Kohler COMMAND CV17-745 Service Manual page 41

Kohler Engine Parts Call K&T 606-678-9623 or 606-561-4983
NOTE: Carburetor adjustments should be made only
after the engine has warmed up.
NOTE: Certified engines may have a fixed idle or
limiter cap on the idle fuel adjusting needle.
Do not attempt steps 1 and 2 below. Proceed
directly to step 3. Step 5 can only be
performed within the limits allowed by the cap.
Adjusting Low Idle Fuel and Speed
To adjust the carburetor idle fuel and speed, see
Figure 5-5 and follow these steps.
1. With the engine stopped, turn the low idle fuel
adjusting needle (if equipped) in (clockwise) 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 the
carburetor body will result if the needle is
forced.
Figure 5-5. Carburetor Adjustments.
2. Preliminary Settings: Turn the adjusting needle
out (counterclockwise) from lightly bottomed
2-1/4 turns.
3. Start the engine and run at half throttle for 5 to 10
minutes to warm up. The engine must be warm
before making final settings. Check that the
throttle and choke plates can fully open.
NOTE: The carburetor has a self-relieving
choke. The choke plate and shaft
assembly is spring loaded. Check to
make sure the plate moves freely and is
not binding, affecting idle fuel delivery.
Carburetor Servicing
Low Idle Fuel
Adjustment
(Some Models) Nikki Carburetors
Float Replacement
If symptoms described in the carburetor
troubleshooting guide indicate float level problems,
Low Idle Speed
remove the carburetor from the engine to check and/or
(RPM) Adjustment
replace the float. Use a float kit to replace float, pin
and inlet needle or valve.
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Fuel System and Governor
4. Low Idle Speed Setting: Place the throttle
control into the "idle" or "slow" position. Set the
low idle speed to 1200 RPM* (± 75 RPM) by
turning the low idle speed adjusting screw in or
out. Check the speed using a tachometer.
*NOTE: The actual low idle speed depends on
the application. Refer to the equipment
manufacturer's recommendations. The
low idle speed for basic engines is 1200
RPM. To ensure best results when
setting the low idle fuel needle, the low
idle speed should be 1200 RPM
(± 75 RPM).
5. Low Idle Fuel Needle Setting: Place the throttle
into the "idle" or "slow" position. Turn the low idle
fuel adjusting needle in (slowly) until engine speed
decreases and then back out approximately 3/4 to
1 turn to obtain the best low speed performance.
6. Recheck the idle speed using a tachometer and
readjust the speed as necessary.
1. Remove the air cleaner and air intake
components from the carburetor as described in
Section 4.
2. Disconnect the fuel inlet line from the carburetor.
3. Disconnect governor/throttle linkage from the
carburetor.
4. Disconnect lead wires from fuel solenoid-
equipped carburetor.
5. Slide the carburetor off the retaining studs.
Remove the fuel bowl retaining screw or fuel shut-
off solenoid and drain the fuel into a safe
container. Remove the bowl from the carburetor
body.
Section 5
5.7