T/O power and leaning mixture on the ground to clean plugs?
With a Cessna 152 suffering from rough running on one mag during runup, the advice of a (highly experienced) FI was to set T/O power and lean the mixture to max EGT for about two minutes on the ground (as soon as oil temp is in the green and paying attention to what is behind you WRT propwash, of course). While I can see how this might get the job done, is this not too harsh on the engine? Or am I just too timid and shy?