1986 Ski-Doo Factory Shop Manual, Page 195Get this manual
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Section 02 ENGINE SUb-section 09 (537 ENGINE TYPE)
5 Lighrmg cOI Screw M6 25121
7 Locrite 242 fbfue, medllJm s!renqlhl Harness
21 CDbo" 22 Flat washer 6.4 mm 121