Stepper Motor

The stepper motor (electric throttle actuator) responds to the inverter module to continuously match engine speed to the power needs of the generator.

The stepper motor (Figure 37) is attached to the top of the carburetor assembly.

2.Measure the resistance across wires (B, Figure 39).

3.Measure the resistance across wires (C, Figure 39).

4.Resistance should measure between 45 - 55 Ω.

5.If the resistance measured is outside of this specified range, replace the stepper motor.

 

 

 

B

 

 

 

 

 

C

 

 

 

C

 

 

 

 

B

 

Figure 37

 

Reproduction

 

 

 

 

Figure 39

 

Before removing the motor assembly, first check the

Some instances of stepper m tor malfunction can be traced

resistance of the motor lead wires.

 

to sticking linkages.

 

 

Not

 

To access the linkage, remove the stepper motor as follows:

1. Disconnect wires from inverter and loca e the connector

(A, Figure 38).

 

 

1. Release the lo king tabs (D, Figure 40) to remove the

 

 

 

stepper motor cover (E). Set cover aside.

A

for

 

E

 

 

 

 

D

 

 

 

D

 

Figure 38

 

 

Figure 40

 

 

 

 

 

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