Good for about 6 watts into 12 volts at about 200 RPM, 12 watts into 24V at about 400 RPM.
Not a lot of power. But with steady wind it would bring an 85 amp-hour battery from 80% discharged to full in about a week.
I had a boat that used such a battery for running lights and the like, which got used mostly on weekends, and ran after dark or anchored out with an anchor-light on, and used the VHF radio, often enough to use a lot more than leakage current. Came with no charging system at all.
Rather than hook up the charging circuit from the auxiliary outboard, provide a shore power charger or clip one on, or what-have-you, I used a little solar panel with about half that output, and a little regulator to prevent overcharge. Never had a problem with dead battery over the several years we had the boat.
A little wind genny based on that motor (maybe put up when the boat was put away for the week, stowed below decks when under weigh) would have done just as well.
It won't power your house. But such a "toy" mill should have plenty of uses nontheless.
