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Black sludge out of my Mercury 25 2-stroke 1995

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kole115
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Joined:	Wed Nov 5th, 2008
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Posted: Wed Nov 5th, 2008 08:20 am

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After flushing my motor and leaving it to sit to drain out, there is a black, tar-like sludge that oozes out of the exhaust with a carbon like smell. I use standard 50:1 ratio, NGK BP 8H N-10 plugs. It'll happen if I troll for a few hours or even if I just run it after 10 minutes with the hose. is this normal?

synoil
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Posted: Sun Nov 16th, 2008 01:33 am

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Probably somwhat normal. I would try some Amsoil 100-1

synthetic 2cycle oil. Engine will run cleaner, less smoke, less

plug fouling and it will clean out your exhaust ports with continued

use. I am assuming you are pre-mixing and don't have a oil

injector system. Just run it at 100-1 and it will do fine. I use it

in my Mercs that I premix the oil gas

Craig

kole115
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Posted: Mon Nov 17th, 2008 07:14 am

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Thanks for the tip Craig. I'll try that!

Aloha.......Bobby

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