2004 Ski-Doo REV Series Factory Service Manual, Page 95Get this manual

2004 Ski-Doo REV Series Factory Service Manual, Page 95

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Section 03 TROUBLESHOOTING Subsection 04 (ELECTRICAL SYSTEM)
SYMPTOM

SPARK PLUG TIP IS LIGHT GRAY
CONDITION
TESTINSPECTION

NORMAL USE 1 Refer to ENGINE SLOW