I recently came across a 1989 70 hp Mercury engine serial OC137125. The motor was on it's side when I got it, and looked as if some of the lower unit fluid had leaked out around the water pump area. I got it upright and there was no fluid in the lower unit. The plug did have a very small amouth of metal on it. I removed the lower unit and it looks to have been leaking some oil around it. The drive shaft turns smoothly after I filled the lower unit, but makes a little more noise than I think it should. I am afraid that water had gotten into the lower unit, and it could be permently damaged. I would pull it all apart, but don't have the proper tools to do this job. What are my options?
