Ok,So a family member gave me a pontoon baot that has the Evinrude 70hp on it and it had sit untouch for about a year until I got it.We took it to the lake and it ran fine with just a little sputtering which I assumed was because it had sit for awhile.Well I took it out the other day to see if cleaning the carbs made a difference and it was running the same as before but got worse but never quit running,although you had to choke it evertime to start it.Well this morning I was checking to see if it had fire when I noticed as you turn it over there was mist coming out of the 3rd cylinder(bottom cylinder).What would cause this?BTW,I do not know anything about outboard engines.and.i read somewhere that it will rust and i need to fog it,whats that?Thanks so much for your help.