I posted this question in another section and i just relized that there was a prop section already. Sorry guys. I have a 91 17.5 aquasport with a 89 110hp evinrude on the back. my problem is, i bought the boat as a fixer upper and it didnt have a prop. now its time to put it in the water to test run it and i have no idea what prop size to buy. A search of my boat came up with a dry weight of 1850lbs with a 90hp on it. I just need a starting off prop. any help would be great. thanks!