Hey i'm not boat mechanic. Or a mechanic at all. But white smoke, overheating. In my experience thats a bad thing. But JimN is probably on to something. Run through his list and make sure to single everything out before you go selling it.
When I was a child, I used to talk as a child, think as a child, reason as a child; when I became a man, I put aside childish things.
1 Corinthians Chapter 13 - 11