1999 Ski-Doo Factory Shop Manual Volume Two, Page 257Get this manual
Section 06 ELECTRICAL Subsection 02 (IGNITION TIMING)
2Start the engine and raise the engine speed to at least 2000 RPM while observing the timing marks, refer to illustrationThe magneto flywheel mark scribed previously and the crankcase arrow should be perfectly alignedIf the marks do not align, faulty trigger coil (check proper grounding of coil) or faulty CDI module could be the cause: substitute one part at time and recheck timing marks (check connectors condition prior to substituting any part)NOTE: Ignition timing may be verified when engine speed is anywhere within 2000 6000 RPMA17E0ZA
1Crankcase arrow 2Scribe mark here 3Maintain verified timing marks aligned (static timing)
Checking Ignition Timing