Operator of Vessel was traveling West (upstream) when he began to have engine trouble.  He stopped and went to engine compartment to check engine.  He then discovered water in engine compartment.  Operator then turned on bilge pump and tried to re-fire engine.  Engine would not start.  He then called for assistance.  Boat filled with water and operator was rescued.  After recovering Vessel, it was discovered that the engine plug assembly was missing from the stern of the Vessel.

OPERATOR OF VESSEL IS PHYSICALLY DISABLED AND IN A WHEEL CHAIR.  HE WAS WEARING HIS PFD BEFORE AND DURING THE INCIDENT.
Vian                          