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Old 09-12-2012, 01:10 PM   #1
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Onan generator

I have an Onan 7000 Wat gas generator starts and runs but won't generate.
any help and or suggestions will be greatly appreciated.
Thank you

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Old 09-12-2012, 01:21 PM   #2
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Look at the breakers if it's running then it's making power it won't run if not, if the breakers are good check the output in the j box where the wires from gennie and house are connected if the power is there then go to the transfer switch you can see where I going with this the process checking each point of the electrical system, I betting it's the transfer switch where the power stops at

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Old 09-12-2012, 01:23 PM   #3
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Had one like that once as well. You probably need to clean commutator and brushes. They build up a coating and quit making contact. Polishing commutator and lightly sanding brushes usually solves the problem . Try this before starting to throw money into new parts like regulators and control boxes. Learned this from experience. Lots of videos and photos on web about the cleaning process.
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Old 09-12-2012, 01:27 PM   #4
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Welcome to the forum. The first thing I would do is read the troubleshooting sections of the manual to see if it is throwing any codes.

You might supply some more info such as the model and where it installed. Any info helps.

Could be your transfer switch which is a common failure.
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Old 09-12-2012, 02:03 PM   #5
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I had a similar issue... There is a breaker switch on the gender under the cover. Beet to remove one screw to access it... Mine is an onan 5500, but I would think they would be similar.
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Old 09-12-2012, 02:04 PM   #6
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Darn auto type....
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Old 09-12-2012, 02:19 PM   #7
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Negative on the "if it's running, it's producing power" comment. Glazed brushes and commutator will definitely cause it not put out power. We have a Emerald Gold 5000 and it wouldn't load up. Found that one of the breakers on the gen itself had tripped.
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Old 09-12-2012, 02:35 PM   #8
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Just a silly thought but did you check to see if your motorhome is actually plugged into the Onan? Don't ask and I won't tell how I once thought my generator was not producing power and a service call I had to pay for years ago.

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