EMU25100 your machine and this manual. If there is any To the owner question concerning this manual, please con- Thank you for choosing a Yamaha outboard sult your Yamaha dealer. motor. This Owner’s Manual contains infor- NOTE: mation needed for proper operation, mainte- The F150TR, LF150TR and the standard ac- nance and care.
Table of contents Tilt support lever for power trim General information ...... 1 and tilt or hydro tilt model..17 Identification numbers record ..1 Top cowling lock lever Outboard motor serial number ..1 (pull up type) ......17 Key number ........
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Table of contents Operating engine....... 29 Greasing ........48 Cleaning and adjusting Feeding fuel........29 spark plug ......... 48 Starting engine ......29 Checking fuel system ....49 Warming up engine ....31 Inspecting fuel filter ...... 50 Manual start and electric start Cleaning fuel filter......
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Table of contents YAMAHA MOTOR CORPORATION, U.S.A. FOUR-STROKE OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTY ... 69 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE U.S.A. OR CANADA ....71...
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...
General information ZMU01699 1. Star labels location EMU25261 Manufactured date label EMU25280 One Star—Low Emission This label is attached to the clamp bracket or The one-star label identifies engines that the swivel bracket. meet the Air Resources Board’s 2001 ex- haust emission standards.
General information the rated horsepower capacity of the boat. If the rated horsepower capacity of the boat is unknown, consult the dealer or boat man- ufacturer. Do not modify the outboard. Modifications could make the motor unfit or unsafe to use. Never operate after drinking alcohol or tak- ing drugs.
General information Stay informed about the weather. Check EMU25380 Important labels weather forecasts before boating. Avoid EMU25395 boating in hazardous weather. Warning labels Tell someone where you are going: leave a Float Plan with a responsible person. Be sure to cancel the Float Plan when you re- turn.
General information driving your boat. These rules are used inter- pass behind the other vessel. You should al- nationally, and are also enforced by the Unit- ways move in such a way that the operator of ed States Coast Guard and local agencies. the other vessel can see what you are doing.
General information Meeting Overtaking If you are meeting another power vessel head If you are passing another vessel, you are the on, and are close enough to run the risk of col- “Give-Way” vessel. This means that the other lision, neither of you has the right-of-way! vessel is expected to maintain its course and Both of you should alter course to avoid an ac- speed.
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General information Fishing vessel right-of-way System has been devised for these waters. All vessels which are fishing with nets, lines or This system uses buoys and signs with dis- trawls are considered to be “fishing vessels” tinctive shapes and colors to show regulatory under the International Rules.
General information ZMU01708 EMU25540 Do not smoke when refueling, and keep Fueling instructions away from sparks, flames, or other EWM00010 sources of ignition. WARNING Stop engine before refueling. GASOLINE AND ITS VAPORS ARE HIGH- Refuel in a well-ventilated area. Refuel LY FLAMMABLE AND EXPLOSIVE! portable fuel tanks off the boat.
Gasohol containing ethanol can be used if ethanol content does not exceed 10% and the ECM01060 CAUTION: fuel meets minimum octane ratings. Yamaha does not recommended gasohol containing Do not use a battery that does not meet the methanol because it can cause fuel system specified capacity.
General information tric system could perform poorly or be Yamaha dealers stock a range of propellers, overloaded, causing electric system dam- and can advise you and install a propeller on age. your outboard that is best suited to your appli- cation.
Basic components EMU25795 Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all models. EMU26180 1. Top cowling Remote control 2. Top cowling lock lever(s) The remote control lever actuates both the 3.
Basic components After the button is pushed, the throttle be- NOTE: gins to open after the remote control lever is The neutral throttle lever will operate only moved at least 35°. when the remote control lever is in neutral. After using the free accelerator, return the The remote control lever will operate only remote control lever to the neutral position.
Basic components NOTE: The engine cannot be started with the lock plate removed. ZMU04646 When constant speed is desired, tighten the adjuster to maintain the desired throttle set- ting. EMU25990 1. Lanyard Engine stop lanyard switch 2. Lock plate The lock plate must be attached to the engine stop switch for the engine to run.
Basic components With the main switch in the “ ” (start) po- sition, the starter motor turns to start the en- gine. When the key is released, it returns automatically to the “ ” (on) position. EMU26151 Power trim and tilt switch on bottom engine cowling The power trim and tilt switch is located on the side of the bottom engine cowling.
Basic components For instructions on using the power trim and tilt switches, see pages 33 and 35. EMU26240 Trim tab with anode The trim tab should be adjusted so that the steering control can be turned to either the right or left by applying the same amount of force.
Basic components 1. Top cowling lock lever(s) EMU26340 Tilt support lever for power trim and EMU26460 Flushing device tilt or hydro tilt model This device is used to clean the cooling water To keep the outboard motor in the tilted up po- passages of the motor using a garden hose sition, lock the tilt support lever to the clamp and tap water.
Basic components EMU26620 Trim meter (digital type) This meter shows the trim angle of your out- board motor. NOTE: Memorize the trim angles that work best for your boat under different conditions. Adjust the trim angle to the desired using the pow- er trim and tilt switch.
CAUTION: The trip distance is shown in kilometers or 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.
For charging the bat- attitude of the boat in the water. Operation tery, consult your Yamaha dealer. with bow-up trim or continuous turning can give false readings.
Basic components mal operation. Watch the gauge when turning on the main switch to make sure all segments come on. EMU26750 Fuel flow meter The fuel flow meter displays the amount of fuel flow over a one hour period, at the current rate of engine operation.
(winter or summer fuel and amount of addi- tives). The Yamaha digital speedometer and fuel management meter calculates speed, miles traveled, and fuel economy by water movement at the stern of the boat. This dis-...
START START CAUTION: Do not continue to operate the engine if a warning device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected. ZMU04584 EMU26822 Overheat warning (twin engines) If the warning system has activated, stop the This engine has an overheat warning device.
If the oil crease to about 2000 r/min. level is correct and the warning device does The low oil pressure warning indicator will not switch off, consult your Yamaha dealer. light. ECM00100 CAUTION: Do not continue to run the engine if the low oil pressure warning indicator is on.
Operation EMU26901 EWM00830 Installation WARNING ECM00110 Improper mounting of the outboard motor CAUTION: could result in hazardous conditions such Incorrect engine height or obstructions to as poor handling, loss of control, or fire smooth water flow (such as the design or hazards.
Test runs at different heights can help determine the optimum mounting height. Consult your Yamaha dealer or boat manufacturer for further information on determining the prop- er mounting height. For instructions on setting the trim angle of 1.
Make sure there are no fuel leaks or gaso- line fumes. Check fuel line connections to be sure they are tight (if equipped Yamaha fuel tank or boat tank). Be sure the fuel tank is positioned on a se- cure, flat surface, and that the fuel line is not 1.
Squeeze the primer pump with the outlet While many additives available may reduce end up until you feel it become firm. deposits, Yamaha recommends the use of Ring Free Fuel Additive, available from your Yamaha dealer. Ring Free Fuel Additive...
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Operation Avoid accidentally pulling the lanyard NOTE: during normal operation. Loss of engine The start-in-gear protection device prevents power means the loss of most steering the engine from starting except when in neu- control. Also, without engine power, the tral. boat could slow rapidly.
START gine damage could occur. Check the oil level and add oil if necessary. Consult your Yamaha dealer if the cause for the low oil pressure warning indicator can- not be found. A continuous flow of water from the pilot...
Operation hole is blocked. Consult your Yamaha Remote control models dealer if the problem cannot be located Pull up the neutral interlock trigger (if and corrected. equipped) and move the remote control lever If the cooling passage is frozen, it may quickly and firmly from neutral to forward.
Operation Remote control models Pull up the neutral interlock trigger (if equipped) and move the remote control lever quickly and firmly from neutral to reverse. ZMU04600 After stopping the engine, disconnect the fuel line or close the fuel cock if there is a fuel joint or a fuel cock on the boat.
Operation engine, and propeller. Correct trim is also af- Use the power tilt switch located on the fected by variables such as the load in the bottom engine cowling (if equipped) boat, sea conditions, and running speed. only when the boat is at a complete stop EWM00740 with the engine off.
Operation EMU27911 Bow Down Adjusting boat trim Too much trim-in causes the boat to “plow” When the boat is on plane, a bow-up attitude through the water, decreasing fuel economy results in less drag, greater stability and effi- and making it hard to increase speed. Operat- ciency.
Operation EWM00250 WARNING Leaking fuel is a fire hazard. If there is a fuel joint on the outboard motor, discon- nect the fuel line or close the fuel cock if the engine will be tilted for more than a few minutes.
Operation ECM00250 CAUTION: 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. EMU28052 Procedure for tilting down Power trim and tilt models / power tilt models Push the power tilt / power trim and tilt Push the tilt support knob into the clamp switch “...
Operation ting up for and cruising in shallow water. Otherwise severe damage from overheat- ing can result. EMU28184 Procedure for power trim and tilt / power tilt models Place the gear shift lever in neutral. ZMU04603 EMU28060 Cruising in shallow water The outboard motor can be tilted up partially to allow operation in shallow water.
NOTE: 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 if you use the outboard motor in turbid (mud- dy) water conditions.
Leaking fuel is a fire hazard. When trans- is advisable to have your outboard motor ser- porting and storing the outboard motor, viced by an authorized Yamaha dealer prior to close the air vent screw and fuel cock to storage. However, you, the owner, with a min- prevent fuel from leaking.
00) to each gallon of fuel. 1. Flushing attachment NOTE: Cooling system flushing is essential to The use of “Yamaha Fuel Conditioner and prevent the cooling system from clogging Stabilizer” eliminates the need to drain the up with salt, sand, or dirt. In addition, fog- fuel system.
LUB-SILCNE-13-00). KEEP BATTERIES AND ELECTROLYTIC Wax the cowling with a non-abrasive wax FLUID OUT OF REACH OF CHILDREN. such as “Yamaha Silicone Wax” (Part No. ACC-11000-15-02). Batteries vary among manufacturers. There- fore the following procedures may not always apply. Consult your battery manufacturer’s in-...
Maintenance Procedure 3. Garden hose Disconnect and remove the battery from Screw the garden hose connector onto a the boat. Always disconnect the black garden hose which is connected to a negative cable first to prevent the risk of fresh water supply. shorting.
EMU28510 Replacement parts If replacement parts are necessary, use only genuine Yamaha parts or parts of the same type and of equivalent strength and materials. Any part of inferior quality may malfunction, and the resulting loss of control could endan- NOTE: ger the operator and passengers.
Expendable or consumable parts and lubricants will lose their effectiveness over time and through normal usage regardless of the warranty period. 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 Item Actions...
Do not attempt to di- sparks, which could lead to explosion or agnose any problems yourself. Instead, take fire. the outboard motor to a Yamaha dealer. You should periodically remove and inspect the...
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.
If you have any question about properly sary. If any water is found in the fuel, the doing this procedure, consult your Yamaha portable fuel tank or other fuel Yamaha dealer. tanks should be checked and cleaned. Do not perform this procedure on a hot or running engine.
If so, remove the cup higher than normal. If you have difficulty veri- and drain the water. fying the idle speed, or the idle speed requires adjustment, consult a Yamaha dealer or other qualified mechanic.
Maintenance Verify whether the idle speed is set to specification. For idle speed specifica- tions, see page 40. EMU29073 Changing engine oil EWM00760 WARNING Avoid draining the engine oil immediate- ly after stopping the engine. The oil is hot and should be handled with care to avoid burns.
Consult EMU29130 Water leakage your Yamaha dealer if the problem cannot Start the engine and check that no water be located and corrected. leaks from the joints between the exhaust Turn off the engine and wait 3 minutes.
Maintenance Check that the tilt rod and trim rods are NOTE: free of corrosion or other flaws. If any leaks are found, consult your Yamaha Activate the tilt-down switch until the trim dealer. rods have retracted completely into the EMU29153 cylinders.
Maintenance Do not use your hand to hold the propel- ler when loosening or tightening the propeller nut. Put a wood block between the anti-cavitation plate and the propel- ler to prevent the propeller from turning. Check the propeller shaft oil seal for dam- age.
You could be severely injured if Apply Yamaha marine grease or a corro- the outboard motor falls on you. sion resistant grease to the propeller Never get under the lower unit while it is shaft.
NOTE: NOTE: For disposal of used oil consult your Yamaha Inspect ground leads attached to external an- dealer. odes on equipped models. Consult a Yamaha With the outboard motor in a vertical po-...
Maintenance Drink large quantities of water or milk followed by milk of magnesia, beaten egg, or vegetable oil. Get immediate medical attention. Batteries also generate explosive hydro- gen gas; therefore, you should always fol- low these preventive measures: Charge batteries in a well-ventilated ar- Keep batteries away from fire, sparks, or open flames (for example: welding equipment, lighted cigarettes, and so...
If the battery will be stored for longer than a month, check the specific gravity of the fluid at least once a month and recharge the battery when it is low. NOTE: Consult a Yamaha dealer when charging or re-charging batteries. 1. Red cable 2. Black cable EMU30051 Connecting the battery 3.
5. Large black lead 6. Negative connecting cable 7. Power for accessories NOTE: If connecting an accessory battery, consult your Yamaha dealer about correct wiring. EMU29370 Disconnecting the battery Disconnect the BLACK cable from the NEGA- TIVE (-) terminal first. Then disconnect the RED cable from the POSITIVE (+) terminal.
Yamaha outboard motors. Therefore Q. Has fuel pump malfunctioned? some items may not apply to your model. A. Have serviced by a Yamaha dealer. If your outboard motor requires repair, bring it to your Yamaha dealer. Q. Are spark plug(s) fouled or of incorrect...
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A. Return to normal operating position. A. Fill tank with clean, fresh fuel. Q. Is carburetor clogged? Q. Is fuel filter clogged? A. Have serviced by a Yamaha dealer. A. Clean or replace filter. Q. Is fuel joint connection incorrect? Q. Have ignition parts failed? A.
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Q. Is fuel system obstructed? Q. Is water pump or thermostat faulty? A. Check for pinched or kinked fuel line or oth- A. Have serviced by a Yamaha dealer. er obstructions in fuel system. Q. Is there excess water in fuel filter cup? Q.
CAUTION: Q. Is steering pivot loose or damaged? If the boat is operated with one engine in A. Tighten or have serviced by a Yamaha the water but not running, water may run dealer. into the exhaust pipe due to wave action, causing engine trouble.
4. Main fuse (50 A) NOTE: 5. Main switch / trim switch fuse (20 A) Consult your Yamaha dealer if the new fuse 6. Engine control unit / ignition coil / electric immediately blows again. fuel pump / fuel injector / ISC (idle speed control) fuse (20 A) 7.
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 immediate- If you cannot immediately take the outboard motor to a Yamaha dealer, follow the proce- dure below in order to minimize engine dam- age.