Friend wants to sell what turns out is a 1968 Evinrude 55, model 55873R for a good price. He's had it for a few years and never had a boat that he used it on-he's always had i/o's like I used to. He did have it on a stand last fall running and looked to be working properly. Its always been fogged and oiled down. It turns over, has good compression, the carbs are cleaned and working properly, but there currently is no spark. Did some checking and looks like it needs a new amplifier after not getting a reading with the ohmmeter from it. Question is they still sell new amplifiers for this year model (it isn't cheap) but what about other wear parts for something this old? Are they still made and available? I'm thinking if I can get a few summers of boating out of this old o/b I will be happy. Am I asking for more parts chasing headaches than its worth?