I have a Montgomery Ward shredder with a BS 130212-731-01 5.0hp engine. I have cleaned out the carb and the fuel tank. It seems as though the fuel pump is not functioning. If I fill the fuel tank up completely and tilt the shredder (toward the smaller intake/reserve container) it will start and run. As soon as I level off the machine it will not stay running unless I feed starter fluid in the carb neck. I have a new carb rebuild kit and fuel pickup tubes on order. I have also tried to make another diaphram out of a silicon sheet but still have no luck. Any guidance would be appreciated. Oh, and BTW when the carb was off I cleaned the screen on the intake valves and was able to spray carb cleaner through the inlet and see fluid come out the intake tube and visa versa.