1970-1979 Ski-Doo Snowmobiles Service Manual, Page 74Get this manual
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Table Engine
0.Ql0-0.015 in(0.25-0.38mm) 0.040-0.063 in(1.0-1.6mm) 0.012-0.018 in(0.30-0.45mm)
jPerform Fan Belt Adjustment
kPerform ignition timing as outlined in Chapter Two