Forgot to say on the last post that taking the Senneca as an example, the exercising part of the check calls for the prop lever to be brought back until a 200 to 300 drop is experienced. Not the total lashing of the prop one normally hears during the average pre-take-off check. This is only done 3 times on the first flight of the day. The check then requires that the operation of the govenor is checked.
Suffice to say that such a check can not be completed at the required 2000rpm while taxiing and at the same time devoting the required time to looking out the window.
Regards,
DFC