RedactedNarrative: Patrol officer noticed a large amount of smoke coming from listed vessel.  Upon arrival operator stated that he had already sprayed two extinguishers on engine fire to no avail.  All subjects onboard boat were able to safely exit craft onto police boat.  Vessel then erupted into flames.  Local fire department responded and was able to contain fire.  Vessel was leaking fuel from hull requiring additional cleanup.  No injuries occurred.  Cause of fire was found to be electrical after investigation.