Hey, thanks guys!
I appreciate the quick response.
And the link, Bama, thanks!! That clears up alot!
I bought it with 'no spark'.
The tractor had a 12 volt hooked up to it.
I knew it was a 6 volt, but didn't know it was a positive ground system.
The coil and generator have checked out OK, but the regulator is fried.
Thanks again