Polaris A07MH46AA Offroad Vehicle User Manual


 
4.48
CARBURETOR - SPORTSMAN 450
POOR IDLE
Idle Too High
Idle adjusted improperly/idle mixture screw
damaged
Sticky vacuum slide
Throttle cable sticking, improperly adjusted, routed
incorrectly
Choke cable sticking, improperly adjusted, routed
incorrectly
Plugged or restricted idle jet
Idle Too Low
Choke cable bending or incorrectly adjusted
Idle speed set incorrectly
Idle mixture screw misadjusted or damaged
Belt dragging
Ignition timing incorrect
Worn jet needle/needle jet
Plugged or restricted idle jet
Erratic Idle
Choke cable bending or incorrectly adjusted
Throttle cable incorrectly adjusted
Air leaks, dirty carburetor passages (pilot circuit)
Pilot mixture screw damaged or adjusted
incorrectly
Tight valves
Ignition timing incorrect
Belt dragging
Dirty air cleaner
Engine worn
Spark plug fouled
Idle speed set incorrectly (speed limiter)
Worn jet needle/needle jet
Plugged or restricted idle jet