I had a similar problem with mine (56 with 235) and I thought the fuel was coming from between the top of the bowl and the cap at the front of the carb. I also rechecked the float level, and also put some thread tape on the adapter that threads into the carb that then accepts the fuel line (I did not tape the fuel line, should not need to). Though I am not sure, I believe that that was where my leak was coming from. Any way, no more leak. Be carefull tightening down the top screws too much, you may end up putting a bend in your top plate. If it is nice and flat, then just snug should be enough.
Lee.
