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Thread: Coleman gas stove quirk...

  1. 21st December 2010, 10:28 PM #1
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    Coleman gas stove quirk...

    I have a Coleman two burner gas stove that I've had for about 15 years. I've recently downsized from my 4kg gas bottle to a 2kg bottle and the Coleman doesn't seem to like it.

    On the smaller bottle it just doesn't get hot enough to boil a Billy of water, plug the bigger bottle back in and away it goes.

    Does anyone know if this is 'by design' or do I maybe have a problem with clogged jets on the stove?
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  2. 22nd December 2010, 05:39 AM #2
    fraser130
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    I would think the problem has to be with the new bottle. it it full?
    Can you try thr new bottle on something else?

    Fraser
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  3. 22nd December 2010, 06:32 AM #3
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    New bottle is full, I have tried with another 1.5kg bottle and get the same thing...
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  4. 22nd December 2010, 08:50 AM #4
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    pressures in the bottles should be about the same. Quality of the gas could be different.
    03 Disco 2a, TD5, Olso blue, 7 seater, Auto, Chipped, EGR'd, 2"lift, SLS, Dual Batteries, Provent, TM-2 engine saver
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  5. 22nd December 2010, 09:02 AM #5
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    maybe the jets are blocked
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  6. 22nd December 2010, 11:05 AM #6
    wovenrovings
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    Something i found was the hose from the bottle has a tyre valve in it to prevent leaks when disconnected. Try taking it out and seeing if it is any better. Mine was restricting so that I could only use one burner at a time.
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  7. 26th December 2010, 08:07 AM #7
    kenleyfred Guest
    the instructions om my weberQ are to use a 4.5 kg min gas bottle, when I asked they told me the smaller bottles don't have enough pressure to run it effeciently.
    I assumed they would have the same pressure.
    Kenley
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  8. 26th December 2010, 08:22 AM #8
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    Quote Originally Posted by kenleyfred View Post
    the instructions om my weberQ are to use a 4.5 kg min gas bottle, when I asked they told me the smaller bottles don't have enough pressure to run it effeciently.
    I assumed they would have the same pressure.
    Kenley
    Bottle pressure is related to how fast you withdraw the vapour, and the temperature of the liquid that is left. A larger bottle has more surface area to transfer heat inwards. Short answer is that if your bottle is getting dewy/icy to the touch it is too small for the job.

    Smaller bottles also have much smaller outlets, causing pressure drop while flowing vapour. A POL connector is the minimum for a biggish stove.
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  9. 26th December 2010, 08:24 AM #9
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    Quote Originally Posted by kenleyfred View Post
    the instructions om my weberQ are to use a 4.5 kg min gas bottle, when I asked they told me the smaller bottles don't have enough pressure to run it effeciently.
    I assumed they would have the same pressure.
    Kenley
    Pretty sure the vapour pressure in either cylinder would be the same (assuming they are the same temp) it's governed by the temp not the amount of liquid (gas) in the cylinder.


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  10. 26th December 2010, 02:13 PM #10
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    Hi Bushie,
    You would be correct for the situation where there is no gas flow.

    When gas flows, it's a matter of how quickly more gas can be vaporised in order to maintain the pressure. I suspect that the larger interfacial area between the liquid and vapor in the larger cylinder will allow the pressure to be maintained easier.

    HTH,
    Peter
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