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Dual Fuel Portable Generator

Old 10-08-2020, 07:21 AM
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Default Dual Fuel Portable Generator

I am looking at this. The single fuel version has 1000 more watts and bigger engine and costs the same. I will most likely always use gasoline - but

Q. If I get the dual fuel, run it on gas and the carb gets gummed up.can it still run on propane? I do not know much about how gas vs. gasoline are carbureted.

Thanks

https://www.lowes.com/pd/DuroMax-120...ine/1000804004
Old 10-08-2020, 07:26 AM
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nothing is multi fuel without carb alteration
Old 10-08-2020, 07:34 AM
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Originally Posted by ylyl1943 View Post
nothing is multi fuel without carb alteration
It says you can switch fuels while running
Old 10-08-2020, 10:15 AM
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Multi fuel, but there is only one carb for both. Why are you worried about the carb getting gummed up? Cut fuel supply off, and starve it out when finished running. Don't store it with fuel in it.
Old 10-08-2020, 10:31 AM
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I did just that. Next time I went to use it it was still a big mess of white corrosion.
I have a multi fuel and love it. Instant starts no dumping gas in a hot generator.


Doug
Old 10-08-2020, 10:46 AM
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No way to tell just looking at the picture and reading specs. Depends how the propane is regulated. If it uses the same flow regulation as gasoline then it would not work. If it is a separate fuel system altogether then it should. Propane is less energy dense than gasoline, therefore it will always produce less power than equivalent displacement being run on gasoline.

Running the fuel out of a gas engine is considered a common way to prevent carb gum up but it does not get the gas out of the bowl on some engines and that will turn to varnish or worse yet collect moisture and cause corrosion in the case of ethanol fuels. It can also cause the needle valve seats to deteriorate. Run the fuel out and then drain the bowl if you want to be sure of future quick starts or better yet, excercise the generator once a month with a small amount of fresh fuel. This will keep everything lubed, fresh, and make sure the exciter remains charged in the generator.
Old 10-08-2020, 10:35 PM
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Originally Posted by 1blueheron View Post
No way to tell just looking at the picture and reading specs. Depends how the propane is regulated. If it uses the same flow regulation as gasoline then it would not work. If it is a separate fuel system altogether then it should. Propane is less energy dense than gasoline, therefore it will always produce less power than equivalent displacement being run on gasoline.

Running the fuel out of a gas engine is considered a common way to prevent carb gum up but it does not get the gas out of the bowl on some engines and that will turn to varnish or worse yet collect moisture and cause corrosion in the case of ethanol fuels. It can also cause the needle valve seats to deteriorate. Run the fuel out and then drain the bowl if you want to be sure of future quick starts or better yet, excercise the generator once a month with a small amount of fresh fuel. This will keep everything lubed, fresh, and make sure the exciter remains charged in the generator.
Yes, this is what I figure how else can you turn off one source and use another on the fly.

The issue with gum upped carbs is indeed as you say. I have been known to forget things. I try to rotate my gas stored and run dry but have been known to forget. So far haven't done it on a generator run it at least once each change of season.
Old 10-09-2020, 04:08 AM
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The gas only flows through the carb air chamber so a gummed up carb will have no impact.
Old 10-09-2020, 04:53 AM
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I have a tri-fuel generator from Northern Tool. Mine has a 3 position rocker switch to select which fuel type you want to burn. The manual suggests starting on gasoline then switching to the "off" position waiting for the engine to stumble then switching to the propane position. I run mine every couple of months on Rec90 just to keep it clean and lubed up. I close the fuel valve and run until empty after every use and it's never been a problem. I was surprised to see that Northern Tool isn't selling their "Tri-Fuel" units any longer. I wonder why.
Old 10-09-2020, 05:22 AM
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I have a 10k duromax. It is extremely easy to drain the fuel and carb bowl. After our last outage, I drained the gas and bowl and then ran it on propane for about 5min.
That duromax ran perfect for 6 days without a hiccup.
Old 10-09-2020, 05:28 AM
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I have a dual-fuel and it has never seen gasoline, which offers good peace of mind. I keep a small supply of Rec90, so if I have to use gasoline, it will be an extreme situation before I dump e10 into it. I think the carb has a bowl drain, but I might be getting it confused with another engine, since propane lets me not worry about it.

If electric start was an option, I wouldn't have bought it and that would've been a mistake. I didn't buy a battery for it at first, but then discovered that a cold propane start requires 5-7 manual pulls. It may take 10 or more since it's easy to pull the choke but forget to turn the key on...

What I regret is buying the dedicated battery. I have a portable jumper pack with an inverter and USB charging ports. It can start the generator, and later run lights and a TV and the cable modem without using any fuel.
Old 10-09-2020, 06:03 AM
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Originally Posted by RollerCoastr View Post
I have a dual-fuel and it has never seen gasoline, which offers good peace of mind. I keep a small supply of Rec90, so if I have to use gasoline, it will be an extreme situation before I dump e10 into it. I think the carb has a bowl drain, but I might be getting it confused with another engine, since propane lets me not worry about it.

If electric start was an option, I wouldn't have bought it and that would've been a mistake. I didn't buy a battery for it at first, but then discovered that a cold propane start requires 5-7 manual pulls. It may take 10 or more since it's easy to pull the choke but forget to turn the key on...

What I regret is buying the dedicated battery. I have a portable jumper pack with an inverter and USB charging ports. It can start the generator, and later run lights and a TV and the cable modem without using any fuel.

I have learned that those little battery pack/jump starter units are almost essential for mine. I have a 13kw generator and it doesn't have a pull start option. It seems like those crappy little generator batteries only last about 6 months because they don't get used very often. I almost always have to throw mine on the charger to start the generator. I bought one of those GooLoo jump starters and it works great. It's also nice to have because I can throw it on the boat or take it camping to keep phones charged.
Old 10-09-2020, 07:55 AM
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Yeah - it makes much more sense to have a battery unit that can be used for other things. My last power outage was from a springtime storm. The temps were moderate, so generator ran about 1/3rd of the time, and the jumper pack took care of the rest. It has paid for itself several times over in fuel costs, and I'm sure the neighbors appreciate the silence.

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