1979 Ski-Doo Supplementary Shop Manual, Page 105Get this manual
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SECTION 04 SUB-SECTION 02 (ENGINE)
7 Fan housing 2 Circlip 3 Shim mm 4 Ball bearing 5 Fan shaft 6 Woodruff key 7 Distance sleeve 8 Pulley half 9 Shim 0.5 mm 70 Fan 77 Lockwasher 72 Nut M76 7.5 7