4
4.21
9924864 - 2012-2014 SPORTSMAN 800 / 6X6
© Copyright 2013 Polaris Sales Inc.
FUEL TANK VENT ROUTING
Fuel Tank Vent Hose Routing
Proper fuel tank hose routing is important for proper fuel
system operation. Be sure the fuel tank vent hose is
routed correctly and not kinked.
FUEL PRESSURE REGULATOR
Operation Overview
The fuel pressure regulator maintains the required
operating system pressure of 39 psi ± 3psi. A rubber-
fiber diaphragm divides the regulator into two separate
sections-, the fuel chamber and the pressure regulating
chamber. The pressure regulating spring presses against
the valve holder (part of the diaphragm), pressing the
valve against the valve seat. The combination of
atmospheric pressure and regulating spring tension
equals the desired operating pressure. Any time the fuel
pressure against the bottom of the diaphragm exceeds
the desired (top) pressure, the valve opens, relieving the
excess pressure, returning the excess fuel back to the
tank.
Fuel Pressure Regulator Test
Refer to the “FUEL PUMP TEST” procedure.
Fuel Pressure Regulator Replacement
The regulator is a sealed, non-serviceable assembly. If it
is faulty, the pump assembly must be replaced. Refer to
the Fuel Pump Replacement procedure.
FUEL SYSTEM - GENERAL
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