I would like to suggest making sure you did not get water in the engine, air system, etc... I would change the oil immediately and look to see if it has water in it. I am pretty sure that I read in some document, either the user manual or service manual what to do if you went into deep water. I would not try to crank it over anymore until I was very sure it was fully dried out and you were sure no water got into the engine.
Do you know where the buzzing is coming from?
Do you know where the buzzing is coming from?