I’m sure someone will have information for you, but for starters,
is this the type of carb you have?
I’m not sure what you mean by "torquing" down on the needle
to get the choke to work. I’m guessing the type of carb shown,
when the big knob is turned "left", the jet is opened and the
linkage closes the choke plate. Not sure if there’s a "set screw"
on this affair to adjust the choke linkage or not.
Attachments:
Prepare to be boarded!