4.17
CARBURATION AND FUEL SYSTEM
4
© Copyright 2011 Polaris Sales Inc.
9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
FUEL PUMP (CARBURATED)
This ATV is equipped with a pressure regulated fuel pump
(1-3 PSI). The pump is located under the left front fender
of the machine.
To test the fuel pump:
1. Turn fuel off.
2. Disconnect impulse line from pump.
3. Connect Mity-Vac™(PN 2870975) to the impulse line
fitting on the pump.
4. Apply 5 inches (Hg) vacuum to the pump fitting. The
diaphragm should hold vacuum indefinitely.
If fuel is present in the impulse line or vacuum chamber of
the pump, the diaphragm is ruptured. The pump must be
replaced.
Fuel Filter Replacement (Carbureted)
1. Place shop towels and / or a feel catch container
under the fuel filter.
2. Loosen the filter clamps and remove filter.
3. Install new filter onto fuel lines and install clamps.
4. Dispose of fuel / shop towels properly.
5. Check for leaks and repair if necessary.
FUEL GAUGE SENDING UNIT TEST
Fuel Sending Unit Test
If the fuel gauge reading on the instrument cluster is not
working, or if the display reading differs in large
comparison to the fuel in the tank, perform a resistance
test on the fuel sender.
1. Open the front rack storage area.
2. Remove the (4) T-25 screws securing the access
cover to the front cab as shown below.
3. Move the seal out of the sealing channel and pull up
on the front of the access cover. Remove the access
cover.
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