This manual covers the Lycoming 0-145 and GO-145 aircraft engines, manufactured by Lycoming Engines. These horizontally opposed, 4-cylinder engines feature a displacement of 144.4 cubic inches and produce 65 horsepower at their rated RPM. Designed for aircraft propulsion, they utilize Aviation Gasoline (Avgas) and a wet sump lubrication system, with dual magneto ignition. The engines are built with a fully counterweighted crankshaft and a flanged mount for robust performance and reliability in aviation applications.

This Overhaul and Parts Manual provides comprehensive guidance for the maintenance, repair, and overhaul of the Lycoming 0-145 and GO-145 series aircraft engines. It details essential technical specifications, including bore, stroke, and compression ratio, alongside critical maintenance information such as recommended oil types and capacities, and detailed inspection schedules. This manual is an indispensable resource for owners, mechanics, and technicians, ensuring the continued operational integrity and longevity of these vital aircraft propulsion systems.