I have a 1996 Johnson Fast Strike (175). I've just noticed gas leaking from the engine. I removed the cover and noticed it coming from the middle carb on the right side, everytime i would squeeze the ball or let it run it would just flow out the side. I noticed on all the other carbs that there is what looks like a small brass ball in the side of the others. It is coming out where that brass piece should be. Help me out, please. Thanks