Yamaha F25 - Manual (Page 41)

Maintenance
36
EMU28874
Maintenance chart (additional)
EMU28931
Greasing
Yamaha marine grease (Water resistant grease)
EMU28952
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
Item Actions
Every
500 hours (2.5 years) 1000 hours (5 years)
Exhaust guide, exhaust
manifold Inspection / replace-
ment
U69M15E0.book Page 36 Wednesday, April 5, 2006 4:48 PM