| Install cheap generator questions [message #332251] |
Thu, 17 May 2018 17:52  |
Tilerpep
Messages: 404
Registered: June 2013
Location: Raleigh, NC
Karma: 7
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I bought a cheap 4850 max, dual fuel generator as the 78 Onan has no control board, pipe and muffler, starter, or good wires. The house battery is up front, and the propane is up under the front dinette w Royale design.
So, simplest plan is to add a bbq propane tank where a rear house battery would sit, put the whole generator where the onan sits, plumb the exhaust out, and add a 12 volt radiator type fan to bring fresh air into the box. my main question is: as long as everything is installed well, probably with a physical barrier between the genny and the bbq propane tank, is that going to be a problem?
And a backpressure question follows, is it ok to just plumb pipe out to an appropriate exit point, which could be two to five feet of pipe AFTER THE muffler? I would think the main advantage of moving the muffler outside (extra pipe before the muffler) the box is heat, yes?
In four years, my pattern of generator use is pretty limited to roof AC going down the road, and 15 minutes in the morning when boondocking to run my Keurig coffeemaker. Oh, and that time the alternator belt flung off and I ran the genny to keep going!
I could plumb in the big original ASME tank, but then I have two regulators (one at tank, and one at generator) as it comes ready to attach to a BBQ type tank. Am i correct two regulators don't work correctly?
All pictures, ideas, improvements, etc are appreciated
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
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| Re: Install cheap generator questions [message #332252 is a reply to message #332251] |
Thu, 17 May 2018 17:55  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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I put a 7500 in my 23'. It had had a junkerac varispeed nightmare. Went with it. I bolted the muffler to the bumper and plumbed to it. Worked fine.
--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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| Re: Install cheap generator questions [message #332255 is a reply to message #332252] |
Thu, 17 May 2018 18:44 |
Tilerpep
Messages: 404
Registered: June 2013
Location: Raleigh, NC
Karma: 7
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Senior Member |
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Johnny, I remember you made reference to a certain kind of fuel pump for your install. Low pressure because it is expecting gravity feed. What was that term?
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
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| Re: [GMCnet] Install cheap generator questions [message #332256 is a reply to message #332251] |
Thu, 17 May 2018 20:19 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Tyler,
Google "Lawn Mower Fuel Pump" and you'll find a bunch of what I call
"crankcase pulsation pumps". They're plastic bodied pumps with a diaphragm
which is operated by the pulsations in the crankcase. There are three hose
connections: 1. To the crankcase to pick up the pressure variations. 2.
Fuel In. 3. Fuel Out. Could hardly be simpler or cheaper. Hardest thing
is finding the place to tap into crankcase pressure -- probably the rocker
cover or the oil fill tube.
I don't think much of the portable tank back there in the heat. You
shouldn't have any trouble with the regulators -- Check Jerry Work's LGP
conversion for "how to".
Ken H.
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Ken Henderson
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www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: Install cheap generator questions [message #332284 is a reply to message #332251] |
Fri, 18 May 2018 19:19 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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http://www.gmcmhphotos.com/photos/new-genset/p59102-pump-plumbing.html
Pictures of mine on the photo site. Album is called new genset. It shows among other things, how I connected the pulse line, and the pump mounted on the bay wall. Pulse pump was 6 bucks shipped prime. It also shows how I modified the dipstick to get crankcase pulses without getting oil as well in the line.
While the pictures are the genset I used, the pump system will work on any of them. Remembeer, the needle valve for gasoline is only spec'ed to handle a head of less than one foot. Nobody's electric pump is going to work, and the pulse pump is cheaper anyhow.
--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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