THE FUEL SYSTEM AND GOVERNOR
33
5. Remove the pin that the float hinges on to
remove the float.
NOTE: The float is not adjustable. Spring ten-
sion against the float valve begins to build from
the horizontal position, putting progressively
more pressure between the tip of the valve and
the seat.
See Figure 4.17.
NOTE: Because the float valve is crucial to the
functioning of the carburetor, and the viton tip of
the valve is subject to wear, technicians should
replace the valve and spring any time the carbu
-
retor is disassembled for cleaning.
• A square cross-section gasket seals the bowl to
the body of the carburetor.
6. Remove the main jet using a narrow-shank
straight blade screwdriver.
See Figure 4.18.
NOTE: Fuel enters the central column through a
port about 1/2” (1cm) from the bottom, to help
prevent the ingress of any residue in the bottom
of the bowl.
NOTE: The orifice in the main jet meters fuel into
the central column.
NOTE: Air from the main jet emulsion port
enters the central column near the top, then gets
bubbled through the emulsion tube into the
metered fuel flow to promote atomization.
Figure 4.17
Float
Compression
spring
Float valve
Figure 4.18
Main jet
Bowl gasket
Bowl vent port
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