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Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 15191
Experience:  Certified on Onan and Generac generators
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Working on a GP7500e, no voltage, put 12 volt battery across

Customer Question

working on a GP7500e , no voltage, put 12 volt battery across brushes get 14.6 volts through voltage regulator, pulled brushes , measured across brush rings on rotor, measures 70 ohm's, I am thinking rotor is bad, what do you think.
Submitted: 1 year ago.
Category: Small Engine
Customer: replied 1 year ago.
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Expert:  Hank F. replied 1 year ago.

If you are getting 70 ohms across the slip rings, it is possible you have a bad rotor, but is more likely that the slip rings are just burnished and need to be cleaned.