RedactedNarrative: While cruising along at 40-45mph the boat suddenly went into a hard left turn.  I let off of the hot foot throttle and tried to correct course.  However, the boat did not respond.  Boat spun around to the left over 270 degrees before coming to rest.  It was then that we found the engine was no longer on the boat.
NameOfBodyOfWater: Green Bay (Lake Michigan)
NearestCityTown: Sturgeon Bay