Figure 3-12. Sisson Choke (Model RMP-J/1-10G

TM 5-4110-217-14

slack and wear at connecting points. A binding condition

will cause the governor to act slowly and regulation will

be poor. Excessive looseness will cause a hunting

condition and regulation will be erratic. Work the arm

back and forth several times by hand while the engine is

idle.

(b) If engine binding still occurs or excessive

looseness causes hunting, refer to Direct Support Unit.

(4) Speed adjustment.

(a) The speed at which the engine operates is

determined by the tension applied to the governor spring.

Increasing spring tension increases engine speed.

Decreasing spring tension decreases engine speed. The

no-load speed of the engine should be slightly higher

than the speed requirements of the connected load.

(b) Adjust the engine speed by turning the

speed adjusting nut clockwise or counterclockwise (fig.

3-13) to increase or decrease speed. Set the no-load

speed of the engine at about 1800 rpm. Check speed

Figure 3-12. Sisson Choke (Model RMP-J/1-10G

Figure 3-13. Governor System Adjustments (Model RMP- J/1-10G)

3-20