Polaris A09BA50FA, User Manual

Page: 117 / 256

FUEL SYSTEM/CARBURETION
4.13
1.5 mm
.060
″
Bowl Mating
Surface
2. Open bowl drain screw by turning
counterclockwise approximately two turns. Start
and run engine for 3 to 5 seconds to allow fuel
level to stabilize in the line.
If level is out of
specification, remove carburetor and inspect inlet
needle and seat, float height, passages, etc.
NOTE: If a line was removed to perform this
procedure, it must be replaced.
FUEL PUMP
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 t (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 diaphragms must be replaced.
Fuel Filter
Fuel Pump
Impulse line
FUEL PUMP DISASSEMBLY
1. Remove the screws from the pump diaphragm
cover. Note the location of the two longer screws.
2. Remove the diaphragm cover gasket,
diaphragm, and valve body gasket.
3. Remove the outlet check valve cover, diaphragm,
and gasket.
FUEL PUMP
INSPECTION/ASSEMBLY
1. Inspect inlet and outlet check valves for cracks,
warpage or damage. Inspect the diaphragms for
cracks, holes or swelling.
2. To clean the valves or pump body, remove the set
screw and washer. Remove the valve and wash
with soap and water. Carburetor cleaner may be
used to clean the pump body when the check
valves are removed.
CAUTION: Some
carburetor cleaners are very caustic and should
not be used to clean the non-metal parts of the
fuel pump.
3. Check the sealing surfaces of the pump body and
covers. Carefully remove all traces of old gasket
and check the surfaces for damage. Replace
diaphragms and gaskets as a set.
4. Reassemble the pump in the reverse order of
disassembly. Tighten all screws evenly.