2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 709Get this manual
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Section 02 ENGINE Subsection 01 (ENGINE REMOVAL AND INSTALLATION)
3.3 RH rear engine rubber mount screw1 Boll 2 Small fla washer 3 Large flal washer With Teflon 4 Nut
4 Tight