1972-1981 Polaris Snowmobiles Master Repair Manual, Page 388Get this manual
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CARBURETION 1981 Jetting Compensation for AltitudeTemperature
Pilot Jet60 Air Screw1.0 turn
EC44PM-02 Outside Air Temperature -40 210 200 190 170 160 -20 200 190 180 170 160 190 180