Ash,

causing cylinders to
run overlean and fail.


NO, NO, NO!!!

Running "overlean" does NOT hurt cylinders! This is the core of the OWT
surrounding all this. Run the cylinder leaner and leaner - and it will
get cooler until combustion quits. A little more correct would be to
say "not running lean enough and fail". The correct description is
"changing the mixture to a point where the temperatures and pressures
in the cylinder failed it". But this is in NO WAY the leanest point, or
"overleanest" - whatever that may be.

--
Thomas Borchert (EDDH)