RedactedNarrative: Owner/operator of vessel installed a hydro-foil to stern drive of vessel.  During test operation and at various speeds noted unusual weight and drag of his boat.  A portion of the transom had cracked and separated, causing vessel to take on water and capsize and sink.  Both occupants were retrieved from the water.
  
  Vessel was towed to Bear Creek Harbor boat launch by WCSO Marine Patrol.
NameOfBodyOfWater: Lake Ontario
NearestCityTown: Ontario                       