Cessna 182s have been burdened by a 1,500 hour TBO for many years. However, the O-470-U engine is now available with a 2,000 hour TBO. What possibly could they have done to the engine to extend the TBO by 33%? MARC COAN Taos, N.M. While my background is primarily in Lycoming engines, I think […]
What’s the best oil for my engine? Our oil expert weighs in on this reader’s question
I have a Lycoming AEIO-360 in my Pitts S1S. I have been running AeroShell 100W Plus for years. Some buddies I fly with have been using an Amsoil oil (I’m not sure the number). What is the best oil and weight to run in this engine? Thanks. CHUCK ROBERTS via email Chuck, yours is one […]
How can I fine-tune idle mixture?
How about a discussion of the scalloped wheel on the injector pump for an IO540-C4B5 engine? My engine will “”load up”” at idle and I have to run the rpm up to about 1,200 quite often during taxi. Also the engine will “”talk to you”” on final with the throttle closed. I have tried the […]
What is normal oil consumption?
I have a 2005 Robinson R-44 Clipper II that I purchased new. The engine is a 540 injected Lycoming. I broke the engine in on mineral oil as suggested and changed to ashless oil after the initial 50 hours of break in. The ship has used about 1 quart of oil per every four hours […]
What parts can I use in my 1955 engine?
My 1955 Tri-Pacer original Lycoming O-320 engine was torn down and inspected. It has a Part No. 74166 camshaft gone bad (#3). I found a P/N 76097 camshaft. Is it OK to use this part number for the engine? WENDELL HAMILTON Broken Arrow, Oklahoma Wendell, to answer your question, no, you cannot use the P/N […]
Confused about replacement parts?
Q, I have a Lycoming O-320 150 hp engine with no suffix in my PA-22 Tri-Pacer. In one of your articles you list the O-320-A1A and the O-320-A3A as the numbers to refer to for replacement parts. Lycoming does not list an O-320-A1A and shows the O-320-A3A fitting a Piper PA-23. Lycoming lists the O-320-E3D […]
The XR-7755: The whole story
I was reading about the XR-7755 on the Internet and was wondering if you would clear something up for me. Most sources say there were two engines made, but I’ve found there were three versions. The first was set up for a single output shaft, a second had contra-rotating shafts and the third was set […]
Can we convert from dual mag drive to separate drives?
Can we convert a Lycoming O-540-J3A5D from dual mag drive to separate drives? Can it be done on a 1980 Dakota 236? Our club, The Flying 20 Club of Danbury, Conn., has three planes, a Dakota and two Archers. Recently,during the overhaul of one of our Archers, N8198P, we had the plane equipped with the […]
Confusion abounds on difference in rocker arms
I’m confused about the rocker arm differences on the O-360-A4K parallel valve cylinders because I know about the extreme heat that the exhaust valves endure. My question is why does the intake rocker arm #69444 have the extra oil hole that leads to the intake valve shaft to cool and lubricate it while the exhaust […]