88 Johnson SPL - lower unit oil color

savenelroy

Recruit
Joined
Nov 2, 2021
Messages
4
Just replaced the lower unit oil on my 1989 Johnson 88 SPL. Is this what used oil should look like? It's my second year owning a boat, and after the first season, it was milky and green. I brought it in and had the seals replaced. I used it all season but don't have anything else to compare this to other than images from a Google search. Everything I'm seeing looks a lot darker than this.

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tphoyt

Lieutenant
Joined
Jun 10, 2010
Messages
1,477
Looks ok
Be sure to replace the nylon washers with new ones.
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,103
That's NOT right, it shows it has water in it.
Drop the lower unit and then do a pressure test.
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
38,674
Motor just ran just before draining?----Then it looks like air in the oil.-----Tiny bubbles= no troubles !
 

iggyw1

Ensign
Joined
Oct 24, 2011
Messages
954
I will be draining mine tomorrow morning, and I am hoping mine is looking that good when it comes out!!!
 

oldboat1

Fleet Admiral
Joined
Apr 3, 2002
Messages
9,612
I will be draining mine tomorrow morning, and I am hoping mine is looking that good when it comes out!!!
Moot point, as you will be refilling with clean oil anyway, and maybe doing pressure and vacuum tests as a precaution.
 

savenelroy

Recruit
Joined
Nov 2, 2021
Messages
4
Motor just ran just before draining?----Then it looks like air in the oil.-----Tiny bubbles= no troubles !
Yes. I ran it for 5 minutes to warm up the oil so it would drain out better. Starting to get cold here on the east coast.
 

havoc_squad

Senior Chief Petty Officer
Joined
Mar 5, 2011
Messages
739
Yes. I ran it for 5 minutes to warm up the oil so it would drain out better. Starting to get cold here on the east coast.
No need, this is not a motor oil change.

Put a jar to capture it under it with drip pan. Take out the vent and drain plug, go take a short nap or eat and then come back.

I never check/drain the lower unit lube condition afterwards on the same day it is ran. It's a good way to kneejerk worry about a problem that may not exist.

As racer said, the air bubbles/foam can occur. Those bubbles may get mistaken for water intrusion.

The only exception to not checking the same day will be is if there is a suspected/possible water intrusion, suspected loss of lube level, or checking the condition during freezing periods of the year.
 
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