2009 Polaris Scrambler 500 4x4 2x4 factory service manual, Page 119Get this manual

2009 Polaris Scrambler 500 4x4 2x4 factory service manual, Page 119

FUEL SYSTEMCARBURETION TROUBLESHOOTING FUEL STARVATIONLEAN MIXTURE Symptoms: Hard start or no start, bog, backfire, popping
engine runs rough misses, poor performance, bog, engine loads up, backfireG Air intake restricted (inspect intake duct) Air
filter dirtyplugged Choke plunger sticking, incorrectly adjusted choke Choke cable binding or improperly routed Incorrect
pilot airfuel screw adjustment Faulty inlet needle and seat Faulty inlet needle seat O-Ring Float level too high Poor fuel
quality (old fuel) Loose jets Worn jet needleneedle jet or other carburetor parts Dirty carburetor (air bleed passages or
jets) Weak or damaged vacuum piston return spring Fouled spark plug POOR IDLE Idle Too High Idle adjusted improperlyidle
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 needleneedle