I am shopping for an used motor for my 14' jon boat. It is an older, deep and wide (48") Polarcraft. I use it on local lakes and a small river with some current. I am considering either a 6hp or 8 hp motor. I am not sure which way to go. I usually take the motor off and store it when not in use, so I don't want it too heavy to carry and I am leaning towards the 6hp. However, if there is a real reason to have the bigger engine, I need to know that. Is there much difference in weight? Any opinions are welcome. thanks.