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Table of Contents

Summary of Contents for Yamaha 150

  • Page 1 OWNER’S MANUAL U.S.A.Edition LIT-18626-06-98 64C-28199-1C...
  • 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

    Table of contents General information ......1 Oil level indicators (three indicators) ......17 Identification numbers record..1 Oil level indicator (digital type) ..18 Outboard motor serial number ..1 Overheat warning indicator Key number........1 (digital type) ........18 Emission control information ...
  • Page 5 Greasing ......... 48 IMPORTANT WARRANTY Cleaning and adjusting spark INFORMATION IF YOU USE plug ..........48 YOUR YAMAHA OUTSIDE THE Checking fuel system ...... 49 USA OR CANADA ...... 73 Inspecting fuel filter ......50 Cleaning fuel filter ......50 Inspecting idling speed ....
  • 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

    General information should give you an understanding of the motor and its operation. Before operating the boat, read any own- EMISSION CONTROL INFORMATION er’s or operator’s manuals supplied with it ENGINE FAMILY : THIS ENGINE CONFORMS TO 2001 U.S. EPA REGULATIONS FOR MARINE SI ENGINES. REFER TO THE OWNERS MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
  • 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 United States Coast Guard and local agen- cies. You should be aware of these rules, and follow them whenever you encounter another vessel on the water. Several sets of rules prevail according to geographic location, but are all basically the same as the International Rules of the Road.
  • Page 10: Rules When Encountering Vessels

    General information operator of the other vessel can see what you are doing. “The general prudential rule” This rule is called Rule 2 in the International Rules and says, “In obeying and construing these rules due regard shall be had to all dangers of naviga- tion and collision, and to any special circum- stances, which may render a departure from the above rules necessary in order to avoid...
  • Page 11: Other Special Situations

    General information or trawls are considered to be “fishing ves- sels” under the International Rules. Vessels with trolling lines are not considered fishing vessels. Fishing vessels have the right-of- way regardless of position. Fishing vessels cannot, however, impede the passage of other vessels in narrow channels.
  • Page 12 General information This system uses buoys and signs with dis- tinctive shapes and colors to show regulato- ry or advisory information. These markers are white with black letters and orange boarders. They signify speed zones, restrict- ed areas, danger areas, and general infor- mation.
  • Page 13: 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 14: Gasoline

    Gasohol containing ethanol can be used if ethanol content does not exceed 10% and the fuel meets minimum octane ratings. Yamaha does not recommended gasohol containing methanol because it can cause fuel system damage or engine performance problems.
  • Page 15: Battery Specifications

    Yamaha outboard motors are fitted with pro- pellers chosen to perform well over a range For instructions on propeller removal and in- of applications, but there may be uses where stallation, see page 53.
  • Page 16: Basic Components

    Basic components EMU25797 Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. ZMU04662 1. Power trim and tilt switch 15. Digital tachometer* 2. Flushing device 16. Digital speedometer* 3.
  • Page 17: Remote Control Lever

    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. Power trim and tilt switch 2. Remote control lever 3. Neutral interlock trigger 4. Neutral throttle lever 5.
  • Page 18: Choke Switch

    Basic components adjuster counterclockwise. EWM00031 WARNING Do not overtighten the friction adjuster. If there is too much resistance, it could be difficult to move the remote control lever or throttle grip, which could result in an accident. 1. Fully open 2.
  • Page 19: Choke Knob For Pull Type

    Basic components gled, preventing it from functioning. EMU26090 Main switch Avoid accidentally pulling the lanyard The main switch controls the ignition system; during normal operation. Loss of en- its operation is described below. gine power means the loss of most “...
  • Page 20: Power Trim And Tilt Switch On Bottom Engine Cowling

    Basic components ZMU03517 EMU26151 NOTE: Power trim and tilt switch on bottom For instructions on using the power trim and engine cowling tilt switch, see page 36. 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 21: Tilt Support Lever For Power Trim And Tilt Or Hydro Tilt Model

    Basic components EMU26382 Top cowling lock lever (pull up type) To remove the engine top cowling, pull up the lock lever(s) and lift off the cowling. When installing the cowling, check to be sure it fits properly in the rubber seal. Then lock the cowling by moving the lever(s) down- ward.
  • Page 22: Tachometer

    Basic components ZMU04011 ZMU01958 1. Flushing device 1. Tachometer 2. Trim meter EMU26470 3. Hour meter Tachometer 4. Oil level indicator This gauge shows the engine speed and has 5. Overheat warning indicator the following functions. 6. Water separator warning indicator 7.
  • Page 23: Oil Level Indicator (Digital Type)

    Basic components page 21. ECM00050 CAUTION: Do not continue to run the engine if the overheat warning indicator is on. Serious engine damage will occur. ZMU04580 1. Oil level indicators EMU26550 Oil level indicator (digital type) This indicator shows the engine oil level. If the oil level falls below the lower limit, the ZMU01868 warning indicator will start to blink.
  • Page 24: Trim Meter

    Basic components turning on the main switch to make sure all power trim and tilt switch. segments come on. EMU26620 Trim meter (digital type) NOTE: This meter shows the trim angle of your out- The speedometer displays km/h, mph, or board motor.
  • Page 25: Trip Meter

    The trip distance is shown in kilometers or CAUTION: miles depending upon the unit of measure- The Yamaha fuel tank sensor differs from ment selected for the speedometer. conventional sensors. Incorrectly setting The trip distance is kept in memory by bat- the selector switch on the gauge will give tery power.
  • Page 26: Fuel Warning Indicator

    Do not continue to operate the engine if a activated. Get back to the port within troll- warning device has activated. Consult ing engine speed. your Yamaha dealer if the problem can- not be located and corrected. EMU26816 Overheat warning This engine has an overheat warning device.
  • Page 27: Oil Level Warning And Oil Filter Clogging Warning

    Basic components ZMU02630 ZMU01757 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 ZMU04766 to about 2000 r/min.
  • Page 28 Basic components ZMU04586 ZMU03906 The buzzer will sound (if equipped on the 1. Oil filter tiller handle, remote control box, or main switch panel). ZMU01952 ZMU03025 If the warning system has been activated, 1. Oil filter stop the engine and check for the cause. NOTE: The warning for oil filter clogging is similar to the warnings for low oil level and overheat-...
  • 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: Breaking In Engine

    Be sure to mix gasoline and oil complete- mine the optimum mounting height. Con- ly, otherwise the engine may be dam- sult your Yamaha dealer boat aged. manufacturer for further information on de- EMU30311 termining the proper mounting height.
  • Page 31: Preoperation Checks

    Make sure there are no fuel leaks or gaso- from the flywheel and other rotating line fumes. parts while the engine is running. Check fuel line connections to be sure they are tight (if equipped Yamaha fuel tank or Watch for oil flowing through the oil feed...
  • Page 32: Filling Fuel And Engine Oil

    Yamaha recommends the use of Ring Free Fuel Additive, available from Be sure to take the above steps when op- your Yamaha dealer. Ring Free Fuel Addi- erating the engine after a long period of tive has repeatedly proven its ability to clean storage.
  • Page 33 Imp gal) can be added, and the bottom oil level line indicates approximately 3.8 L (1 US gal, 0.8 Imp gal) can be added. Turn on the main switch. The Yamaha oil injection system will automatically feed oil from the remote oil tank to the engine oil tank.
  • Page 34: Oil Level Indicator Operation

    Operation EMU27321 Oil level indicator operation The various functions of the oil level system are as follows: EMU27381 Oil level indicator Electric start models Oil level warning Oil level warning Engine oil Remote oil indicator indicator (analog Remarks tank tank (digital tachometer) tachometer)
  • Page 35: Operating Engine

    Operation EMU27450 Operating engine EMU27482 Feeding fuel EWM00420 WARNING Before starting the engine, make sure that the boat is tightly moored and that you can steer clear of any obstructions. Be sure there are no swimmers in the water near you. 1.
  • Page 36 Operation your arm or leg while operating. 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. Avoid accidentally pulling the lanyard during normal operation. Loss of en- gine power means the loss of most steering control.
  • Page 37: Warming Up Engine

    Immediately after the engine starts, re- the lower case or the cooling water pilot lease the main switch and allow it to re- hole is blocked. Consult your Yamaha turn to “ ” (on). dealer if the problem cannot be located ECM00191 and corrected.
  • Page 38: Forward (Tiller Handle And Remote Control Models)

    Operation EMU27764 which could result in loss of control and Forward (tiller handle and remote an accident. control models) Tiller handle models Tiller handle models Place the throttle grip in the fully closed Place the throttle grip in the fully closed position.
  • Page 39: Trimming Outboard Motor

    Operation turn the main switch to “ ” (off). angle depends upon the combination of boat, engine, and propeller. Correct trim is also affected by variables such as the load in the boat, sea conditions, and running speed. EWM00740 WARNING Excessive trim for the operating condi- tions (either trim up or trim down) can cause boat instability and can make...
  • Page 40: Adjusting Boat Trim

    Operation board motor when adjusting the tilt an- To raise the bow (trim-out), press the switch gle, also be careful not to pinch any “ ” (up). body parts between the drive unit and To lower the bow (trim-in), press the switch clamp bracket.
  • Page 41: Tilting Up And Down

    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 Bow Down Leaking fuel is a fire hazard.
  • Page 42: Procedure For Tilting Down

    Operation Disconnect the fuel line from the out- to support it with the tilt support knob or board motor or close the fuel cock. tilt support lever. Otherwise the outboard Press the power trim and tilt switch / motor could fall back down suddenly if oil power tilt switch “...
  • Page 43: 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 ZMU03453 CAUTION:...
  • Page 44: Cruising In Other Conditions

    For cooling system flushing instructions, see page 41. 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...
  • Page 45: Maintenance

    Power trim and tilt Performance: Propeller mark: Full throttle operating range: 4500–5500 r/min Fuel and oil: Maximum output: Recommended fuel: 110.3 kW@5000 r/min (150 Regular unleaded gasoline HP@5000 r/min) Min. pump octane: Idling speed (in neutral): 700 ±25 r/min Recommended engine oil: Engine:...
  • Page 46: 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. 55.0 Nm (40.6 ft-lb) (5.61 kgf-m)
  • Page 47: Lubrication (Oil Injection Models)

    NOTE: damage due to rust. Perform the flush- The use of “Yamaha Fuel Conditioner and ing and fogging at the same time. Stabilizer” eliminates the need to drain the EWM00090 fuel system.
  • Page 48: Cleaning And Anticorrosion Measures

    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 48.
  • Page 49: Cleaning The Outboard Motor

    Maintenance overheating can result. Tighten the connector securely. ECM00540 After shutting off the engine, unscrew CAUTION: the garden hose connector from the fit- Do not leave the garden hose connector ting on the bottom cowling. loose on the bottom cowling fitting or let the hose hang free during normal opera- tion.
  • Page 50: Periodic Maintenance

    If you or the owner is not famil- iar with machine servicing, this work should be done by your Yamaha dealer or other qualified mechanic. Maintenance, replacement, or repair of the emission control devices and sys- tems may be performed by any marine engine repair establishment or individual.
  • Page 51: 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 52 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 / Spark plug(s) replacement...
  • Page 53: Greasing

    Maintenance EMU28931 Greasing Yamaha marine grease (Water resistant grease) ZMU03912 sparks, which could lead to explosion or EMU28952 Cleaning and adjusting spark plug fire. EWM00560 The spark plug is an important engine com- WARNING ponent and is easy to inspect. The condition...
  • Page 54: Checking Fuel System

    Check the fuel lines for leaks, crack, or mal- 1. Spark plug gap function. If a problem is found, your Yamaha 2. Spark plug I.D. mark (NGK) 3. Spark plug part number dealer or other qualified mechanic should re- pair it immediately.
  • Page 55: Inspecting Fuel Filter

    If you have any question about properly necessary. If any water is found in the doing this procedure, consult your fuel, the Yamaha portable fuel tank or Yamaha dealer. other fuel tanks should be checked and Do not perform this procedure on a hot cleaned.
  • Page 56: Inspecting Idling Speed

    There is a water trap at the bottom of the en- filter assembly. gine oil tank. If water or foreign matter is vis- Run the engine and check the filter and ible in this trap, consult your Yamaha dealer. lines for leaks. EMU29041 Inspecting idling speed...
  • Page 57: Water Leakage

    Maintenance cover, cylinder head, and body cylinder. ported by the tilt support lever. EMU29130 Water leakage Start the engine and check that no water leaks from the joints between the exhaust cover, cylinder head, and body cylinder. EMU29153 Checking power trim and tilt system EWM00430 WARNING Never get under the lower unit while it...
  • Page 58: Checking Propeller

    Maintenance smoothly. NOTE: Consult your Yamaha dealer if any operation is abnormal. EMU29171 Checking propeller EWM00321 WARNING You could be seriously injured if the en- ZMU01897 gine accidentally starts when you are Checkpoints near the propeller. Check each of the propeller blades for...
  • Page 59: Removing The Propeller

    Severe injury could the propeller could come off during op- occur if the outboard motor accidental- eration and be lost. ly falls. Apply Yamaha marine grease or a cor- Tilt the outboard motor so that the gear...
  • Page 60: Inspecting And Replacing Anode(S)

    If the oil is milky, water is getting Yamaha dealer for replacement of external into the gear case which can cause gear anodes. damage. Consult a Yamaha dealer for re- ECM00720 pair of the lower unit seals. CAUTION: NOTE:...
  • Page 61: Checking Battery (For Electric Start Models)

    Maintenance Yamaha dealer for inspection and replace- dling or working near batteries. ment of internal anodes attached to the pow- Antidote (EXTERNAL): er unit. SKIN - Flush with water. EYES - Flush with water for 15 minutes and get immediate medical attention.
  • Page 62: Connecting The Battery

    Electric system damage and a fire of the fluid at least once a month and re- could result. charge the battery when it is low. NOTE: Consult a Yamaha dealer when charging or re-charging batteries. EMU29341 Connecting the battery EWM00570...
  • Page 63: Disconnecting The Battery

    7. Small red lead for accessory battery charg- ing (optional part) NOTE: Consult your Yamaha dealer about correct wiring if a battery selector switch is desired. EMU29370 Disconnecting the battery Disconnect the BLACK cable from the NEG- ATIVE (-) terminal first.
  • Page 64: 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 65 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 66 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 67: 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 EMU29432 excessive current flow.
  • Page 68: 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 69: Emergency Starting Engine

    Trouble Recovery engine. Use the emergency starter rope only as instructed. Do not touch the fly- wheel or other moving parts when the 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-...
  • Page 70: Engine Fails To Operate

    Trouble Recovery or stopping. ECM00380 CAUTION: Follow this procedure only in an emer- gency and just long enough to return to port for repairs. ZMU03466 Give a strong pull straight out to crank and start the engine. Repeat if neces- sary.
  • Page 71: Treatment Of Submerged Motor

    EMU29760 Treatment of submerged motor If the outboard motor is submerged, immedi- ately take it to a Yamaha dealer. Otherwise some corrosion may begin almost immedi- ately. If you cannot immediately take the outboard motor to a Yamaha dealer, follow the proce-...
  • Page 72 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 73: Consumer Information

    Consumer information EMU29811 Important warranty information for U.S.A. and Canada...
  • Page 74 Consumer information...
  • Page 75: Yamaha Motor Corporation, U.s.a. Outboard Motor Two Year Limited Warranty

  • Page 76 Consumer information...
  • Page 77 Consumer information...
  • Page 78: Important Warranty Information If You Use Your Yamaha Outside The Usa Or Canada

  • Page 80 Printed in Japan May 2006–0.1 × 1 ! Printed on recycled paper...

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