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EBU00286
Spark plug inspection
The spark plug is an important engine compo-
nent and is easy to inspect. The condition of
the spark plug can indicate the condition of the
engine.
For example, a very white center electrode por-
celain color could indicate an intake air leak or
carburetion problem for that cylinder. Do not
attempt to diagnose such problems yourself.
Instead, take the machine to a Yamaha 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,
you should replace the spark plug with one of
the proper type.
Standard spark plug:
DPR8EA-9 (NGK)
8-41
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