bigbird

I just purchased a 230 challenger se High Output with 25 hrs. I had a mechanic check over the engine and evreything was fine. On the third time out with the boat the hot engine alarm came on and some smoke came from the engine when I lifted the cover. When the alarm sounded I immediately shut off the engine.

Question: What would be a possible cause of the engine overheating and did I do permanent damage? I've been told the fix could be as simple as removing weeks stuck in the impellar intake.