This manual covers the Continental Motors IO-520 Permold Series aircraft engine, designed for aviation applications. The IO-520 engine is a 6-cylinder, horizontally opposed, air-cooled, normally aspirated unit with a displacement of 520 cubic inches and a power output of 285 horsepower, utilizing Aviation Gasoline (Avgas). This engine series, including models IO-520-B, IO-520-BA, IO-520-BB, IO-520-C, IO-520-CB, IO-520-M, and IO-520-MB, is recognized for its robust engineering and reliable performance in demanding flight environments.

This Parts Manual, identified by code X30624A, provides essential information for identifying and ordering components for the Continental Motors IO-520 Permold Series engines. It serves as a critical resource for owners, maintenance personnel, and technicians to ensure the correct parts are selected for the maintenance, repair, and overhaul of these engines. While this manual focuses on parts identification, users should consult specific engine overhaul manuals or service bulletins for detailed procedures, approved oils, and oil capacity requirements.