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dbs944's avatar
dbs944
Explorer
Mar 24, 2014

Generators

Can someone please explain RV generators to me?

My 7500 Onan Quiet Diesel Generator has stopped working properly with a fault code of 31. This indicates there is a problem with the Overspeed Control. Apparently the engine and generator are fine; it is just a control module of some sort.

Doing some research, I’m finding the repair will be something in the area of $4K. The generator is =~1999 with just over 1000 hours. When checking for a replacement instead of repair, the same generator uninstalled is about $8.5K. It seems generated power is VERY expensive.

So I went to e-bay and new 6-7KW contractor grade diesel generators typically sell for as little as $800 up to <$2000.

What is so special with the Onan that it costs 5-10X more than other generators with similar size/capabilities? Assuming it can fit somewhere, is the cheaper generator a suitable replacement?

12 Replies

  • $4K is certainly a pricey repair, take it to a certified Onan repair facility for an estimate as it may turn out to be significantly less. Not sure why Onan generators are so expensive, they are industry proven and have company repair centers in most major cities adding to their overhead. Contractor grade generators are rarely able to be installed onboard, maybe a large portable inverter generator can do the trick. Good luck, hopefully you can resolve what ills your Onan for much less than you assume.

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