Had a lot of problems this year with this engine. I had it tuned up, water pump replaced, and the carb rebuilt before the season. Once in the water I had problems starting it and keeping it going. I brought it back to the place I had it repaired. They told me that I had water in my gas tank that got into the carb. They cleaned out he carb and dumped the fuel out of the tank. I replaced the fuel. When I start the engine now the engine idles rough. Any suggestions?