04-03-2007, 01:44 PM
I have a 1998 2-stroke 8HP Mercury kicker and its messy too. I've talked to some mechanics and a buddy that has the same engine. The discharge is unused oil being expelled from the exhaust. This is the norm especially if its jetted for lower elevation and your running at higher elevations. Not a lot you can do except re-jet or replace it with a new, cleaner, 4-stroke. My kicker still runs great. I'm content for now, and keep a rag handy to clean the discharge. Playing with the oil concentrations could possibly due more harm than good (if you get it wrong anyways). Good luck.
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