Lower unit oil

[power dive]

Ok guys I drained my lower unit oil on my kicker and big motor and let the oil sit for a day in jugs this is what I have milky color on the bottom of both jugs you think bad seals in both motors?

Edited November 26, 2015 by power dive

[power dive]

[muskiedreams]

Yes. Also need to make sure shafts are ok.

[lost a lure]

I have never let it sit in a clear container. What did it look like when you first drained it?

[power dive]

Green mixed with some milky as it was coming out

[MCF]

It is likely that you have a seal issue. In another couple days, the oil and water will further separate. These motors should have the props pulled to see if there is fishing line that damaged the outer seal. Also they need to be pressure tested to make sure that you don't have bad gaskets on the two screws and to define that there is a seal issue. Significant water would have gushed when the bottom screw was pulled, if the boat has been sitting for a while since it was last used.

[rolmops]

It does not look like very much water at all. dependent on how long ago these lower units were last changed,it may just be condens water. It may even be left over gunk from previous oil changes that used a different color and 90 weight oil. I would let it sit a few more days and if it does not seperate anymore it probably is not water but a different older oil.

[power dive]

Ok thanks guys

[jimski2]

The test should be pressure and vacuum checks. A test pump is available for these checks.

[lineman49]

Mine looked like coffee with cream, seals are being replaced.

[LongLine]

Coffee with cream is a lot of water & probably prop seal.  Green with streaks of white may be condensation or the fill screw & gasket wasn't seated properly.  At least that's what I ran into with my little merc & bigger envinrude.

 

Tom B.

(LongLine)

[lost a lure]

How would you get condensation inside a sealed unit?

[rolmops]

The molecular sizes of O2 and H2 is smaller than H2O molecules. This means that what is "sealed" for H2O may still be just barely open for O2 and H2. H can also easily transfer from oil to O2

Edited December 4, 2015 by rolmops

[lost a lure]

OH that's what I thought I think

[Xxx]

Is that like the square key don't fit in the trunk and the round key don't go in the ignition???

[TileMan Dan]

showing your age Pap!!! LOL

[Xxx]

Yea Dan your right, I forgot now they have remotes and a number pads. That was a George Carlin joke, let me explain the car son, the round key ya,ya, you know the rest LOL. TGIF!!!

[BottomDollar]

Very late reply, but an oil pump tube securely connected to the drained lower unit and a mityvac will tell you if it holds pressure. A spray bottle with soapy water will show where the leak is if one exists: