The new conception of the two stroke gasoline engine was tested on three experimental units. The characteristic feature for this conception is the scavenging of cylinder by clean air and internal formation of the mixture with a controlled blowing of the rich mixture into the cylinder. The rich mixture forms together with the residual air from scavenging an inflammable and combustible mixture. Design solutions are presented and analyzed from the point of view of experimental results. On the basis of these analyses, suggestions for further development of the engine are given, with the objective to attain the expected values of working and environmental contamination parameters of small two stroke gasoline engine that are presented in the conclusion of this paper.