Posted by Doug Stockman on February 28, 2010 at 13:21:17 from (70.100.157.170):
I have a 1940 Farmall A, crank start that is giving me problems. It used to start easily with just a few pulls, but over the past 6 months it has gotten more difficult to start. Many days, I cannot get it to start at all. I replaced the spark plugs about 30 hours ago and that may have helped slightly, but the starting problem has progressed. Another symptom occurs after about 20-30 minutes of use. Initially, there is no missing when the tractor is placed under a mild load, but after the 30 or so minutes, it sounds like all cylinders are not firing when engaging the clutch in 3rd gear. The missing can go away once the tractor is up to speed. There is of course a significant reduction in power when this happens. The missing gets worse the longer the tractor is used to the point where I fear the tractor will stall and then of course not re-start.
Can any of you engine experts give this novice some guidance on where to start looking to identify and then solve the problem. This tractor has served me well over the past 10 years and I want to keep her going.
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Today's Featured Article - Converting from 6 Volt to 12 Volt - by Chris Pratt. It's a common problem for old machines especially when the weather starts to dip below 40 and the tractor isn't fired up as often. You are probably used to the 12 volt Diehard, charged with 200 amp alternator of your 3/4 ton that always is ready and always starts. It's this type of experience that brings about the many queries we get for 12-volt conversion kits. Since only a few kits are available (we sell kits for the
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