1985 Ski-Doo snowmobile Service Manual, Page 258Get this manual
Section 03 TRANSMISSION Sub-section 03 (DRIVE PULLEY)
Apply Loctite 277 on "Duralon" bushing Do not fill set screw holes with LoctiteApply Loctite 242 on set screw threadsthen tighten until screw slightly rests against bottom of "Duralon" bushing hole
INSTALLATION
_Clean crankshaft extension using fine steel wool and clean cloth,CAUTION: When installing drive pulley on engi ne, reference mark on inner half, outer half, hub plug and governor cup must be in line
21, Bushings
Gently grind small taper at our end to ease bushing assembly and push into hub plug as Illustrated above
1,2, Innerouter half
Lock crankshaft in position as explained in removal procedureMake sure crankshaft is rotated 45 counterclockwise from T.D.Cposition and that cylinder is completely filled with starter rope or use crankshaft locking toolInstall Inner half on crankshaft extension then position outer half assembly on fixed half square shaft
21 to 27, Counterweight ass'y
Rollers and nylon washers must move freely; Install them as per illustration