This manual covers the Lycoming IO-540 W series aircraft engine, a product of Lycoming, designed for aviation propulsion. Engineered for reliability and performance, this horizontally opposed, naturally aspirated engine boasts a displacement of 540 cubic inches and utilizes Aviation Gasoline (Avgas). Its robust construction and proven design make it a cornerstone for various aviation applications.

This Illustrated Parts Catalog (IPC), identified as PC-615-4 and published on October 1, 1993, provides essential information for parts identification and service. With 70 pages of detailed content, it serves as a critical resource for owners, mechanics, and technicians. The catalog facilitates accurate component selection and understanding, ensuring the continued operational integrity and longevity of the Lycoming IO-540 W series engine.