Exceeding the standard in general aviation

Lycoming’s 541 engine series is a top induction, down exhaust, turbocharged, direct-drive engine series with side-mounted accessories producing 380 horsepower.

Lycoming’s four-cylinder 235 Series engine is a popular choice for home-built, as well as OEM-produced aircraft. With models producing up to 125 hp at 2,800 RPM, this engine powers many aircraft around the world.

Lycoming’s four-cylinder 320 Series engines produce 150 or 160 hp at 2,700 RPM. These engines power numerous popular aircraft produced by companies like Cessna, Piper, and kit manufacturers such as Van’s and Glasair. The 320 Series also powers the early Robinson R22 helicopter.

Lycoming’s extremely popular four-cylinder 360 engine combines rugged reliability with smooth performance, producing 145 to 210 hp. Since 1955, certified 360 cubic inch engines from Lycoming have been installed in thousands of aircraft.

Lycoming’s 390 Series four-cylinder engines produce 210 hp at 2,700 RPM. One of Lycoming’s newest engines, the IO-390-A, is designed to meet the power, payload, and speed requirements of the kit aircraft segment, and is currently being certified for helicopter applications.

Lycoming’s 540 Series six-cylinder engines are powerful and durable, producing 235 to 360 hp at up to 2,700 RPM.

The Lycoming 580 Series of six-cylinder engines is powerful, producing 315 hp at 2,700 RPM with reliable direct drive and excellent power to weight ratio. This model meets the ever-growing performance requirements of modern-day aircraft design, and is also a popular retrofit under Supplemental Type Certificates.

Lycoming's eight-cylinder IO-720 Series engines produce up to 400 hp at 2,650 RPM, and are the largest engine in production today at the Lycoming factory.

Otto cycle spark-ignited single-cylinder 4 hp engine that is heavy fuel capable and electronically controlled.