Quote Originally Posted by Andy View Post
There is no need to stop the engine to test the idle mixture. Simply set throttle on idle stop, slowly lean mixture while monitoring rpm. At correct mixture there will be a small rise then rpm will reduce. As soon as peak is passed richen the mixture, run at moderate rpm, then repeat the test.

The test must be done slowly as there is a significant lag in displayed G3X data.
Here is what mine does when I lean it at idle. About a 60 RPM rise. I was finished flying so I just let it shutdown after it peaked. Interestingly the engine seemed to idle about 60-70 RPM higher at the end of a 1 hour flight versus after the runup before the first flight of the day.