Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Measure voltage from the stator to the voltage regulator, with regulator unplugged and running full speed. Reading has to be above 28 volts AC ..If it is the regulator output needs to checked and should produce at least 14 volts DC from rectifier. Usually stator will test ok, and it turns out to e the regulator/rectifier/
I see question is still open, did you get to check the charging system?