I was looking at my new Nothern Tool cat. I got in the mail the other day and I saw where Honda was making an 11hp motor with a 6:1 gear reduction and some others had 3:1, etc. Think the application is for cemet mixers and such. Seems like you could make that little sucker turn a big prop. Don't know how much they weigh but seems like that little 11hp would make a cool little power plant.