Question about Coleman 2 Burner Dual Fuel 424-700G Grill

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Having a problem with burners not generating .

I changed the generator on my Coleman 413H and thought that would cure the problem as the stove is 20 years old and has worked wonderfully all this time. I then took the burners apart and cleaned the burners and assembled them exactly as I took them apart. My fuel is probably 5 years old.

The burners still do not generate correctly.

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So you have a yellow flame, not blue?
my mate had same problem. He now uses unleaded, adding 10 drops Redex to a gallon.
He was also told not to overfill the tank - just 3/4 full.
Works much better but he says not perfect.
Ian

Posted on Aug 28, 2008

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Coleman 424 duel fuel stove leaking fuel at control knob. Took that whole section apart today and it seems there is some sort of dark grey hard putty like gasket material in the joint there and I guess it...


A complete new valve assembly isn't very expensive and you can often get one on eBay with a new generator included. It's not worth servicing the old valve given the safety implications of leaking fuel.

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1 Answer

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Do you mean unleaded? Officially no, unless it's marked "unleaded" or "dual fuel" (in Coleman speak, dual fuel means unleaded gasoline OR white gas) which means all the seals are rated for the additives in road fuel.
Unofficially yes, but gasoline is not a good idea because it tends to clog the generator with soot, it goes stale very quickly and it smells bad.
I would stick to Coleman fuel, Primus Powerfuel or Aspen 4. You probably don't get through so much of the stuff that cost is a big issue.

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What would cause a high yellow flame on a 2 burner duel fuel stove after it has been on for a while? Could wind cause this or maybe a bad generator?


The pressure drops and so you have to pump it up a little every now and then. What I do is pump it up a hair. Reset the flames to a pretty blue. Yellow flame is too much fuel to air ratio. An air shutter adjustment is needed. Also dust in the burner can cause the secondary air to have an improper mix

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Have you tried to tighten the generator onto the valve assembly using pliers? This worked for me.

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If this is a new unit I would return it and ask for help. If you try bending it and break it its then you have a real problem.

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2 Answers

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Are you pumping the tank up all the way? I have the same problem if I have too little pressure in the tank. The instructions say pump 35 times. Try pumping 50 or 60 times- that seems to help.

Also, you can't light this one like an old 425. My old stove you could turn the gas on and then take a match neat the burner. For this stove, hold the match near the burner with the gas off and quickly turn it on.

These are two things that seemed to help me with the same problem.

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1 Answer

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