not really, kholer 12hb yields a varieity of types some petrol some diesel.
some of the petrols have a swinging magnets in the flywheel type ignition...
If hes using one of the petrols that have that, it wouldnt take a clever man much to get say 3 or 4 trailer brake magnets put them inside the flywheel where the magnet goes past, wire em up to an alternator rectifyier pack and then a voltage regulator and... hey now you dont need an alternator you just made a dynamo (well technically its a generator cause the output would be rectified DC and its self exciting)
some have this already setup... check this vid.
Kohler 12hp engine teardown. - YouTube

