Pushing the governor control lever past the detent manually stops the engine.
Maximum clockwise movement (B) of the governor control shaft stops the engine. If the governor control shaft (1) is not at the low idle position, clockwise movement (B) lets lever (9) move back away from the governor spring (12). Less compression in governor spring (12) lets riser (14) and seat (13) move away from the weight end of the shaft. The lower end of lever (18) is in the groove in riser (14). As the riser moves, lever (18) works like a bellcrank and moves pin (20) which is in the top end of the lever. The outer end of pin (20) has the shape of a ball. It fits in a hole (19) in the bottom part of lever (23). The turning of lever (18) makes lever (23) push against lever (24) which turns the fuel control shaft (21).
This makes a decrease in the amount of fuel for injection to the cylinder.
When the governor control shaft (1) is in the low idle position, more clockwise movement (B) makes pin (27) in the end of lever (28) move against lever (26). Lever (26) works as a bellcrank. As it turns from the pressure of pin (27) the other end of the lever (26) moves against the pin (25) in lever (24). Lever (24) is tight on the fuel control shaft (21) and more movement in that direction causes the pumps to stop injection and, because no fuel goes to the cylinders, the engine stops.
FUEL SYSTEM OPERATION
1. Governor control shaft. 9. Lever. 12. Governor spring. 26. Lever. 27. Pin. 28. Lever. 29. Shaft. B. Clockwise movement.
In some applications, a contact switch on the control panel for the operator activates the electric shutoff solenoid to stop the engine.