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#4810571 - 07/10/18 05:56 PM propane or gas for generator
WhyMe Offline


Registered: 12/18/12
Posts: 544
Loc: Washington for now
bought a new generator from costco today. replaces my old 23 year old one. this one is dual fuel. propane or gas. mine old one is gas only and i have 20 gals stored for it.

now that i have the option of propane would that be a better way to go? or is gas still the best .

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#4810576 - 07/10/18 06:02 PM Re: propane or gas for generator [Re: WhyMe]
Vern_in_IL Offline


Registered: 06/25/14
Posts: 1925
Loc: IL
Propane never goes bad. Do not use the smaller tanks, use AT LEAST the hundred pound tanks at minimum, smaller tanks somehow donít put out enough pressure and it wonít run correctly.



A 20/30 pound tank will freeze up with any kind of demand worth running, and a 100lb is much cheaper to fill.


Edited by Vern_in_IL (07/10/18 06:05 PM)
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#4810586 - 07/10/18 06:18 PM Re: propane or gas for generator [Re: WhyMe]
Kestas Offline



Registered: 06/04/02
Posts: 12392
Loc: The Motor City
How much do you plan on using the generator? I use mine once every 8 years.

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#4810646 - 07/10/18 07:33 PM Re: propane or gas for generator [Re: WhyMe]
eljefino Offline


Registered: 06/15/03
Posts: 32763
Loc: ME
Even if you normally run on gasoline, finish it off with propane so it'll completely dry out the carburetor.

In the summer at least you could throw a 20lb bottle in a washtub full of tepid water to keep it from freezing up.

Liquid propane has somewhat less BTUs than gasoline per unit. I could get a 20 lb fill, which is 4.3 gallons, for $10.75 from BJs wholesale. That's $2.50 a gallon, a little cheaper than gasoline, for a little less power. But it's nice that I don't have a smelly gas can in my car. BJs claims DOT regs don't let citizens transport more than 90 lbs at a time, which to me, seems generous.

I have an aftermarket propane carb on my generator and several 20lb bottles. Will report how it works under extended heavy use.

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#4810659 - 07/10/18 07:48 PM Re: propane or gas for generator [Re: WhyMe]
chainblu Offline


Registered: 06/26/11
Posts: 577
Loc: Florida
If I could do it again, I'd go with a dual fuel generator. During the aftermath of the last hurricane that came thru here, there was no gasoline to be found. However, you could get your propane tank refilled at several places.

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#4810670 - 07/10/18 07:57 PM Re: propane or gas for generator [Re: WhyMe]
NormanBuntz Offline


Registered: 07/27/13
Posts: 2163
Loc: Outer Banks, NC
What brand did you buy? If it's a Generac, dual fuel could translate to twice as many things to go wrong. My 16kw standby Generac is 12 years old and is being held together by wire, zip ties and pressure treated wood.

For your original question, most people feel propane is safer than gasoline storage. Good luck with your purchase.
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#4810680 - 07/10/18 08:01 PM Re: propane or gas for generator [Re: WhyMe]
Vern_in_IL Offline


Registered: 06/25/14
Posts: 1925
Loc: IL
Quote:
Even if you normally run on gasoline, finish it off with propane so it'll completely dry out the carburetor.


cool
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#4810684 - 07/10/18 08:02 PM Re: propane or gas for generator [Re: WhyMe]
mx5miata Offline


Registered: 03/28/10
Posts: 547
Loc: NY
Propane might be cleaner burning not as efficient or power output not 100% sure
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#4810758 - 07/10/18 09:34 PM Re: propane or gas for generator [Re: NormanBuntz]
WhyMe Offline


Registered: 12/18/12
Posts: 544
Loc: Washington for now
Originally Posted By: NormanBuntz
What brand did you buy? If it's a Generac, dual fuel could translate to twice as many things to go wrong. My 16kw standby Generac is 12 years old and is being held together by wire, zip ties and pressure treated wood.

For your original question, most people feel propane is safer than gasoline storage. Good luck with your purchase.


Bought the champion brand. was on sale for 549.00 for the 7k model. seems to run pretty good. quieter than my old one. 3 year warranty

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#4810767 - 07/10/18 09:42 PM Re: propane or gas for generator [Re: mx5miata]
Linctex Offline


Registered: 12/31/16
Posts: 6186
Loc: Waco, TX
Originally Posted By: mx5miata
Propane might be cleaner burning not as efficient or power output not 100% sure


Truth - - unless the compression ratio is raised to take advantage of the high octane,

Power will be down only a little bit - - - BUT
You will burn a LOT more gallons of propane than gasoline.
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#4810798 - 07/10/18 10:26 PM Re: propane or gas for generator [Re: WhyMe]
Donald Offline


Registered: 03/21/04
Posts: 20547
Loc: Upstate NY
Propane has a vaporization rate from each size tank. You need to find how many BTU of propane your generator needs per hour and that will tell you the minimum tank size for a given temp. What might be fine in the summer may not work in the winter.

A 20 lb tank is good for a test, but not to run it to power anything. Minimum of 100 lb tanks as you can bring them places to get filled. Better to get a tank that is 100 gal. Or bury a 500 or 1000 gal.

Never rent propane tanks.
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#4810885 - 07/11/18 01:33 AM Re: propane or gas for generator [Re: WhyMe]
WhyMe Offline


Registered: 12/18/12
Posts: 544
Loc: Washington for now
have not bought propane in a while. exchange seems to be about $21 and refill about $4 a gallon. with less btu per gallon and higher price , it seems that gas is still the way to go?

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#4810895 - 07/11/18 02:01 AM Re: propane or gas for generator [Re: WhyMe]
Johnny2Bad Offline


Registered: 05/20/13
Posts: 1879
Loc: Saskatchewan, Canada
It's very location dependent, but Propane should be cheaper than Gasoline.

It has a little less energy, but not a huge difference.

You can buy propane in an emergency, as the refill process uses stored pressure, not electric pumps, to fill. You can't buy gas if there is no electricity.

Propane stores much better, essentially forever. Gas goes bad after some months, I would say 6 maximum but others say 12 months.

Propane gells at low temperatures, making it useless (no pressure). You can heat the tank to turn it back into a gaseous state but that can be dangerous if you don't know how to do it. Some say the critical temperature is -20F but in my experience it's closer to -35F. However it will have less pressure as it gets close to that temperature. 0F is fine though.

Agree on avoiding the BBQ-sized tanks. May as well consider using the same cylinder for the BBQ though. If you do something like that, make sure the generator is far enough away from the home to avoid carbon monoxide entry to the living space.
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#4810908 - 07/11/18 02:45 AM Re: propane or gas for generator [Re: WhyMe]
Driz Offline


Registered: 09/23/07
Posts: 284
Loc: northern NY
Only thing with gas is remembering to change it out . Then thereís the dreaded Ethanol monster. It especially corrodes and plugs carbs on gen sets because they sit so much. Donít ever use it in a Genny unless youíre actually simply burning it through at the time. Itís ok for that though. Just donít leave it sitting ? Also no matter which you use put a fuel shut off and mini filter on the line. Theyíre cheap .
Gas, no opinion. I used to drive a 350 Chevy with a 2 bbl carb and a switching rig. Some sort of gov study trial rig 1070 Chevy half tons even had air bags right down to the exact same label on the visors in later they drove as normal burned more propane than gas and did stink if you sat idling long. Also tended to give one a headache if you sat idling long.

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#4810996 - 07/11/18 07:59 AM Re: propane or gas for generator [Re: WhyMe]
Triple_Se7en Offline


Registered: 12/04/04
Posts: 8913
Loc: 1/2 hr. north of Detroit
New-age generators use natural gas.

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