acam37
Well Known Member
I have a freshly overhauled 0320E2G with new slick mags, New Kelly Aerospace ignition harness and 8 brand new Tempest plugs. The issue I'm having is even after aggressive leaning while taxiing to the runway, the engine run-ups indicate the typical lower oil fouled plugs. The engine runs fine on both mags but cutting one mag it runs like (you know what). Post flight taxi back to the hangar and it runs rough again. This engine only has 4.5 hours total time and has channel chrome cylinders. We are breaking the engine in over the airport at 4000' and 75% power, staying as close to the break-in procedure as possible trying to avoid the dreaded glazed cylinders. My question is, does this sound typical or should I be concerned? The lower plugs are dark black (indicating rich condition) and usually full of oil after I pull them.