As the aircraft was exiting a stall turn the pilot noticed that the engine and propeller had stopped. He attempted to restart the engine by diving the aircraft. However, the engine had not restarted by the time the aircraft reached 2000 feet above ground level and the pilot decided to land the aircraft in an open area. During the approach the pilot realised that the selected landing area was unsuitable so he chose another area. As the aircraft approached the new area it struck trees and came to rest at the edge of that area. No defects were found with the aircraft or its systems which may have contributed to the engine failure or the pilots inability to restart the engine. It is considered likely that the high nose attitude during the stall turn manoeuvre may have caused an interruption to the flow of the gravity fed fuel system, resulting in the engine being starved of fuel. Although the pilot had been briefed on the engine restart procedure, he had not been shown an inflight restart. It is likely that the dive, conducted by the pilot, may have been too shallow to effect an engine restart.