40/3/7: Unidentified engine features a domed piston.
A friend asked me to submit the following pictures. There is no identification on the engine. He believes the colors to be correct. The interesting thing is the domed piston. No one has been able to help in identifying or providing any information. We are hoping a reader may know more about this engine. Irvin Haisch, 86527 577th Ave., Concord, NE 68728; email@example.com