Cleaning And Adjusting Spark; Plug - Yamaha F15C Owner's Manual

Maintenance
F20ER, F20PR
EMU28953
Cleaning and adjusting spark plug
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WARNING
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
60
fire.
EWM01550
WARNING
The engine will still be very hot when it
has just been turned off. Take extremely
care so that neither you nor anyone else
gets burnt. To avoid burns, work on the
engine when it has cooled down.
The spark plug is an important engine com-
ponent and is easy to inspect. The condition
ZMU05595