RedactedNarrative: Operator fueled vessel at Island Boat Yard & Marina fuel dock. After running blower approx. 5 minutes, operator attempted to start vessel leading to a small explosion in engine compartment. All occupants disembarked to fuel dock as vessel caught fire. Dock personnel cast vessel adrift into mouth of Menantic Creek. Fully engulfed vessel drifted NE into Menantic Creek beside vessels docked at marina, damaging vessel 2. Following initial fire suppression, vessel towed and grounded west of fuel dock for final fire suppression.