What is worse is that somebody trusted JB Weld or something similar to not only fix the prior problem, but to also NOT LEAK and potentially cause a fire.
Now this is going to sound bad, but it is actually a good thing that it snapped off - as it prevents the carb from being used "as is" . . . now it will be fixed - with a new carb center as it should have the first go round.
Just put a "Want Add" in for a new center section - you might find one for less than a complete carb core.
Best of luck!
B&S