Stabilizer” eliminates the need to drain the ging up with salt, sand, or dirt. In addi- fuel system.

  • Page 50: Lubrication (Oil Injection Models)

    Seal replacement should be per- follow these preventive measures: formed by an authorized Yamaha dealer Charge batteries in a well-ventilated ar- prior to use. Grease all grease fittings. For further de- Keep batteries away from fire, sparks, tails, see page 49.

  • Page 51: Cleaning The Outboard Motor

    Maintenance 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 Maintenance, replacement, or repair of cool, dry, well-ventilated place out of di- the emission control devices and sys- rect sunlight.

  • Page 52: Maintenance Chart

    When operating in salt water, turbid or muddy water, the engine should be flushed with clean water after each use. 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 53 Maintenance Initial Every 50 hours Item Actions 10 hours hours (6 hours (1 (1 month) months) months) year) Inspection / replace- Water pump ment Oil pump Inspection / adjustment Oil tank water drain Inspection / cleaning Cleaning / adjustment /...

  • Page 54: Greasing

    Maintenance EMU28931 Greasing Yamaha marine grease (Water resistant grease) ZMU03414 The spark plug is an important engine com- EMU28952 Cleaning and adjusting spark plug ponent and is easy to inspect. The condition EWM00560 of the spark plug can indicate something WARNING about the condition of the engine.

  • Page 55: 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 1. Spark plug gap dealer or other qualified mechanic should re- 2. Spark plug I.D. mark (NGK) pair it immediately.

  • Page 56: 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 57: Inspecting Idling Speed

    If you have difficulty ver- 1. Filter cup ifying the idle speed, or the idle speed re- 2. Filter element quires adjustment, consult a Yamaha dealer 3. Filter housing or other qualified mechanic. 4. O-ring Verify whether the idle speed is set to Reinstall the filter element in the cup.

  • Page 58: Exhaust Leakage

    EWM00430 NOTE: WARNING Consult your Yamaha dealer if any operation Never get under the lower unit while it is abnormal. is tilted, even when the tilt support lever is locked. Severe injury could occur if EMU29171 Checking propeller the outboard motor accidentally falls.

  • Page 59: Removing The Propeller

    Maintenance the battery cut-off switch if your boat has one. Do not use your hand to hold the pro- peller when loosening or tightening the propeller nut. Put a wood block be- tween the anti-cavitation plate and the propeller to prevent the propeller from turning.

  • Page 60: Installing The Propeller

    Apply Yamaha marine grease or a cor- Tilt the outboard motor so that the gear rosion resistant grease to the propeller oil drain screw is at the lowest point pos- shaft.

  • Page 61: Cleaning Fuel Tank

    If you have any question about properly into the gear case which can cause gear doing this procedure, consult your damage. Consult a Yamaha dealer for re- Yamaha dealer. pair of the lower unit seals. Keep away from sparks, cigarettes,...

  • Page 62: Inspecting And Replacing Anode(S)

    EMU29312 Inspecting and replacing anode(s) Yamaha outboard motors are protected from corrosion by sacrificial anodes. Inspect the ZMU03135 external anodes periodically. Remove scales from the surfaces of the anodes. Consult a Yamaha dealer for replacement of external anodes.

  • Page 63: Connecting The Battery

    NOTE: DO NOT SMOKE when charging or han- Consult a Yamaha dealer when charging or dling batteries. re-charging batteries. KEEP BATTERIES AND ELECTROLYTIC EMU29331 FLUID OUT OF REACH OF CHILDREN.

  • Page 64: Disconnecting The Battery

    ATIVE (-) terminal first. Then disconnect the ZMU01943 RED cable from the POSITIVE (+) terminal. EMU29390 Checking top cowling Check the fitting of the top cowling by push- ing it with both hands. If it is loose have it re- paired by your Yamaha dealer.

  • Page 65: 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 66 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 67 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 68: Temporary Action In Emergency

    EWM00630 Q. Is steering pivot loose or damaged? WARNING A. Tighten or have serviced by a Yamaha Be sure to use the specified fuse. An in- dealer. correct fuse or a piece of wire could allow EMU29433 excessive current flow.

  • Page 69: Power Trim And Tilt / Power Tilt Will Not Operate

    When the emergency starter rope is used to start the engine, the start-in- NOTE: gear protection device does not oper- Consult your Yamaha dealer if the new fuse ate. Make sure the remote control lever immediately blows again. is in neutral. Otherwise the boat could...

  • Page 70: Emergency Starting Engine

    Trouble Recovery other objects away when starting the the engine is in neutral and that the en- engine. Use the emergency starter rope gine stop switch lanyard lock plate is at- only as instructed. Do not touch the fly- tached to the engine stop switch. The wheel or other moving parts when the main switch must be “...

  • Page 71: Engine Fails To Operate

    Trouble Recovery OPEN CLOSE ZMU03429 ZMU03141 Squeeze the primer pump two or three NOTE: times to feed fuel. When the engine does not start with this pro- cedure, see page 66. EMU29670 Engine fails to operate EMU29704 Cold engine fails to start If the engine fails to start when it is cold, use the following procedure.

  • Page 72: Treatment Of Submerged Motor

    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 73 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 74: Consumer Information

    Consumer information EMU29811 Important warranty information for U.S.A. and Canada...
  • Page 75 Consumer information...

  • Page 76: Yamaha Motor Corporation, U.s.a. Outboard Motor Two Year Limited Warranty

    Consumer information EMU29820 YAMAHA MOTOR CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY...
  • Page 77 Consumer information...
  • Page 78 Consumer information...

  • Page 79: Important Warranty Information If You Use Your Yamaha Outside The Usa Or Canada

    Consumer information EMU29841 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA...
  • Page 82 Printed in Japan April 2006–0.8 × 1 ! Printed on recycled paper...
  • Page 83 (A l’usage du concessionnaire) MODÉLE ET NO. DE SÉRIE DU MOTEUR HORS-BORD (sur l’étiquette d’identification de la presse de fixation) YAMAHA DEALER NUMBER NO. DU CONCESSIONNAIRE YAMAHA DEALER NAME YAMAHA MOTOR CO., LTD. NOM DU MADE IN JAPAN CONCESSIONNAIRE PAYS D'ORIGINE JAPON USAGE...
  • Page 84 PLACE POSTAGE HERE ATTN: WARRANTY DEPARTMENT...

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