2005 Ski-Doo REV Series Shop Manual, Page 36Get this manual

2005 Ski-Doo REV Series Shop Manual, Page 36

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Section 02 TROUBLESHOOTING Subsection 01 (ENGINE)
NORMAL USE4 Melted andor perforated piston dome; melted section at ring end gapaWhen piston reaches TDC, mixture is ignited by heated areas in c