I have a 120 mercruiser with a merc carb on it. I put in an electronic fuel pump on it and the float wont seem to seat gas just keeps flowing inthe carb through the overflowat the top of the carb. Is there to much pressure from this pump or do I have float issues? It worked at first then it was getting no gas now it wont stop getting gas is the float getting hung up on something. Anyone got any ideas?