2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 100Get this manual
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Section 02 ENGINE Subsection 08 (COOLING SYSTEM )
Adjust mixture as necessaryReinsta ll removed parts
If pressure drops, check all hoses and engine for coolant leaksSpray soapwater solutio