A market existed in the 2-cycle engine field for an internal combustion engine in the 1-1/2 to 2-1/2 in3 displacement range for the original equipment manufacturer. The engine had to be lightweight, compact, low in manufacturing costs, and yet offer high power output and continuous operation.
For this market, O & R Engines, Inc. designed the 2-CID Model 20 engine. The design filled a further requirement of the OEM by providing the flexibility of component design and arrangement. This paper discusses these design aspects.