Specifications

10
TC Series Governor Adjustment
1. AIR VANE
2. BACKLASH SPRING
3. GOVERNOR LINK
4. GOVERNOR SPRING
5. MOUNTING SCREW
6. SPEED ADJUSTMENT SCREW
7. SPEED CONTROL BODY
8. SPEED CONTROL LEVER
9. SPEED CONTROL PLUNGER
1
4
9
7
6
HIGH SPEED
GOVERNOR
ADJUSTMENT
INSERT THROTTLE
LINK AND SPRING
HERE
OUT TO INCREASE
IN TO DECREASE
TYPE I
(style 1)
TYPE I
(style 2)
SPEED
ADJUSTING
LEVER
2
3
SPEED
ADJUSTING
LEVER
TYPE II:
(style 3)
Three different styles of governor systems are used
on TC engines. Use the following illustrations (diags.
2 and 3) to identify the governor system used and
the following procedure to adjust the governed
engine speed.
1. Allow the engine to run for at least 5 minutes to
reach operating temperature. Make sure the air
filter (if equipped) is clean and the choke is in the
off position.
2. Using a Vibratach (part# 670156) or other
tachometer, determine the engine's R.P.M. at
idle and wide open throttle. Refer to Microfiche
card 30, or a computer parts look-up program to
obtain the recommended engine speeds.
3. Using the applicable illustration, either bend the
speed adjusting lever toward the spark plug end
of the engine to decrease high speed R.P.M., or
bend the lever in the opposite direction to increase
R.P.M. On TC Type II engines, turn the speed
adjusting screw out to increase or in to decrease
engine high speed R.P.M. If the speed adjustment
screw is turned out to increase the engine R.P.M.,
the speed control lever must be moved to allow
the speed control plunger to contact the speed
adjustment screw.
4. The low speed is set by moving the throttle
control to the lowest speed position and adjusting
the low speed adjustment screw on the carburetor.
BEND TO INCREASE SPEED
BEND TO DECREASE SPEED
Spring Color Spring Position
Orange or Green 1
Pink, Red, or Black 2
SPRING
SPRING
POSITION 1
POSITION 2
3
2
4
1
5
8
HOOK
SPRING ON
NOTCH
HOOK
SPRING ON
NOTCH
HOOK
SPRING ON
NOTCH