1981 Ski-Doo Shop Manual Supplement, Page 51Get this manual

1981 Ski-Doo Shop Manual Supplement, Page 51

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SECTION 03 SUB-SECTION 03 (I GNITION TIMING)
Install dial indicator in magneto side spark plug holeBring magneto side piston to top dead centerBack -off (rotate counter-clockwise) piston to 2.52