Posted by Bryan Monaco on April 30, 2008 at 17:17:39 from (98.224.207.62):
I recently bought a 1947 Farmall A. This is my first tractor so I don't know much about them.
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.
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