1947 Farmall A possible fuel system problem?

The tractor starts and runs great for a while. It will sit and idle all day, but after driving it a short bit it begins to sputter,jerk, and miss. It will die, like it runs out of gas. It will start right back up again and do the same thing after a few minutes. Just before this happens You can increase the throttle and nothing happens.It happens in any gear. Today I drove it and it was cold and was great. Then it crapped out when it got hot. It started again and ran great for a while then it died. Later it didn't run well cold, but would run hot. There is plenty of fuel in the sediment jar. I took the carb apart and blew it out, but the same thing happens. I think that it may not be getting enough fuel in the carb. When I remove the line from the carb and I turn on the gas how much should pour out? I get a heavy drip that will fill a shot glass in about a minute. Is that enough? I would think it should be a faster flow.

This sounds like a fuel system problem to me. I sprayed carb spay around areas of possible leaks while running and there was no increase or decrease in RPM. I would think if there was an ignition problem it would be more often than sometimes. However, as a automobile technician I have never worked on a magneto before. I also have never worked with an updraft carb before.

Does anyone have any ideas?

I will take a look for something getting stuck in there, like that bean. I have seen screens on automotivegas tank fuel pumps get clogged with debris and when the car (pump) shuts off it falls off.