...you know, I should have the answer to that one, but I
don't. I have a guess....that is the nozzle must be busted
off or something, and fuel is gushing into the carb "willy-
nilly" no matter what you do to the needles.... Here's why.

A guy had a plane at the field awhile back that was doing
that....flooding like crazy....way beyond what I thought was possible. Start the motor up, and it would run for just a few seconds, and quit. Try to start it back up, and it was hydralic locked. Pick the plane up and dump about an ounce or so of
fuel out of the pipe. Start it back up....same exact thing....
flooded and locked....dump out more fuel.

I swear....I would say that it is physically impossible to
draw that much fuel into the motor in that short amount
of time. I had to leave the field early that day, and the
cause was not found. I just called the guy about the result
....but he has not touched it since.

Like I said, I think the nozzle must be busted off....and
fuel is pouring into the motor at a rate that is unheard of.
Even if you had the fuel lines reversed, the worst thing
that would happen is the pipe pressure would be blowing
into the feed line, and the fuel is coming out the vent line
to the carb. When that happens, the fuel level will quickly
go down past the level of the vent line....which is positioned
at the top of the tank, and the engine will quit running.

Here's a pic of the nozzle inside the carb....looking at it
from the bottom. I wish I had the answer to this problem,
but I don't....only a guess. It might be new carby time, but
that carb is no longer available, and when they were awhile
back, they were $65.00.

If anyone else has the answer....please chime in....

I still have my thinking cap on....

Dave.