Specifications

MAINTENANCE
49
550 Gas/LPG 330650 (8--01)
GOVERNOR -- CONTINENTAL ENGINES (For
machines below serial number 006409)
The cam gear governor differs from a
conventional centrifugal governor, mainly in the
round steel balls used as the actuating force
producer instead of pivoting masses of weight.
When the governor is driven at increasing speeds
by the engine, the hardened steel balls move
outward forcing the conical upper race and lever
assembly toward a closed throttle position.
The lever assembly is pulled towards the open
position by an externally mounted spring. As the
speed increases, the centrifugal force created by
the balls will increase until a balanced condition
between the governor force and the spring force
exits, and the governing lever remains stationary
— holding constant engine RPM.
This built-in cam-gear governor is sealed, dust
proof, engine lubricated, compact and easily
adjusted. The control shaft floats on two needle
bearings to remove friction for closer and more
accurate control through the whole power range.
The idle surge adjusting screw, if supplied, should
be adjusted “in” just far enough to eliminate any
tendency of the engine to surge.
A
B
C
D
11123
GOVERNOR LINKAGE
A. Carburetor to Governor Rod
B. Speed Adjustment Screw
C. Lock Nut
D. Governor
TO ADJUST GOVERNOR
1. Set the machine parking brake.
FOR SAFETY: Before Leaving Or
Servicing Machine; Stop On Level
Surface, Set Parking Brake, And Turn
Off Machine.
2. Linkage adjustment: With the engine
stopped and the spring tension about
normal, the governor should hold the
throttle, (butterfly) in the wide open position.
The governor to carburetor control rod
should be adjusted in length so that the
throttle stop lever is 0.4 to 0.8 mm (0.02 to
0.03 in) off the stop pin. Be sure that the
bumper screw, if supplied, is backed out so
it doesn’t interfere.
Make sure that all the linkage at the
governor and carburetor operate freely —
without binding.
3. Speed adjustment: To increase the speed,
increase the spring tension using the
adjusting screw. To decrease the speed,
decrease the spring tension using the
adjusting screw.
4. Idle surge adjustment: (When the surge
screw is supplied) Turn the governor idle
surge adjusting screw “in” or to the right until
corrected.
5. Continue surging: This may indicate an
excessive looseness or binding of the
governor linkage, and sometimes too lean a
fuel mixture.
GOVERNOR -- GM ENGINES (For machines
serial number 006409 and above)
The integral governor for the electronic fuel
injection system requires no adjustment.
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