2003 Ski-Doo ZX Series Factory Shop Manual, Page 135Get this manual
Subsection 03
Section 04 ENGINE (493, 593, 593 HO, 693, 793 AND 793 HO ENGINE TYPES)
Using plastic hammer, tap pusher to put circlip in placeMake sure to install new circlips with tab toward top as per following photo
Install new rubber ring and round O-rings on each cylinder
A32C4CA
TYPICAL
NOTE: Carefully clean screws before reinstallation, specifically under screw headA32C4BA
TAB TOWARD TOP