| [GMCnet] Running the Onan now, and then isn't as good as you might think [message #317743] |
Thu, 18 May 2017 10:12  |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
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Senior Member |
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Hi matt,
I don’t know about MI, but out here in Orgun our Onans run like a top on propane right out of the stock tank. I recommend installing a second two stage regulator in parallel with the stock two stage regulator just to feed the Onan. Never have seen or experienced freezing of the regulator with that set up. Onan starts instantly and runs at a constant speed with no hunting so all the 120vac stuff also purrs like a kitten. I did a presentation at GMCWS in Coos Bay, OR, last October and an article for the GMCMI magazine explaining just how easy it is to do, the benefits, and provided lots of info on fuel consumption, etc.
The good news is it is not an either/or situation. The installation I recommend is done so you can select gas or propane via one toggle switch that can be mounted anywhere in your coach. If anyone is interested see the magazine or download the presentation from either GMCWS or GMCMI web sites.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
glwork@mac.com
http://jerrywork.com
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Message: 13
Date: Thu, 18 May 2017 08:52:51 -0600
From: Matt Colie
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Running the Onan now, and then isn't as good as
you might think
Message-ID:
Content-Type: text/plain; charset="utf-8"
Mr ERFisher wrote on Thu, 18 May 2017 09:57
> On Thu, May 18, 2017 at 6:50 AM gene Fisher wrote:
>
>> Or go to propane ??
>>
>
> Read here
> http://gmc49ers.blogspot.com/2015/09/onan-gmc-propane-conversion.html
> Gene Fisher -- 74-23,77PB/ore/ca
> "Give a man a fish; you have fed him for today --- give him a URL and
Gene,
As simple as this might sound to you, do you realize that one has to purchase a new propane tank to do this right. I used to have two pieces of LP
fueled equipment. Either side of both weeks of Michigan summer they were true PITAs. If you pull gas out of the LP tank, the tank sub-cools and the
flow stops. When I changed to a forkup trunk tank with a liquid withdrawal and a vaporizer, at least I could use the equipment in the spring when we
needed it.
I don't need to go through that again. We use the coach in both the spring and fall. (Outside of winter, that is what most of the time that is not
winter in Michigan.)
Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Still Loving OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
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Jerry & Sharon Work
78 Royale
Kerby, OR
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| Re: [GMCnet] Running the Onan now, and then isn't as good as you might think [message #317750 is a reply to message #317743] |
Thu, 18 May 2017 10:56  |
A Hamilto
Messages: 4508
Registered: April 2011
Karma: 39
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Senior Member |
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glwgmc wrote on Thu, 18 May 2017 10:12Hi matt,
I don't know about MI, but out here in Orgun our Onans run like a top on propane right out of the stock tank. I recommend installing a second two stage regulator in parallel with the stock two stage regulator just to feed the Onan. Never have seen or experienced freezing of the regulator with that set up. Onan starts instantly and runs at a constant speed with no hunting so all the 120vac stuff also purrs like a kitten. I did a presentation at GMCWS in Coos Bay, OR, last October and an article for the GMCMI magazine explaining just how easy it is to do, the benefits, and provided lots of info on fuel consumption, etc.
The good news is it is not an either/or situation. The installation I recommend is done so you can select gas or propane via one toggle switch that can be mounted anywhere in your coach. If anyone is interested see the magazine or download the presentation from either GMCWS or GMCMI web sites.
Jerry
That's fine for you folks in the great Northwet. In the South, the propane tank will run the Onan with one roof AC for about 20 hours. Two roof ACs, even less.
That means you could be packing up and taking your rig to a local propane place EVERY DAY for propane. You should be able to go twice as long with full gas tanks, and getting gasoline is easier/more convenient than getting propane.
Consider a system that you can switch from propane to gasoline before you run completely out of propane, especially if you have a propane fridge.
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| Re: [GMCnet] Running the Onan now, and then isn't as good as you might think [message #317771 is a reply to message #317743] |
Thu, 18 May 2017 15:31 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Also in the South, if you have the 4KW Onan or the 3.6 Junkerac, the output will be degraded to the extent that pulling both A/C units and interior stuff like the microwave may very well exceed the genset's capabilities. The larger fixed propane gensets we had were derated by Onan roughly 20% from their gasoline counterparts. On the upside, you will get easily twqice the oil life, and the engine will run better and cleaner on propane. My Onan runs so infrequently that it isn't worth the cost and hassle of the conversion.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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