RedactedNarrative: Operator advised he just fueled the vessel and drove to the boat ramp. Subject backed him into the water. A log from under the dock became lodged under the boat. Operator turned on blower and heard it running. He tried to start engine, the first two attempts nothing happened-didn’t turn over, didn’t click. The third time he turned the key the boat exploded and blew the engine hatch open. Operator attempted to extinguish fire with fire extinguisher and a bucket of water. Operator jumped in river and swam to shore near ramp without a lifejacket. The fire dept responded and put water on the fire. The fireboat attempted to tow the boat to shore but it sank. 
  
  The operator owned the boat for four years. He replaced the starter and alternator with marine parts. He also replaced various hoses and wiring but nothing recently. 
  The owner/operator had paid for insurance in June but it didn’t take affect until July 1, 2020.