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1996 Mariner 25HP dripping dark oil from propeller shaft after 5 minutes flush kit run

Dark sticky mess,more than likely oily exhaust unburnt oil,normal.When engine is running it heats up and runs,exhaust gunge that is.
 
Exhaust grunge for sure. The gas looks to be dosed heavy with 2 cycle oil. Lower unit grease looks OK, not milky, and smells lots stronger :). I'll change the gear oil anyway. Thanks!
 
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