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.
Lycoming
Can I Boost My Engine’s Horsepower?
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?
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?
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?
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?
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?
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
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
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.









