"O. Sami Saydjari" wrote in message
...
I just received a booklet from TCM called "Tips on Engine Care" (a very
good book...available from TCM's website...http://www.tcmlink.com/). On
page 12 it says "Never but never attempt to "burn out" a magneto drop
with ground run-up. This 'time-honored' procedure succeeds only at the
expense of the engine's mechanical health."

Well, I was taught this time-honored way. What the book does not say is
what you are supposed to do when you get roughness in one magento. Ideas?

Really? Does the book say how this will hurt the engine's mechanical health?
To be honest, this "time-honored procedure" seems to have no effect
whatsoever on whether engines make it to TBO or beyond.