« on: December 26, 2012, 04:09:31 PM »
I think cutting holes in the burner shield might not be the answer. It looks like you already have a sizeable opening in the shield on the corner where the burner assembly comes in. I think the problem might be that you're trapping the exhaust in the diamond shaped part of the frame, between the burner and the kettle bottom.
The diamond part of the frame appears to be 2" thick. Cutting holes in the shield below it would thus be 2" lower than might be needed, because hot exhaust wants to rise up.
You could probably test this theory by setting your pot off center to create a gap between the diamond part of the frame and the kettle. If that opening serves as a flue for the exhaust, it might tame the runaway flames and result in the burner going back to normal. If so, I would think that would mean the diamond part of the frame is the part that is in the way. You may have to cut out the midpoints on the sides of the diamond.
I'm no expert on this subject by any means, so take what I say with a grain (or bag) of salt. I'm just throwing out ideas. Definitely get a second or fifth opinion before you do any cutting.