Operator indicated he had just added gasoline to his boat at Harrison Bay Marina.  He indicated he started the blower and ran it for about 10 minutes and started his port engine.  He moved away from the dock and attempted to start his starboard engine when an explosion happened.  His wife got in the water and waited for rescue crews to arrive.  Upon my inspection of the boat, the blower was not turned on and both engines were in gear.  The bilge pump was running.

The boat had an automatic halon type fire suppression unit but I could not determine if it discharged.
HARRISON                      