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Old 09-11-2011, 07:41 PM   #1
Devil Dog's Avatar
Join Date: Nov 2000
Location: Yuma, AZ USA
Posts: 58
Generator issue

I have a 2006 Georgetown 370 TS Class A. When I was in Texas in May the generator quit. I was able to talk to someone in Dallas who told me to check the brushes. I pulled them out and the one on the bottom of the assembly was stuck inside the plastic housing which was melted. In fact, in fact I broke the housing trying to pry it out. The top on looked fine. Since it's all one unit I replaced it. That did not fix the problem. The generator (Marquis 5500) would run as long as the start button was held down but die once it was released. I tried many different things but it still does not work. I could look inside the housing where the brushes mount and see the place where they race on the armature was clean and shiny on the top ring but not on the bottom. I cleaned it as best I could with a emory board but not sure if it was good enough. I am at a loss as to why it's not working but I think when the weather cools down some I will see about replacing the oil pressure sensor. That is about the easiest and cheapest thing I can think of. Any thoughts? (Moved over from Forest River forums)
USMC 1974-1994

2006 Georgetown 370TS
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Old 09-11-2011, 08:04 PM   #2
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Location: Southern Wisconsin, USA
Posts: 144
You can short across the oil pressure sensor leads and see if it will start. You might find some good information in this thread.
Dave & Marilyn - Southern Wisconsin
1985 33' Pace Arrow "Titanic", 454+.040", Thorley Tri-Y
Quadrajet, Torque Cam, TH475 w/Cooler, No Dash A/C
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Old 09-12-2011, 10:51 AM   #3
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Posts: 1,528
You only said
Marquis 5500
Is that a 5.5BGM version (non-computer) or a 5.5HGAB version (computerized)? There are different manuals and approaches to troubleshooting. You need to provide the complete Model and spec number for people to help you.

Dave in Virginia
1978 Winnebago Chieftain
Dodge M400 - 440-3
Classic Winnebago Site:
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Old 09-12-2011, 11:09 AM   #4
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Location: Summerfield Fl.
Posts: 300
Had the exact same problem on my hdkba 5.5 quietdiesel. The brushes and holder come complete from Onan #0212-1303. Clean the stator slip ring with light sand paper on the end of a pencil. Mine ruined the stator and finally the controller because I did not get the slip ring clean enough causing the brushes to jump and arc.By the time it was finally fixed it took $2000 good luck.
Tom Homestead Fl.
2017 Tiffen Pheaton
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Old 10-09-2011, 11:13 PM   #5
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Join Date: Oct 2011
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I had the same problem with my onan 5.5 I replaced the brushes and block and cleaned the slip and installed the new bushes and tried to start it and a strange noise came from my onan, it was running, it was the best sound I've ever heard, now my a/c works and I can cook again, lol,
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