Was running the boat today 24ft cuddy. Boat ran great 2 plus hours. Ran back 20 minutes to the dock at WOT when I slowed down i immediatly noticed engine was rough. Took the boat back out and seems to run fine (well no power loss)<br />Sat tied up at the dock at idle for a good 20 minutes when i got in never even hinted at stalling. I opened up the engine compartment and noticed what looked like an occasional wisp of smoke or vapor coming from the breather on the carberator. All guages read normal while running and while tied up at idle. We have had torential downpours and very wet weather for 2 days as well.