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 I taxi the airplane without flying it (I always lean on taxi), the next time I do a run-up the left mag performs poorly and I have to lean and “burn off” whatever is getting on the plug(s), then the airplane runs fine. This has happened to me twice recently. [Read more…]