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Sludge from bottom of prop

Post By: wingman13      Posted: 10/11/2022 10:24:34 PM     Points: 285    
So when I went in the garage tonight after a morning of fishing, I noticed a large amount of "sludge" coming from the bottom of my prop. After some research, this article makes the most sense, since the gas I had in the tank was pretty old & I haven't run the motor since mid July.
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Do you guys think its just an old gas issue, or is it a bigger problem??

Also, the oil on the board isn't from this situation, wish I took a pic of the sludge before I cleaned it up.
 Reply by: Eyefishing      Posted: 10/12/2022 7:32:14 AM     Points: 5539
you might want to check the lower unit to see how much oil is in it. you might have a main seal leak.
 Reply by: Hawaiian Punch      Posted: 10/12/2022 9:48:07 PM     Points: 11376
Fuel/oil mix from July should not cause that.Lower unit gear lube would be my first suspect.
 Reply by: Hawaiian Punch      Posted: 10/13/2022 8:06:03 AM     Points: 11376
Pull the prop off and have a "look/see" . . .if you find fishing line behind the prop,theres a good chance the seal between the prop shaft and lower unit has been breached.Drain the lower unit into a clear jar and allow it to sit over night.You will see the water and gear lube seperate . . .time to have the lower unit resealed.
 Reply by: richw88      Posted: 10/13/2022 9:52:45 AM     Points: 63
I agree 100% with H Punch. Some 2-stroke outboards exhaust through the prop and some oil is normal, but if you haven't seen it before, it's very likely a seal gone bad or cut by some guy's discarded line.
Drain the lower unit even if you can't repair it right away. If oil comes out, water can get in and freeze over winter.
 Reply by: wingman13      Posted: 10/13/2022 1:40:06 PM     Points: 285
Well the good news is when I took the prop off there was no line or anything on the shaft. I switched out the oil in the lower unit, filled the tank with new gas. (gas was actually still from last season) Hoping to get it out to Chatty this afternoon for a quick spin, to see how it does.

Thanks for the responses
 Reply by: Hawaiian Punch      Posted: 10/13/2022 2:49:47 PM     Points: 11376
Did you get a long/close look at what drained out? If its milky or foamy or has water in it . . . .you got lower unit seal problems. If its good old fashion gear lub oil . . .you are ok . . .by the way . . .do you know how to fill a lower unit?
go to youtube and watch a few videos . . .learn how to fill from the bottom . up. .no air bubbles to try to burp.
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