23
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.
Figure 37
Before removing the motor assembly, first check the
resistance of the motor lead wires.
1. Disconnect wires from inverter and locate the connector
(
A
, Figure 38).
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.
Some instances of stepper motor malfunction can be traced
to sticking linkages.
To access the linkage, remove the stepper motor as follows:
1. Release the locking tabs (
D
, Figure 40) to remove the
stepper motor cover (
E
). Set cover aside.
Figure 40
E
D
D
C
Figure 39
C
B
B
C
Figure 38
A
Not
for
Reproduction
