I have a 17 foot G-3 V170-T. It's the deep V model which requires more umpt to push it. I have the 55# AP motor on it, and it's adequate, but in strong winds or current could use more power. I too have no place for another battery, so for now I just live with the motor I have. Going from a 46# to a 55# is almost 20% more power, if your boat is a Mod-V or flat bottom it may get you by. I get 2 mph with my 55# with no wind or current.