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Old Onan Electric Plant


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  #1  
Old 02-10-2018, 07:36:48 AM
Watts Watts is offline
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Default Old Onan Electric Plant

I have an old Onan Electric Plant. I am trying to find out some information on the wiring that is coming out of the unit as well as age. I would also like to find an owners manual and parts and overhaul manual too. Model and Spec# 5CW 3R/768E. Ser# 107B3309. I have included some pics of the info tag and the unit itself. Thank you for any info you folks may have.
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Old 02-10-2018, 07:49:13 AM
YellowLister YellowLister is offline
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Default Re: Old Onan electric plant

Made oct 1957.. the 3r means it's 120 240v single phase

5 kw unit. The cw is a tank of a generator and way overbuilt

Twinslan.net is where you can find manuals via the model and spec, which is e

Welcome to the stak
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Old 02-10-2018, 07:55:02 AM
Watts Watts is offline
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Default Re: Old Onan electric plant

Sorry. Pics didn't come thru. I'll try again.
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Old 02-10-2018, 07:59:07 AM
Watts Watts is offline
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Smile Re: Old Onan electric plant

Any idea on how much this beast weighs? I have it sitti g on a good heavy 4 wheeled cart but I would like to know.
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Old 02-10-2018, 08:18:41 AM
YellowLister YellowLister is offline
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Default Re: Old Onan electric plant

Looks very nice! And has the factory meter panel..

The 10 cw, 10 kw and 7.5 kw versions are about 800 pounds.. your is probably a little on the lighter side, but not by much.

If you don't already know.. you need a very hot high amp battery to fire one of these up..
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Old 02-10-2018, 08:37:35 AM
Watts Watts is offline
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Default Re: Old Onan electric plant

I did not know that about the battery. I am using a good size marine battery now and seems to work OK. Maybe I should get something bigger? Thank you.

I purchased this old girl @ a fleamarket in Thompson Conneticut some 8 to 10 years ago for $400.00 dollars. We had quite a time loading it into my truck. Guess I know why now @ almost 800 lbs. WOW.
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Old 02-10-2018, 09:04:02 AM
Pauls12 Pauls12 is online now
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Default Re: Old Onan electric plant

Welcome Watts, you can find your manuals here. http://onan.xmsi.net/
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Old 02-10-2018, 09:58:15 AM
EnginePat EnginePat is offline
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Default Re: Old Onan Electric Plant

It must have a hefty winding ,44 amps for a 5k unit!
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Old 02-10-2018, 11:24:11 AM
MBB MBB is offline
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Default Re: Old Onan Electric Plant

As Paul12 mentioned go to the link and on the keyboard press cntrl+f and search CW
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Old 02-10-2018, 01:13:06 PM
HBSaunders HBSaunders is offline
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Default Re: Old Onan Electric Plant

Did a thread on a 10CW a while back myself without a data tag, read over that might be some info that may be of use. Yes it is way overbuilt, overweight but overall it's an ONAN. Royalty of American engineering that goes way back. As the song says treat her right and she'll give you a lot..... welcome to smokstak, Howard
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