1980 Ski-Doo Shop Manual, Page 154Get this manual

1980 Ski-Doo Shop Manual, Page 154

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SECTION 03 SUB-SECTION 03, (IGNITION TIMING)
lock nut

3.62 mm 0.25 (.143" 01O)

=e Loosen adaptor lock nut then holding gauge with dial face toward magnetoscrew adaptor