Polaris TRAIL BOSS 325 2001 Manual page 145

TROUBLESHOOTING
POOR IDLE
Symptoms: Idle too high.
S
Idle adjusted improperly/idle mixture screw damaged
S
Sticky vacuum slide
S
Throttle cable sticking, improperly adjusted, routed incorrectly
S
Choke cable sticking, improperly adjusted, routed incorrectly
IDLE TOO LOW
S
Choke cable bending or incorrectly adjusted
S
Idle speed set incorrectly
S
Idle mixture screw misadjusted or damaged
S
Belt dragging
S
Ignition timing incorrect
S
Worn jet needle/needle jet
ERRATIC IDLE
S
Choke cable bending or incorrectly adjusted
S
Throttle cable incorrectly adjusted
S
Air leaks, dirty carburetor passages (pilot circuit)
S
Pilot mixture screw damaged or adjusted incorrectly
S
Tight valves
S
Ignition timing incorrect
S
Belt dragging
S
Dirty air cleaner
S
Engine worn
S
Spark plug fouled
S
Idle speed set incorrectly (speed limiter)
S
Worn jet needle/needle jet
FUEL SYSTEM/CARBURETION
4.19