The IO-540 is a six-cylinder, horizontally opposed aircraft engine produced by Teledyne Continental Motors. It is commonly used in general aviation aircraft and is known for its reliability and performance. The engine typically produces between 250 to 300 horsepower, making it suitable for a variety of light aircraft. The IO-540 features a fuel-injected design, which enhances fuel efficiency and power output. It is often found in popular aircraft models, such as the Piper Navajo and Cessna 206. Its robust construction and proven technology make it a preferred choice for pilots and aircraft manufacturers alike.