1972-1981 Polaris Snowmobiles Master Repair Manual, Page 209Get this manual
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ENGINE ELECTRICAL Ignition Data
Inches BTDC .014 .002 .002 .002 .002
Running MM Inches BTDC BTDC
2.96 1.69 1.69 1.69 1.83 4.311 4.311 4.192 5.053 .116 .067 .067 .067 .0