Start with a frozen turkey, and just drop it in.
Okay, don't do that.
I have the burner part of a turkey fryer, but the top part of my rig is made for seafood boils. However, I have assisted in the frying of several turkeys using my burner and other people's turkey frying gear.
That black on the pot is from unburned fuel, which seems natural with the yellow flame. Something isn't right with that rig. You should be able to get a mostly blue flame.
TURN THE BURNER OFF when you go to lower the turkey into the pot.
Once it is in, and settled, you can re-light the burner.
Turn the burner off when you lift the bird out, too. Those are the two most dangerous parts of frying a turkey.