Yamaha F150 Four Stroke Manual

Trouble Recovery
64
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 outboard
at its recommended speed (r/min) range.
Q. Is trim angle incorrect?
A....

Trouble Recovery
65
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. Have serviced by a Yamaha dealer.
Q. Are weeds...

Trouble Recovery
66
EMU29471Replacing fuse
If a fuse has blown, remove the electrical cov-
er, open the fuse holder and remove the fuse
with a fuse puller (if equipped). Replace it with
a spare one of the proper amperage.
WARNING
EWM00630
Be sure to use the specified fuse. An in-
correct fuse or a piece of wire could allow
excessive current flow. This could cause
electric system damage and a fire hazard.
NOTE:
Consult your Yamaha dealer if the new fuse
immediately blows again.
EMU29522Power trim and tilt...

Trouble Recovery
67
2. Put the engine in the desired position,
then tighten the manual valve screw by
turning it clockwise.
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-
ly.
If you cannot immediately take the outboard
motor to a Yamaha dealer, follow the proce-
dure below in order to minimize engine dam-
age.
EMU29970Procedure
1. Thoroughly wash away mud, salt, sea-
weed, and so on,...

Consumer information
68
EMU29811
Important warranty information for U.S.A. and Canada
U63P14E0.book  Page 68  Monday, June 6, 2005  4:57 PM 

Consumer information
69
U63P14E0.book  Page 69  Monday, June 6, 2005  4:57 PM 

Consumer information
70
EMU29830
YAMAHA MOTOR CORPORATION, U.S.A.
 FOUR-STROKE OUTBOARD MOTOR
 THREE-YEAR LIMITED WARRANTY
U63P14E0.book  Page 70  Monday, June 6, 2005  4:57 PM 

Consumer information
71
U63P14E0.book  Page 71  Monday, June 6, 2005  4:57 PM 

Consumer information
72
EMU29841
IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR 
YAMAHA OUTSIDE THE USA OR CANADA
U63P14E0.book  Page 72  Monday, June 6, 2005  4:57 PM 

May 2005–4.3 × 1 CR Printed in Japan
Printed on recycled paper
YAMAHA MOTOR CORPORATION, USA