2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 125Get this manual

2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 125

CARBURATION AND FUEL SYSTEM Float System Fuel enters the float chamber (3) by means of the inlet pipe and passage, through
Pilot Screw The pilot system supplies fuel during engine operation with the throttle valve closed or slightly openedThe fuel
air mixture is metered by pilot screw and discharged into the main bore through the pilot outlet CAUTION The pilot screw
is calibrated at the factory to meet EPACARB regulations for air quality standards and is sealed with brass plug to prevent
tamperingRemoval of the tamper proof plug is not permittedFor service purposes, cleaning of the pilot circuit can be done
only by certified repair shop to ensure air quality standards are not exceeded Pilot Screw Location Inlet Pipe Brass Plug