"Lisa" wrote in message ...
Perhaps this doesn't matter much for a non-turbocharged engine,
but an instructor says that it is best to idle the engine at
1,000 RPM for a few moments before Mixtu Idle Cut-Off at that
RPM to shut down.

The POH says throttle full aft, then mixture cut-off to shut
down.

I run at 1100 RPM just before shutdown, set the throttle
lock, and then pull the mixture back. This way, when I
restart on a cold day, I know that the engine will fire and
idle nicely at 700 RPM without overrevving or conking out.
This minimizes engine wear on startup.

Not sure I agree with posts (from Lycoming recommendation)
which suggest high RPM. Too much risk of damage to the
prop.