I just bought my first boat, a Sea Ray 175 Sport with 30 hours. I have boated with friends, but ownership seems a tad daunting. I joined this site to learn as much as I can and appreciated the experience of you all. My first concern is running in saltwater. I have the boat at a marina, so they should be flushing my motor each time I bring her home. Is there anything, in particular, I should know about the 3.0 Mercruiser?