[Leyland]

Hi, I'm new to the forum.

Friday night I purchased an immaculant condition 1989 Evinrude 6hp 2 stroke, it looks like new & starts first pull (tested in garbage pail with water when purchased). Upon getting home I put the motor on the stand, Sunday I noticed dark (black) oil leaking from the exhaust port just above the propeller. at first I didn't think anything of it but I don't recall my 9.9 ever leaking like this... a little water maybe but not oil. The previous owner said he just changed the oil last week & tried it out last saturday... (he was selling because it was too small for his new boat)

Any ideas???

[tx1961whaler]

Perfectly normal. It's unburned 2-stroke oil that gos out of the exhaust.

[crxess]

From the exhaust port it is likely excess unburnt oil from idling or running on muffs. Motor will not burn away all the oil under those conditions.

Should clear after a run. If not the top seal in the gear case for the down shaft could be leaking.

[Leyland]

I'll get it in the water & check it again after... The motor is very clean & probably only been in the water a couple of times so worst case, maybe that seal dried out!

Thanks for the help

[ShaneC]

Did you ever get out to the water? Just curious if you had futher problems!

I noticed last night after getting my 1974 20HP Merc running that is had this very dark oil leaking out between the propeller and lower unit where the two meet. I have just changed the foot oil and it has not even been in gear since the change. This oil didn't look like foot oil much too dark and a thick.

[Home Cookin']

I noticed black oil leaking from the lower unit/prop for the first time in 20 years on this motor. Then I had some black from the upper exhaust ports, and noticed a lot of black oil out the prop when I was having trouble starting. Figured I might be running too rich a mixture especially after reassurance from our friends on this forum that it was unburned oil and not a problem. They also pointed out, correctly, that lower unit oil will either be brown (clean) or milky/gray (water intrusion), and there is no crankcase oil like in a car.

Then the motor died at high speed; restarted once and died again. Mechanic found water in the cylinders, probably from a failed exhaust port baffle. It's beyond repair (1988 70hp Johnson). Makes me wonder, though, if those were signs, and if it were a newer motor, I should have taken it in rather than run it.

Thoughts from the experts?

[scottzfx]

Must be the day to find the unburnt oil. I just noticed the same thing on my '75 115. Thought it was a leaking seal. I just ran it on muffs yesterday to clear it and run out the gas when I got home and then tilted the motor up. When I put it down today, I saw the oil running down from between the prop and lower unit. It wasn't much and it was definitely black, not brown. Thanks for clearing that up!