I have a 1960 3hp Johnson Model JW-16. It hadn't been ran in a couple of years so I just rebiult the carb. It Runs great now, but I can't get the carb to quit leaking on the back side of the carb between the float bowl and main carb body. I've tried reseating it several times and have even resorted to some gasket sealer for carbs. The gasket that came with kit, seams to be a bit large but all the holes line up. Does anyone have any ideas?