Kohler COMMAND CH18-CH26, Service Manual

Page: 68 / 246

5A.8
Section 5A
LPG Fuel Systems
2. Manually move the governor lever, with the
throttle linkage connected, toward the carburetor as
far as it will go. Hold it in this position.
3. Looking down the throat of the carburetor, check
that the throttle plate is in the full throttle position
and that the head of the high speed collar stop
screw is in contact with the carburetor boss. If not,
loosen the carburetor mounting screws and
reposition the carburetor slightly. Torque the
carburetor mounting screws to
9.9 N·m (88 in. lb.) .
NOTE: If additional adjustment is required,
loosen the throttle linkage clamp bracket
mounting screw, set the throttle shaft to
the full throttle position against the head
of the stop screw, and retighten the clamp
mounting screw securely. See Figure
5A-14.
Figure 5A-14. Tightening Throttle Linkage Clamp
Bracket.
Nikki Carburetor
1. Reinstall the rear plug with a new sealing washer.
Tighten the plug securely.
2. Reinstall fuel transfer chamber cover with a new
gasket. Secure with the three screws.
3. Install new carburetor mounting gasket on
manifold studs, followed by the carburetor and
new air cleaner base gasket.
4. Reconnect the throttle and choke linkages, and
the fuel and vacuum lines.
5. Reinstall the air cleaner base and breather tube.
Secure base with two mounting nuts. Torque nuts
to
9.9 N·m (88 in. lb.) . Install the rest of the air
cleaner system.
6. Check to be sure all system connections are tight.
7. Reset idle RPM and recheck high idle (governed
speed) after starting and allowing sufficient
warm-up time.
Electric Lock-Off/Filter Assembly - Functional Test
The electric lock-off can be easily tested to verify that
it is functional. Remove it from the system for testing.
Using a 12 volt power supply or battery, connect one
wire lead to the positive (+) lead of power supply, and
touch remaining wire lead to negative (-) lead of
power supply. When connection is made, an audible
“click” should be heard indicating the opening of the
lock-off. While energized, blow compressed air
through it to determine if it is blocked or restricted.
Figure 5A-15.
Figure 5A-16.
Electric Lock-Off/Filter Assembly - Filter Service
The filter inside the lock-off assembly should be
replaced
every 500 hours of operation, or if it becomes
blocked or restricted. Cleaning of the filter element is
not recommended. Order a replacement filter element
by the appropriate Kohler part number.