Thanks for your quick response and good ideas. The fuel does flow unrestricted when disconnected and even pours threw the carb depending on where the tank is mounted. I did check the filter screen in the walbro and found it clean. At the same time I checked the diaphragm and it looked good. As far as air leaks, I don’t think this is the problem, I have remounted the carb many times and I have a good gasket. I think you are on the right track with fuel delivery, I am not too clear on weather or not my tank is set up properly. I am including some pics, do you see anything wrong.