This is an instruction manual for O.S. engine.
This document is the owner's instruction manual for the O.S. 108FSR internal combustion engine, designed specifically for use in model aircraft such as sports and scale types. It emphasizes strict adherence to safety instructions regarding fuel handling, propeller security, and operating in open areas due to carbon monoxide risks.
This engine was designed for model aircraft. Do not attempt to use it for any other purpose.
The wearing of safety glasses is strongly recommended, and an electric starter is preferred.