I have a 17'montaulk and am buying a newer engine. I had a 55hp johnson (too small). I would like to upgrade, but have only $4000. and not a penny more. This will buy me a new 1998 70hp nissan, a new 1998 75hp mariner, or a new 1998 tohatsu.... I don't know anyone who has field experience with these engines and the dealers keep blowing smoke up my rear. anyone have experience (good or bad) with these motors?