I have a mercruiser 120, and a 140, 1983, and 1985. Both run excellent, changed them over to electronic ign when I got them. No idea on the hours on either, both had several owners before I got them. The 140 had the core plugs blown out, but nothing was wrong otherwise. I should check compression, but I don't see the need, they do not use a drop of oil, and now as the owner they get regular maintenance. A motor will last a long time if it's taken care of.