2005 Ski-Doo Racing Handbook, Page 391Get this manual
SECTION 082005 MX 550 AND 380 FC
CAUTION: When installing rewind starter, ensure that oil pump shaft is properly positionedDo not force shaft insertionTurn fan until oil pump shaft slides in place, as shown in the following photo
A03C25A
TURN FAN TO SLIDE OIL PUMP SHAFT IN PLACE