RedactedNarrative: The owner of the vessel left the fuel dock (took on 32 gallons fuel) engine was attempting to start when an explosion happened.  The owner state he had his blower on.  After the explosion both the operator and passenger jumped into the water and swam to the fuel dock.  The vessel then engulfed into flames and drifted out of the marina into the Sandusky Bay where the Sandusky Fire Department put the fire out.  The boat then sank comply to the bottom.