Posted by Bob N.Y. on November 23, 2021 at 14:06:20 from (154.27.215.209):
I am still working on the 1930 Model A Ford doodlebug that I am trying to resurrect after it sat outside in the elements for 20 years. I did some preliminary checks today in hopes of trying to start the engine tomorrow. I think there is a problem with the spark. It was originally a 6 volt positive ground system, but was converted to 12 volt negative ground before I ever saw it. I am staying with the 12 volt negative ground. Question 1: With the key on but engine not running, should the voltage on the distributor side of the coil be the same as the battery side? Question 2: If the voltage on the dist. side is considerably lower than the batt. side, does that mean the coil is hooked up backwards? Question 3: Is there a difference between a coil designed for positive ground and one designed for negative ground? Thank you.
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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