The pilot was conducting a local flight in the training area. He reported that while in cruise at 3500 feet above sea level, the oil pressure and RPM dropped. He carried out a trouble check but was unable to restore power. He carried out emergency landing procedures. During the landing, with a tailwind component, and only 10 degree flap selected, the aircraft overran the intended touchdown area, struck a fence and the nose gear folded under. The aircraft came to rest at the edge of a swamp. No fault was found with the engine. It was suspected that the loss of power was due to carburettor icing.
