I have a 1997 90hp Evinrude 2 stroke 13 spline drive on a 17 ft half cabin fibergl***. I am unsure what size and pitch the original prop was. I need advice on what prop will give me the ultimate fuel economy as i do longer trips to reef, without loosing to much speed or holeshot. Could you recommend what size and pitch best for economy and what prop do you recommend I buy. Thank you.