Also decided to build a boat and power it with an electric motor, so I finished it and put it in the swimming pool to check things out and I couldn't get it to turn left so I have made some modifications and since doing it I haven't tried it again.  Harley, our little Yorkie seems to be a little intimidated here, probably because he's not too crazy about getting in the water.  This boat is 4' long and 17" wide and the motor I have in it I planned on using 10 A123 Cells for 36 volts so I think it should move out if I can correct the turning problem.  I have no experience with boats so it's all experimentation on my part.