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FUEL SYSTEM/CARBURETION
4.15
Bend to adjust
float
Float arms even
NEEDLE AND SEAT
LEAKAGE
TEST
1. Install the float bowl. Invert the carburetor and
install a Mity-Vact (PN 2870975) to the fuel inlet
fitting. Apply 5 PSI pressure to inlet fitting. The
needle and seat should hold pressure indefinitely.
If not, inspect needle and seat and seat O-ring.
Mity Vact (PN 2870975)
FUEL LEVEL
A fuel level test can be performed on some models if
the drain hose fitting is accessible. Be sure to
re-attach the bowl drain hose after performing the
test. A fuel level test allows you to observe the height
of the fuel in the float bowl without removing the
carburetor. The fuel level can be observed with the
engine either running or shut off, however, engine
must run briefly to allow fuel level to stabilize..
1. Attach a clear line to drain fitting. Be sure line fits
tightly on fitting. Position hose along side of
carburetor as shown.
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-Vact (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.