This comprehensive Operators Manual for the TEXTRON LYCOMING SERIES OEM 0-320, IO-320, AIO-320, LIO-320 aircraft engines provides detailed guidance and instructions for proper operation and maintenance. It covers all aspects of the engine, including pre-flight inspections, start-up procedures, in-flight operation, shutdown procedures, and troubleshooting. Designed for clarity and ease of use, this manual features a bookmark system for quick navigation and a search function for efficient information retrieval. With a total of 110 pages, this manual serves as an invaluable resource for pilots, mechanics, and anyone involved in the operation and maintenance of these engines.

The Lycoming O-320 series of horizontally opposed, four-cylinder aircraft engines is a mainstay in the general aviation world, renowned for its reliability, efficiency, and versatility. Developed by Lycoming Engines, a subsidiary of AVX Corporation, the O-320 family encompasses several variants, including the IO-320, AIO-320, and LIO-320. These engines are broadly categorized by their fuel system: the "O" designation signifies a naturally aspirated engine, while "IO" indicates fuel injection, and "A" and "L" stand for variations in power output and accessories. The O-320 series engines are commonly found powering single-engine airplanes, from trainers and light sport aircraft to utility aircraft and homebuilts.

The O-320 engine boasts a displacement of 320 cubic inches (5.24 liters) and a power output ranging from 150 to 200 horsepower, depending on the specific model. Its compact size, lightweight construction, and relatively low maintenance requirements make it an attractive choice for many aircraft manufacturers. The engine's reputation for reliability stems from its robust design, with features like a cast-iron cylinder block and steel crankshaft, ensuring durability in demanding flight conditions. Additionally, the O-320 series is known for its fuel efficiency, delivering a good power-to-weight ratio, contributing to the overall performance and cost-effectiveness of the aircraft it powers. The O-320 engine remains a popular choice for aircraft owners and pilots who value its proven performance, reliability, and relatively low operating costs.