RedactedNarrative: On Saturday, 05-24-14, operator, his son, and two friends departed Black Point boat ramp on FL 5527 FR. The vessel was running well, as it had in the past. They made it to the reef line ocean side of Caesar's Creek. As they were cruising the the boat started to lose speed and the engine was dropping in RPM. Operator decided to check the bilge and when he opened the bilge hatch on the stern deck he realized it was full of water. With the boat's bilge full of water and the additional weight of the occupants at the stern, water started to come over the stern's notched transom. They immediately donned their PFDs and Operator relayed an emergency call via VHF to USCG. Occupant1 grabbed Occupant2 who was five years old and had been wearing a life jacket, and jumped into the water just before the boat capsized. 
   
  Operator and occupant3 were momentarily trapped under the vessel when it capsized but were able to exit. None of the four individuals were injured. A Good Samaritan vessel named "Heaven Sent" , noticed that the boat capsized and quickly responded to the area to render aid. They recovered the three men and child and remained on scene until Tow Boat US, FWC and USCG arrived. While speaking with Operator he explained the boats self filling live well over flows into the bilge, and the water is normally pumped out by the bilge pump. He explained that the bilge pump must have stopped working and he did not realize it. This led to the boat filling with water. Tow Boat US advised me that the drain plug was on the vessel when he arrived. The vessel was righted and towed to Black Point Marina. The vessel floated normally and did not appear to take on any water while tied to the dock prior to being placed on the trailer.