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

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Coleman 424-700G Burner/Pressure Issue

I have a coleman dual fuel 424-700G stove and a lantern that both have the same issue. I mistakenly left fuel in the tanks over a winter and neither now works. I replaced the generators on both and they still don’t work.

It feels like the pumping mechanism is not working correctly. If I try to pump the pump with my finger over the air hole it is difficult to pump and does not feel like it is building up pressure in the tank. I cannot pump up the pressure and close and turn the pump handle to seal it without letting my finger off of the air hole to let air escape. Neither unit pumps like they did when they worked correctly where you could pump smoothly and feel the pressure building up and then easily turn and lock the pump handle.

If anyone can provide any guidance on what the issue might be and what I can try to do to get them back up and running correctly.

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I had a similar problem today, After taking the ump assembly to pieces i disovered that the pump"stem" needed turning slighty anti clckwise to allo tepresure to build up inthe tank. I felt very stupid buta big learning curve for me.

Posted on Jun 07, 2009

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413h coleman


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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How do you remove the burner part of a coleman grill/stove? I trying to give it a good clean. I got the 4 screws off and grill fuel bar, but for the of me, how do you remove the burner part. Kelly


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This procedure is not listed on the Coleman website or in the owners manual, however it appears to be fairly straightforward. I'd recommend using some teflon tape on the threads when screwing the burner assembly back on.

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1 Answer

My coleman 424 stove has been sitting in shed for a coulpe of years, now got it out again. Filled with petrol when pumped up I can light it but flame only lasts a few minutes then it dies as if no...


My best answer is that your pump seals have dried out and are allowing pumped up pressure to leak back past the pump seal
Try this: DO NOT LIGHT THE STOVE
Pump it up hard then quickly attach a small balloon with a rubber band around the base of the pump - where it contacts the tank. A deflated balloon or a small plastic baggie - does the balloon begin to fill with air after a few minutes - if yes then your seal is leaking.
You might try taking the pump apart and soaking the seal overnight in fuel reinstall and see if it cores your problem
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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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Got my solution by talking to a fellow at REI. He showed me how to take the Coleman apart and check for problems.

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