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Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 14897
Experience:  Certified on Onan and Generac generators
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I have a kohler 14/20res generator. It starts and then stops

Customer Question

I have a kohler 14/20res generator. It starts and then stops after 4 or5 seconds. I have turned it off and repeated the process many times with the same results. the code that comes up is US. What are the possible problems/solutions?
Submitted: 1 year ago.
Category: Small Engine
Expert:  Hank F. replied 1 year ago.

Hello, my name is ***** ***** I am going to assis you with this.

"US" means Under Speed. It means that the controller is sensing that the engine is not running fast enough.

Possible causes of this are:

Sticking/binding throttle linkage

Bad stepper motor (throttle controller)

Bad control board

Fuel supply issues

Too much load on the genset