Starter Motor - Polaris Magnum 2x4 Service Manual

Engine Turns Over But Fails to Start
• No fuel
• Dirt in fuel line or filter
• Fuel will not pass through fuel valve
• Fuel pump inoperative/restricted
• 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 seized, rusted, or mechanical failure
Engine Runs But Will Not Idle
• Restricted carburetor pilot system
• Carburetor misadjusted
• Choke not adjusted properly
• Low compression
• Crankcase breather restricted
Engine Idles But Will Not Rev Up
• Spark plug fouled/weak spark
• Broken throttle cable
• Obstruction in air intake
• Air box removed (reinstall all intake components)
• Incorrect or restricted carburetor jetting
• ETC switch limiting speed
• Reverse speed limiter limiting speed
• Carburetor vacuum slide sticking/diaphragm damaged
• Incorrect ignition timing
Restricted exhaust system
Engine Has Low Power
• Spark plug fouled
• Cylinder, piston, ring, or valve wear or damage (check compression)
• PVT not operating properly
• Restricted exhaust muffler
• Carburetor vacuum slide sticking/diaphragm damaged
• Dirty carburetor
Piston Failure· Scoring
• Lack of lubrication
• Dirt entering engine through cracks in air filter or ducts
• Engine oil dirty or contaminated
Polaris Industries Inc. 3.95
ENGINE
4 Stroke Troubleshooting
7/96