I acquired an IH Carburetor that had no idle tube in the carburetor. I ran 4-48 bottoming tap down the hole to clean it up and I did get plenty of good threads showing inside. What was strange is that the tap never really bottomed out, it instead went into a lower cavity and bottomed out on the casting below. Then, when I put my new idle tube in, it went so deep I’m afraid it will interfere with the idle adjusting needle.
Did I run the tap too deep and if so, how do I know how far to screw the idle tube in?
What I was thinking of doing is installing the idle needle first, than install the idle tube until it hits the idle needle? Then put a dab of thread lock on it because there is a little wobble in the tube when screwed to that depth. What do you think?
Any and all advice is appreciated.