I GUESS...
I don`t know the model number, it is on a Bob Cat ZTR mower, no alternator that I have seen. I was told it charges from stator.
It will run fine without the regulator plugged in, it shows 6.75 volts on the wire coming from underneath the magneto when the wire is unplugged, with the regulator plugged in it shows 18 volts at the battery terminals when tester is ground to ground and positive to positive.
I will get the model number and any other number I can find and list it,
This is my first time on the site and I do ask for forgiveness for my lack of information.
Thanks for your time and help.