Mxsmanic wrote:


Nothing in this quoted section mentions engines, so it doesn't answer
my question.


Those are the regulations. As it doesn't mention engines, there
is no requirement having anything to do with engines. Many people
put the beacon on when the master (not the engine) is turned on.
I used to do that as well (it's also a good reminder that your
master is on after you get out of the plane). However, I only
have strobes now, and I don't run those until I'm on the runway
now.