I have a 1996 princecraft 115hp 17 foot 6, my dad has a 2011alumina craft 115hp 17ft 6 as well. We both have 12volt 55lb thrust minn kota trolling motors. The trolling motors work fine for smaller inland lakes. However we are looking for something more powerful to control our boats on larger bodies of water and rivers such as the fox wolf and wisconsin. What do you guys suggest? 24volt ? What thrusts? Please help Thanks eric