Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Jim, are you simply trying to turn it and it just spins? I've seen where there is area
between the threads and the valve body base that has no threads. I would pull outward
as you are unscrewing it, might get the threads to catch, and I've even slid the tip of
a blade screw driver or two under that lip and applied a little pressure down on the
handles so tips (I hate word pry) want to come up.