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Lycoming

New Prop for Cirrus SR20s Approved

By General Aviation News Staff · May 27, 2026 · Leave a Comment

MT-Propeller on Cirrus SR20

MT-Propeller has received STCs from the FAA, EASA, and TCAA Canada for the installation of its scimitar 3-blade propeller on Cirrus SR20s powered by Lycoming IO-390-C3B6 engines.

Can I Boost My Engine’s Horsepower?

By Paul McBride · May 4, 2026 · 6 Comments

General Aviation News engine expert Paul McBride tackles a reader’s question about converting a Lycoming O-540-B from 235 horsepower to 250 horsepower.

Why Are My Oil Temperatures So Low?

By Paul McBride · March 30, 2026 · 5 Comments

A reader reaches out to our engines expert about very low oil temperatures in his Van’s RV-8.

What’s The Difference Between Narrow Deck And Wide Deck Engines?

By Paul McBride · December 22, 2025 · 3 Comments

Question for Paul McBride, the General Aviation News engine expert: In your recent column, “The fall-out from not doing due diligence,” you mentioned narrow deck and wide deck. My question: “Is a narrow deck an angle valve 540 and a wide deck a parallel valve 540? “

Can I upgrade to a turbocharger?

By Paul McBride · November 3, 2024 ·

Question for Paul McBride, the General Aviation News engines expert: I own a Piper Cherokee 6. Is it possible to upgrade this engine with a turbocharger?

Can my engine really be converted with just a simple adjustment?

By Paul McBride · October 13, 2024 ·

I am building a Velocity and it happens that I purchased a zero time rebuilt 250-hp Lycoming IO-540-C4B5 engine. I have been told by a maintenance shop that the only difference between a C4B5 and a D4B5 is the setting of the fuel servo. The D4B5 is rated at 260 horsepower, and they claim they can adjust the servo to convert the C4B5 into a D4B5.

Is what I’m doing protecting my aircraft from corrosion during the winter?

By Paul McBride · October 6, 2024 ·

The short running of the engine pumps heavier oil throughout the engine. Better corrosion protection is the theory. What is your opinion?

Ask Paul: My engine sounds like it has an exhaust leak

By Paul McBride · September 3, 2023 ·

A reader has two questions for Paul McBride, the General Aviation News engines expert, about the Lycoming O-235-C1B engine in an amateur-built Wag-Areo Cub.

CubCrafters debuts new engine for Carbon Cub

By General Aviation News Staff · August 17, 2022 ·

The new engine is a fixed pitch version of the larger displacement 186-hp fuel injected constant speed prop CC340 engine first introduced by CubCrafters in 2017.

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