1985-1995 Polaris Snowmobiles Master Repair Manual, Page 207Get this manual
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ENGINE ELECTRICAL
Inches BTDC .165 .1 55 .155 .204 .162 .155
Derees DC 27.5 26.5 26.5 30.5 27.0 26.5
Acceptable Variances MM 3.35-5.12 3.39-4.56 3.39-4.56 4.55-5.85 3.8