Re: 1954 Evinrude 15hp carb

[frankr]

I can’t tell you how to replace the #83 because I’ve never removed one. At least not that I can remember. But is certainly would seem it should be plugged.

So are you positive the bowl vent is open? If it is not, the fuel will rise and overflow. Whatever the cause, the fuel level should be below the main gasket, not way up there.