The airplane experienced a total loss of engine power at 1255 Eastern time while in cruise flight. The private pilot and passenger were not injured, but the airplane was substantially damaged during the subsequent forced landing. Visual conditions prevailed. The pilot later stated the engine began to run rough. He applied carburetor heat and the engine cleared up. He disengaged the carburetor heat but the engine again began to run rough and lost power. The pilot subsequently made a forced landing on a shoreline and nosed over inverted. Debris were discovered in the main fuel gascolator and the carburetor.
