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Old 09-26-2017, 10:50 PM   #1
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Recurring issue with Cummins Onan genset

I would like to get some feedback on Cummins Onan genset 7500. I've had 2 major outages and the first one was handled by a local dealership. They had my RV in their shop for 5 months trying to get it repaired. I'm a fulltimer so this was a MAJOR inconvenience for me. They ended up giving me their bench testing model because I threatened to sue them after all that time. Now, several years later, I have another outage and a local RV tech has had the generator for over a month. Are these things really that hard to repair? I'm at the end of my rope!
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Old 09-27-2017, 08:35 AM   #2
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No repair should take 5 months or even one month. You said you had "outages," what does that mean? Did the engine fail or the electrical generating portion fail to produce power? A repair should take a short time to diagnose, order parts, install and test the new parts. Next time I'd demand notification at each step of the process. If they won't call you, call them, better yet, visit them.
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Old 09-28-2017, 12:29 PM   #3
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I had a problem with my Cummins gen about 4 years in due to a broken/stuck linkage. Required removal and reinstall of the unit. I took it to a Cummins service center in Sikeston Mo. In out a couple of days and was as good as new. Not another hitch with the unit again. Dont know if you are going to a dealer / authorized repair center.....but the Cummins owned ones are fantastic, clean, professional....(some will say expensive...but i can tell you that level of shop is going to be a bit more). They had huge bays and lifts and were doing work on a lot of really big rigs, but they handled my genny great and even stored the motorcoach indoors at night . If i need service on my gen it goes to them. And yeah was just a couple days because they didnt have the part on hand. 5 months....Well that just means that where ever you have had it....they could not fix it ...ever.

Try going here:

https://locator.cummins.com/GlobalLo...t_locale=en_US

look for the full service ones with the BIG C logo in the locator. Those are Cummins. Te blue are just dealers.
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Old 09-28-2017, 01:52 PM   #4
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What kind of "outage?" What's wrong with the unit? Please provide a clear concise history etc. so we can assist.
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Old 09-28-2017, 02:03 PM   #5
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Quote:
Originally Posted by Taarnac View Post
I would like to get some feedback on Cummins Onan genset 7500. I've had 2 major outages and the first one was handled by a local dealership. They had my RV in their shop for 5 months trying to get it repaired. I'm a fulltimer so this was a MAJOR inconvenience for me. They ended up giving me their bench testing model because I threatened to sue them after all that time. Now, several years later, I have another outage and a local RV tech has had the generator for over a month. Are these things really that hard to repair? I'm at the end of my rope!


Your big problem is relying on RV dealerships & techs. Some do a good job but it hard to predict who will do a good job on what problem.

Take your Onan to a Cummins/Onan distributor. They are professional and can diagnose your issue quickly.
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Old 09-30-2017, 10:06 AM   #6
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Thanks for the info. My current situation is that I cannot move my unit due to raccoon damage. That's a separate issue and I'm building an electric fence to handle that. I live at an RV park, and several neighbors have used and recommended this mobile RV tech, and he was even recommended by another tech because of his experience with gensets.
Anyway, the issue both times has been with the main control board. It was running and simply shut down. No diagnostic codes because the board has power going into it, but nothing coming out. He removed the entire unit from my rig and took it to his shop. I've requested a status several times, but so far haven't received a reply.
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