After cleaning and adding a gasket kit to the carb I noticed a fuel leak at the fuel pump cover. Gas appears to be coming through around the screw holding the cover. I've took apart and reassembled but issue remains. Could this be the result of a bad diaphram - even though it is new? 2nd screw down from top right. Leak occurs when pressurized by squeezing bulb or when engine runs. Not a major leak but noticeable. I've ordered a new OEM diaphram just in case this is the issue, as I don't see what else it could be. Thoughts appreciated - Thanks