Thanks csc for getting the full scoop.
OK, but the checklist already contains an item to check that the throttle is fully closed before engine start. So the assumption is that someone will miss that item but remember the governor ?
I remain to be convinced that if someone starts the engine with the throttle wide open that the governor will be able to respond quick enough to prevent an overspeed anyway. Always been puzzled why they don't just fit a rev limiter.
I worked through the new list myself this afternoon, and the thing that bothers me is that the governor is now supposed to be on during mag checks at 75% - so if a student inadvertently lets the rpm drift up to 80% at this stage the governor will cut in and crank it all the way up to 104% unexpectedly. Not a desirable situation.