5.7
Section 5
Fuel System and Governor
5
Insulator
Carburetor
to Insulator
Gasket
Insulator to Cylinder
Head Gasket
Air Cleaner
Base Gasket
2. Disconnect the breather hose from the valve cover
or air cleaner base. Remove the two nuts, the hex
fl ange screw securing the base to the head, and
air cleaner base from the mounting studs. See
Figure 5-9.
3. Remove the gasket from the mounting studs.
4. Disconnect the fuel line from the carburetor
inlet. Disconnect the choke link and spring at the
carburetor end.
NOTE: A er disconnecting the fuel line, pinching,
clamping, or plugging the fuel line may be
needed if the fuel tank is not empty.
5. Slide the carburetor off of the mounting studs
while disconnecting the thro le link and
dampening spring.
6. Inspect the carburetor to insulator gasket,
insulator, and insulator to cylinder head gasket,
and replace as needed. See Figure 5-10.
Figure 5-10. Carburetor Gaskets.
Disassembly/Overhaul
1. Clean the exterior surfaces of dirt or foreign
material before disassembling the carburetor.
Remove the center fuel bowl screw and carefully
separate the fuel bowl from the carburetor.
Transfer any remaining fuel into an approved
container. Remove and discard the old O-ring(s).
2. Remove the fl oat pin and li out the old fl oat and
inlet needle. Discard all of the parts. The seat for
the inlet needle is not serviceable, and should not
be removed. See Figures 5-11 and 5-12.
Inlet
Needle
Spring
Pin
Float
Inlet
Needle
O-ring
Figure 5-11. Removing Float and Inlet Needle.
Figure 5-12. Float, Inlet Needle, and Spring.
3. Use an appropriate size fl at screwdriver, and
carefully remove the main jet from the carburetor.
A er the main jet has been removed, the main
nozzle can be taken out through the bo om of the
main tower. Save the parts for cleaning and reuse.
See Figure 5-13.
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