Took my 22' SeaArk to Valdez this past weekend. Have an Yamaha 80 Jet. Bought the boat new last year. I have a couple of questions, I have not done any research yet, but know this is "THE" place to go for good info. I seemed to always be picking up sea vegetation down there and it had a major effect on my motors performance. Do you know how much new/used lower prop units run (ballpark) and how hard are they to swap out? Is it something you can do in your garage or do you need special tools etc...Thanks in advance!