This manual covers the O-235C and O-290D aircraft engines. These reciprocating engines, with displacements of 235 cubic inches and 290 cubic inches respectively, are designed for aviation applications and utilize Aviation Gasoline (Avgas). The engineering quality and reliability of these engines are well-established, making them a trusted choice for a variety of aircraft. This overhaul manual provides comprehensive guidance for maintaining these essential components.

The purpose of this English-language overhaul manual is to detail the procedures necessary for the thorough maintenance and repair of O-235C and O-290D aircraft engines. It encompasses essential information on overhaul procedures, technical specifications, and other vital data required for technicians and owners. By following the clear and easy-to-navigate instructions within this document, users can ensure the continued optimal performance and longevity of their aircraft engines.