This manual pertains to Lycoming aircraft engines, specifically focusing on the overhaul of horizontally installed, direct drive engines. It covers models featuring 4, 6, and 8 cylinder configurations, renowned for their robust engineering and reliability in aviation applications. This documentation is essential for maintaining the peak performance and longevity of these critical powerplants.

The purpose of this English-language Overhaul Service Repair Manual is to provide comprehensive guidance on service and repair procedures for Lycoming aircraft engines. It details the necessary steps for a complete overhaul, ensuring that mechanics and technicians have the authoritative information required for accurate and efficient maintenance. By following the detailed instructions within, owners and service professionals can confidently undertake engine overhauls, adhering to the highest standards of safety and operational integrity.