Bought my first old engine yesterday, it from everything i can tell is a 1924 1 1/2HP Dishpan Flywheel. I took a few things apart and cleaned them up, greased an oiled things, it is however missing the coil, but in getting ready to figure out something for a coil thought is would at least learn a little about how it is supposed to work. there is a wire from the battery box down to the timing control, i am assuming this to be a ground wire that would work similar to a set of points, the timing lever is there as well. i am hoping someone here could give me a little description of how that actually works. I was reading it with an Ohm Meter and turning the motor over but never could get a reading to ground?