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SECTION 6A
FUEL SYSTEMS AND GOVERNORS
SENSITIVITY ADJUSTMENT
Govemor sensitivity is adjusted by repositioning the
governor spring іп the holes in governor arm.
If set
too sensitive, speed surging will occur with a change
in load. if a big drop in speed occurs when normal
load is applied, the govemor should be set for greater
sensitivity.
The standard spring position is in the fifth hole from
cross shaft in governor arm, and in the sixth hole
from hex. cap screw in speed control lever. The po-
Sitions can vary, depending on the engine application.
Therefore, make a note of (or mark) the spring posi-
tions before removing it from the governor arm and
speed control lever. Refer to Figure 6A-20.
БЕ
То Increase
Sensitivity
M Speed Control
Lever
Figure 6A-20.
Governor Sensitivity Adjustment.
6A.14
To increase sensitivity, increase the govemor spring
tension by moving the spring in govemor arm towards
the cross shaft.
To decrease sensitivity, and allow broader control,
decrease spring tension by moving the spring in gov-
emor arm away from the cross shaft,
ENGINE MOUNTED THROTTLE AND
CHOKE CONTROLS
Some M18 and M20 engines are equipped with
throttle and choke controls mounted to the intake man-
ifold. Refer to Figure 6A-21.
DISASSEMBLY
1. Remove the intake manifold/carburetor from
engine.
2. Remove the truss head nylock screw, spring
washer, locking tab, friction washers, and throttle.
control lever. Disconnect throttle linkage from
speed contro! lever on intake elbow.
3. Remove the self-tapping screw and throttle stop
plate from Intake manifold.
4. Remove the hex. cap screw, speed control lever,
high speed stop tab, and high speed stop bracket
from intake elbow.
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