8-25
EBU01182
Spark plug inspection
The spark plug is an important engine component
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 porce-
lain color could indicate an intake air leak or carbu-
retion problem for that cylinder. Do not attempt to
diagnose such problems yourself.
Instead, take the ATV 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 elec-
trode erosion becomes excessive, you should re-
place the spark plug with one of the proper type.
Standard spark plug:
DR8EA (NGK)
U5NF63.book Page 25 Wednesday, March 12, 2003 10:06 AM
Summary of Contents for WARRIOR YFM350XS
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Page 166: ...7 1 3 Riding Your ATV U5NF63 book Page 1 Wednesday March 12 2003 10 06 AM ...
Page 167: ...7 2 7 Conduite du VTT Conducción del ATV U5NF63 book Page 2 Wednesday March 12 2003 10 06 AM ...
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