Pilot Report
The pilot stated that a preflight inspection of the airplane was conducted before departure and no discrepancies were noted. The airplane departed with full fuel tanks and flew to a nearby area where it orbited several times. The pilot then flew to another area and later returned to the original area for additional orbits.
According to the pilot, during the second set of orbits, carburetor heat was applied and the throttle was reduced. After observing the area again, the pilot applied throttle and removed carburetor heat. The engine did not respond to throttle input. The pilot verified that the mixture control was set to full rich and the magneto switch was in the 'both' position. Pumping the throttle resulted in a slight increase in engine RPM.
Forced Landing
The pilot maneuvered the airplane for a forced landing. Just before touchdown, the mixture control was placed in the idle-cutoff position and the magneto switch was turned to the off position. After touchdown, the airplane rolled through a fence and then nosed over.
Post-Accident Examination
The airplane was recovered. Using some of the fuel that was still in the airplane at the time of the accident, the engine was started and found to operate normally.
Meteorological Conditions
Review of the icing probability chart indicated that the conditions were favorable for moderate icing at cruise power or serious icing at descent power.