I am fixing to buy a used outboard for my Bass Tracker III. I have came across a 1993 Johnson 50hp that's power head has been freshly rebuilt by reputable certified marine mechanic. He had it bored .030 and installed all new bearings, seals, gaskets and pistons and it runs great. I also have a 1979 Johnson 70hp that has never been rebuilt but does run very well as well. Now my question to you all is this. Which engine would be best to go with? I am not worried about speed. I want a reliable engine. Would you go with a rebuilt engine or an engine that is older and has never been torn apart besides maintenance. I plan to keep the engine for a long time. Do you think I would run into a problem with obsolete parts on the 1979 engine any time soon? Thanks