Publicité
EMU01202
CLEANING AND ADJUSTING SPARK
PLUG
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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 com-
ponent and is easy to inspect. The condition
of the spark plug can indicate something
about the condition of the engine. For exam-
ple, 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 diagnose any problems yourself.
Instead, take the outboard motor to a Yama-
ha dealer. You should periodically remove
and inspect the spark plug because heat and
deposits will cause the spark plug to slowly
break down and erode. If electrode erosion
becomes excessive, or if carbon and other
deposits are excessive, you should replace
the spark plug with another of the correct
type.
Standard spark plug:
Refer to "SPECIFICATIONS", page 4-1.
Before fitting the spark plug, measure the
electrode gap with a wire thickness gauge;
adjust the gap to specification if necessary.
Spark plug gap:
Refer to "SPECIFICATIONS", page 4-1.
4-12
GB
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