This comprehensive overhaul manual provides detailed instructions and specifications for the Lycoming O-235C and O-290D aircraft engines. It serves as an essential resource for mechanics and technicians performing major overhauls and repairs on these engines. The manual covers a wide range of topics, including engine disassembly, inspection, component replacement, assembly, and testing procedures. It offers clear illustrations and step-by-step instructions to ensure accuracy and efficiency throughout the overhaul process. You'll find in-depth information on critical components such as cylinders, pistons, connecting rods, crankshafts, valves, and more. This manual is designed to be user-friendly and easily navigable, enabling technicians to quickly locate the information they need to complete their work effectively.

The Lycoming O-235C and O-290D Overhaul Manual is not a vehicle or device itself, but rather a comprehensive guide for the maintenance and overhaul of two popular aircraft engines: the Lycoming O-235C and the Lycoming O-290D. These engines, manufactured by the Lycoming Engines division of Avco Corporation, are renowned for their reliability and durability, commonly powering a wide range of general aviation aircraft. The O-235C, a 4-cylinder horizontally opposed engine, boasts a 115 horsepower output, while the larger O-290D, with its 6-cylinder configuration, generates a more substantial 135 horsepower. Both engines feature air-cooled designs, renowned for their simplicity and low maintenance requirements. The Lycoming O-235C and O-290D have been widely adopted by numerous aircraft manufacturers, including Cessna, Piper, and Mooney, propelling iconic models such as the Cessna 150, Piper Cherokee, and Mooney M20. The Lycoming O-235C and O-290D Overhaul Manual, designed for experienced aircraft mechanics and technicians, acts as a vital resource for the meticulous process of engine overhaul. This manual delves into every aspect of engine disassembly, inspection, repair, and reassembly, outlining procedures for component replacement, tolerance verification, and performance testing. It includes detailed diagrams, schematics, and explanatory text, guiding technicians through the necessary steps to restore the engine to its original factory specifications. This comprehensive manual provides detailed instructions for each stage of the overhaul process, ensuring that the engine is returned to its optimal operational condition, meeting stringent aviation safety standards. By adhering to the manual's guidelines, technicians can effectively maintain the engine's reliability and extend its service life, contributing to the safe and efficient operation of the aircraft.