Kohler LH630-775 Service Manual page 39

Section 5
Fuel System and Governor
8
1
2
3
9
Figure 5-8. Governor Controls and Linkage (External) (Air Cleaner Removed for Clarity).
Adjustments
General
The governed speed setting is determined by the
position of the throttle control. It can be variable or
constant, depending on the engine application.
Initial Adjustment
NOTE: The LH760 and LH775 (EFI) engines require a
special initial adjustment procedure, which is
covered in subsection 5B. Refer to pages
5B.21-5B.22.
Make this adjustment whenever the governor lever is
loosened or removed from the cross shaft. See
Figure 5-8 and adjust as follows:
1. Make sure the throttle linkage is connected to the
governor lever and the throttle lever on the
carburetor.
2. Loosen the hex nut holding the governor lever to
the cross shaft.
3. Move the governor lever towards the carburetor
as far as it will move (wide open throttle) and
hold in position.
4. Insert a nail into the hole on the cross shaft and
rotate the shaft counterclockwise as far as it will
turn, then torque hex nut to 6.8 N·m (60 in. lb.).
5.12
4
6
7
1. Governor Lever Hex Nut
2. Governor Cross Shaft
3. Governor Lever
5
4. Throttle Lever Linkage
5. Choke Linkage
6. Choke Actuating Lever
7. Governor Spring
8. Speed Control Bracket
9. Governor Lever (Holes for Sensitivity
Adjustment)
Sensitivity Adjustment
Governor sensitivity is adjusted by repositioning the
governor spring in the holes on the governor lever. If
speed surging occurs with a change in engine load, the
governor is set too sensitive. If a big drop in speed
occurs when normal load is applied, the governor
should be set for greater sensitivity. See Figure 5-8 and
adjust as follows:
1. To increase the sensitivity, move the spring closer
to the governor cross shaft.
2. To decrease the sensitivity, move the spring away
from the governor cross shaft.
High Speed RPM Adjustment (See Figure 5-9.)
1. With the engine running, move the throttle
control to fast. Use a tachometer to check the
RPM speed.
2. Loosen the lock nut on the high speed adjusting
screw. Turn screw outward to decrease, or inward
to increase RPM speed. Check RPM with a
tachometer.
3. When the desired RPM speed is obtained,
retighten the lock nut.
NOTE: When the throttle and choke control cables
are routed side-by-side, especially under a
single clamp, there must be a small gap
between the cables to prevent internal
binding. After the high-speed setting has
been complete, check that there is gap of at
least 0.5 mm (0.020 in.) between the control
cables.