2006 Ski Doo REV Service Shop Manual, Page 293Get this manual
Section 07 ELECTRICAL SYSTEM Subsection 01 (IGNITION SYSTEM)
Verifying Magneto Flywheel Timing Mark Position
Prior to checking the timing, it may be necessary to verify the position of the timing mark on the magneto flywheel, for the following reasons: To detect missing or broken magneto flywheel Woodruff key which would allow change of timing to occur, with eventual breakdown of the engine To correctly locate and mark timing mark on new service magneto flywheel To verify the correct location of the factory timing mark To detect wrong magneto flywheel corresponding to different engine typeTo verify the position of the timing mark on the magneto flywheel, proceed as follows: Clean the area around the spark plugs, and remove them Remove the rewind starter from the engine Install the TDC gauge in the spark plug hole, (magnetogenerator side) and adjust as follows: Position the magneto flywheel at approximately TDC1