About the gas engines needed The 66CC i used came from a Husquavarna Forest cutting machine.
8' boat was a fast tugboat at full power.

Now has a full sized marine # 24 deep cycle battery--Novak Super Rooster with reversing and the 41# trolling motor. It pulls 12volts at 80 amps from a full power start. It can pull a unready adult into the water head first from a dock.

I know.