This manual mainly introduces the safety operation methods of O.S. four-stroke engines, including engine components, installation, operation, maintenance and other contents.
The O.S. FF-320 is a horizontally-opposed four-cylinder overhead-valve four-stroke-cycle engine with a displacement of 53.04cc (3.24cu.in). Designed for model aircraft, it features a radial motor mount and includes specific tools and accessories for installation and operation. The manual emphasizes strict adherence to safety warnings regarding the propeller, fuel, and exhaust heat to prevent injury.
| Displacement | 53.04cc (3.24cu.in) |
|---|---|
| Cylinder Configuration | Horizontally-opposed four-cylinder |
| Cycle Type | Four-stroke-cycle |
| Valve Type | Overhead-valve |
| Intended Use | Model aircraft |
The engine should be installed with the carburetor below the crankcase so that the exhaust pipes point downwards, mounted securely to a rigid firewall.
An electric starter is recommended for this engine, and the wearing of safety glasses is strongly advised.