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
q Read this manual carefully before operating this
LIT-18626-08-36
outboard motor.
63B-28199-1K

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  • Page 1 OWNER’S MANUAL U.S.A.Edition q Read this manual carefully before operating this LIT-18626-08-36 outboard motor. 63B-28199-1K...
  • Page 2 EMU25062 ZMU01690 Read this manual carefully before operating this outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.

  • Page 3: Important Manual Information

    EMU25111 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

    Table of contents Safety information......1 Remote control requirements..14 Battery requirements..... 14 Outboard motor safety ....1 Specifications of Battery....14 Propeller..........1 Mounting battery ......14 Rotating parts........1 Multiple batteries ......15 Hot parts ........... 1 Propeller selection ......15 Electric shock ........
  • Page 5 Alert system ........30 Adjusting trim angle Overheat alert ......... 30 (Power trim and tilt)....... 49 Oil level alert and oil filter clogging Adjusting boat trim ......50 alert..........30 Tilting up and down....... 50 Installation ........32 Procedure for tilting up Installation ........
  • Page 6 Cold engine fails to start ....76 Treatment of submerged motor..77 Consumer information....78 YAMAHA MOTOR CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY ..78 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA ....81...

  • Page 7: Safety Information

    Safety information EMU33622 tor and the clamp bracket when the motor is Outboard motor safety trimmed or tilted. Keep body parts out of this Observe these precautions at all times. area at all times. Be sure no one is in this EMU36501 area before operating the power trim and tilt Propeller...

  • Page 8: Gasoline Exposure And Spills

    Personal flotation devices cording to the boat manufacturers instruc- Have an approved personal flotation device tions. Overloading or incorrect weight (PFD) on board for every occupant. Yamaha distribution can compromise the boats han-...

  • Page 9: Avoid Collisions

    Safety information dling and lead to an accident, capsizing or boating in hazardous weather. swamping. EMU33800 Accident reporting EMU33772 Avoid collisions Boat operators are required by law to file a Scan constantly for people, objects, and oth- Boating Accident Report with their state er boats.

  • Page 10: Passenger Training

    Safety information go to boatus.org. United States Power Squadrons 1-888-FOR-USPS (1-888-367-8777) EMU33880 Passenger training www.usps.org Make sure at least one other passenger is trained to operate the boat in the event of an Boat Owners Association of The United emergency. States EMU33890 1-800-336-BOAT (1-800-336-2628)

  • Page 11: Steering And Sailing Rules And Sound Signals

    Safety information EMU33700 vessels try to avoid each other. If that is the Steering and sailing rules and sound case, both vessels become “ Give-Way ” signals vessels. Whenever two vessels on the water meet EMU25521 Rules when encountering vessels one another, one vessel has the right-of- There are three main situations that you may way;...

  • Page 12: Other Special Situations

    Safety information EMU25531 Other special situations There are three other rules you should be aware of when driving your boat around oth- er vessels. Narrow channels and bends When navigating in narrow channels, you should keep to the right when it is safe and practical to do so.
  • Page 13 Safety information Reading buoys and other markers The waters of the United States are marked for safe navigation by the lateral system of buoyage. Simply put, buoys and markers have an arrangement of shapes, colors, numbers and lights to show which side of the buoy a boater should pass on when navigat- ing in a particular direction.
  • Page 14 Safety information ZMU01708...

  • Page 15: 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 ZMU02931 1.

  • Page 16: Read Manuals And Labels

    Read any manuals supplied with the boat. Read all labels on the outboard motor and the boat. If you need any additional information, contact your Yamaha dealer. EMU33831 Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements. ZMU06071...
  • Page 17 General information ZMU05670...
  • Page 18 General information EMU33843 Electrical hazard Symbols The following symbols mean as follows. Notice/Warning ZMU05666 Remote control lever/gear shift lever operat- ing direction, dual direction ZMU05696 Read Owner’s Manual ZMU05667 Engine start/ Engine cranking ZMU05664 Hazard caused by continuous rotation ZMU05668 ZMU05665...

  • Page 19: Specifications And Requirements

    Regular unleaded gasoline Idling speed (in neutral): Min. pump octane: 800 ±50 r/min Engine: Fuel tank capacity: Type: 25 L (6.60 US gal, 5.50 Imp.gal) 2-stroke L Recommended engine oil: Displacement: YAMALUBE 2-stroke outboard motor 698.0 cm Bore × stroke: Lubrication: 67.0 ×...

  • Page 20: Installation Requirements

    Propeller nut: working correctly and you should dis- 35.0 Nm (3.57 kgf-m, 25.8 ft-lb) continue using the outboard. Contact your Yamaha dealer. EMU33554 Installation requirements The remote control unit must be equipped EMU33563 with a start-in-gear protection device(s). This...

  • Page 21: Multiple Batteries

    Engine oil requirements where a different propeller would be more appropriate. Recommended engine oil: Your Yamaha dealer can help you select the YAMALUBE 2-stroke outboard motor right propeller for your boating needs. Select a propeller that will allow the engine to reach...

  • Page 22: Ring Free Fuel Additive

    10% and the fuel Ring Free Fuel Additive, available from meets the minimum octane ratings. E85 is a your Yamaha dealer. Ring Free Fuel Addi- fuel containing 85% ethanol and must not be tive has repeatedly proven its ability to clean used in your outboard motor.

  • Page 23: Motor Disposal Requirements

    This label is attached to the clamp bracket or with clip. the swivel bracket. Spare parts, such as an extra set of spark plugs. Consult your Yamaha dealer for details. EMU25221 Emission control information EMU25230 North American models This engine conforms to U.S. Environmental...
  • Page 24 Specifications and requirements ZMU04129 1. Manufactured date label location...

  • Page 25: Components

    Components EMU2579M Components diagram TIP: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. ZMU05014 EMU25802 1. Battery cable Fuel tank 2. Anode(s) If your model was equipped with a portable 3.

  • Page 26: Fuel Joint

    Components ZMU03157 1. Power trim and tilt switch 1. Fuel joint 2. Remote control lever 2. Fuel gauge 3. Neutral interlock trigger 3. Fuel tank cap 4. Neutral throttle lever 4. Air vent screw 5. Main switch 6. Engine shut-off switch EMU25830 Fuel joint 7.

  • Page 27: Neutral Interlock Trigger

    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 28: Throttle Grip

    Components 1. Throttle indicator 1. Forward “ ” 2. Neutral “ ” EMU25975 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 29: Engine Shut-Off Cord (Lanyard) And Clip

    Components When constant speed is desired, tighten the 1. Cord adjuster to maintain the desired throttle set- 2. Clip ting. 3. Engine shut-off switch EMU25993 Engine shut-off cord (lanyard) and clip The clip must be attached to the engine shut- off switch for the engine to run.

  • Page 30: Main Switch

    For instructions on using the power trim and “ ” (on) tilt switch, see pages 48 and 50. With the main switch in the “ ” (on) posi- tion, the electrical circuits are on, and the key cannot be removed.

  • Page 31: Trim Tab With Anode

    Components tilt switch, see page 50. the starboard side “B” in the figure. EWM01030 ECM00840 NOTICE WARNING Use the power trim and tilt switch located The trim tab also serves as an anode to on the bottom engine cowling only when...

  • Page 32: Tilt Support Lever For Power Trim And Tilt Model

    Components EMU26341 Tilt support lever for power trim and tilt model To keep the outboard motor in the tilted up position, lock the tilt support lever to the clamp bracket. ZMU02862 1. Cowling lock lever(s) ZMU03194 ECM00660 NOTICE Do not use the tilt support lever or knob when trailering the boat.

  • Page 33: Instruments And Indicators

    Instruments and indicators EMU31414 the power trim and tilt switch. Digital tachometer If the trim angle of your motor exceeds the The tachometer shows the engine speed trim operating range, the top segment on and has the following functions. the trim meter display will blink. All segments of the display will light momen- tarily after the main switch is turned on and will return to normal thereafter.

  • Page 34: Oil Level Indicator (Digital Type)

    Instruments and indicators EMU26551 Oil level indicator (digital type) This indicator shows the engine oil level. If the oil level falls below the lower limit, the alert indicator will start to blink. For further in- formation, see page 30. ECM00030 NOTICE Do not operate the engine without oil.

  • Page 35: Analog Trim Meter

    Instruments and indicators ZMU04580 1. Oil level indicators EMU26611 Analog trim meter This gauge shows the trim angle of your out- board motor. ZMU04581 Memorize the trim angles that work best for your boat under different conditions. Adjust the trim angle to the desired setting with the power trim and tilt switch.

  • Page 36: Engine Control System

    Alert system ECM00091 NOTICE Do not continue to operate the engine if a alert device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected. EMU2681A ZMU03025 Overheat alert This engine has an overheat-alert device. If...
  • Page 37 Engine control system nally oil filter clogging. ZMU04586 ZMU06662 1. Oil filter ZMU03942 The buzzer will sound (if equipped on the tiller handle, remote control box, or main switch panel). If the alert system has been activated, stop the engine and check for the cause. TIP: The alert for oil filter clogging is similar to the alerts for low oil level and overheating.

  • Page 38: Installation

    Test runs at differ- centerline (keel line) of the boat. ent heights can help determine the optimum mounting height. Consult your Yamaha deal- er or boat manufacturer for further informa- tion on determining the proper mounting...

  • Page 39: Clamping The Outboard Motor

    (if packed). For details, consult board motor because they could be- your Yamaha dealer. WARNING! Avoid come loose due to engine vibration. using bolts, nuts or washers other WARNING!
  • Page 40 Installation least the same quality of material and strength and must be tightened se- curely. After tightening, test run the engine and check their tightness. [EWM00651] ZMU03185 1. Bolts...

  • Page 41: Operation

    5 minutes at a time. After the first 10 hours: Operate the engine normally. Use only straight gasoline in the fuel tank. The Yamaha oil injection system provides proper lubrication for normal operation. EMU36400 Getting to know your boat : Gasoline Different boats handle differently.

  • Page 42: Fuel Level

    Check that the fuel filter is clean and free of lift off the cowling. water. If any water is found in the fuel, or if a significant amount of debris is found, the fuel tank should be checked and cleaned by a Yamaha dealer. ZMU06084 EMU36442 Fuel system EWM00060...

  • Page 43: Engine Shut-Off Cord (Lanyard)

    When operating the engine after a long peri- od (12 months) of storage, proceed as fol- lows: Use a 50:1 gasoline-oil mixture to start the engine. Start the engine. Leave it idling. 1. Cord WARNING! Do not touch or remove 2.

  • Page 44: Install Cowling

    Operation should supply oil normally. If no oil is flowing after 10 minutes of idling, consult your Yamaha dealer. ZMU06109 After installing, check the fitting of the top cowling by pushing it with both hands. If the ZMU03367 top cowling is loose, have it repaired by your Yamaha dealer.

  • Page 45: Battery

    Operation cording to this procedure to reduce the risk of fire and explosion. Gasoline is poisonous and can cause injury or death. Handle gasoline with care. Never siphon gasoline by mouth. If you should swallow some gasoline or inhale a lot of gasoline vapor, or get some gasoline in your eyes, see your doctor immediately.

  • Page 46: Filling Oil For Electric Start Models

    Open the oil tank filler cap by pulling the ture increases. tab on the cap. Fuel tank capacity: 25 L (6.60 US gal, 5.50 Imp.gal) Tighten the filler cap securely. 10. Wipe up any spilled gasoline immediate- ly with dry rags. Dispose rags properly according to local laws or regulations.

  • Page 47: Oil Level Indicator Operation

    Operation EMU27321 Oil level indicator operation The various functions of the oil level system are as follows: EMU27352 Electric start models Oil level-alert Oil level-alert indicator indicator (analog Engine oil tank Remarks (digital tachometer/ tachometer) bottom cowling) Green more than 450 No refilling necessary.

  • Page 48: Starting Engine

    Operation tank cap, loosen it 2 or 3 turns. on your outboard motor, securely attach the fuel line to the fuel line clamp. Squeeze the primer pump, with the ar- row pointing up, until you feel it become firm. During engine operation place the tank horizontally, otherwise fuel cannot be drawn from the fuel tank.
  • Page 49 Operation venting it from functioning. return the throttle to the fully closed po- Avoid accidentally pulling the cord dur- sition. ing normal operation. Loss of engine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be thrown forward.
  • Page 50 Operation the engine from starting except when in neu- TIP: tral. When the engine is cold, it needs to be Attach the engine shut-off cord to a se- warmed up. For further information, see cure place on your clothing, or your arm page 45.

  • Page 51: Checks After Starting Engine

    ” (off) position stops the engine. case or the cooling water pilot hole is Confirm that removing the clip from the en- blocked. Consult your Yamaha dealer if gine shut-off switch stops the engine. the problem cannot be located and cor- Confirm that the engine cannot be started rected.
  • Page 52 Operation swimmers or obstacles in the water near you. ECM01610 NOTICE Warm up the engine before shifting into gear. Until the engine is warm, the idle speed may be higher than normal. High idle speed can prevent you from shifting back to neutral.

  • Page 53: Stopping Boat

    Operation pact the steering wheel or other parts of the boat. This could increase the risk of serious injury. It could also damage the shift mechanism. Do not shift into reverse while traveling at planing speeds. Loss of control, boat swamping, or damage to the boat could occur.

  • Page 54: Trimming Outboard Motor

    Operation gine shut-off switch, then turning the main switch to “ ” (off). EMU27862 Trimming outboard motor EWM00740 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. This in- creases the possibility of an accident.

  • Page 55: Adjusting Trim Angle (Power Trim And Tilt)

    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 EMU27885 Adjusting trim angle (Power trim and DOWN tilt) ZMU03096 EWM00753...

  • Page 56: 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 57: Procedure For Tilting Up (Power Trim And Tilt Models)

    Operation EWM00221 WARNING Be sure all people are clear of the out- board motor when tilting up and down. Body parts can be crushed between the motor and the clamp bracket when the motor is trimmed or tilted. EWM00250 WARNING Press the power trim and tilt switch “...

  • Page 58: Procedure For Tilting Down (Power Trim And Tilt Models)

    Operation and tilt switch “ ” (down) to retract the trim rods. NOTICE: Be sure to retract the trim rods completely during mooring. This protects the rods from marine growth and corrosion which could damage the power trim and tilt mechanism.

  • Page 59: Shallow Water

    Operation DOWN ZMU03410 Slightly tilt the outboard motor up to the EMU28061 Shallow water desired position using the power trim EMU32851 and tilt switch. WARNING! Using the Power trim and tilt models power trim and tilt switch on the bot- The outboard motor can be tilted up partially tom cowling while the boat is moving to allow operation in shallow water.

  • Page 60: Cruising In Other Conditions

    Cruising in muddy, turbid, or acidic water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (see page 16) if you use the outboard motor in acidic water or water with a lot of sediment in it, such as muddy or turbid (cloudy) water.

  • Page 61: Maintenance

    Fill the fuel tank with fresh fuel and add sition using a motor support device such as one ounce of “Yamaha Fuel Conditioner a transom saver bar. Consult your Yamaha and Stabilizer” to each gallon of fuel. dealer for further details.

  • Page 62: Lubrication (Oil Injection Models)

    Maintenance fuel system. Consult your Yamaha dealer or minutes in neutral position. other qualified mechanic if the fuel system is Just prior to turning off the engine, quick- to be drained instead. ly spray “Yamaha Stor-Rite Engine Remove the engine top cowling and si- Fogging Oil”...

  • Page 63: Checking Painted Surface Of Motor

    Yamaha marine dealership. and paint the areas. A touch-up paint is avail- A service manual is available for purchase able from your Yamaha dealer. through your Yamaha dealer for owners who EMU2848A have the mechanical skills, tools, and other Periodic maintenance...
  • Page 64 More fre- quent maintenance will often pay off many times over in increased engine life and great- er owner satisfaction. Consult your Yamaha dealer for additional maintenance recom- mendations.

  • Page 65: Maintenance Chart 1

    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 20 hours Item...
  • Page 66 Maintenance Initial Every 20 hours Item Actions hours hours hours months) (1 year) (3 years) (5 years) Fuel line(High pres- Inspection or replace- sure) ment as necessary Fuel line(Low pres- Inspection sure) Fuel line(Low pres- Inspection or replace- sure) ment as necessary Inspection or replace- Fuel pump ment as necessary...

  • Page 67: Maintenance Chart 2

    Wire harness connec- Inspection or replace- tions/wire coupler con- ment as necessary nections (Yamaha) Meter/gauge Inspection Inspection and clean- (Yamaha) Fuel tank ing as necessary EMU34451 Maintenance chart 2 Every Item Actions 1000 hours Exhaust guide/exhaust Inspection or replace-...

  • Page 68: Greasing

    Maintenance EMU28932 Greasing Yamaha marine grease (Water resistant grease) ZMU03414 Instead, take the outboard motor to a EMU28956 Cleaning and adjusting spark plug Yamaha dealer. You should periodically re- The spark plug is an important engine com- move and inspect the spark plug because ponent and is easy to inspect.

  • Page 69: Checking Fuel Filter

    For cleaning or replacement of the Be sure to use the specified spark plug, fuel filter, consult your Yamaha dealer. otherwise the engine may not operate properly. Before fitting the spark plug, measure the electrode gap with a wire thickness gauge;...

  • Page 70: Checking Water In Engine Oil Tank

    13. If you have difficulty verify- EMU32112 Checking propeller ing the idle speed, or the idle speed re- quires adjustment, consult a Yamaha EWM01881 WARNING dealer or other qualified mechanic. You could be seriously injured if the en-...

  • Page 71: Removing Propeller

    Otherwise the propeller could come off during opera- tion and be lost. Check the propeller shaft oil seal for dam- Apply Yamaha marine grease or a cor- age. rosion resistant grease to the propeller EMU30662 shaft.

  • Page 72: Changing Gear Oil

    Con- or knob is locked. Severe injury could sult a Yamaha dealer for repair of the occur if the outboard motor accidental- lower unit seals. [ECM00711] ly falls.

  • Page 73: Cleaning Fuel Tank

    Insert and tighten the gear oil EMU29312 drain screw. Inspecting and replacing anode(s) Yamaha outboard motors are protected from Tightening torque: corrosion by sacrificial anodes. Inspect the 9 Nm (0.9 kgf-m, 6.6 ft-lb) external anodes periodically. Remove scales from the surfaces of the anodes.

  • Page 74: Checking Battery (For Electric Start Models)

    ZMU03418 tery’s charge. If the battery needs charg- EMU29322 ing, consult your Yamaha dealer. Checking battery (for electric start Check the battery connections. They models) should be clean, secure, and covered by EWM01900 an insulating cover.

  • Page 75: Connecting The Battery

    Maintenance EMU29333 they are left on, the electrical system Connecting the battery can be damaged. [ECM01930] EWM00570 Disconnect the negative cable(s) from WARNING the negative (-) terminal. NOTICE: Al- Mount the battery holder securely in a ways disconnect all negative (-) ca- dry, well-ventilated, vibration-free loca- bles first to avoid a short circuit and tion in the boat.

  • Page 76: 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-alert indicator is flash- Q. Are spark plug(s) fouled or of incorrect ing, consult your Yamaha dealer.
  • Page 77 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 78 Q. Is fuel system obstructed? Q. Is water pump or thermostat faulty? A. Check for pinched or kinked fuel line or A. Have serviced by a Yamaha dealer. other obstructions in fuel system. Q. Is there excess water in fuel filter cup? Q.

  • Page 79: Temporary Action In Emergency

    EWM00631 Q. Is steering pivot loose or damaged? WARNING A. Tighten or have serviced by a Yamaha Substituting an incorrect fuse or a piece dealer. of wire could allow excessive current EMU29433 flow.

  • Page 80: Power Trim And Tilt Will Not Operate

    3. Spare fuse (20 A) gear protection device does not oper- ate. Make sure the remote control lever Consult your Yamaha dealer if the new fuse is in neutral. Otherwise the boat could immediately blows again. unexpectedly start to move, which...

  • Page 81: Emergency Starting Engine

    Trouble Recovery wheel or other moving parts when the equipped. engine is running. Do not install the 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.

  • Page 82: Engine Fails To Operate

    Trouble Recovery TIP: When the engine does not start with this pro- cedure, see page 76. EMU29671 Engine fails to operate EMU29706 Cold engine fails to start If the engine fails to start when it is cold, use the following procedure. ZMU03142 EWM00410 WARNING...

  • Page 83: Treatment Of Submerged Motor

    Trouble Recovery running. Do not keep the starter mo- ately take it to a Yamaha dealer. Otherwise tor turning for more than 5 seconds. If some corrosion may begin almost immedi- the starter motor is turned continu- ately. NOTICE: Do not attempt to run the...

  • Page 84: Consumer Information

    Consumer information EMU29820 YAMAHA MOTOR CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY...
  • Page 85 Consumer information...
  • Page 86 Consumer information...

  • Page 87: 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 90 Printed in Japan April 2009–0.1 × 1 ! Printed on recycled paper...

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