1994 Johnson 50hp- runs perfect, very strong and smooth. Has never been a problem motor at all- hit the key, fires right up and runs great. BUT, it constantly gets this thick, black, gooey oil running down the front of lower unit. It isn't unburned fuel- the carbs are clean and don't leak. It looks like burned fuel/exhaust to me. Maybe a leak from the exhaust chamber? Is there a tube there that can break? It doesn't cause any problesm, just looks bad. I had both covers off this engine this spring when I did a major clean-up on it and got it sparkling. Could not pinpoint the source then so I figured it must be from under the powerhead. Thus, I figured exhaust. Any ideas?<br /><br />UFM82
