Kohler COMMAND PRO CS10, Service Manual

Page: 38 / 154

5.4
Section 5
Fuel System and Governor
3. Low Idle Speed Setting: Place the throttle
control into the ‘‘idle’’ or ‘‘slow’’ position. Set the
low idle speed to 2000 RPM* (+150 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 equipment
manufacturer's recommendations. The
recommended low idle speed for basic
engines is 2000 RPM. To ensure best
results when setting the low idle fuel
needle, the low idle speed must not
exceed 2000 RPM (+150 RPM).
Adjustments
General
NOTE: Carburetor adjustments should be made only
after the engine has warmed up.
The carburetor is designed to deliver the correct fuel-
to-air mixture to the engine under all operating
conditions. The high idle mixture is set at the factory
and cannot be adjusted. The low idle fuel adjusting
needle is also set at the factory and has a limiting cap.
It normally does not need adjustment.
Adjusting Low Idle Fuel and Speed
NOTE: Certified engines have a limiter cap on the
idle fuel adjusting needle. Adjustment can
only be performed within the limits allowed by
the cap.
1. Start engine and run at half throttle for 5 to 10
minutes to warm up. The engine must be warm
before making final settings.
2. Low Idle Fuel Needle Setting: Place the throttle
into the ‘‘idle’’ or ‘‘slow’’ position. Turn the low
idle fuel adjusting needle in or out within the
adjustment range, to obtain the best low speed
performance.
Figure 5-1. Carburetor Adjustments.
Idle Speed
Screw
Idle Fuel
Needle with
Limiter Cap