I just checked the Service Instruction list at Lycoming’s website and SI 1294, which you referred to in the Jan. 25 GAN (What do to about a “”slightly”” rough running engine), is not listed.
My Piper Colt has a strong odor of engine exhaust in the cockpit. The mechanic says he is sure the muffler is good, and turning off the heater does not change the amount of odor.
I always look forward to hearing what you have to say, so here is my question: I fly a 1954 Piper PA-22/20 with an O-320 (no suffix) Lycoming, with about 975 hours since major. I fly it 150 to 175 hours per year, and keep up with all the maintenance an old ship requires. The engine runs beautifully, takes about 1/2 quart of oil between changes, has no leaks and has good compression. However, when I pull back the power for a long descent (2,300 to 2,100 rpm), I get a “”slightly”” rough running engine. If I reduce further, to 1,500 or so, it smooths out. I had the prop statically balanced at a reputable shop and it seemed to help a little, but I was wondering if dynamic balancing would be the next place to look, or is there another direction?
I probably will buy a C-172 with a new — actually rebuilt — O-310-H2AD engine. Do you know if this engine is reliable? Does it meet the latest factory changes?
This seems like a stupid question but I’m going to ask anyway. Did Lycoming ever have a service kit to put hydraulic lifters into the O-235?
I have an O-235 Lycoming engine. The assembly case has not been drilled to accept an oil cooler.
QUESTION: I have a question on my IGO-540-A1A, an engine with a rated RPM of 3,400. When it comes time for an overhaul, S.I. 1037K calls for intake valve LW-12949.
For those of us who reside in northern climates, it’s time for us to begin thinking about what we need to do to get our aircraft ready to put in the barn for the winter.
QUESTION: I have had instructors insist that I lean the engine while taxiing my O-320 Lycoming.
QUESTION: A friend has an O-320 in his hangar. I have only the following data, and am wondering how or where I can use these data to determine exactly which engine this is. Data plate says: O-320, eng #2689-27. The case is cast with the number L-17001-27A. I tried using the Lycoming website, hoping for a serial number lookup table, but so far no luck.