This might be a dumb question, but I see people talking about this all the time. This is the first year i have owned my "own" boat so I'm just learning what should be done. Now I have snowmobiled for 20 years and have never heard of anyone "de-carbing" their sled engine. A 2 stroke is a 2 stroke??? I have taken my sled engines apart after 5 years of running and carbon is never a factor. Is it because outboards operate between 3-5000 rpm where a sled is a lot higher??? Just curious. Please educate me.