Posted by d sellers on September 20, 2014 at 06:50:36 from (216.47.200.69):
I have a '61 ford 2000 4 cyl gas that I bushhog with, been using all summer with zero problems. Was using it recently and it stopped running, just like it had been turned off with the key. I suspected a loose or disconnected wire. All wiring was in place, so I pulled the coil secondary wire to the dist cap out of the coil appr 1/2 inch to see if I had spark. To my surprise the engine started and ran fine. I thought I had found the problem, dirty/bad connection. However, upon pushing the secondary wire back in the coil, the engine died. Will only run with coil wire out about 1/2 inch. Good blue spark is jumping from coil to end of wire, but will not run when inserted. This tractor has a 12v system, coil primary resistance appr 3-4 ohms, no ballast res. used. Dist.cap appr 1 yr old, new points. Is it time for some new wires? Tried troubleshooting with known good coil and wire from 641 and engine would not fire. I thought I had a basic understanding of ignition systems on these old tractors (mostly learned from reading on this site) but I don't understand whats going on with this one. Thanks D sellers
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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