85 120hp E’rude Leaking behind prop!!!

Luna Sea

Lieutenant Junior Grade
Joined
May 20, 2002
Messages
1,069
Sure ain’t having the fun summer I had last year, just got the boat running last weekend. Now, after flushing it in the barrel, I look down by the prop and there’s this oily substance leaking down the aft section of the skeg. I changed the gear lube last night and there was just a tad (maybe a couple of drops of water’s worth) of milky color on the surface of my drain bucket, think I remember seeing this last time, and hearing something about condensation, ect. Other that that, the Quicksilver gear lube looked ok. Took the prop off, and there was a little black oily substance in there. I did a “search” yesterday and found a post from Oshi back in Febuary in which Outboard Jim replied:<br /><br /> “If it’s dark black, it’s probably coming from the exaust and nothing to worry about” <br /><br />Can anyone elaborate on this statement? This black “stuff” was hard to wipe off, and was kind of greasy. I tried dipping a finger in each substance and seeing if the dark black stuff “smelled” like the gear lube. It didn’t, but I’m no expert.<br /><br />Also, carbs have recently been rebuilt, VRO has been disconnected, and “used prop” (don’t look so hot) was put on by mechanic. <br /><br />Could there be a rich or lean condition doing this? Is an out of balance prop damaging the seal?<br /><br />I looked in Clymers last night, still have OEM manual to read, but they show how to pull everything apart, can just the prop seals be replaced? Looks like I need another specialty puller, any tips for my next possible project? Thanks for looking……….
 

Spidybot

Lieutenant Commander
Joined
Apr 4, 2002
Messages
1,734
Re: 85 120hp E’rude Leaking behind prop!!!

If you have clean, bluish gear oil in the gearcase and the oil coming out is black, it is most likely not from the gearcase at all.<br /><br />Exhaust fumes contain residues from burning the oil in the combustion chamber. This black stuff mixed with a little excess oil would make it's way via the exhaust to the prop hub and drible out between the gearcase and the prop.
 

Luna Sea

Lieutenant Junior Grade
Joined
May 20, 2002
Messages
1,069
Re: 85 120hp E’rude Leaking behind prop!!!

Thanks UU,<br /><br />It is definately black. And does smell different. Haven't "tasted" it yet though. :D <br />Just spooking me cause first time it's happened and carbs were just rebuilt, timer base just replaced, so looking for lean/rich symptoms ect.<br />Thanks for the reply! :)
 

93bronco

Ensign
Joined
Nov 11, 2001
Messages
962
Re: 85 120hp E’rude Leaking behind prop!!!

its burnt excess oil. when my powerpac was going bad & firing whenever it wanted - i got the black goo.<br /> after powerpac was replaced no more goo.<br />-<br />yours could be something else, but i would look at the ignition to make sure it isnt breaking down.<br />- <br />if you are premixing excess oil will do the same thing.
 

Luna Sea

Lieutenant Junior Grade
Joined
May 20, 2002
Messages
1,069
Re: 85 120hp E’rude Leaking behind prop!!!

2K<br /><br />Think you hit it! I hope! This was the first extended use without the VRO. And while I don't think I'm putting too much oil in there, I'm sure the 50:1 constant is more than it's used too with the VRO. Thank you much! :D <br /><br />Power pack, stator and timing base are new so I sure hope the ignition's up to par! :rolleyes:
 

Spidybot

Lieutenant Commander
Joined
Apr 4, 2002
Messages
1,734
Re: 85 120hp E’rude Leaking behind prop!!!

Yep, right! 50:1 is an average correct mix. At certain rpm it is too rich. That would be why you get it 'excess' and ofcourse it brings the residues with out.
 
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