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O-290

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Lycoming O-290 run-up after overhaul

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O-290-D overhaul run up

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Another O-290 start up

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Overlook Residence O-290

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How to torque spark plugs on a lycoming O-290 engine!

The Lycoming O-290 is a dual ignition, four-cylinder, air-cooled, horizontally opposed aircraft engine. It was first run in 1939, and entered production three years later.