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05-30-2016, 08:35 AM
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#1
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1 Rivet Member
1996 35' Land Yacht Widebody
San antonio
, Texas
Join Date: May 2016
Posts: 14
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Gen conversion from LP to GAS????
Hello folks we just purchased a land yacht wide body and our first use of the gen consumed 22 gal of LP gas which cost almost $70.
I ant to convert my gen back to gasoline. Any suggestions on how to do this effectively?
I know I will need a carburetor for gasoline
Possibly a intake manifold
And I'm assuming the gen has a place that I can mount a mech fuel pump?
I will also have to mount a fuel cell.
Anyone that has converted gens to gasoline I would appreciate your input.
Wes,
I will get model numbers and so on this evening
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05-30-2016, 09:06 AM
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#2
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Rivet Master
1991 34' Excella
Princeton
, New Jersey
Join Date: Aug 2003
Posts: 7,070
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I converted mine from gas to propane. The replacement of the carb will be easy but the limiting factor in going the other way will be a gas tank. I got my conversion from Call Central Maine Diesel. They should have the answer.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles
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05-30-2016, 09:31 AM
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#3
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Rivet Master
1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton
, Arkansas
Join Date: Mar 2013
Posts: 5,868
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Has the gen always been LP?
If it is a conversion, there is a fair chance that the carb is still in place but just not used.
Superat stultitia.
__________________
The fact that I am opinionated does not presuppose that I am wrong......
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05-30-2016, 01:18 PM
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#4
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Rivet Master
2014 25' FB Eddie Bauer
Vero Beach
, Florida
Join Date: Sep 2014
Posts: 695
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Propane is a bit less efficient than gas, but my Honda 2000s burn 2 lbs of propane per hour on full throttle.. At 4.4 pounds per gal I would have to run almost 50 hours to burn 22 gallons of propane. Even when dry camping in freezing temps I run less than 4 hours of generator time a day. And battery charging does fine on eco throttle which is more efficient.
What type of generator do you have and how long did you run it? Was there any other propane load on (especially furnace) that might have contributed to your bill?
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05-30-2016, 08:14 PM
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#5
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1 Rivet Member
1996 35' Land Yacht Widebody
San antonio
, Texas
Join Date: May 2016
Posts: 14
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Quote:
Originally Posted by GammaDog
Propane is a bit less efficient than gas, but my Honda 2000s burn 2 lbs of propane per hour on full throttle.. At 4.4 pounds per gal I would have to run almost 50 hours to burn 22 gallons of propane. Even when dry camping in freezing temps I run less than 4 hours of generator time a day. And battery charging does fine on eco throttle which is more efficient.
What type of generator do you have and how long did you run it? Was there any other propane load on (especially furnace) that might have contributed to your bill?
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Thanks for the replies!
We used only the gen for AC while driving and getting the coach registered. I will have to see if the carb is still in place? Not sure if the fuel pump is there as well?
I figured this would be a higher amount of LP than expected it certainly shocked me I will have to get the model number and let you guys know. We have already out in a lot of love and maintenance in this coach. As a mechanic/ carpenter / home builder this thing keeps me busy but I love working on it. I'll keep you guys posted.
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05-30-2016, 08:53 PM
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#6
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Rivets?
1992 29' Excella
2010 22' Interstate
Van By The River
, Georgia
Join Date: Feb 2002
Posts: 2,363
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If the generator used more propane than you expected my guess is it will use more gasoline than you expect too.
For a given volume of fuel propane has less energy than gasoline. Some people say that means it's less efficient. I guess that depends on how efficiency is defined. If you define efficiency as the amount of energy output from the system divided by the amount of energy input to the system then it's a moot issue.
Back to your problem - the generator used more propane than you expected. Is that really the case? Perhaps you refilled the propane at a supplier that charges high prices. You paid $70 for 22 gallons so that's $3.18 per gallon. I recently paid nearly $4 per gallon and that's way too high but I found myself in a location that didn't offer many propane refilling options.
Looking online I see propane prices around the country vary from under $2 to over $4. If you had only paid $2 per gallon ($44 to refill your tank) would that have been more tolerable?
I guess what I'm getting at is the fact that we don't know if your generator is running properly, if there are leaks in the system, if you have other problems, etc. Don't be too quick to eliminate propane and switch to gasoline without understanding the situation more thoroughly.
__________________
Lucius and Danielle
1992 29' Excella Classic / 2010 Interstate
2005 Chevrolet Suburban K2500 8.1L
2018 GMC Sierra K1500 SLT, 6.2L, Max Trailering
Got a cooped-up feeling, gotta get out of town, got those Airstream campin' blues...
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05-30-2016, 09:03 PM
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#7
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1 Rivet Member
1996 35' Land Yacht Widebody
San antonio
, Texas
Join Date: May 2016
Posts: 14
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Quote:
Originally Posted by nvestysly
If the generator used more propane than you expected my guess is it will use more gasoline than you expect too.
For a given volume of fuel propane has less energy than gasoline. Some people say that means it's less efficient. I guess that depends on how efficiency is defined. If you define efficiency as the amount of energy output from the system divided by the amount of energy input to the system then it's a moot issue.
Back to your problem - the generator used more propane than you expected. Is that really the case? Perhaps you refilled the propane at a supplier that charges high prices. You paid $70 for 22 gallons so that's $3.18 per gallon. I recently paid nearly $4 per gallon and that's way too high but I found myself in a location that didn't offer many propane refilling options.
Looking online I see propane prices around the country vary from under $2 to over $4. If you had only paid $2 per gallon ($44 to refill your tank) would that have been more tolerable?
I guess what I'm getting at is the fact that we don't know if your generator is running properly, if there are leaks in the system, if you have other problems, etc. Don't be too quick to eliminate propane and switch to gasoline without understanding the situation more thoroughly.
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Good points! We did find the cheapest fill station and that is quite high compared to gasoline. We did look for oaks with water and soap in a spray bottle and no leaks were detected. The reason I want to go to gasoline is that we had a 5500 Yamaha gasoline gen and it would run exactly 24 hours on 5 gal of gas. This ration is much more reasonable that 21 gal at 10 hours. Plus you can refill much easier than finding an LP station which is much more expensive than gasoline.
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05-30-2016, 09:28 PM
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#8
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Rivet Master
1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton
, Arkansas
Join Date: Mar 2013
Posts: 5,868
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On the bright side of going back to gasoline is that you can draw out of the coaches main gasoline tank with a small low pressure electric fuel pump and not worry about mounting another fuel tank, and you would have very long generator run times on a full tank of gas.
Assuming of course that your coach is not diesel powered.
Superat stultitia.
__________________
The fact that I am opinionated does not presuppose that I am wrong......
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05-31-2016, 05:11 PM
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#9
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Rivet Master
2014 25' FB Eddie Bauer
Vero Beach
, Florida
Join Date: Sep 2014
Posts: 695
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One more thought. It sounds like you just purchased this airstream. Do you know for a fact that the propane tank(s) were full when you got it? Is it possible the generator didn't burn all that propane, but the prior owner did and he may need to be converted to gas?
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06-01-2016, 07:07 AM
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#10
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1 Rivet Member
1996 35' Land Yacht Widebody
San antonio
, Texas
Join Date: May 2016
Posts: 14
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I talked to Cummings yesterday and rhe conversion is possible. The gen is the exact gen just dif fuel set up. He sent me the schematics and oarts diagram fir both.
I will need intake and complete carb assembly including air filter housing. All hoses and fittings and finally a fuel silinoid and fuel pump. The conversion will mak it a 7 not a 6500.
Everyone told me it can't be done. People are systematic robots and can't think out of the box. Once I pull the LP parts I'll have a complete LP kit to sell.
I have a deselect coach
I knew exactly what amount of LP gas was pumped in, my empty gauge is a little off. It ran longer than I expected on e so that tells me I need to change the gauge.
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