This manual covers the Continental IO-520 aircraft engine, manufactured by Continental Motors Group. The IO-520 is a horizontally opposed, 6-cylinder, air-cooled, fuel-injected engine with a displacement of 520 cubic inches, producing 285 horsepower at 2700 RPM. Designed for propeller-driven aircraft propulsion, this engine is known for its robust engineering and reliability in demanding aviation applications. Its specifications include a bore of 4.625 inches, a stroke of 4.500 inches, and a compression ratio of 7.0:1, with a dry weight of approximately 370 lbs. The engine utilizes Aviation Gasoline (Avgas) and requires an 8-quart oil capacity.

This Overhaul Manual, published in English in April 2010, provides comprehensive guidance for the maintenance and repair of the Continental IO-520 engine. It details essential procedures, technical specifications, and safety guidelines necessary for ensuring optimal performance and longevity. Owners, mechanics, and technicians will find valuable information on inspection schedules, recommended service intervals, and specific oil requirements, all designed to facilitate effective upkeep and troubleshooting. Adherence to the procedures outlined in this manual is critical for maintaining the engine's operational integrity and safety.