Question about Weber Genesis Silver B Grill

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Middle burner looks ok but has huge yellow flame

I bought a used genesis three burner. The outside burners burn with a nice blue flame, but the center burner burns tall and yellow. The center burner has been replaced, as it looks much newer than the outside burners. I purchased a new burner set, but I am not sure the burner is the problem. The center burner holes were on the bottom, so I turned it over so the holes were on top, and that didn't help. I tried adjusting the air intakes, and that made little difference. I suspect the previous owner had this problem and tried to fix it by replacing the middle burner. This apparently didn't fix it, so he gave it to the Salvation Army where I bought it. What should I do next? Do need a new manifold? Can a fix the center valve?

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Sounds to me like the new burner that was put on, has the wrong gas orifice in it. Possibly a nat gas orifice instead of a propane orifice. If it's a propane grill, take it to your local propane co and have them look at it. Also, sometimes just a spiderweb or dirt dobber nest in the burner's venturi tube can cause that kind of problem. Blow it out with an air compressor and see if that's the problem.

Posted on May 15, 2010

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Posted on Jan 02, 2017

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Hi inomura...
Look at the left burner, pipe,air hole adjustment,etc because it is operating good.
You will see a difference to it compared to the on the right.
The right pipe, air hole, or the length the pipe that are iserted in the gas control valve is different from the left.
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The left flame is nice and blue...normal, the right is yellow indicating that not enough air is getting to the flame ignition point...look to see if the air hole adjustment is different than the one on the left...there is something open more or less, improperly adjusted.
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Please take time to rate me

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This means the gas flow has to much oxygen.

Typically the air vent should nearly closed.
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