flames at venturi with NEW burners

Discussion in 'Propane Smokers' started by nygrill, Jun 18, 2016.

  1. nygrill

    nygrill Newbie

    Hi all-

    I'm new here.  Not really a smoker, but searching the internet I see that there are a lot of knowledgeable people here, so I thought I'd ask.

    I have a 48" altima grill, which has 5 straight pipe burners.  three are connected wtih crossover tube in back, and then the other two are connected.  My old burners rusted out (15 years old), so I took them out and ordered new.  Af(ter replacing them, the double burner is fine.  You turn it on, and there is a nice sound of gas, and when they light all is good.  However, the triple burner is causing flames at the venturi.  When I turn on the triple burner, (three separate knobs), the gas sounds much more like air is rushing through, as opposed to the nice soft sound of the couble burner.  When I light it, it is also quite a bit louder than the double, and after about 30 seconds, I can hear the venturi flame up and the knobs get very hot.  I've tested it by taking the cover off, and indeed the flames come right out of the venturi.

    Any ideas?  I've taken the darn thing apart so many times now.  they are brand new burners, and nothing is in them.  without the burners in, if I turn on the gas valves, all five sound the same, its just when I attach the burners, I get the louder whooshing noise in the triple.  It didn't happen before I replaced the old burners.  The burners are tubes, that seem to simply rest over the valves.

    Im attaching a picture.  If anyone can help, please do so!!!

    Thank you!

  2. daveomak

    daveomak Smoking Guru OTBS Member SMF Premier Member

    Usually the burner slides over the sized jet that lets a calibrated amount of gas to flow into the burner...  There is an opening in proximity to the jet that allows for the venture effect and to suck in air...   Sounds like the burner may not fit adequately over the jet... 

    Will the burners work OK of only 1 or 2 is operating..  are they hooked up to one gas supply...   is the jet the same size in all the gas knobs..   could be the burners are designed for a different gas flow..  ie...  lower BTU's than you are supplying...  restricting the gas flow...  maybe there is rust scale or some other obstruction in the gas line at the jets..   do they unscrew where you can inspect them...

    Pictures of the burners and venture and jets would maybe help...

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