Spark Plug Inspection - Yamaha Raptor YFM350S Ower's Manual

EBU14550

Spark plug inspection

Removal
1. Remove the spark plug cap.
1. Spark plug cap
2. Use the spark plug wrench in the owner's
tool kit to remove the spark plug as
shown.
1. Spark plug wrench
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.
The ideal color on the white insulator around
the center electrode is a medium-to-light tan
color for an ATV that is being ridden normally.
Do not attempt to diagnose such problems
yourself.
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