Kohler LH630-775 Service Manual page 34

Disassembly
Disassemble the carburetor using the following steps.
See Figure 5-6.
1. Remove the intake elbow and hose (if attached),
breather hose, and carburetor. Refer to Section 9 -
"Disassembly".
2. Remove the four screws and carefully separate
the air horn assembly from the carburetor body.
3. Loosen the screw securing the float assembly to
the air horn and remove the float, float shaft and
fuel inlet needle.
4. Remove the slow jet from the carburetor body.
NOTE: The main jet is a fixed jet and can be
removed if required. Fixed jets for high
altitude are available.
5. Remove the black cap on the end of the choke
shaft only if it is necessary to inspect and clean
the shaft spring.
6. Remove the low idle speed adjusting screw and
spring from the carburetor body.
7. In order to clean the "off-idle" vent ports and
bowl vent thoroughly, use a good carburetor
solvent (like Gumout™). Blow clean compressed
air through the idle adjusting needle hole. Be
careful to use a suitable shop rag to prevent
debris from hitting someone.
8. Remove the formed rubber gasket only if it is to
be replaced. If it is removed for any reason,
replace it.
Inspection/Repair
Carefully inspect all components and replace those
that are worn or damaged.
• Inspect the carburetor body for cracks, holes and
other wear or damage.
• Inspect the float for cracks, holes, and missing or
damaged float tab. Check the float hinge and pin
for wear or damage.
• Inspect the fuel inlet needle and seat for wear or
damage.
Fuel System and Governor
• The choke plate is spring loaded. Check to make
sure it moves freely on the shaft.
Always use new gaskets when servicing or reinstalling
carburetors. Repair kits are available which include
new gaskets and other components. These kits are
described on page 5.10.
Float
If symptoms described in the carburetor
troubleshooting guide indicate possible float level
problems, a check of the existing float level may be
performed as follows. It is not necessary to remove the
carburetor from the engine to check or adjust the float
level.
1. Remove the air cleaner and breather hose. Refer
to Section 9 - "Disassembly".
2. Disconnect the fuel line from the carburetor.
3. Clean dirt and debris from exterior of carburetor.
4. Remove the four screws holding the two
carburetor halves together. Carefully lift the
carburetor air horn assembly off the carburetor
body and disconnect the choke linkage.
Figure 5-4. Carburetor Mounting Detail.
5. Hold the carburetor air horn so that the float
assembly hangs vertically and rests lightly
against the fuel inlet needle. The fuel inlet needle
should be fully seated but the needle tip should
not be depressed. See Figure 5-5.
Section 5
5
5.7