2005 Polaris Sportsman 400/500 Service Manual, Page 36Get this manual
MAINTENANCE
VENT LINES
Check fuel tank, oil tank, carburetor, battery and transmission vent lines for signs of wear, deterioration, damage or leakageReplace every two yearsBe sure vent lines are routed properly and secured with cable tiesCAUTION: Make sure lines are not kinked or pinched
CARBURETOR DRAINING
The carburetor float bowl should be drained periodically to remove moisture or sediment from the bowl, or before extended periods of storageNOTE: The bowl drain screw is located on the bottom left side of the float bowl1Turn fuel valve to the OFF position2Place clean container beneath the bowl drain spigot or bowl drain hose3Turn drain screw out two turns and allow fuel in the float bowl and fuel line to drain completely4Inspect the drained fuel for water or sediment5Tighten drain screw6Turn fuel valve to "ON"7Start machine and check for leaksNOTE: All tubes attached to the carburetor must be check for pinching or blockage, as this will effect engine performance