Carburetor Detail; Carburetor Float Adjustment - Kohler CH18-745 Service Manual

Kohler Engine Parts Call K&T 606-678-9623 or 606-561-4983
2. Disconnect the fuel line from the carburetor. See
Figure 5-6.
3. Clean dirt and debris from exterior of carburetor.
4. Remove the four screws holding the two
carburetor halves together. Carefully lift the upper
body off the carburetor body and disconnect
choke linkage.
Fuel Line
Figure 5-6. Carburetor Detail.
5. Hold the carburetor upper body 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 5-7.
NOTE: The fuel inlet needle tip is spring loaded.
Make sure the float assembly rests
against the fuel inlet needle without
depressing the tip.
6. The correct float height adjustment is 22 mm
(0.86 in.), measured from the float bottom to the
air horn casting. Adjust the float height by
carefully bending the tab.
NOTE: Be sure to measure from the casting
surface, not the rubber gasket surface.
7. If proper float height adjustment cannot be
achieved, check to see if the fuel inlet needle is
dirty, obstructed or worn. Remove the brass
screw and float assembly to remove the fuel inlet
needle.
Float
Figure 5-7. Carburetor Float Adjustment.
Screws
8. Once the proper float height is obtained, carefully
9. Connect the fuel line.
10. Install the breather hose and air cleaner
Disassembly
Disassemble the carburetor using the following steps.
See Figure 5-8.
1. Remove the air cleaner, breather hose and
2. Remove the four screws and carefully separate
3. Loosen the screw securing the float assembly to
4. Remove the slow jet from the carburetor body.
5. Remove the black cap on the end of the choke
6. Remove the low idle speed adjusting screw and
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Fuel System and Governor
Tab
lower the carburetor air horn assembly onto the
carburetor body, connecting the choke linkage.
Install the four screws. Torque the screws to
1.7 N·m (15 in. lb.). See Figure 5-6.
assembly, following the steps in Section 11 –
''Reassembly".
carburetor. Refer to Section 9 – "Disassembly".
the air horn assembly from the carburetor body.
the air horn and remove the float, float shaft and
fuel inlet needle.
NOTE: The main jet is a fixed jet and can be
removed if required. Fixed jets for high
altitude are available.
shaft only if it is necessary to inspect and clean
the shaft spring.
spring from the carburetor body.
Section 5
5
5.7