So I'm at a loss here. Got an old turkey fryer burner from a friend. It's seen some weather and is a bit rusted. It looks like Bayou Classics BG10 burner, but with no air shutter. My issue is got an 20 psi high pressure regulator with a needle valve flow knob on it. So I hook it up today. I'm either getting small yellow flames or when I turn it full throttle it has blue flames at the bottom and a huge yellow flame above that. I can't seem to figure out how to get the nice steady blue flames. Some advice would be very much appreciated. Thanks in advance.