Posted by MarkinOhio on August 27, 2012 at 07:13:44 from (206.211.222.52):
For the last several months my "49 Farmall H would absolutely refuse to restart after being shut down hot. Let it sit a couple of hours and it"d start right back up and run good. Plenty of fuel and wet spark plugs but no spark. All the usual tune up items done including 4 new 3116 Autolite spark plugs, new copper core spark plug wires, new points and condenser, new rotor and cap, even a brand new coil. (The old one was date stamped 3/49) Still no spark out of the coil wire when hot. I removed the coil cover and checked continutity between the little spring tab that contacts the coil output and sends it out to the center hole of the distributor cap. Zero ohms so I figured it was good. Installed it back on the mag and it started just fine. After about 45 minutes run time I shut it off and it wouldn"t restart. Once again I pulled the coil cover off and it checked good again with the ohm meter. In desperation I had my wife hit the starter button while I held the end of the coil wire directly on to the coil output with the coil cover removed. The engine started instantly. The only thing that I can figure out is in the 5 minutes or so it took to remove the coil cover and take it into the shop to check it out it cooled off enough to remake continutity and after running for long enough to get hot it would open up again. Anyway, with a new coil cover installed I ran it for 6 hours yesterday with several shutdowns and hot restarts with absolutely no problems. Sorry for the long post but I thought it might help someone else out someday.
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