1986 Ski-Doo Factory Shop Manual, Page 61Get this manual
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Section 02 ENGINE Sub-section 03 (377 ENGINE TYPE)
23, Rivet
24, Washer (6) 25 Air dUCl 26 Rocax engine 377 27 Spring (2) 28, Exhaust manifold 29, Allen screw M8 30 (4) 30, L