Kohler K9J Service Manual page 54

Figure 6-41. Installing Throttle.
After making an initial adjustment or connecting a
throttle wire, set speed adjustment as follows. Re-
fer to Figure 6-42.
1 . Start the engine and allow a few minutes for
warmup.
2. Open the throttle to full speed and check en-
gine speed with a tachometer. Speed should
be approximately 4000 RPM for Model K91 and
3600-RPM for Model K161 or K181.
3. If speed is not as required, slightly loosen the
bushing nut at the speed control disc.
4. Move the throttle bracket counterclockwise to
increase engine speed or clockwise to de-
crease speed.
5. When proper speed is set, tighten the bushing
nut.
NOTE: Do not use excessive force in tightening the
bushing nut. Excessive force could cause binding
or stripping of threads.
/
DECREASE SPEED
(
Figure 6-42. Speed Adjustment.
6.28
Governor "New Look" K181
Throttle
Linka~e ~
Governor
Arm -----,.....-/
Carburetor
Throttle Lever
~--Governor
Gear
Assembly
Governor
Spring
Throttle/
Control
Figure 6-43. Centrifugal Flyweight
Mechanical Governor.
Operation
High
Speed
Stop
Centrifugal force acting on the rotating governor
gear assembly causes the flyweights to move out-
ward as speed increases and inward as speed de-
creases. As the flyweights move outward they
force the regulating pin of the assembly to move
outward. The regulating pin contacts the tab on
the cross shaft, causing the shaft to rotate with
changing speed. One end of the cross shaft pro-
trudes through the side of the crankcase. Through
external linkage attached to the cross shaft, the
rotating action is transmitted to the throttle plate
of carburetor.
When the engine is at rest and the throttle is in
the "fast" position, the tension of the governor