Black oil leaking out of a Nissan 9.9 2 Stroke

[DK in Chicago]

I'm guessing this is not good, but don't know what the problem is or if it is fixable.

When I opened the plug to change the lower unit oil this spring What came out was basically orange water. This was stored in a friends unheated garage in Chicago so it went through a decent winter last year.

One other note, it didn't look like this at the start of the season, only after I ran it.

Once I got new lower unit oil in there I ran it for about 30ish minutes up the river and back. The next time I went to take it out, it had this oil slick. So I wiped it and went to fill the lower unit again but it was still pretty good.

I took it out again for about 30ish minutes and it ran like a champ, but the next time I looked at it I saw it again and that's when I took these pictures.

Thanks for any advice in advance. I love this motor and can't afford to screw it up any more than it is.... HELP!!!!!! ;-)

DK

 

[TOHATSU GURU]

Re: Black oil leaking out of a Nissan 9.9 2 Stroke

That looks like unburned fuel/oil rather than a lower unit leak. Check your lower unit after the next couple of times you go out. As long as the oil in it isn't grey your okay.

 

[DK in Chicago]

Re: Black oil leaking out of a Nissan 9.9 2 Stroke

What color should it be, black?

 

[TOHATSU GURU]

Re: Black oil leaking out of a Nissan 9.9 2 Stroke

Gear oil should be the color of the gear oil that you put in....Usually it's amber, but some brands are clear and at least one I have seen was red.