Lycoming IO-390

IO-390
TypePiston aero-engine
National originUnited States
ManufacturerLycoming Engines
First run2002
Major applications
Manufactured2009–present
Developed from

The Lycoming IO-390 engine is a horizontally opposed, four-cylinder aircraft engine, manufactured by Lycoming Engines.

There is no carburetted version of the engine, which would have been designated O-390 and therefore the base model is the IO-390.