Polaris RZR S Offroad Vehicle User Manual


 
3.61
ENGINE
3
9923142 - 2011 RANGER RZR / RZR S / RZR 4 Service Manual
© Copyright 2010 Polaris Sales Inc.
TROUBLESHOOTING
Engine
Spark Plug Fouling
Spark plug cap loose or faulty
Incorrect spark plug heat range or gap
PVT system calibrated incorrectly/ components worn or
mis-adjusted
Fuel quality poor (old) or octane too high
Low compression
Restricted exhaust
Weak ignition (loose coil ground, faulty coil, or stator)
Restricted air filter (main or pre-cleaner) or breather
system
Improperly assembled air intake system
Restricted engine breather system
Oil contaminated with fuel
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 or pinched
Engine flooded
Low compression (high cylinder leakage)
No spark (Spark plug fouled) ignition component
failure
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 fuel supply
Low compression
Crankcase breather restricted
Engine Idles But Will Not Accelerate
Spark plug fouled/weak spark
Broken throttle cable
Obstruction in air intake
Air box removed (reinstall all intake components)
Incorrect ignition timing
Restricted exhaust system
Cam worn excessively
Engine Has Low Power
Spark plug fouled
Cylinder, piston, ring, or valve wear or damage (check
compression)
PVT not operating properly
Restricted exhaust muffler
Cam worn excessively
Piston Failure - Scoring
Lack of lubrication
Dirt entering engine through cracks in air filter or ducts
Engine oil dirty or contaminated
Excessive Smoke and Carbon Buildup
Excessive piston-to-cylinder clearance
Wet sumping
Worn rings, piston, or cylinder
Worn valve guides or seals
Restricted breather
Air filter dirty or contaminated
Piston Failure - Scoring
Lack of lubrication
Dirt entering engine through cracks in air filter or ducts
Engine oil dirty or contaminated