I conducted a generator test according to the youtube video, and it does spin. I tested the voltage regulator with an ohm meter, and it grounds out on armature and field, so I thought it was bad and ordered a new voltage regulator and tested it the same way and grounded out the same. I installed the new regulator, polarized it before starting, hooked up, started, checked voltage, and the reading indicates 6 volts. I disconnected battery while running and the tractor turned off. Shouldn"t the tractor still run if the generator is working? Any ideas why its not increasing on the volt meter from 6 to maybe 7.5?