1986 Ski-Doo Factory Shop Manual, Page 363Get this manual
Section 04 ELECTRICAL SUb-section 02 UGNITION TIMING I
4Disconnect junction block at engine then connect one lead of timing instrument (flashlight type PIN 414 012200) to the blue wIre coming from engineConnect other to ground (metallic portion of the enginel
5Install and adjust T.D.Cgauge on engine as follows:
- Rotate flywheel clockwise until piston is just before top dead centerWith gauge in adaptor, adjust roller so that it is parallel with dial faceTighten roller lock nutlock
Adaptor
NOTE: Ignition timing may cnange upon tightening Always recheck after tightening
Edge gap verification
By following either of the two procedures herein mentioned the edge gap will automatically be adjustedHowever, if the edge gap is to be verified, proceed as follows:
From timing marks, rotate flywheel clockwise 114 of turn (for 247 engine type hold advance mechanism centrifugal weight in full advance position toward magneto rim to perform dynamic edge gap verification I, then slowly turn flywheel back until timing instrument fluctuatesAt this point check the distance between generator coil end and magnet (edge gap), with cardboard strip 01 appropriate width