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Governor adjustment after engine start
① During engine start, adjust the potentiometer of engine start fuel level to regulate the fuel supply for
actuator. Sufficient fuel supply can ensure complete engine start while limiting the black smoke
produced by engine.
② After engine start, use controller to run the engine at idle speed. Idle speed potentiometer is used to
set the engine speed for starting. If the external speed switch is turned off, engine will operate at rated
speed instead of idle speed. Rated speed potentiometer is applied to adjust the rated engine speed.
Precise adjustment can be realized by using rated speed potentiometer or external trimmer
potentiometer. Rotate the rated speed setting knob in clockwise direction will increase the frequency.
③ For any unstable operation after engine start, adjust the gain or stability potentiometer to ensure
stable engine operation.
④ After engine start, make the following adjustment when the engine is running without load:
Rotate the gain potentiometer in clockwise direction until the operation is unstable. Then, rotate the gain
potentiometer in anticlockwise direction until the operation is stable. Further adjust the potentiometer in
anticlockwise direction to ensure stable operation.
Rotate the stability potentiometer in clockwise direction until the operation is unstable. Then, rotate the
stability potentiometer in anticlockwise direction until the operation is stable. Further adjust the
potentiometer in anticlockwise direction to ensure stable operation.
After the above adjustment for the gain and stability potentiometer, adjust the trimmer potentiometer to
ensure a proper rated speed.
If idle operation is required, switch on the high/low speed switch and then adjust the idle potentiometer
to ensure a proper engine speed. Rotation in clockwise direction can increase the frequency (normally
50% of the rated engine speed).
If engine still fails to operate in a stable status by the above procedures, there needs to be some
adjustment for the dial switch. Refer to the four circumstances of dial switch adjustment illustrated in
the below four figures before regulating the gain and stability potentiometer until the engine is running
stably.
1 2 3 1 2 3 1 2 3 1 2 3
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