I think Steve has you covered, Joe. I would check the float level and the needle and seat of the carb for problems. If you replace the needle and/or seat with an all brass needle, take a plastic or leather mallet and give the needle a couple of light taps while it is seated on the seat. This makes the needle and seat conform to each other and gives a good seal. This is not required vor a Viton tipped needle (black, rubber like tip on the needle).