1982 Ski-Doo Shop Manual, Page 268Get this manual
_ _-:r SECTION 04 ELECTRICAL SUB-SECTION 02 (IGNITION TIMING)
Bring engine to 6000 R.P.Mfor brief instantCheck timing mark alignmentIf flywheel mark aligns within housing marks, timing is correctStop engineTo adjust remove rewing starter assembly and starter pulley Using mm Allen key, loosen the two armature plate retaining screws and lightly move plate in appropriate direction(Refer to the difference between timing marks to determine how much to move the armature plate)