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Message Subject: Black sludge coming out of prop exhaust

muskyhunter34

Posted 7/27/2013 1:16 PM (#653916)
Subject: Black sludge coming out of prop exhaust

Posts: 294

Location: New Jersey

9.9 johnson 4 stroke, been sitting idle for a month, I start It at least once a week.

Today, I started it and noticed black stuff coming out of the prop exhaust with the water from the hose.

Engine seems to be running fine, I was just wondering what this is? concern??

thanks, rob

Northwind Mark

Posted 7/27/2013 1:41 PM (#653920 - in reply to #653916)
Subject: RE: Black sludge coming out of prop exhaust

Posts: 566

Location: Elgin, IL

Rob, I don't think it's anything serious. I had a Johnson 60hp tiller (injected) that used to do that, especially after start-up from winter storage. I assumed it was fogging oil.

That motor ran great, never a problem. But, occasionally I had to wipe that stuff from the skeg.

VMS

Posted 7/27/2013 1:58 PM (#653923 - in reply to #653916)
Subject: Re: Black sludge coming out of prop exhaust

Posts: 3514

Location: Elk River, Minnesota

Hiya,

Nothing to be worried about at all... It is just exhuast build up that has built up and is now draining out... totally normal...

Steve

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