I had a 1982 Evinrude 115 hp on my boat but the motor was old and giving me to much trouble now i am in the market for a newer model engine for my boat would it be best to stick with a 20 inch shaft or move to a bigger on? I am not really sure what the difference is and would like to know if anyone had any good idea of an ideal motor for my boat. I have read through many forums and none i could find matched my topic i would like to look for a motor that is at least a 1996 or newer and i heard that force outboards were really the only motors i should stray away from. any help would be great. Thanks alot