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I need more information, but I suspect you may not have a large enough regulator on your propane line. The only way to know for sure is to attach a gauge called a manometer onto the manifold that feeds the gas burners. There is a 1/8 inch pipe fitting on the manifold for this purpose. It should read 10 inches of water column. You need a capacity to run about 300,000 BTUs when everything is on at the same time. This requires a large capacity regulator. Also the line from the regulator to the range should be at least 3/4 inch pipe.
Does your grill or pool heater have a yellow flame instead of blue? If your propane tank is not just about to run empty, then you can probably thank little spiders. When a gas burning appliance sits idle for a week or more outdoors, spiders like to build nests in the venturi tubes (that's the tube with the holes in it where the combustion air gets sucked in). This changes the way the combustion air mixes with the gas and causes the gas to not burn completely. The incomplete combustion is not very hot, and so the flame appears yellow. This is not efficient. It wastes gas, is too cool for grilling steak and creates soot residues. This is very common on gas grills (bottled propane or piped natural gas). It also happens to pool heaters.
Fortunately, the fix is easy, and you usually don't need to take anything apart. Get a piece of stiff nylon string from a weed-wacker, about 12 inches long. With the burner cool, push the string into any hole in the venturi tube and spin it by rolling it between your fingers. The spider nests are sticky (made from the same stuff as spider webs) and they usually adhere to the nylon string.
Not sure what the venture tube is? It's going to be between the valve and the burner. The valve shoots a stream of gas into the venture tube through a pinhole nozzle called an "orifice". You can do a Google image search for BURNER VENTURI TUBE to see lots of different types. Every gas burning appliance uses some form of venturi tube.
Good luck. Al K
You might have the spider syndrome. A strange but common problem is that small spiders build a tiny web that blocks the gas from flowing . They find the small hole "called the orifice" that allows that gas to flow from the end of the gas hose/tube and then enter the burner. Remove the burner and look into the orifce hole; you may see a white cotten-like blockage of the orifice hole, or sometimes the web will be buily in the end of the burner tube. Either way, this is the most likely problem.. I am assuming that the burner is not old and rusting away so that the gas is not being controlled throught the burner because the burner has rust holes in it.
Hello, Disconnect the disposable bottle and make sure the stove's gas adapter is not clogged with insect debris or something. Also make sure your bottle is not empty by trying another one just in case! Douglas
It sounds like the grill just needs a good cleaning, plus when you do clean it check that the burner tubes and orfaces are free of any debris.
The orface is a tiny hole inside a small brass threaded insert where the gas blows through into the burner tubes, it is very critical that this is clear as well as the burner tubes.
How old is the grill? The size of the holes in the burner is critical. As burners age, the holes rot out, and get bigger. The velocity of the gas exiting the holes has a large effect on flame size. New burner is the most typical solution.
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.
Spiders like to create little hidey webs in the tubes of propane grills and stoves.
Take it apart as much as you can and blow compressed air through all of the holes and apertures. You can either take it to the gas station and us the $.25 air machine or buy a can of compressed air at your computer store.