Mark Hansen wrote:

I thought that actually shutting off the engine during a simulated
engine out situation was really frowned upon?


It probably is frowned upon by some. IMHO, If you really want to
shut the engine off during a glide, you should use the mixture. With
only the ignition off, the fuel/air mixture is still cycling through
the cylinders and soaking your plugs.

John Galban=====N4BQ (PA28-180)