I also have a Farmall 340, but will relate something on my Allis Chalmers CA. It was struggling under load (propelling me and it up grade on a tractor ride). I checked the flow, knowing old gas in the tank, a little water in the bowl, drained the bowl. Later it popped off a few times in the driveway then gave up. Looked like fuel in the bowl, but upon closer look, it was all water. Try fresh fuel. I peeked in my 340 tank and it has pitted rust, but not junk plugging the tank hole, well, there is the gauge float that obviously is no good. You may have already done so, but check the condition of the plugs. Not all plugs are created equal and fouled can give problems. Others more knowledgeable will chime in w/info also - great site this is. Tell me more 'bout your 340, lot's of 340 enthusiasts here, good luck and post back w/problems or solution you found to help others out.
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Today's Featured Article - Uncle Cecil's Super A Lives Again - by Mike Purcell. A week or so out of most of my childhood summers was often spent with my Uncle Cecil and Aunt Sissie in the small East Texas town of Maydelle on their 80 acre farm. Some of my fondest memories of these visits are those of learning to drive a tractor at the helm of Uncle Cecil’s 1948 Farmall Super A. Uncle Cecil was the second owner of this wonderful little tractor, but it was almost as though he had adopted an infant. The original owner was a man from Minnesota who bought her from a local dea
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