[GMCnet] Kit to run Onan on either propane or gasoline at the flip of one toggle switch

[Gerald Work]

Several of you have asked off line where to buy the kit. I designed this in concert with USCarburetion and they sell the kit(s). I make nothing on those sales, I did it only as a service to the GMC community and because I wanted that flexibility for our two GMC coaches. Once I installed the kits I never ran off gasoline again. Things work so well starting and running off propane. By the way, you will consume about the same number of gallons whether on propane or gasoline. Propane has less heat content but burns far more efficiently and completely so the net consumption is about the same.

Here is the USCarburetion web site: http://uscarb.com. Call them and ask for the GMC motorhome Onan generator kit(s) as they are not listed on their web site directly. Actually there are two of them, each with their own part number. One is for 1/2” hose from the propane tank to the Onan, the other is for 3/8” hose. Other than that they are identical except for the hose fittings.

My design work was done using 3/8” line and that worked just fine for me but the reference books all said one would need 1/2” hose to supply the correct amount of propane over that distance to power our Onan generators. The choice is yours and there is not that much difference in cost between the two kits. You can read the presentation I did on this at the GMCWS or GMCMI web sites. Enjoy!

Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR

glw...@mac.com
http://jerrywork.com

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[gene Fisher]

And
And you do not need the primer siscuit either

And it will not fit on a 23 foot gmc

--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html

[Steve Weinstock]

So what's the solution for running propane to the 4K Onan on my 23 footer ??

Do I have to find a different mounting location for the regulator ??

Thanks,
Steve W
1973 23
Southern California.

[Michael]

Will the kit work on a 26' with a 4K Onan?
--
1973 GMC 26' Glacier - Unknown Mileage - Has a new switch pitch transmission with Powerdrive

[Jack Christensen]

Jerry's kit wasn't designed for the 4K Onan and won't fit as he presets it. It is possible to put a propane conversion on the 4K in a 23. Gene
Fisher has done so, but he doesn't have any pictures on his website.
--
Jack Christensen - K6ROW,
'76 Glenbrook/Clasco - "The Silver Bullet",
Sebastopol, CA

[gene Fisher]

I have the answer, and I will show you how soon 😂😀

http://gmc49ers.blogspot.com/2015/09/onan-gmc-propane-conversion.html
http://gmc49ers.blogspot.com/2015/09/onan-gmc-propane-conversion.html

On Mon, Jun 11, 2018 at 12:11 PM Jack Christensen <capt...@sonic.net>
wrote:

--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html

[gene Fisher]

Here is another link
http://gmc49ers.blogspot.com/2017/08/the-forever-gmc-onan.html

Come to the fall rally and I will show you how

[Gerald Work]

Don’t know, never tried it on a 4k. Gene F. says it will NOT fit on the 4k.

Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR

glw...@mac.com
http://jerrywork.com

==============
Message: 3
Date: Mon, 11 Jun 2018 09:15:26 -0600
From: Michael <lil...@gmail.com>
To: gmc...@list.gmcnet.org
Subject: Re: [GMCnet] Kit to run Onan on either propane or gasoline at
the flip of one toggle switch
Message-ID: <51620.5...@gmc.mybirdfeeder.net>
Content-Type: text/plain; charset="utf-8"

Will the kit work on a 26' with a 4K Onan?
--
1973 GMC 26' Glacier - Unknown Mileage - Has a new switch pitch transmission with Powerdrive

================

[slc]

I'm interested in the propane option.
I have the 74 Glacier model all OEM propane system.
How do I tell if I have either the connection for propane 3/8" or 1/2" diameter?

Or should I just ask what was OEM sizes???

Thnx
--
GatsbysCruise. \
74GMC260 Former Glacier Model style. \
Located in Waukegan \ Keep those MiniDiscs Spinning \ MY GREYHOUND IS FASTER THAN YOUR HONOR ROLL STUDENT \ WindowsXP-Win7-Win8.1-UBUNTU STUDIO -
UBUNTU VOYAGER - Berzin Auto Center in Waukegan

[Gerald Work]

There never was a stock ability to run the Oman on propane. You have to do the adaption at the propane tank yourself so can use either the 1/2 or 3/8 inch hose, your choice. The 3/8 is easier. Call UScarburetion to order the kit and read the presentation from either GMCMI or GMCWS web sites for how to info.

Jerry

Jerry Work
The Dovetail Joint

Fine furniture designed & hand crafted

in the 1907 former Masonic Temple building
in historic Kerby, OR

http://jerrywork.com
============
Date: Wed, 13 Jun 2018 10:06:01 -0600
From: slc <NuHo...@Yandex.com>

To: gmc...@list.gmcnet.org
Subject: Re: [GMCnet] Kit to run Onan on either propane or gasoline at
the flip of one toggle switch

Message-ID: <51684.5...@gmc.mybirdfeeder.net>
Content-Type: text/plain; charset="utf-8"

I'm interested in the propane option.
I have the 74 Glacier model all OEM propane system.
How do I tell if I have either the connection for propane 3/8" or 1/2" diameter?

Or should I just ask what was OEM sizes???

Thnx
--
GatsbysCruise. \
74GMC260 Former Glacier Model style. \
Located in Waukegan \ Keep those MiniDiscs Spinning \ MY GREYHOUND IS FASTER THAN YOUR HONOR ROLL STUDENT \ WindowsXP-Win7-Win8.1-UBUNTU STUDIO -
UBUNTU VOYAGER - Berzin Auto Center in Waukegan

===========