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Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 15200
Experience:  Certified on Onan and Generac generators
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I have an Onan gen set here that has a ford diesel engine

Customer Question

Hi ,
I have an Onan gen set here that has a ford diesel engine model # ***** F-6005-A 30-31F
With a P5012/3 Bosch fuel pump
I am having trouble with the governor it lopes quite a bit especially when there is no load, do you have any onsite?
Submitted: 1 year ago.
Category: Small Engine
Expert:  Hank F. replied 1 year ago.

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

What is the model number of the genset itself?

Customer: replied 1 year ago.
The Onan model #45.0 DEF-3R/11015F
and the Serial #(###) ###-####I hope this helps.
Expert:  Hank F. replied 1 year ago.

This is an engine that I am not familiar with. However, being an Onan technician, I do have a copy of the actual Ford service manual for it.

If you are interested, I can upload a copy for you. Just let me know.

Customer: replied 1 year ago.
The fuel pump has been rebuilt , but the governor seems to not be keeping it running steady at the selected rpm.
The service manual might help I would like to take a look at it.
Expert:  Hank F. replied 1 year ago.


I have uploaded the manual for you.

Click here to download it.

Have a Merry Christmas.

Customer: replied 1 year ago.
Thanks for the manual, I am still trying to find the answer to this problem, thanks .
Expert:  Hank F. replied 1 year ago.

As with any running issue, start with the fuel. Make sure the fuel is fresh, not stale.

Make sure the fuel filter is clean, and that all fuel line connections are tight (no leaks).

Once fuel is verified good, the next thing is to test the injection system. You have to know that the injector pump and injectors are all working properly.

Then check/adjust the governor.