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Ask Paul

Ask Paul: One and done

By Paul McBride · October 22, 2023 ·

I’ve recently been experiencing a starting problem with my Mooney 201. The first start of the day is typical. However, after the first flight, it most likely will not fire.

More on Lycoming’s XR-7755 engine

By Paul McBride · October 15, 2023 ·

When Joy Hobbs sent in a photo of her grandfather and his co-workers by Lycoming’s XR-7755-3 engine, it attracted a lot of comments from General Aviation News readers. Our Lycoming expert gives us some more insight into the largest aircraft engine ever built.

Ask Paul: A strange situation

By Paul McBride · October 8, 2023 ·

After the engine sat for several years without being run, it began to backfire about 20 minutes into a test flight.

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.

The men who built the largest piston engine in the world

By Paul McBride · August 6, 2023 ·

Question for Paul McBride, the General Aviation News engines expert: My grandfather, Russell Leuck, worked at Avco Lycoming Engines in 1943. I found a picture of him with a group of men with the XR-7755 engine. I was wondering if you would possibly have any thoughts in regards to how he would have been helping with this project?

Would a synthetic oil be beneficial to my RV-7A’s engine?

By Paul McBride · July 30, 2023 ·

I have an O-360 Mattituck (experimental) engine installed on my RV-7A. I have been using Aeroshell W100 Plus for more than 15 years. I have been using mogas solely for more than 10 years now, so no fear of lead deposits. This is my question: Would the use of fully synthetic (racing) oil be beneficial?

Ask Paul: You can’t get there from here

By Paul McBride · July 19, 2023 ·

I have read Lycoming Service Instruction 1304J and wondered if I can expect to find a Form 337 for an engine on the CD the FAA sent me with the aircraft records for a Cessna 172. The engine once had the following on the data tag: O-320-E2CC. I am told the engine was converted to an E2D per the logs. 

Asking questions before you start an aircraft project will save you money

By Paul McBride · July 5, 2023 ·

The Lycoming IO-540-AB1A5 has a rating of 230 hp at 2400 rpm. Can I just change the governor and increase the RPM to 2700 (like the D4A5) to get 260 hp or do more technical modifications need to be done?

After replacing almost everything in my engine, why is there metal in my oil filter?

By Paul McBride · June 21, 2023 ·

My advice to all who have or will experience metal contamination in an engine: Replace the oil cooler and hoses rather than taking a chance.

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