Earlier this season my 1977 70 hp died slowly at 3/4 throttle and near locked up. I just finished disassembly and I found what I had suspected that the rod bearing on #2 (center) had dissintegrated. I could not tell needle from cage. The crank is scored at that journal to boot. #1 and #3 are fine. I am happy that the rod cap held and did not let the rod damage the block. I am not sure why this happened but I suspect a lean mixture or no fuel from #2 carb was the problem. I would like to rebuild the engine. I probably will need a new crank, The block has no deep scores and looks like reboring will clean things up. My machinist will let me know. There are a couple of other issues that concern me It looks like a piece of spark plug electorde got to bouncing between the top of the #2 piston and the head pitting the head. I can clean this up but can I re use the head or do I need to try to find a good used head? What are a good used head and crank going for these days? I am trying to put together a budget for the rebuild. I have a well equipped shop and enjoy the rebuilding process as much as I enjoy being out on the water. At leas when I'm done I know what I have.
Thanks
Tony
Thanks
Tony