Kohler K9J Service Manual page 58

Sensitivity Adjustment
Governor sensitivity is adjusted by repositioning the
governor spring in the holes in the governor arm.
If set too sensitive, speed surging will occur with
any change in load. If a considerable speed drop
occurs with the application of a load, sensitivity is
set too low. The governor spring is placed in the
third hole from the end of the governor arm when
the engine leaves the factory. To increase gover-
nor control sensitivity, move the spring to a hole
closer to the cross shaft. To decrease sensitivity,
move it to a hole farther from the cross shaft.
Sensitivity adjustment may not cure a hunting
problem in all cases. If hunting persists after sen-
sitivity is adjusted, try one or more of the following
steps.
1. Set spark plug point gap to .020" and readjust
the carburetor for peak performance. (See
"Carburetor Adjustment" subsection of this
section.)
6.32
2. Stop the engine and check for free movement
of the governor linkage from idle to full open
throttle. Remove excess paint from the gover-
nor spring and make sure that there is no in-
terference between governor components and
other parts.
3. With the engine shut down the throttle will be
in the wide open position. Adjust the governor
linkage so that there is approximately 1 /32" of
space between the throttle lever and carbure-
tor body.
4. Use a tachometer to set the idle speed to
1680 RPM with the throttle lever against the
idle speed screw.
If hunting still occurs, move the governor spring to
the last hole in the governor arm. If this improves
governing but permits too great a speed reduction
when going from no load to full load, move the
spring up one position in the arm.