1984 Ski-Doo Shop Manual, Page 305Get this manual
SECTION 04 ELECTRICAL SUB-SECTION 05 (ELECTRIC STARTER)
Starter turns, but overrunning clutch pinion does not mesh with ring gear
Worn clutch pinion gearDefective clutchPoor movement of clutch on splinesWorn clutch bushingWorn starter bushing(s)Worn ring gear