"Jim Macklin" wrote in message
news:Wgcwf.40975$QW2.5751@dukeread08...
point and then pull the mixture to shut it down. That
should show a slight 25-50 rpm increase just as it shuts
down since idle should be a little rich.


For my TIO540-S1AD, Lycoming says five rpm, not more than ten.

Stan