I am the proud owner of a 1939 Ford 9N tractor that I have been using to mow my 5 acres for the last 8 years. Problem is that it is in need of repair and I am having difficulty finding a mechanic that will work on these old tractors. I live in Vacaville, Ca. Does anyone have any information on a Mechanic in this vicinity? It runs briefly (20 seconds) and then shuts down. I have replaced the the following: Carburetor, spark plugs and wires, points, condenser, coil, battery cables. I have also cleaned the air filter. After sitting for 20 minutes, I can start it, but then after a few seconds it shuts down again. Would the resistor block or cutout relay have anything to do with the engine shutting down? Any information would be appreciated.