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 - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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