What is lycoming o540?

The Lycoming O-540 is a six-cylinder, horizontally opposed aircraft engine first produced in the 1960s. It has a displacement of 541 cubic inches (8.87 L) and produces between 235-350 horsepower depending on the specific variant. The engine features a dual magneto ignition system, a wet-sump lubrication system, and a direct drive propeller assembly. It is commonly used in a wide range of aircraft, including the Piper PA-28 Cherokee, Beechcraft Bonanza, and Cessna 182. The Lycoming O-540 is also known for its reliability and durability, which has made it a popular choice among aircraft manufacturers and pilots alike.