Im looking at a 1983 100 hp 6 cylinder outboard. It has tilt/trim but hasnt been run in a year but came off a running boat. What do I need to know a mercs that is different from johnson/evinrude. I have always been told to stay away from mercury esp. the older ones. I just want to get the inside scoop from people that run mercs. Any insight would be helpful. Also how much would a motor like this go for?