I suspect that the instructions depend on the type of regulator
you’re using. I’m also assuming you’re using the acetylene/AIR (vs.
acet/OXY) setup for that Smith torch. If so, I have the same torch,
and these instructions apply – if not, then ignore them!
If you’re using acetylene/air, 2 turns of the tank key is WAY too
much – which could lead to exactly the symptoms you’re describing.
I also have a flashback arrestor installed (which is always a good
idea) between the regulator and the hose leading out to the torch.
The flashback arrestor does reduce the flow of gas, by as much as
25%, so you may have to turn on the gas a little more than you’re
used to doing with your Prestolite if you have it. BUT … other
than that, your settings should be the same.
I turn my tank key about 1/3 of the way, turn the regulator knob
about 2/3 of a turn, then turn the knob on the torch tip just enough
to be able to QUIETLY hear the gas, and finally use the sparker to
light it. If set up correctly, you shouldn’t see soot, a yellow
flame, or anything other than a steady blue flame. The larger the
torch the louder the “pop” when it lights, but it shouldn’t sound
like a car backfiring, either. The torch tip shouldn’t overheat.
As I said, if you’re not on an acetylene/air system, then there may
be something else going on in your setup, and IGNORE these comments!
Karen Goeller @Karen_Goeller