2005 Ski-Doo REV Series Shop Manual, Page 42Get this manual

2005 Ski-Doo REV Series Shop Manual, Page 42

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Section 02 TROUBLESHOOTING Subsection 01 (ENGINE)
NORMAL USELiquid-Cooled Engines (cont'd)

11 Check ignition timingaIgnition timing is too advancedAdjust according to specifications