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Open Roads Forum  >  Class A Motorhomes  >  Projects & Upgrades

 > Replaced my Generator ... Help

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Jsejmz09

Greencastle, pa

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Posted: 07/10/18 05:36pm Link  |  Quote  |  Print  |  Notify Moderator

The Onan finally died. (has been nothing but trouble). I replaced it with a a open frame generator from Lowes for under 500. But I think I may have a heat problem. I ran it for about 1/2 hour and the compartment was very hot, even tho it is open on the bottom. Should I rig a exhaust fan pulling the air out, or in this case down? Has anyone else done this, I can't be the first to be cheap.





rk911

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Posted: 07/10/18 05:38pm Link  |  Quote  |  Print  |  Notify Moderator

heat rises.


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skiatom

Oklahoma

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Posted: 07/10/18 05:51pm Link  |  Quote  |  Print  |  Notify Moderator

I have an Onan. I had a huge flywheel type fan tha blows the heat downwards. Maybe you could somehow rig a major cfm electric radiator fan to blow the heat out.

Ranger Smith

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Posted: 07/10/18 05:54pm Link  |  Quote  |  Print  |  Notify Moderator

Those generators are designed to run in open air . . . Not closed in like that. Need some kind of fan.


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wildmanbaker

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Posted: 07/10/18 06:01pm Link  |  Quote  |  Print  |  Notify Moderator

Greg, you may be whipping a dying horse, or soon to burn up. The Onan had a complete enclosure and a fan the ran off the engine, to cool it. It was designed to be in an enclosure to begin with. You really need a generator that was designed for use in an RV enclosure.


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Jim@HiTek

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Posted: 07/10/18 06:06pm Link  |  Quote  |  Print  |  Notify Moderator

Visit any auto junk yard nearby and pick up a 12V radiator fan. If necessary, you can wire it with an Off/On thermal disk to automate it's turn on and off. They're not expensive. Might have to get creative where to put it in your generator space, but you should measure any potential spaces you have before picking one up.


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chuckftboy

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Posted: 07/10/18 07:00pm Link  |  Quote  |  Print  |  Notify Moderator

There is a reason a $500 generator costs so much less than an Onan. I doubt a fan can move enough air in a compartment to keep it running.


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Jim@HiTek

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Posted: 07/10/18 07:13pm Link  |  Quote  |  Print  |  Notify Moderator

OP already changed out his Onan for something else. There's no going back most likely. So, the challenge is to help him come up with something that will work to cool off his brand new generator.

I figure if a rad fan will keep my engine coolant below 1/2 temp mark on the gage, even with the A/C running and with it being 100F out, there's probably a fan assembly out there in a junk yard somewhere that will keep his generator cool.

Let's see what other ideas we can come up with. 'Cus that's all I got.

2oldman

Farmington NM

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Posted: 07/10/18 07:23pm Link  |  Quote  |  Print  |  Notify Moderator

You also have a noise problem.

Isaac-1

SW Louisiana

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Posted: 07/10/18 07:28pm Link  |  Quote  |  Print  |  Notify Moderator

Yeah that too, I can't see this being very popular around the campground.

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