I have a 1986 15 hp Evinrude that I bought and it starts and idles fine, I haven't tried in on the lake yet,but in a 30 gallon barrel, it seems like it smokes more than usual, but I'm not used to running in barrels so was wondering if being confined just appears to smoke more from exhaust? I'm using 50/1 oil with 87 gas. Water pump and pee hole is pumping fine, head doesn't get hot to touch, It really starts smoking once in gear and revved up. Just don't want to damage anything if there's a chance for a problem. Many thanks, Knobby