Hi, I re-posted as you suggested.

Top burners work fine. Size of flamein oven is not affected by top burners, even if all four are going atsame time on high.

The correct model number isJGSS05BEW2BB (forgot the "J")

Regarding the orifice, and turning it 1/2 turn CCW, do you mean thebrass nut that is attached to the valve outlet?

I tried turning the orifice as you had suggested, but I didn't see any change. But when you mentioned "orifice" my first thought was the orifice was clogged. I disconnected the valve from the burner and gas inlet and electrical connections. I unscrewed the gas orifice, which is basically a bullet shaped shell with a small hole at the tip. There was a nozzle underneath this brass shell. Everything looked clean.

I blew canned air into the nozzle and I put everything back together, but when I turned on the oven, gas did come out but it did not light. I thought that perhaps I had tightened the orifice too much. I loosened the orifice about a turn, and the gas ignited, but it looked weak, the same as before. I unscrewed the orifice about a half a turn, and the flame seemed a little bigger. I unscrewed it about 1 and a half more turns, and the flame was definitely stronger, but it didn't really spread out the way I've seen in other ovens.

I didn't want to unscrew it anymore, so I put it all back together, and it reached 425 degrees in less than ten minutes. I see this as a fix.

But what did I do? It seems that increasing the distance between the orifice and the internal nozzle helped, and that this distance is critical. Can it really be that a ~1/16" adjustment makes the difference between a well functioning oven and a poorly functioning oven?

But anyway thanks for the help.

Hi.

Inside the orifice is a pyramid look like needle. By turning the orifice you are controlling the gas flow.

Simon.