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115hp fuel leaking from carbs.

Chris Souza

New member
I have a 94 Mercury 115hp 4 cylinder with 4-1 barrel carbs. The top 2 carbs have idle screws, the bottom have plugs. I am told this is a 2x2 motor? Anyway, All the carbs have a threaded hole next to the idle screw/plug that is open which allows fuel to leak out. I just rebuilt all 4 carbs and paid close attention to float adjustment thinking that might be the problem. they still leak, mainly the bottom carb. I do not understand the purpose of these holes and how to prevent fuel from leaking out of them. Would it affect performance if they were also plugged?
 
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