1989 Ski-Doo Repair Manual, Page 371Get this manual
Section 04 ELECTRICAL Sub-section 02
(lGNfTION TIMING)
ELECTRONIC IGNITION SYSTEMSNIPPONDENSO
ALL ENGINES WITH NIPPONDENSO ELECTRONIC IGNITION SYSTEM
This section is mainly divised in two partsthe first one using top dead center gauge to verify the flywheel timing mark positionThe second one using stroooscopic timing light to checkignition timingAywheel timing mark position verification is required to:
tlYPICAlJ
TDCgCluga
magside
a twisted crankshaft; 2Troobleshoot missing or broken flvwheellllOodruff key; 3Troubleshoot flywhell corresponding to different
1Troubleshoot
engine type;