2005 Ski-Doo Tundra, Skandic, Expedition Shop Manual, Page 435Get this manual
Section 08 ELECTRICAL Subsection 01 (IGNITION TIMING)
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 break down 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 (PN 414 104 700) in the spark plug hole (magneto side) and adjust as follows:
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TYPICAL INSTALLATION OF TDC GAUGE 1Gauge on MAG side cylinder 2Adaptor lock nut