RedactedNarrative: Vessel 1 was refueling at the pier ytilizing a 5 gallon container. Operator operated the blowers and started the engine. The engine was running for approximately 2 minutes.  Subject untied the lines at which time the engine exploded.  He immediately jumped overboard and swam to safety. Vessel 1 drifted into a pier causing burn damage to approx. 30 feet of pier.
  
  Operator had minor burns to the back of the leg, refused medical treatment.