Section 6.3

ENGINE CRANKING SYSTEM

 

 

STARTER MOTOR

 

 

 

 

DESCRIPTION:

 

 

The Starter Motor is a 12 volts negative ground type.

 

 

It is capable of operating on heavy duty battery input

 

 

at temperatures as low as -30 F. without any signifi-

 

 

cant change in performance. Its pinion is a 10-tooth

 

 

type having a 20- pressure angle.

 

 

TESTING:

 

 

Connect the test leads of a VOM across the Starter

 

 

Motor terminal and case. Hold the Start-Run-Stop

 

 

switch at "START". The VOM should read battery

 

 

voltage and the Starter Motor should turn.

 

 

If VOM reads 12 volts DC and the Motor does not

 

 

turn, the Motor is probably defective. Remove the

 

Figure 3. Starter Contactor

Motor and test with a 12 volts DC power source.

 

Replace the Starter Motor if defective.

 

 

 

 

 

 

 

 

Figure 4. Starter Motor

Page 6.3-3

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Generac Power Systems 941-2, 940-2 service manual Starter Motor, Testing

941-2, 940-2 specifications

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