Hey Guys, My Brother in Law has a 1997 Johnson 150 Ocean Runner. He hasn't run it this season. He started it yesterday and it started right up. We splashed it and again it started right up. Problem is it only ran for a few minutes then it started blowing white smoke. It was also putting gas and oil mix out of the exhaust. He checked the owners manual and did all the troubleshooting things that they suggested. Still had the same problem. He cleaned the floats and the vacuum pump. Still no go. Can anyone offer some ideas aboutwhat else to check?