RedactedNarrative: Vessel #1 was idling in a small channel. While checking navigation lights and bilge pump, an engine compartment explosion occurred and sent the motor cover forward, hitting the operator in the back of the head. 
  
  Subject believes when he turned on the bilge pump is when the explosion occurred. The operator then jumped in the water to avoid the fire. No injures were sustained.
  
  The subject had filled the gas tank to the brim and travelled over 30 miles prior to launching vessel.