Iv thought about this aswell. Im not a boat person but if i were id build one for sure. Also you cant really go by hp because of the slow rpm. Torque is what counts. Sitting down you get alot less but standing up a 150lb person makes something like 80ft/lbs to the crank. It would be nice to retain a gearset aswell for upstream and downstream.

Love that at bot bumps a 9 year old thread, and we carry on the conversation like it was yesterday. :D

And just about everyone is still active. Its interesting so why not. Im sure there are new boats on the market by now