The plastic carb bowl on this motor has a small brass plug on the left side. Mine have started leaking.First one then the others. I tapped them in with a small punch thinking that if conical they will spread thus fix the leak. So my questions are: Will this suffice? Should I try some JB weld on the surface? Or should I order new carburater bowls? I ran the engine after my fix, the bowls do not appear to be leaking but do not want to possibly create a lean condition.