Yamaha F 15 Owners Manual

 
Trouble Recovery 
75 
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 serviced by a Yamaha dealer.
Q. Has warning system activated?
A. Find and correct cause of warning.
Q. Is spark plug gap incorrect?
A. Inspect and adjust as specified.
Q. Is ignition wiring damaged or poorly...

 
Trouble Recovery 
76 
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 power loss. 
Q. Is propeller damaged?
A. Have propeller repaired or replaced.
Q. Is propeller pitch or diameter incorrect?
A. Install correct propeller to operate out-
board at its recommended speed...

 
Trouble Recovery 
77 
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 Yamaha dealer.
Q. Is engine not responding properly to shift
lever position?
A. Have serviced by a Yamaha dealer. 
Engine vibrates excessively. 
Q. Is propeller damaged?
A. Have propeller repaired or replaced.
Q. Is propeller shaft damaged?
A....

 
Trouble Recovery 
78
NOTE:
 
Consult your Yamaha dealer if the new fuse 
immediately blows again. 
EMU29522 
Power trim and tilt / power tilt will not 
operate 
If the engine cannot be tilted up or down with
the power trim and tilt / the power tilt because
of a discharged battery or a failure with the
power trim and tilt unit / the power tilt unit, the
engine can be tilted manually.
1. Loosen the manual valve screw by turn-
ing it counterclockwise until it stops.
2. Put the engine in the desired...

 
Trouble Recovery 
79 
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. You could get an 
electrical shock. 
EMU29602 
Emergency starting engine 
1. Remove the top cowling.
2. Remove the cable by pulling out it from
the starter, if the cable is equipped.
3. Remove both ends of the choke link rod.
4. Remove the...

 
Trouble Recovery 
80 
7. Insert the knotted end of the emergency
starter rope into the notch in the flywheel
rotor and wind the rope around the fly-
wheel several turns clockwise.
8. Pull the rope slowly until resistance is
felt.
9. Give a strong pull straight out to crank
and start the engine. Repeat if neces-
sary. 
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...

 
81 
Consumer information 
EMU29811 
Important warranty information for U.S.A. and Canada 

 
Consumer information 
82 

 
Consumer information 
83 
EMU29830 
YAMAHA MOTOR CORPORATION, U.S.A.
 FOUR-STROKE OUTBOARD MOTOR
 THREE-YEAR LIMITED WARRANTY 

 
Consumer information 
84