Ask Paul: What spark plug is best for my airplane?

Posted on September 4th, 2014 by

Q: Can the Champion 37BY plug (either REM or RHM) be used on a Lycoming O-360 A1A engine? My concern is that the piston may hit the plug tip. Is this a valid concern? DAVID M. GITELMAN, via email Continue Reading →

Ask Paul: The oil filter debate continues

Posted on August 21st, 2014 by

In the July 5 print issue of General Aviation News, reader Dennis Reiley offered his thoughts in Letters to the Editor about my column, “Does my engine need an oil filter?” Here’s a bit of what he had to say:... Continue Reading →

Ask Paul: Tips to troubleshoot high oil temps

Posted on July 23rd, 2014 by

Q: I have a 1998 Maule with an O-360 engine. I have the original needle oil temperature gauge, as well as a JPI-730 engine analyzer, and they both read the same temperature during all phases of flight. My annual was... Continue Reading →

Ask Paul: Does my engine need an oil filter?

Posted on June 15th, 2014 by

Q: I just purchased a 1978 Citabria 7ECA with a Lycoming O-235-C1. Just had my first oil change done — it has no oil filter! Just one, maybe two, screens.  Are these screens just as effective if I change my oil... Continue Reading →

Ask Paul: How should I handle chromed cylinder removal?

Posted on May 19th, 2014 by

Q: When an engine with chromed cylinders comes into a shop with oil leaks and the source has been identified as thru bolts and cylinder base o-rings, how should the cylinder removal and reinstallation be handled? Also, is there any wisdom... Continue Reading →

Ask Paul: What is causing mag drop?

Posted on May 13th, 2014 by

Q: I work on a IO-360-MIA Lycoming engine. My problem is that the right mag has a drop of 220 rpm. I have done internal timings, engine to mag timings, ignition leads check and cleaned the plugs. I have done... Continue Reading →

Is there an STC for a primer system for my engine?

Posted on April 24th, 2014 by

Q: I have been looking for a possible STC to install a primer system on a O-320-A2D. Would you know of one? JERRY BARNHILL, Longville, La. Continue Reading →

Ask Paul: Why is my engine oil creamy?

Posted on March 31st, 2014 by

Q: I am doing a 100-hour inspection on a Piper Aztec with TSIO 540 Lycomings using Shell 15/50 oil with 50 hours on the oil. They are both midtime engines on this photo plane. They fly six hours a day... Continue Reading →

Ask Paul: What’s causing vibration?

Posted on February 19th, 2014 by

Q: I recently installed a new three-blade propeller in my Comanche 250 with an O-540 engine. After the first flight I noticed a vibration when I decrease the rpm to 2400 or below, so I had the prop dynamically balanced.... Continue Reading →

Ask Paul: What’s the TBO on my engine?

Posted on January 9th, 2014 by

Q: I have obtained a 1978 Bellanca 7GCBC with a Lycoming 0-320-A2B engine manufactured in 1977. I am attempting to learn more about this engine, including why the log book contains an entry at the 1,200 hour mark showing the... Continue Reading →