Leaning for taxi

What do folks think of this procedure? Can it harm the engine? It's a
Lycoming O320-D2G in a Skyhawk. Thanks in advance.


We're running an O-360 with an Ellison throttle-body injector... after start
we just pull the mixture nearly all the way out and taxi around like that
(the engine really doesn't like full rich on the ground). It stays there
till runup, and then after landing I usually lean out even before I clear
the runway. The RPM gain is significant when I do this; a full-rich idle
will sit somewhere between 500 and 600, and after leaning it will go to
around 900. With the mixture full out, you can get up to about 1300 RPM
before it starts to sag--this is good for clearing the plugs at the end of a
flight just before shutdown.