Hello,<br />I have a 1966 60hp johnson. It's working fine and enjoying the summer. My question is this, I pull the boat into my back yard after running it and the next morning there is a small amount of dark oil on the ground. It appears to be coming from the top of the cavitation plate. Is this unburnt fuel/oil mix?? Should I be concerned about it??<br />Thanks a lot<br />Mike and son Zach, digging it 