Governor Adjustments; Initial Adjustment Procedure; Governed Idle Speed Adjustment; High Speed (Rpm) Adjustment - Kohler CH940-CH1000 Service Manual

Governor Adjustments

NOTE: Do not tamper with governor setting. Overspeed
is hazardous and could cause personal injury.

Initial Adjustment Procedure

Make this adjustment whenever governor arm is
loosened or removed from cross shaft. Adjust as follows:
1. Make sure throttle linkage is connected to governor
arm and throttle lever on carburetor.
2. Loosen hex nut holding governor lever to cross
shaft.
3. Move governor lever toward carburetor as far as it
will go (wide open throttle) and hold in this position.
4. Insert a long thin rod or tool into hole on cross shaft
and rotate shaft clockwise (viewed from end) as far
as it will turn, then tighten hex nut to torque
specifi cations.

Governed Idle Speed Adjustment

1. Make sure governed idle spring is in outer hole in
governor lever and hole in governed idle (outer)
adjuster.
2. Make sure governor spring is in inner slot of
governor lever and hole in high speed (inner)
adjuster. Pull governor lever away from carburetor to
limit of its travel and check that governor spring is
loose and not under any tension. Turn high-speed
(RPM) adjustment screw counter-clockwise
(if required) until spring is loose.
3. Hold governor lever away from carburetor so throttle
lever is against idle speed (RPM) adjustment screw
of carburetor. Start engine and allow to warm up,
then adjust screw to set approximately 1200 RPM.
Check using a tachometer. Turn adjustment screw
(inner) clockwise (in) to increase or counterclockwise
(out) to decrease speed.
4. Release governor lever and check that throttle lever
is in idle (centered) position. Turn governed idle
(outer) adjustment screw to obtain equipment
manufacturer's recommended idle speed
(1500-1800 RPM). Governed idle speed (RPM) is
typically 300 RPM (approximate) higher than low idle
speed.
5. Move throttle lever to wide-open/full throttle position
and hold in this position. Check RPM using a
tachometer. Turn high speed screw to obtain
intended high speed no-load RPM. Governed idle
speed must be set before making this adjustment.

High Speed (RPM) Adjustment

1. With engine running, move throttle control to fast.
Use a tachometer to check RPM speed.
2. Turn inner adjustment screw outward to decrease, or
inward to increase RPM speed. Check RPM with a
tachometer.
3. Stop when desired RPM speed is obtained.
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Fuel System and Governor
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