2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 122Get this manual

2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 122

CARBURATION AND FUEL SYSTEM CV Carburetor System Function Carburetor Component Function System Float System (Level Control)
dampens the slide movement and assists the return of the slideDiaphragm Low Pressure From Venturi Atmospheric Pressure Maintains
All systems specified fuel All throttle level in float ranges chamber (carburetor float bowl) Venting Passages in All systems
Supplies Carburetor, Vent atmospheric All throttle lines pressure to float ranges chamber to frame Supplies additional fuel
air mixture necessary for cold starting All throttle ranges Greatest effect at low throttle settings and idle Starter Choke
Lever, (Choke Cable, Plunger, Enrichment) Return Spring, Carb Passages (Starter Jet, Starter Bleed Pipe) Atmospheric Air
inlet Pilot (Idle System) Main System Pilot Jet Mainly idle Primarily Passage-ways, supplies fuel at to 14 idle and low PilotMixture
throttle Screw with throttle positions Minimal Spring Washer effect after 12 throttle and Sealing Ring, By-pass Ports (Behind