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  4. 15F
  5. Owner's Manual

Yamaha 15F Owner's Manual

Summary of 15F

  • Page 1

    Read this manual carefully before operating this outboard motor. Owner’s manual 9.9f 15f 63v-28199-7e-e0 u63v7ee0.Book page 1 wednesday, november 20, 2013 2:31 pm.

  • Page 2

    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. U63v7ee0.Book page 1 wednesday, november 20, 2013 2:31 pm.

  • Page 3: Important Manual Information

    Important manual information emu25108 to the owner thank you for selecting a yamaha outboard motor. This owner’s manual contains infor- mation needed for proper operation, mainte- nance and care. A thorough understanding of these simple instructions will help you obtain maximum enjoyment from your n...

  • Page 4: Table Of Contents

    Table of contents safety information............................. 1 outboard motor safety.................... 1 propeller ............................................. 1 rotating parts..................................... 1 hot parts ............................................ 1 electric shock........

  • Page 5: Table of Contents

    Table of contents engine shut-off cord (lanyard) .......... 22 oil ..................................................... 23 engine .............................................. 23 install top cowling ............................ 23 filling fuel and engine oil............... 23 filling fuel for port...

  • Page 6: Safety Information

    1 safety information emu33623 outboard motor safety observe these precautions at all times. Emu36502 propeller people can be injured or killed if they come in contact with the propeller. The propeller can keep moving even when the motor is in neu- tral, and sharp edges of the propeller can cut even ...

  • Page 7: Safety Information

    Safety information 2 emu33901 carbon monoxide this product emits exhaust gases which con- tain carbon monoxide, a colorless, odorless gas which may cause brain damage or death when inhaled. Symptoms include nausea, dizziness, and drowsiness. Keep cockpit and cabin areas well ventilated. Avoid blocki...

  • Page 8: Safety Information

    Safety information 3 operate defensively at safe speeds and keep a safe distance away from people, objects, and other boats.  do not follow directly behind other boats or waterskiers.  avoid sharp turns or other maneuvers that make it hard for others to avoid you or un- derstand where you are goin...

  • Page 9: General Information

    General information 4 emu25172 identification numbers record emu25185 outboard motor serial number the outboard motor serial number is stamped on the label attached to the port side of the clamp bracket. Record your outboard motor serial number in the spaces provided to assist you in ordering spare ...

  • Page 10: General Information

    General information 5 emu33524 read manuals and labels before operating or working on this outboard motor:  read this manual.  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. Emu33833...

  • Page 11: General Information

    General information 6 emu33913 contents of labels the above warning labels mean as follows. 1 warning ewm01692 emergency starting does not have start- in-gear protection. Ensure shift control is in neutral before starting engine. 2 warning ewm01682  keep hands, hair, and clothing away from rotating...

  • Page 12: General Information

    General information 7 emu35133 symbols the following symbols mean as follows. Notice/warning read owner’s manual hazard caused by continuous rotation electrical hazard zmu05696 zmu05664 zmu05665 zmu05666 u63v7ee0.Book page 7 wednesday, november 20, 2013 2:31 pm.

  • Page 13

    Specifications and requirements 8 emu34522 specifications tip: “(al)” stated in the specification data below represents the numerical value for the alumi- num propeller installed. Likewise, “(sus)” represents the value for stainless steel propeller installed and “(pl)” for plastic propeller installe...

  • Page 14

    Specifications and requirements 9 recommended gear oil: yamalube outboard gear oil or hypoid gear oil recommended gear oil grade: sae 90 api gl-4 gear oil quantity: 0.250 l (0.264 us qt, 0.220 imp.Qt) tightening torque: spark plug: 25 nm (2.55 kgf-m, 18.4 ft-lb) propeller nut: 17 nm (1.73 kgf-m, 12....

  • Page 15

    Specifications and requirements 10 emu39192 start-in-gear protection yamaha outboard motors are equipped with start-in-gear protection device. This feature permits the engine to be started only when it is in neutral. Always select neutral before starting the engine. Emu25652 engine oil requirements ...

  • Page 16

    Specifications and requirements 11 bottom can be coated with an anti-fouling paint approved for your area to inhibit marine growth. Do not use anti-fouling paint which includes copper or graphite. These paints can cause more rapid engine corrosion. Emu40302 outboard motor disposal re- quirements nev...

  • Page 17: Components

    Components 12 emu2579z components diagram tip: * may not be exactly as shown; also may not be included as standard equipment on all models (order from dealer). Emu25804 fuel tank if your model was equipped with a portable fuel tank, its function is as follows. Warning ewm00021 the fuel tank supplied...

  • Page 18: Components

    Components 13 mercial users should conform to relevant licensing or approval authority regula- tions. Emu25831 fuel joint this joint is used to connect the fuel line. Emu25842 fuel gauge this gauge is located on either the fuel tank cap or on the fuel joint base. It shows the ap- proximate amount of...

  • Page 19: Components

    Components 14 emu25963 throttle indicator the fuel consumption curve on the throttle in- dicator shows the relative amount of fuel con- sumed for each throttle position. Choose the setting that offers the best performance and fuel economy for the desired operation. Emu25977 throttle friction adjuste...

  • Page 20: Components

    Components 15 emu26004 engine stop button the engine stop button stops the engine when the button is pushed. Emu26031 choke knob to supply the engine with the rich fuel mix- ture required to start, pull out this knob. The choke knob has the 4 operating positions shown in the following illustration. ...

  • Page 21: Components

    Components 16 to increase resistance, turn the adjuster clockwise. To decrease resistance, turn the adjuster counterclockwise. Warning ewm00041 do not overtighten the friction adjuster. If there is too much resistance, it could be difficult to steer, which could result in an accident. Emu26263 trim ...

  • Page 22: Components

    Components 17 it fits properly in the rubber seal. Then lock the cowling again by returning the cowling lock lever(s) to the lock position. Emu26411 2-pin connector ac 12 v-40/60/80w power is delivered through this connector. When using it, keep in mind the following points:  use a genuine yamaha c...

  • Page 23: Installation

    Installation 18 emu26903 installation the information presented in this section is intended as reference only. It is not possible to provide complete instructions for every possible boat and motor combination. Proper mounting depends in part on experience and the specific boat and motor combination....

  • Page 24: Installation

    Installation 19 notice ecm01635  make sure that the idle hole is high enough to prevent water from entering the engine even if the boat is stationary with the maximum load.  incorrect engine height or obstructions to the smooth flow of water (such as the design or condition of the boat, or ac- ces...

  • Page 25: Installation

    Installation 20 packaging. If used, they must be of at least the same quality of material and strength and must be tightened se- curely. After tightening, test run the engine and check their tightness. [ewm00652] u63v7ee0.Book page 20 wednesday, november 20, 2013 2:31 pm.

  • Page 26: Operation

    Operation 21 emu36382 first-time operation emu30175 breaking in engine your new engine requires a period of break- in to allow mating surfaces of moving parts to wear in evenly. Correct break-in will help en- sure proper performance and longer engine life. Notice: failure to follow the break-in proc...

  • Page 27: Operation

    Operation 22 as an emergency reserve. With the boat level on a trailer or in the water, check the fuel lev- el. For fuel filling instructions, see page 23. Emu36573 remove the top cowling for the following checks, remove the top cowling from the bottom cowling. To remove the top cowling, release the...

  • Page 28: Operation

    Operation 23 emu27121 oil  check to be sure you have plenty of oil for your trip. Emu27142 engine  check the engine and engine mounting.  look for loose or damaged fasteners.  check the propeller for damage. Emu36956 install top cowling 1. Be sure that the cowling lock lever is re- leased. 2. Be...

  • Page 29: Operation

    Operation 24 wash with soap and water. If gasoline spills on your clothing, change your clothes. 1. Be sure the engine is stopped. 2. Disconnect the fuel line from the fuel tank and tighten the air vent screw on the fuel tank cap. 3. Remove the portable tank from the boat. 4. Be sure you are in a we...

  • Page 30: Operation

    Operation 25 if equipped with a portable fuel tank 1. Pour oil into the portable fuel tank, and then add gasoline. 2. Replace the fuel tank cap and close tightly. 3. Shake the fuel tank to mix the fuel thor- oughly. 4. Make sure that the oil and gasoline are mixed. If equipped with a built-in fuel t...

  • Page 31: Operation

    Operation 26 toms include nausea, dizziness, and drowsiness. Keep cockpit and cabin ar- eas well ventilated. Avoid blocking ex- haust outlets. Emu27469 sending fuel (portable tank) 1. If there is an air vent screw on the fuel tank cap, loosen it 2 or 3 turns. 2. If there is a fuel joint on the motor...

  • Page 32: Operation

    Operation 27 emu27533 manual start models warning ewm01841  failure to attached engine shut-off cord could result in a runaway boat if opera- tor is ejected. Attach the engine shut-off cord to a secure place on your clothing, or your arm or leg while operating. Do not attach the cord to clothing th...

  • Page 33: Operation

    Operation 28  if the choke knob is left in the pulled out po- sition while the engine is running, the en- gine will run poorly or stall. 5. Pull the manual starter handle slowly un- til you feel resistance. Then give a strong pull straight out to crank and start the en- gine. Repeat if necessary. 6...

  • Page 34: Operation

    Operation 29 emu36972 stop switches perform the following procedure to check that the engine stop switch and engine shut- off switch operate properly.  start the engine, and then check that the engine stops when the engine stop button is pushed.  restart the engine, and then check that the engine ...

  • Page 35: Operation

    Operation 30 emu31743 stopping boat warning ewm01511  do not use the reverse function to slow down or stop the boat as it could cause you to lose control, be ejected, or im- pact the steering wheel or other parts of the boat. This could increase the risk of serious injury. It could also damage the ...

  • Page 36: Operation

    Operation 31 emu27863 trimming outboard motor warning ewm00741 excessive trim for the operating condi- tions (either trim up or trim down) can cau- se boat instability and can make steering the boat more difficult. This increases the possibility of an accident. If the boat be- gins to feel unstable ...

  • Page 37: Operation

    Operation 32 tip: the outboard motor trim angle can be changed approximately 4 degrees by shifting the trim rod one hole. Emu27913 adjusting boat trim when the boat is on plane, a bow-up attitude results in less drag, greater stability and effi- ciency. This is generally when the keel line of the bo...

  • Page 38: Operation

    Operation 33 warning ewm00223 make sure that no one is near the out- board motor when tilting the outboard motor up or down. Otherwise, body parts could be crushed between the outboard motor and the clamp bracket. Warning ewm00251 leaking fuel is a fire hazard. If there is a fuel joint on the outboa...

  • Page 39: Operation

    Operation 34 emu28023 procedure for tilting down (manual tilt models) 1. Place the tilt lock lever in the re- lease/down position or return the shallow water lever to its original position. 2. Slightly tilt the engine up until the tilt sup- port bar is automatically released. 3. Slowly tilt the engi...

  • Page 40: Operation

    Operation 35 3. Slightly tilt the outboard motor up. The tilt support bar will lock automatically, sup- porting the outboard motor in a partially raised position. This outboard motor has 2 positions for shallow water cruising. 4. To return the outboard motor to the nor- mal running position, place t...

  • Page 41: Maintenance

    Maintenance 36 emu2822b transporting and storing out- board motor warning ewm02621  use care when transporting fuel tank, whether in a boat or car.  do not fill fuel container to maximum capacity. Gasoline will expand consider- ably as it warms up and can build up pressure in the fuel container. T...

  • Page 42: Maintenance

    Maintenance 37 tip: place a towel or something similar under the outboard motor to protect it from damage. Emu30273 storing outboard motor when storing your yamaha outboard motor for prolonged periods of time (2 months or longer), several important procedures must be performed to prevent excessive d...

  • Page 43: Maintenance

    Maintenance 38 8. Remove the outboard motor from the test tank. 9. Install the silencer cover/cap of fogging hole and top cowling. 10. If the “fogging oil” is not available, run the engine at a fast idle until the fuel sys- tem becomes empty and the engine stops. 11. Drain the cooling water complete...

  • Page 44: Maintenance

    Maintenance 39  turn off the engine and keep engine shut-off cord (lanyard) with you when you perform maintenance unless other- wise specified.  allow the engine to cool before handling hot parts or fluids.  always completely reassemble the mo- tor before operation. Emu28512 replacement parts if ...

  • Page 45: Maintenance

    Maintenance 40 emu34448 maintenance chart 1 tip:  refer to the sections in this chapter for explanations of each owner-specific action.  the maintenance cycle on these charts assume usage of 100 hours per year and regular flushing of the cooling water passages. Maintenance frequency should be adju...

  • Page 46: Maintenance

    Maintenance 41 emu34452 maintenance chart 2 greasing points greasing impeller/water pump housing inspection or replace- ment as necessary impeller/water pump housing replacement propeller/propeller nut/cotter pin inspection or replace- ment as necessary shift link/shift cable inspection, adjust- men...

  • Page 47: Maintenance

    Maintenance 42 emu28944 greasing yamaha grease a (water resistant grease) yamaha grease d (corrosion resistant grease; for propeller shaft) u63v7ee0.Book page 42 wednesday, november 20, 2013 2:31 pm.

  • Page 48: Maintenance

    Maintenance 43 emu44491 cleaning and adjusting spark plug the spark plug is an important engine com- ponent and is easy to inspect. The condition of the spark plug can indicate something about the condition of the engine. For exam- ple, if the center electrode porcelain is very white, this could ind...

  • Page 49: Maintenance

    Maintenance 44  keep hands, hair, and clothes away from the flywheel and other rotating parts while the engine is running. Notice ecm00491 this procedure must be performed while the outboard motor is in the water. A flush- ing attachment or test tank can be used. If the boat is not equipped with a ...

  • Page 50: Maintenance

    Maintenance 45  check the propeller shaft oil seal for dam- age. Emu30663 removing propeller emu29198 spline models 1. Straighten the cotter pin and pull it out using a pair of pliers. 2. Remove the propeller nut, washer, and spacer (if equipped). Warning! Do not use your hand to hold the propeller...

  • Page 51: Maintenance

    Maintenance 46 tip: if the propeller nut does not align with the propeller shaft hole after tightening to the specified torque, tighten the nut further to align it with the hole. Emu2928c changing gear oil warning ewm00801  be sure the outboard motor is securely fastened to the transom or a stable ...

  • Page 52: Maintenance

    Maintenance 47 6. Put a new gasket on the oil level plug. When the oil begins to flow out of the oil level plug hole, insert and tighten the oil level plug. 7. Put a new gasket on the gear oil drain screw. Insert and tighten the gear oil drain screw. Emu29304 cleaning fuel tank warning ewm00921 gaso...

  • Page 53: Maintenance

    Maintenance 48 emu29317 inspecting and replacing anode(s) yamaha outboard motors are protected from corrosion by sacrificial anodes. Inspect the external anodes periodically. Remove scales from the surfaces of the anodes. Consult a yamaha dealer for replacement of external anodes. Notice ecm00721 do...

  • Page 54: Trouble Recovery

    Trouble recovery 49 emu29428 troubleshooting a problem in the fuel, compression, or igni- tion systems can cause poor starting, loss of power, or other problems. This section de- scribes basic checks and possible remedies, and covers all yamaha outboard motors. Therefore some items may not apply to ...

  • Page 55: Trouble Recovery

    Trouble recovery 50 q. Is fuel system obstructed? A. Check for pinched or kinked fuel line or other obstructions in fuel system. Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel. Q. Is fuel filter clogged? A. Clean or replace filter. Q. Have ignition parts failed? A. Have servic...

  • Page 56: Trouble Recovery

    Trouble recovery 51 a. Have serviced by a yamaha dealer. Q. Is load on boat improperly distributed? A. Distribute load to place boat on an even plane. Q. Is water pump or thermostat faulty? A. Have serviced by a yamaha dealer. Q. Is there excess water in fuel filter cup? A. Drain filter cup. Engine ...

  • Page 57: Trouble Recovery

    Trouble recovery 52 a. Have serviced by a yamaha dealer. Q. Is fuel joint connection incorrect? A. Connect correctly. Q. Is heat range of spark plug incorrect? A. Inspect spark plug and replace it with rec- ommended type. Q. Is high pressure fuel pump drive belt bro- ken? A. Have serviced by a yamah...

  • Page 58: Trouble Recovery

    Trouble recovery 53 warning ewm02362  use this procedure only for emergency engine starting to return to the nearest port for repairs.  when the emergency starter rope is used to start the engine, the start-in- gear protection device does not oper- ate. Make sure that the shift lever is in the neu...

  • Page 59: Trouble Recovery

    Trouble recovery 54 emu33502 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. Notice: do not attempt to run the outboard motor until it has been com- pletely inspected. [ecm00402] u63v7...

  • Page 60: Index

    55 index 2-pin connector .................................... 17 a alcohol and drugs................................... 2 anode(s), inspecting and replacing ...... 48 anti-fouling paint .................................. 10 avoid collisions....................................... 2 b battery charging...

  • Page 61: Index

    Index 56 o operating engine .................................. 25 outboard motor disposal requirements ...................................... 11 outboard motor (painted surface), checking ............................................. 38 outboard motor safety ........................... 1 outboard mo...

  • Page 62

    Printed on recycled paper printed in japan december 2013–0.2 × 1 cr u63v7ee0.Book page 1 wednesday, november 20, 2013 2:31 pm.