This manual covers the Lycoming 0-235-C Series and 0-290-D aircraft piston engines. Engineered for reliability and performance, these engines are designed for aviation applications and utilize Aviation Gasoline (Avgas). This comprehensive guide is intended to support the overhaul, repair, and testing of these specific Lycoming engine models, ensuring their continued operational integrity.

The purpose of this Overhaul Service Repair Manual is to provide detailed instructions and essential information for maintaining and restoring the Lycoming 0-235-C Series and 0-290-D engines. It includes step-by-step guidance for disassembly, cleaning, inspection, repair, replacement, reassembly, and testing procedures. Additionally, the manual lists all required tooling and specifications necessary for these tasks, serving as an indispensable resource for owners, mechanics, and technicians.