RedactedNarrative: The operator, along with two passengers, were operating a recently purchased used-motorboat with a newly attached used-motor. The operator described having to fill cracks in the transom with epoxy and reinforcing the transom as it had felt a bit "soft" after placing the new used-motor on the boat. 
  
  The operator stated the boat had not been in the water since it was purchased and they had wanted to test its sea-worthiness. 
  
  After driving in the water and away from shore, the outboard motor began to separate from the transom and water began filling the boat. The water filled so quickly they had to abandon the boat and swim to a nearby island. The boat quickly sank almost immediately to the bottom of the lake. All 3 occupants of the boat had been wearing life jackets prior to the incident and were wearing them in when they submerged into the 45 degree water. They were later rescued.
  
  Both on the nearby island and in the water by first responders. They were all admitted and later released from the hospital after being treated for hypothermia. Notes - 1972 15 ft thompson tri hull motorboat - 125 hp force motor - unknown the hp or capacity