I just rebuilt a Briggs opposed twin, and in the process, cleaned and put new gaskets in the carb & fuel pump. The engine fired right up, but gas was jetting out of some opening in the carb body I’m not able to identify. It’s the opening just above and behind the green fuel line clamp in the photo. What is this opening? And how is it suddenly now open after a simple cleaning? Did I damage a seal when using compressed air? More to the point, how to fix it? It pulses gas, so I’m guessing it ties into the fuel pump circuit for some reason.