I have a late 60's Kohler with ford flat head 4 cylinder. The TR transformer burnt up mid journey in FEB. #245360. Just replaced it yesterday but unable to get voltage. I hooked 12v up to f1/f2 running and not running no change. Tried spinning a grinder backwards while running, no change. from L1 to L2 reading nothing. from L1 to A1 35 volts. from L2 to A1 reading 70 volts. R2 resistor looks like it got hot. It seems fine all operations but production. Anyone good with these old units. see attached drawings