I'm hoping this motor will do the job of replacing a 1960 18 hp Evinrude. I have a 14ft V-bottom. What prop would be best suited for this 15 hp Yamaha? It's a 1997 model. Available are 9 1/4 or 9 3/4 diameter props. The pitch on the broken prop is 9. I have found the ones on here, on sale, which are three ears and a single-fin design. I can also get a double-fin design. Will either of these props be better at getting on plane while having low-end pull, with duck hunting gear in tow? I thought about getting a pitch of 10 1/5, but not sure if the 9 3/4 diameter will fit the motor. Thanks for advice, in advance. ~Mike