I have a Honda 7.5 as well, bought used, cranks first or second pull everytime and purs like a kitten. There are some motors that are not meant to be put in salt water so do some research before you buy. I've owned a chrysler and evinrude in the past and really had no trouble with either. I think maintenance and proper use will give long life with most any of them.
1976 Chrysler 22 "CinJam"