Well, I can't find marine exhaust anymore. I have an OMC 460 from 1989 that's bored out 0.060. I had that done in about '05. So, anyone have an idea what I should do? I am the original owner. It got some water in it, but we had that taken care of and it has mystery oil in it. My buddy says it needs to be "gone through". I guess that's mechanic talk for it probably needs to be opened up. Before it got wet, it was running as well as ever. Lot's of power and sounded great. Anyway...I'm not much of a motor guy, so any advice would help.