RedactedNarrative: Operator and son were returning to the harbor when the engine began running rough and was cavitting. The thrust was not right.  He heard a pop and the engine burst into flames.  He threw the anchor and called mayday.  He did not smell any fuel odor before fire started.  A passing vessel rescued the men on board.  Accidental mechanical malfunction was the cause according to the Fire investigator.
NameOfBodyOfWater: Marblehead Harbor
NearestCityTown: Marblehead                    