This comprehensive Operator's Manual provides detailed instructions and information for the Avco Lycoming 0-340-A1A aircraft engine. The manual covers all aspects of engine operation, maintenance, and troubleshooting. It describes the engine's design, including its four-cylinder, wet sump, horizontally opposed layout, featuring staggered cylinders for optimized crankshaft design. Written in clear and concise language, the manual ensures that users of all levels can easily understand and apply the information. This invaluable resource is a must-have for owners, operators, and mechanics of the Lycoming 0-340-A1A engine, enabling them to maintain optimal engine performance, safety, and longevity.

The Lycoming O-340-A1A is a renowned four-cylinder, horizontally opposed, air-cooled aircraft engine, renowned for its reliability and efficiency. This engine was manufactured by Lycoming Engines, a prominent American company known for producing robust and dependable powerplants for general aviation aircraft. The O-340-A1A is a derivative of the O-320 series, boasting a slightly larger displacement of 170 cubic inches (2.8 liters). Its design features a direct drive, a single-stage reduction gear, and a wet sump lubrication system, offering a balanced blend of performance and durability. The engine generates a maximum power output of 160 horsepower at 2,700 RPM, making it ideal for powering a diverse range of aircraft, including single-engine trainers, light utility planes, and even some homebuilt aircraft.

The Lycoming O-340-A1A engine has earned a reputation for its exceptional reliability and longevity. It is known for its robust construction, featuring a cast aluminum crankcase, steel connecting rods, and forged aluminum pistons. The engine's simple and efficient design, combined with its use of proven components, has contributed to its reliability. Moreover, the O-340-A1A is renowned for its fuel efficiency, which is attributed to its relatively high compression ratio and the optimized combustion process. The engine is also known for its relatively low maintenance requirements, making it an attractive option for both private and commercial aircraft operators. The O-340-A1A remains a popular choice for aircraft owners and operators seeking a dependable and cost-effective powerplant, solidifying its legacy as a cornerstone of general aviation.