5.11
Section 5
Fuel System and Governor
5
4. Apply finger pressure to the throttle lever/shaft
to keep it firmly seated against the pivot in the
carburetor body. Rotate the throttle shaft until the
throttle plate closes the bore around its entire
perimeter; then tighten the screws. See Figure
5-12.
5. Operate the throttle lever. Check for binding
between the throttle plate and carburetor bore.
Loosen the screws and adjust the throttle plate as
necessary.
Torque the screws to 0.9-1.4 N·m (8-12 in. lb.).
Choke Shaft Installation
1. Install the choke return spring to the choke shaft.
2. Insert the choke lever with return spring into the
carburetor body.
3. Rotate the choke lever approximately 1/2 turn
counterclockwise. Make sure the choke return
spring hooks on the carburetor body.
4. Position the choke plate as noted and marked
during disassembly. Insert the choke plate into
the slot in the choke shaft. Make sure the choke
shaft is locked between the tabs on the choke
plate.
Fuel Inlet Seat Installation
Press the fuel inlet seat into the bore in carburetor
body until it bottoms.
Welch Plug Installation
Use Tool KLR1019 and install new plugs as follows:
1. Position the carburetor body with the welch plug
cavity to the top.
2. Place a new welch plug into the cavity with the
raised surface up.
3. Use the end of the tool that is about the same
size as the plug and flatten the plug. Do not
force the plug below the surface of the cavity.
See Figure 5-13.
4. After the plug is installed, seal it with glyptal (or
an equivalent sealant). Allow the sealant to dry.
NOTE: If a commercial sealant is not available,
fingernail polish can be used.
Figure 5-13. Installing Welch Plug.
Carburetor Reassembly
1. Install the low idle speed adjusting screw and
spring.
2. Non-Emission Compliant Carburetors Only -
a. Install the low idle fuel adjusting needle and
spring. Turn the adjusting needle in (clock
wise) until it bottoms lightly.
NOTE: The tip of the idle fuel adjusting
needle is tapered to critical
dimensions. Damage to the needle
and the seat in carburetor body will
result if the needle is forced.
b. Turn the low idle fuel adjusting needle out
(counterclockwise) as specified in the
“Adjustment” portion of this section.
3. Attach the fuel inlet needle to the float. Lower the
float/needle into the carburetor body. See Figure
5-14.
4. Install the float shaft.
Figure 5-14. Installing Float and Fuel Inlet Needle.
Float
Fuel Inlet
Needle
Tool KLR1019
Carburetor Body
New Welch Plug
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