1980 Ski-Doo Shop Manual, Page 140Get this manual
SECTION 03 SUB-SECTION 02, (ENGINES)
BOTTOM END
CLEANING
Discard all oil seals, gaskets, "0" rings and sealing rings,
Clean all metal components in non-ferrous metal cleanerRemove old sealant from crankcase mating surfaces with Bombardier sealant stripper
Remove magneto side bearing and existing shim(s), Slide the bearing simulator (no420 876 160) and the retainIng washer on the crankshaft(See Tools Section), Position crankshaft assembly into crankcase lower halfMake sure that retaining washers are correctly seated in the grooves
CAUTION: Never use sharp object to scrape
away old sealant as score marks incurred are detrimental to crankcase sealing
Gently tap crankshaft counterweight (magside) until PTO, side bearing bears against retaining washer,
DISASSEMBLYASSEMBLY
General