Coleman 425 2-burner white gas stove pops out flame on low heat
I have a Coleman 425 2-burner white gas stove, which has been a reliable piece of camping equipment for decades. Recently, however, the main burner blows itself out when the gas is turned down for a low flame. It make a popping noise when that happens. What might cause this and what remedies should I try?
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If you mean it keeps on shooting out gas when you turn the knob, that sounds like the valve has a problem, likely a tiny piece of dirt in it. I am not sure there is any fix other than to take it out and clean it, or replace it.
If for some reason you are sure it is a regulator problem, then just change it for a new one - available at many stores that sell Coleman.
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.
On top of that safety valve is a nut. Get a good fitting wrench. Turn on the oven and use that good fitting wrench on that nut. Turn it counterclockwise till the flame comes up about midways of the flame spreader. Don't get the flames too high. Midways of the spreader now. LOL
The connector for attaching the regulator to a disposable propane cylinder has a sintered bronze filter in the tip of the brass probe tube that is prone to clogging, or the bronze pellets get mashed down over time, restricting gas flow, and this will cause a portable grill or camp stove to perform poorly. The filter is so fine that it takes very good eyesight and bright light to see that it isn't solid metal, or use of a strong magnifying lens. The best solution is to buy a new Coleman regulator assembly. If you are unable to get a new regulator assembly and have the skills and the tools, you can try drilling a very small hole on the side of the probe tube with a #60 drill bit, just below the bronze filter, but near enough the end of the tube so that the hole will be past the plastic seal when the disposable cylinder is fully screwed into place. You should avoid drilling directly into the end of the probe tube, as the end of it is used to depress the Schrader valve in the disposable cylinder to allow gas to flow. A #60 wire gauge drill bit is only 0.040 inch (1.016 mm) in diameter, but makes a hole large enough to supply sufficient gas to a portable grill or a dual-burner camp stove. If you choose to perform this work, the probe should be unscrewed from the regulator body and the Schrader valve core in the probe tube should be removed before drilling. Be sure to clean all brass and bronze particles out of the probe tube before re-installing the Schrader valve core and the screwing the probe into the regulator. Use a removable-grade thread locking compound to secure the probe in the regulator body and don't over-tighten it, so as not to crush the rubber gasket. Allow the thread locking compound to cure for several hours before attempting to use the regulator. Keep in mind that this modification increases the likelihood of dirt getting into the needle valves and jets of your stove or grill, which can cause maintenance problems in the future.