RedactedNarrative: A vessel accident occurred in the Delaware River in Bordentown.  As a result of the accident four people were injured. The occupants of vessel #1 reported smelling gasoline earlier in the day.  They opened the engine compartment to check for fuel leaks, none were found and the odor of gasoline dissipated so they thought that there was no issue with the fuel.The vessel was anchored in the cove at the north end of Newbold Island.  There is a slight current there and the vessel began to drift.  The operator of Vessel #1 decided to move the vessel.  When he started it, there was an explosion in the Engine compartment.  the hatch cover was blown open, nearly ejecting one of the passengers.  Fire came from the engine compartment, burning four of the passengers, before the engine cover fell back in place, smothering the fire.  The adults then put on PFDs and everyone went on shore to wait for assistance. Vessel #1 remained at anchor. 
  
  Operator #1 stated  to the effect, " I was standing at the drivers console and started the engine. There was a "boom" and flames came up out of the engine , blowing the engine hatch off.  Then the hatch cover fell back down and the fire went out .