If the engine is running at some intermediate speed between idling and maximum, but at less than full load, any change in load will cause a speed change. This in turn will cause the flyweights to move “out" if there is a reduction in load, or

‘‘in " if there is an increase in load. As the weights are indirectly connected to the fuel pump control rod any movement of the weights will effect an adjustment of the position of the pump control rod, and hence the pump delivery, so stabilizing the engine speed.

If it is desired to increase the engine speed the governor control lever must be moved forward. The first result is to move the control rod up against the maximum fuel stop (at the forward end of the pump) and then to wind up the buffer spring in the control lever assembly. Increased engine speed will then cause the governor weights to move outwards until the spring resumes its neutral position, i.e. when the dogs on the lever and the buffer are in line. The engine speed will then stabilize in accordance with the position of the governor control lever.

The control lever position (limited by suitable stops) sets the maximum speed at which full delivery can be obtained i.e. the maximum speed at which full power is developed. The maximum fuel stop at the front of the pump limits the forward travel of the control rod and so sets the maximum fuel delivery.