Jeffrey,

Typical cruise power setting is 20"
manifold pressure 2300 RPM.

Wow! Why so low?


Can someone please give me the proper leaning procedure for both cruise
flight and ground operations (taxing)?


For taxi: lean right after start-up and stabilized RPM very aggresively
until a slight rise in RPM occurs. If you lean any further, the engine
should quit. The RPM rise should be around 25 RPM. If it is higher, have
your idle mixture adjusted. If you advance the throttle for the mag check,
the engine will stumble because it is so lean. That's GOOD because it
reminds you to enrichen again for take-off power. You cannot hurt the
engine by leaning at taxi power.

For flight: Lean whenever the power is below 75 percent. Lean until the
first cylinder peaks (that's not identical with the cylinder having the
highest EGT, it is the first cylinder whose EGT goes down again during
leaning). Then leave the mixture there if the engine runs smoothly or
enrichen until abojut 100 F rich of peak.

Have you read John Deakin's columns on engine management at www.avweb.com?

--
Thomas Borchert (EDDH)