1979 Ski-Doo Supplementary Shop Manual, Page 53Get this manual
SECTION 04 SUB-SECTION 01 (ENGINE TOLERANCES MEASUREMENT)
Position crankshaf assembly into crankcase lower half, making sure that retaining washers are correct ly seated into the grooves Gently tap crankshaft magside blade until PTOside bearing bears against reta inin washer
PTOside re tainin washer