1982 Ski-Doo Shop Manual, Page 206Get this manual
SECTION 03 TRANSMISSION SUB-SECTION 03 (DRIVE PULLEY)
INSTALLATION
Clean crankshaft extension using fine steel wool and clean cloth_ CAUTION: When installing drive pulley on engine, reference mark on inner half, outer half and governor cup must be in lineLock 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 spuare shaft_ CAUTION: Be careful when installing outer half "assembly on square shaft of drive pulley to avoid scratches on "Duralon" bushing caused by square shaft edge