Incident Summary
While climbing to cruise altitude, the pilot reported that the engine lost power and then quit. Attempts to restart the engine were unsuccessful. The aircraft conducted a forced landing, and after touchdown, it nosed over.
Post-Accident Examination
Following the accident, a temporary fuel supply was connected to the engine. Attempts to run the engine were unsuccessful unless the throttle was pumped. The carburetor was removed and disassembled, revealing a sticking needle valve. After the carburetor was reassembled and reinstalled, the engine operated normally.
Engine History
Prior to the aircraft's purchase by the flight school, the engine had been operated using automotive fuel.