1984 Ski-Doo Shop Manual, Page 128Get this manual

1984 Ski-Doo Shop Manual, Page 128

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SECTION 02 ENGINE SUB-SECTION 06 (503 ENGINE TYPE)
magneto

Position woodruff ke y, lockwasher on crankshaft
flywheel

7,20, "Loctite 242"nut
Clean nut thread