Polaris 2003 Pro X Service Manual page 130

CARBURETION
Troubleshooting
Troubleshooting Tips, 1/4-3/8 Throttle:
S Obstruction in main jet or needle jet
S Jet needle worn or out of adjustment
S Pilot system malfunction
S Incorrect throttle valve cutaway
Troubleshooting Tips, 3/8-3/4 Throttle:
S
Main jet incorrect size or clogged (lean)
S
Needle jet setter O-ring damaged or loose
S
Needle jet/jet needle worn (rich)
Troubleshooting Tips, Full Throttle:
S
Main jet size (rich or lean)
S
Fuel filter blocked (lean)
S Fuel vent lines or check valves plugged
S Exhaust system plugged
S Air box restricted
S Fuel pump weak
S Exhaust leaking into engine compartment (rich)
S
Water in float bowl (lean)
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