This Parts Catalog Manual pertains to the aircraft engines manufactured by Lycoming. These horizontally opposed, air-cooled piston engines, with a displacement of 235 cubic inches and designed for Aviation Gasoline (Avgas), are recognized for their robust engineering and reliability in aviation applications. This catalog specifically aids in the identification and ordering of replacement parts, ensuring the continued operational integrity of these engines.

The purpose of this manual is to provide comprehensive documentation for the engines. It includes detailed part numbers, diagrams, and service guidance essential for maintenance and repair. The manual is presented in English and features chapter bookmarks and keyword search for efficient navigation, making it a clear and easy-to-follow resource for owners, mechanics, and technicians. Its scope is focused on facilitating the correct identification and procurement of replacement components, thereby supporting the upkeep and longevity of the aircraft engines.