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Onan Generators Restoring, operating and maintaining vintage Onan generators.

Onan Generators

What Have You Done to Your Onan Generator Today?


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Old 02-10-2018, 09:41:53 PM
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Default Re: What Have You Done to Your Onan Generator Today?

Joe, With all those cast iron Onans in that shed, you probably won't have to worry about the shed flying away if you have a hurricane!
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Old 02-10-2018, 09:46:25 PM
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Default Re: What Have You Done to Your Onan Generator Today?

Leon , 190 deg is excellent temperature for driving off water out of your oil. I heat my Biodiesel fuel oil to 170 deg after washing to get the last traces of water out of it , an hour at that temp and significant pumping aeration and is extremely dry. Dry enough to be run through the inside of a diesel injection pump . With the amount of splashing around inside the engine I would expect that this would be true for engine oil as well. You don't need 212 deg to flash off water from the oil , even though it is likely that the oil touches surfaces which are above that inside the engine. Cheers Dan
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Old 02-10-2018, 09:53:34 PM
Leon N. Leon N. is offline
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Default Re: What Have You Done to Your Onan Generator Today?

Yes, to think about it a bit more, I am measuring the oil temp at the coolest point, that is the sump. It must be much hotter as it cools the valves and the upper cylinder head. Also, I am now more convinced that the Mobile spin on oil filter is superior to the Frams because really, the back end of the filter runs significantly hotter to the touch.
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Old 02-12-2018, 04:58:27 PM
yellowlister yellowlister is offline
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Default Re: What Have You Done to Your Onan Generator Today?

Cut the 1/4 inch 3x3 angle iron to fit between the frame (73 7/8) rails under the 30 kw onan dda.. grinded all the rust and etc off them, cleaned them and painted them.. well 2 out of 3 at the moment.. might weld them up wendsday hopefully..
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Old 02-12-2018, 05:13:21 PM
Handyhiker1 Handyhiker1 is offline
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Default Re: What Have You Done to Your Onan Generator Today?

Ordered everything needed to turn my 2.5 LK into a tri fuel generator. Also figured out I need carburetor parts for a walboro carburetor. The PO didn't do well when he worked it.
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Old 02-12-2018, 06:28:00 PM
consolenut consolenut is offline
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Default Re: What Have You Done to Your Onan Generator Today?

In the air cooled world of Onans. I am going to switch to Synthetic oil probably. Mobil 1 of course. And possibly add an external oil cooler. One that the adapter goes between the block and oil filter. I am looking at the coolers that have the fan already mounted to the cooler. Thermostatically controlled of course. The cooler would add an additional quart of oil capacity. And the added cooling would have to aid it in hot weather.
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Old 02-14-2018, 12:37:06 PM
AndersonMillTexas AndersonMillTexas is offline
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Default Re: What Have You Done to Your Onan Generator Today?

Finally got around to Installing my SX460. Here is a picture if anyone wants to comment.

One note: I used flag connectors and this made a huge difference.

Acknowledgement: I copied the idea of the aluminum heat sink from another user and for the life of me I can not remember who it was.

Underneath the SX460 is a 3/8ths inch piece of wilsonart formica flooring.

Underneath I used nuts with the chunk of rubber on the end to prevent it from backing off.
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Old 02-14-2018, 01:14:19 PM
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Default Re: What Have You Done to Your Onan Generator Today?

Looks like a good install!!
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Old 02-14-2018, 03:34:14 PM
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Default Re: What Have You Done to Your Onan Generator Today?

Nice JOB! Have you put it to the test yet with heavy sustained loads?
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Old 02-14-2018, 05:35:26 PM
AndersonMillTexas AndersonMillTexas is offline
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Default Re: What Have You Done to Your Onan Generator Today?

No heavy load yet but ran with no load got 109v (have not trimmed it) and 60.7 Hz.
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