Maintenance
48
EMU28930
Greasing
Yamaha marine grease (Water resistant grease)
EMU28950
Cleaning and adjusting spark plug
WARNING
EWM00560
When removing or installing a spark plug,
be careful not to damage the insulator. A
damaged insulator could allow external
sparks, which could lead to explosion or
fire.
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 indicate an intake air leak or carburetion
problem in that cylinder. Do not attempt to di-
agnose any problems yourself. Instead, take
the outboard motor to a Yamaha dealer. You
should periodically remove and inspect the
63P10.book Page 48 Tuesday, May 13, 2003 10:23 AM
Summary of Contents for F150C
Page 1: ...F150C ...
Page 2: ...ZMU01690 Read this owner s manual carefully before operating your outboard motor ...
Page 73: ...Consumer information 67 EMU29810 Important warranty information for U S A and Canada ...
Page 74: ...Consumer information 68 ...
Page 76: ...Consumer information 70 ...
Page 78: ......