RedactedNarrative: Owner of Unit 1 hired someone to replace the carburetor on his boat.  The mechanic and his helper were working on the boat.  The mechanic was at the helm attempting to start the engine of Unit 1 while his helper was pouring gasoline into the carburetor.  The gasoline vapor contacted an unknown ignition source and started a fire onboard Unit 1.  The mechanics helper suffered 2nd degree burns to 10% of his body, including the left side of his face, both arms from wrist to shoulders, left leg from ankle to knee, and on his right knee.  The mechanics helper was transferred via POV to ANMED hospital for treatment and then referred to ABC.  Unit 1 was completely destroyed by the fire and extinguished by Williford Fire Dept.