Kohler COMMAND CH18-745 User Manual download pdf (Page 40)

5.7

Section 5

Fuel System and Governor

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.

Figure 5-7. Carburetor Float Adjustment.

8. Once the proper float height is obtained, carefully

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.

9. Connect the fuel line.

10. Install the breather hose and air cleaner

assembly, following the steps in Section 11 –

‘‘Reassembly”.

Disassembly

Disassemble the carburetor using the following steps.

See Figure 5-8.

1. Remove the air cleaner, 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.

Tab

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.

Screws

Fuel Line

Float

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Kohler COMMAND CH18-745 User Manual Page 40

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