1986 Ski-Doo Factory Shop Manual, Page 186Get this manual
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Section 02 ENGINE 09 (537 ENGINE TYPE)
23 GasKer {2J 24 Exhaust manifold 25 Lock washer mm 26 Cylindrical screw MB 30 (5) 27 Spring 2BSIngle exllausr pipe 29 Female ball joint 30 Hexagona