1997 Ski-Doo Factory Shop Manual Volume Two, Page 22Get this manual

1997 Ski-Doo Factory Shop Manual Volume Two, Page 22

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Section 02 TROUBLESHOOTING Sub-Section 02 (ENGINE)
SYMPTOM CONDITION TestInspection ENGINE BACKFIRES NORMAL USE 1 Check spark plug(s)a.Carbon accumulation caused by defective spark plug(s)Clean