So i bought this 86 bayliner capri with a 90hp Force Outboard 2 stroke recently. i repaired some cosmetics and whatnot. When i first bought it, I cleaned the carbs and replaced the fuel lines. Lake tested it for about 30-45 min, ran great. Finished my floor repairs and stuff and took it out last weekend , ran great, cruised around, top speed great, accelerates great. but after a couple hours , went in to the marina at idle and it started smokin and dyin. starts up everytime first crank but idles rough and smokes gotta give it a bit a gas just to keep it alive. WHAT DO I DO?!?