Continental IO-520

O-520
Preserved IO-520
TypePiston aircraft engine
National originUnited States
ManufacturerTeledyne Continental Motors
First run1963
Major applications
Manufactured1964-present
Developed fromContinental IO-346
Developed intoContinental IO-550

The Continental IO-520 is a six-cylinder, horizontally opposed aircraft engine produced by Teledyne Continental Motors. First run in 1963 as a development of the IO-346, it has been produced in versions incorporating fuel injection (IO-520), turbo-charging (TSIO-520), and gearing (GTSIO-520).