Q: In 2004, I bought a Lycoming O-320 D1A, via Van’s, and started flying it in January 2005 in a RV-9A. I broke it in according to the instructions (75% or more until oil consumption stabilized). In spite of having an oil filter I always do oil changes at about 30 hour intervals. All through […]
Ask Paul
Ask Paul: Why is my Beagle Pup such a pig to start?
Q: I have a Beagle Pup 150 (the father of the Scottish Aviation Bull Dog) fitted with a Lycoming O-320 engine. When the weather is cold — in the UK this is anything less than 5° C — it has become an absolute pig to start, but once started it runs perfectly. The engine is […]
Ask Paul: Why are my #3 cylinder CHTs so high?
Lycoming actually does not know which cylinder runs the hottest on any particular engine installation. This is always defined by the airframe manufacturer from the various tests they conduct during the certification of the aircraft.
Ask Paul: What are these aluminum specks?
Q: I lost the left mag on my O-540. When I took it apart, I found four aluminum specks in the top oil screen. I pulled the rear housing off and found the aluminum gear still in the engine. I sent it off for repairs to Tulsa, where they installed a new oil pump, shaft, […]
Ask Paul: What’s the best engine for my Pacer?
Q: I plan to install an 0-360 with a constant speed prop in my Pacer, replacing my 0-320-A1A. I have a couple of engine choices under STCs, including the 0-360-C1A. I am looking for the lightest engine. Was this made as a narrow deck engine? If so, what serial numbers were narrow decks? Also, I […]
Ask Paul: What to do about oil-fouled plugs?
Q: My partner, Lou, and I just had our Piper PA 28 235 overhauled and are having problems with the lower plugs getting oil fouled. The plugs have been cleaned a couple of times but she runs rough and they foul again. The mechanics are talking about putting a thin wire plug in. My concern […]
Ask Paul: What’s going on with my spark plugs?
Q: I have a 1962 Piper Cherokee 160 with the O-320-D2A engine. The engine had a complete overhaul in 1992 and only 500 SMOH. In addition, 20 hours ago the engine had an annual in which an oil change was done, new plugs, and compressions in the 78/80 range. What I have noticed is when […]
How to break-in your engine
I recently received a letter asking about engine break-in following overhaul. This is a subject that should be of interest to everyone, even though you may never actually have the opportunity to break-in an engine during your flying years. It makes no difference whether it is a factory new, factory rebuilt, factory overhaul, or an […]
The importance of keeping current
Q: I have a Glasair with a Lycoming IO-360-B1E engine. After reading your article in the May 11 issue, I tried to get a copy of Lycoming’s SI1325A to see if I should change the timing from 25 to 20 degrees BTDC, but was not able to find that instruction. Can you help? RON WALTERS, […]