Tractor Repair: 1954 NAA Stalls under load, sediment bowl, vent hole

Question
Tractor started stalling under load.(no fuel) Bleed drain screw on float bowl tractor starts right up. Gas tank clean. I tore carb down and cleaned it, replaced sediment bowl, cleaned air filter, %26 did complete tune up. Tractor still stalls. any help will be appreciated.
Thanks

Answer
Hello,

  Check the flow of fuel from the tank.  Even if the tank is clean, there might be a restriction in the fuel line.  The fuel should run full stream from the fuel line if you disconnect it fom the carburetor.  Make sure the fuel tank is venting properly and the vent hole is not plugged.