RedactedNarrative: On June 25th, 2022, at approximately 1145 hours, the operator explained to me that the group had beached the boat in the cove on Lake Mead so that they could hangout. After approximately an hour and a half, the operator noticed that the vessel was beginning to become dislodged from the shore and float away. The operator jumped onto the vessel and turned the ignition key over to start the vessel which prompted the explosion. The explosion caused the hatch towards the stern of the boat to propel into the operators back. He informed me that he was okay and refused medical attention. Once the vessel was on fire, the operator jumped off the vessel while wearing a PFD. The three individuals associated with the vessel, Warden and some good Samaritans used fire extinguishers to stop the fire but were unsuccessful. The fire was eventually extinguished by the National Park Service fire boat but nothing on the vessel was salvageable. Due to the vessel being burned down to the waterline, I was unable to identify any parts of the of the vessel that would have directly contributed to the cause.