Kohler Command PRO CH750 [29/92] Governor system

Governor System

2924 690 06 Rev. K KohlerEngines.com

GOVERNOR

Engine is equipped with a centrifugal ﬂ yweight mechanical governor. It is designed to hold engine speed constant

under changing load conditions. Governor gear/ﬂ yweight mechanism is mounted inside crankcase on closure plate,

and is driven off gear on camshaft.

Governor Components

Inside Engine

A Throttle Lever B Throttle Linkage C Governor Lever D Choke Linkage

E Governor Spring F Governed Idle Spring G Control Bracket H Regulating Pin

I Governor Gear J

Locking Tab Thrust

Washer

K Governor Gear Shaft

This governor design works as follows:

● Centrifugal force acting on rotating governor gear assembly causes ﬂ yweights to move outward as speed

increases. Governor spring tension moves them inward as speed decreases.

● As ﬂ yweights move outward, they cause regulating pin to move outward.

● Regulating pin contacts tab on cross shaft causing shaft to rotate. One end of cross shaft protrudes through

crankcase. Rotating action of cross shaft is transmitted to throttle lever of carburetor through external linkage.

● When engine is at rest, and throttle is in FAST position, tension of governor spring holds throttle plate open. When

engine is operating, governor gear assembly is rotating. Force applied by regulating pin against cross shaft tends to

close throttle plate. Governor spring tension and force applied by regulating pin balance each other during

operation, to maintain engine speed.

● When load is applied and engine speed and governor gear speed decreases, governor spring tension moves

governor lever to open throttle plate wider. This allows more fuel into engine, increasing engine speed. As speed

reaches governed setting, governor spring tension and force applied by regulating pin will again offset each other to

hold a steady engine speed.

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 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 counterclockwise (viewed from end) as far as

it will turn, then torque nut to 6.8 N·m (60 in. lb.).