Accident Description
The airplane was taking off when the engine ceased operation at the departure end of the airstrip, approximately 50 feet above the ground. The pilot executed a straight-ahead landing onto a short gravel bar. Subsequently, the airplane nosed over into a river. The carburetor remained above water.
Pilot Report and Fuel System
The pilot reported that the front fuel tank was full and selected. The fuel system remained intact following the incident.
Engine Examination
Disassembly of the engine revealed no mechanical, fuel system, or ignition system anomalies. No fuel was found in the main fuel supply line. A mixture of water and fuel was discovered in the carburetor bowl.