1985-1995 Polaris ATV and Light Utility Hauler Service Manual, Page 338Get this manual
ENGINES Stroke Troubleshooting Engine Turns Over But Fails to Start
No fuel Dirt in fuel line or filter Fuel will not pass through fuel valve Fuel pump inoperativerestricted Tank vent plugged Carb starter circuit Engine flooded Low compression (high cylinder leakage) No spark (Spark plug fouled)
Engine Does Not Turn Over
Dead battery Starter motor does not turn Engine stuck Plugged carb pilot system Carb misadjusted Choke not adjusted properly Low compression Crankcase breather restricted Spark plug fouledweak spark Broken throttle cable Obstruction in air intake Incorrect carb jetting ETC limiting speed Reverse speed limiter limiting speed Carburetor vacuum slide stickingdiaphragm damaged Incorrect ignition timing Restricted exhaust system