1985-1995 Polaris ATV and Light Utility Hauler Service Manual, Page 350Get this manual
ENGINESCARBU RETION Magnum CV Carb Operation The fuel supply system consists of the fuel tank, vent lines (carburetor and fuel tank), fuel valve, fuel lines, fuel filter, fuel pump, and carburetorThe fuel tank vent line supplies atmospheric pressure to the fuel in the tankIt must be free of kinks and restrictions and be properly routed to allow fuel to flow from the tank and prevent contaminants from entering the tankThe fuel valve has three positions: "On", "Off' and "Reserve"With the valve handle in the "Off' position no fuel will flow through the valveWhen the "On" position is selected, fuel flows through screen and into the longer of two standpipes attached to the fuel valveWhen "Reserve" is selected, fuel flows through screen and into the shorter of the two standpipesFuel flows from the valve through filter and then to the fuel pump and carburetor