RedactedNarrative: On 05/27/18 at approximately 0025 hours I, Cpl, received a call for a possible boat explosion located at Kennersley Point Marina in Church Hill, Maryland. I responded from the Kent Narrows area and arrived on scene at about 0100 hours. Members of the Church Hill Fire Department were on location. I walked out on the wooden dock to slip where the incident occurred. The fire had already been extinguished by the actions of a few witnesses in the area as I later determined. There were no injuries as no one was on board the boat. The vessel in question was a 36 foot Cruiser cabin motorboat with the name "Star Fish" on the stern. The vessel was all white in color. The vessel had a registration number of MD 8206 BT. 
   I met with Owner on site and he told me that he had left the marina about an hour or so earlier before the explosion. He told me he was notified by the marina staff by phone to return to his boat. Owner told me that he had just purchased the boat about two weeks prior from a private citizen. He told me that the boat had just been launched the night before at the marina and he had been working on it the past few days trying to get it seaworthy for the upcoming summer season. Owner told me he had a battery charger attached to one of the batteries and it was actively working. The damage was mostly contained in the engine compartment, specifically the port engine. The vessel had twin 454 cubic inch Mercruiser inboard motors. Some of the vent hoses had melted and the port engine was covered in oil. Owner told me he had removed the hatch covering the port engine before the explosion to allow for better ventilation. There was also damage to the floor in the forward cabin from the explosion. (See attached photos). There was a strong odor of gasoline vapors coming from the vessel and there was some minor fuel leakage in the water. The fire department was working to contain the fuel spill with floating booms. I interviewed two witnesses including the marina manager and had them complete witness statements.
   There appeared to be no damage to the dock or adjacent vessels. Subject1 told me the fire was out in less than 30 seconds due to the actions of the staff. Subject1 told me that three fire extinguishers were used that had been placed along the wooden dock. Upon my initial investigation, this accident appeared to have been caused by either a mechanical or electrical malfunction. No charges are pending against the owner. The vessel is insured by Allstate Insurance Company. I followed up with Subject1 at the marina on 05/31/18 and took additional photos of the boat (See attached photos). The vessel was still in the water at that time. Subject1 told me he expected to haul out the boat later that day as someone was scheduled to perform a damage estimate on it soon.
   All events occurred in Queen Anne's County, MD