1979 Ski-Doo Supplementary Shop Manual, Page 113Get this manual

1979 Ski-Doo Supplementary Shop Manual, Page 113

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SECTION 04 SUB-SECTION 04 (I GN IT ION TIMING)
Crankcase central mark

Magneto ring mark

3 Check air gap between magneto ring and trigger coilThe gap should be 0.8 to 1.