- DL manuals
- Yamaha
- Outboard Motor
- 15F
- 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-28199-2b-e0 u63v2be0.Book page 1 thursday, march 6, 2008 10:33 am.
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. U63v2be0.Book page 1 thursday, march 6, 2008 10:33 am.
Page 3
Important manual information emu25105 to the owner thank you for choosing 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 ne...
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) .......... 23 oil ..................................................... 24 engine .............................................. 24 install cowling ................................... 24 filling fuel and engine oil............... 24 filling fuel for p...
Page 6: Safety Information
1 safety information emu33622 outboard motor safety observe these precautions at all times. Emu36500 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 emu33780 modifications do not attempt to modify this outboard motor. Modifications to your outboard motor may re- duce safety and reliability, and render the out- board unsafe or illegal to use. Emu33740 boating safety this section includes a few of the many im- portant safety p...
Page 8: Safety Information
Safety information 3 ● avoid sharp turns or other maneuvers that make it hard for others to avoid you or un- derstand where you are going. ● avoid areas with submerged objects or shallow water. ● ride within your limits and avoid aggressive maneuvers to reduce the risk of loss of con- trol, ejection...
Page 9: General Information
General information 4 emu25171 identification numbers record emu25183 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 emu33520 read manuals and labels before operating or working on this 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. Emu33831 warning ...
Page 11: General Information
General information 6 emu33912 contents of labels the above warning labels mean as follows. 1 warning ewm01691 emergency starting does not have start- in-gear protection. Ensure shift control is in neutral before starting engine. 2 warning ewm01681 ● keep hands, hair, and clothing away from rotating...
Page 12: General Information
General information 7 emu33843 symbols the following symbols mean as follows. Notice/warning read owner’s manual hazard caused by continuous rotation electrical hazard remote control lever/gear shift lever operat- ing direction, dual direction engine start/ engine cranking zmu05696 zmu05664 zmu05665...
Page 13
Specifications and requirements 8 emu31480 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: hypoid gear oil sae#90 gear oil quantity: 0.250 l (0.264 us qt, 0.220 imp.Qt) tightening torque for engine: spark plug: 25.0 nm (2.55 kgf-m, 18.4 ft-lb) propeller nut: 17.0 nm (1.73 kgf-m, 12.5 ft-lb) emu33553 installation requirements emu33563...
Page 15
Specifications and requirements 10 emu25770 start-in-gear protection yamaha outboard motors or yamaha-ap- proved remote control units are equipped with start-in-gear protection device(s). This feature permits the engine to be started only when it is in neutral. Always select neutral before starting ...
Page 16
Specifications and requirements 11 emu36340 motor disposal requirements never illegally discard (dump) the motor yamaha recommends consulting the dealer about discarding the motor. Emu36351 emergency equipment keep the following items onboard in case there is trouble with the motor. ● a tool kit wit...
Page 17
Specifications and requirements 12 u63v2be0.Book page 12 thursday, march 6, 2008 10:33 am.
Page 18: Components
Components 13 emu2579h components diagram tip: * may not be exactly as shown; also may not be included as standard equipment on all models. 9.9f, 15f emu25802 fuel tank if your model was equipped with a portable fuel tank, its function is as follows. Warning ewm00020 the fuel tank supplied with this...
Page 19: Components
Components 14 mercial users should conform to relevant licensing or approval authority regula- tions. Emu25830 fuel joint this joint is used to connect the fuel line. Emu25841 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 20: Components
Components 15 emu25941 throttle grip the throttle grip is on the tiller handle. Turn the grip counterclockwise to increase speed and clockwise to decrease speed. Emu25961 throttle indicator the fuel consumption curve on the throttle in- dicator shows the relative amount of fuel con- sumed for each t...
Page 21: Components
Components 16 emu26001 engine stop button to open the ignition circuit and stop the en- gine, push this button. Emu26030 choke knob to supply the engine with the rich fuel mixture required to start, pull out this knob. The choke knob has the 4 operating positions shown in the following illustration....
Page 22: Components
Components 17 to increase resistance, turn the adjuster clockwise. To decrease resistance, turn the adjuster counterclockwise. Warning ewm00040 do not overtighten the friction adjuster. If there is too much resistance, it could be difficult to steer, which could result in an accident. Emu26261 trim ...
Page 23: Components
Components 18 emu26372 top cowling lock lever(s) (turn type) to remove the engine top cowling, turn the lock lever(s) and lift off the cowling. When in- stalling the cowling, check to be sure it fits properly in the rubber seal. Then lock the cowling again by returning the lever(s) to the lock posit...
Page 24: Installation
Installation 19 emu26902 installation the information presented in this section is in- tended as reference only. It is not possible to provide complete instructions for every possi- ble boat and motor combination. Proper mounting depends in part on experience and the specific boat and motor combinat...
Page 25: Installation
Installation 20 notice ecm01630 ● during water testing, check the buoyan- cy of the boat, at rest, with its maximum load. Check that the static water level on the exhaust housing is low enough to prevent water entry into the power head when water rises due to waves when the outboard is not running. ...
Page 26: Installation
Installation 21 your yamaha dealer. Warning! Avoid using bolts, nuts or washers other than those contained in the engine 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 tigh...
Page 27: Operation
Operation 22 emu36380 first-time operation emu30174 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 proce...
Page 28: Operation
Operation 23 an emergency reserve. With the boat level on a trailer or in the water, check the fuel level. For fuel filling instructions, see page 24. Emu36570 remove cowling for the following checks, remove the top cowling from the engine. To remove the en- gine top cowling, release the lock lever ...
Page 29: Operation
Operation 24 emu27120 oil ● check to be sure you have plenty of oil for your trip. Emu27140 engine ● check the engine and engine mounting. ● look for loose or damaged fasteners. ● check the propeller for damage. Emu36952 install cowling 1. Be sure that a cowling lock lever is re- leased. 2. Be sure ...
Page 30: Operation
Operation 25 skin, wash with soap and water. If gaso- line spills on your clothing, change your clothes. 1. Stop the engine. 2. Remove the portable tank from the boat. 3. Be sure you are in a well-ventilated out- door area, either securely moored or trail- ered. 4. Do not smoke and keep away from sp...
Page 31: Operation
Operation 26 2. Replace the fuel tank cap and close tight- ly. 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 tank 1. Pour oil into a clean fuel can, and then add gasoline. 2. Replace the fuel can cap and close ...
Page 32: Operation
Operation 27 2. If there is a fuel joint on the motor, firmly connect the fuel line to the joint. Then firmly connect the other end of the fuel line to the joint on the fuel tank. 3. Squeeze the primer pump, with the arrow pointing up, until you feel it become firm. During engine operation place the...
Page 33: Operation
Operation 28 tip: the start-in-gear protection device prevents the engine from starting except when in neu- tral. 2. Attach the engine shut-off cord to a se- cure place on your clothing, or your arm or leg. Then install the clip on the other end of the cord into the engine shut-off switch. 3. Place ...
Page 34: Operation
Operation 29 tip: ● when the engine is cold, it needs to be warmed up. For further information, see page 29. ● if the engine does not start on the first try, repeat the procedure. If the engine fails to start after 4 or 5 tries, open the throttle a small amount (between 1/8 and 1/4) and try again. A...
Page 35: Operation
Operation 30 emu34550 shifting warning ewm00180 before shifting, make sure there are no swimmers or obstacles in the water near you. Notice ecm01610 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 ...
Page 36: Operation
Operation 31 emu31742 stopping boat warning ewm01510 ● do not use the reverse function to slow down or stop the boat as it could cause you to lose control, be ejected, or impact the steering wheel or other parts of the boat. This could increase the risk of se- rious injury. It could also damage the ...
Page 37: Operation
Operation 32 the possibility of an accident. If the boat begins to feel unstable or is hard to steer, slow down and/or readjust the trim angle. The trim angle of the outboard motor helps determine the position of the bow of the boat in the water. Correct trim angle will help im- prove performance an...
Page 38: Operation
Operation 33 cy to steer to one side or the other. Compen- sate for this as you steer. The trim tab can also be adjusted to help offset this effect. When the bow of the boat is down, it is easier to accelerate from a standing start onto plane. Bow up too much trim-out puts the bow of the boat too hi...
Page 39: Operation
Operation 34 notice ecm00241 ● before tilting the outboard motor, stop the engine by following the procedure on page 31. Never tilt the outboard mo- tor while the engine is running. Severe damage from overheating can result. ● do not tilt up the engine by pushing the tiller handle (if equipped) beca...
Page 40: Operation
Operation 35 emu28061 shallow water emu28073 cruising in shallow water (manual tilt models) warning ewm01781 ● run the boat at the lowest possible speed when using the shallow water cruising system. The tilt lock mecha- nism does not work while the shallow water cruising system is being used. Hit- t...
Page 41: Operation
Operation 36 5. Place the tilt lock lever in the lock/down position, then slightly tilt the outboard mo- tor up until the tilt support bar automati- cally returns to the free position. 6. Slowly lower the outboard motor to the normal position. Emu28194 cruising in other conditions cruising in salt w...
Page 42: Maintenance
Maintenance 37 emu28226 transporting and storing out- board motor warning ewm00692 ● 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 43: Maintenance
Maintenance 38 notice ecm01411 ● do not place the outboard motor on its side before the cooling water has drained from it completely, otherwise water may enter the cylinder through the exhaust port and cause engine trouble. ● store the outboard motor in a dry, well- ventilated place, not in direct s...
Page 44: Maintenance
Maintenance 39 11. Drain the cooling water completely out of the motor. Clean the body thoroughly. 12. If the “fogging oil” is not available, re- move the spark plug(s). Pour a teaspoon- ful of clean engine oil into each cylinder. Crank several times manually. Replace the spark plug(s). 13. Drain th...
Page 45: Maintenance
Maintenance 40 ● always completely reassemble the mo- tor before operation. Maintenance, replacement, or repair of the emission control devices and systems on models affixed with an emission control label may be performed by any marine en- gine repair establishment or individual. All warranty repair...
Page 46: Maintenance
Maintenance 41 emu34445 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 47: Maintenance
Maintenance 42 emu34451 maintenance chart 2 fuel pump inspection or replace- ment as necessary fuel/oil leakage inspection gear oil replacement greasing points greasing impeller/water pump housing inspection or replace- ment as necessary impeller/water pump housing replacement propeller/propeller nu...
Page 48: Maintenance
Maintenance 43 emu28941 greasing yamaha grease a (water resistant grease) yamaha grease d (corrosion resistant grease; for propeller shaft) 9.9f, 15f u63v2be0.Book page 43 thursday, march 6, 2008 10:33 am.
Page 49: Maintenance
Maintenance 44 emu28955 cleaning and adjusting spark plug the spark plug is an important engine compo- nent and is easy to inspect. The condition of the spark plug can indicate something about the condition of the engine. For example, if the center electrode porcelain is very white, this could indic...
Page 50: Maintenance
Maintenance 45 ● keep hands, hair, and clothes away from the flywheel and other rotating parts while the engine is running. Notice ecm00490 this procedure must be performed while the outboard motor is in the water. A flush- ing attachment or test tank can be used. A diagnostic tachometer should be u...
Page 51: Maintenance
Maintenance 46 ● check each of the propeller blades for wear, erosion from cavitation or ventilation, or other damage. ● check the propeller shaft for damage. ● check the splines for wear or damage. ● check for fish line tangled around the pro- peller shaft. ● check the propeller shaft oil seal for ...
Page 52: Maintenance
Maintenance 47 tip: if the propeller nut does not align with the pro- peller shaft hole after tightening to the speci- fied torque, tighten the nut further to align it with the hole. Emu29287 changing gear oil warning ewm00800 ● be sure the outboard motor is securely fastened to the transom or a sta...
Page 53: Maintenance
Maintenance 48 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. Emu29302 cleaning fuel tank warning ewm00920 gaso...
Page 54: Maintenance
Maintenance 49 4. Clean the filter (located on the end of the suction pipe) in a suitable cleaning sol- vent. Allow the filter to dry. 5. Replace the gasket with a new one. Re- install the fuel joint assembly and tighten the screws firmly. Emu29312 inspecting and replacing anode(s) yamaha outboard m...
Page 55: Trouble Recovery
Trouble recovery 50 emu29427 troubleshooting a problem in the fuel, compression, or ignition systems can cause poor starting, loss of pow- er, or other problems. This section describes basic checks and possible remedies, and cov- ers all yamaha outboard motors. Therefore some items may not apply to ...
Page 56: Trouble Recovery
Trouble recovery 51 a. Check for pinched or kinked fuel line or oth- er 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 serviced by a yamaha dealer. Q. Ha...
Page 57: Trouble Recovery
Trouble recovery 52 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 power loss. Q. Is propeller damaged? ...
Page 58: Trouble Recovery
Trouble recovery 53 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 yamaha dealer. Q. Is engine not responding properly to shift lever position? A. H...
Page 59: Trouble Recovery
Trouble recovery 54 ● do not attach the cord to clothing that could tear loose. Do not route the cord where it could become entangled, pre- venting it from functioning. ● avoid accidentally pulling the cord dur- ing normal operation. Loss of engine power means the loss of most steering control. Also...
Page 60: Trouble Recovery
Trouble recovery 55 emu33501 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- ly. Notice: do not attempt to run the out- board motor until it has been completely inspected. [ecm00401] u63v2...
Page 61
U63v2be0.Book page 56 thursday, march 6, 2008 10:33 am.
Page 62
Yamaha motor co., ltd. Printed on recycled paper printed in japan march 2008–1.0 × 1 cr u63v2be0.Book page 1 thursday, march 6, 2008 10:33 am.