Hi, I have an 84’ 90hp 6cyl merc. The motor runs well but I’m having carb issues, I sonic cleaned and rebuilt all 3 carbs. When priming the ball fuel squirts out of the brass fitting on top of the bowl opposite the small black hose that crosses over top of the venturi. When the engine is idling there is very little fuel leakage, when revved fuel shoots out a couple inches. I replaced all needle and seats, if anyone has any suggestions I’d really appreciate it. Thanks