Governor Adjustment

b. Removal.

(1) Remove the air cleaner (para 4-23 a).

(2) Disconnect the fuel line from the car-

buretor (para 4-19 a).

(3) Remove the two cap screws (7, fig. 4-7)

and lock washers (8) that secure the carburetor (6)

to the cylinder block; remove the carburetor,

taking care to disengage the governor link (2) from

the throttle lever of the carburetor.

c. Cleaning and Inspection.

(1) Clean the exterior of the carburetor with a

cloth dampened with an approved cleaning

solvent; dry thoroughly.

(2) Inspect the carburetor for cracks, missing

adjustment needles or adjusting screws, binding or

catching of the choke lever or throttle lever,

damaged threads. and other damage; replace a

damaged carburetor.

d. Installation.

(1) Position the carburetor (6, fig. 4-7) on the

cylinder block. making sure the governor link (2)

properly engages the throttle lever; secure with two

cap screws (7) and lock washers (8).

1. T h r o t t l e bracket

(2) Connect the fuel line to the Carburetor (4.

2. Speed control disk

19 c).

3. Bushing nut

4. Governor spring

(3) Install the air cleaner (para 4-23 c).

5. Governor lever

4-21. Governor Adjustment

6. Governor shaft

7. Drive pin

The governor is designed to maintain engine speed

at 3600 rpm while the engine is running at rated

Figure 4-8. Governor adjustment points.

loads or less. If necessary, adjust the engine as

b. Loosen the bushing nut (3) slightly. Rotate

follows :

the throttle bracket counterclockwise to increase

a. The drive pin (7. fig. 4-8) in the speed control

the tension of the governor spring (4) to increase

disk (2) of the governor engages the throttle

engine speed. Rotate the throttle bracket clockwise

bracket, holding the speed control disk in a

to decrease the tension of the governor spring to

stationary position. Changing the position of the

decrease engine speed.

throttle bracket changes the position of the speed

c. Tighten the bushing nut to lock the ad-

control disk, resulting in a change of engine speed.

justment. Start the engine and check for 3600 rpm

Warning: Do not run the engine with the

speed. If necessary, readjust engine speed as

governor linkage disconnected. This will cause

described above.

dangerous overspeeding of the engine that

could result in injury to personnel and damage

to the engine.

4-1