8-9
8
EBU23211
Checking the spark plug
The spark plug is an important engine component,
which is easy to check. Since heat and deposits
will cause any spark plug to slowly erode, the spark
plug should be removed and checked in accor-
dance with the periodic maintenance and lubrica-
tion chart. In addition, the condition of the spark
plug can reveal the condition of the engine.
To remove the spark plug
1. Remove the spark plug cap.
2. Remove the spark plug as shown, with the
spark plug wrench included in the owner’s tool
kit.
To check the spark plug
1. Check that the porcelain insulator around the
center electrode of the spark plug is a medi-
um-to-light tan (the ideal color when the ATV
is ridden normally).
NOTE:
If the spark plug shows a distinctly different color,
the engine could be operating improperly. Do not
attempt to diagnose such problems yourself. In-
stead, have a Yamaha dealer check the ATV.
1. Spark plug cap
1. Spark plug wrench
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Страница 2: ...EBU17091 U5UH15E0 book Page 1 Thursday April 5 2007 9 49 AM ...
Страница 14: ...2 EBU17660 LOCATION OF THE WARNING AND SPECIFICATION LABELS U5UH15E0 book Page 1 Thursday April 5 2007 9 49 AM ...
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Страница 54: ...7 EBU21131 RIDING YOUR ATV U5UH15E0 book Page 1 Thursday April 5 2007 9 49 AM ...
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