RedactedNarrative: On March, 30 2014, this reporting officer (r/o) responded in reference to a boating accident. An explosion had come from the engine compartment on board the vessel. The vessel was moored to the owners dock at the time of the accident. Rio arrived on scene to see the victim receiving medical attention from greenwood county EMS. The victim had received 2nd and 3rd degree burns on his face, arms, and back. There were 3 subjects on board at the time of the accident. victim, owner of the vessel, and two others. Witness was standing on the engine cover at the time of the explosion. Victim was located at the helm. Subject3 was down inside the cabin of the vessel. Victim stated he turned the ignition on to check that the batteries had a charge and he heard a loud explosion. Witness stated he was lifted up about a foot high off the engine compartment at the time of the explosion. Subject3 heard a loud explosion and the cabin was on fire.  Subject3 then exited the cabin and was pushed into the water. R/O received assistance from officers in obtaining statements from the subjects. Victim stated they used a fire extinguisher and water to extinguish the fire. R/O boarded the  vessel and noticed a large amount of liquid in the bottom of the engine compartment. The liquid was believed to be a mix of fuel and water.  The exhaust fan switch for the engine compartment was in the off position. Victim stated he did not turn the exhaust fan on or open the engine compartment prior to turning on the ignition.  Victim had put the vessel in the water on March 27th and driven it a short distance from the landing to his dock. There was approximately 50 gallons of fuel put into the vessel on the some mechanical work done on the vessel. During a follow up interview Victim stated he had found a pin hole in the fuel line that had been leaking fuel into the engine compartment.  R/O issued the owner a warning for a registration violation. No summons were issued. Photographs were taken of the vessel. The victim was taken to the Augusta burn center where he received medical treatment.  He has since been released.