Chris
I see several responses already to your query about propeller shaft noise. My understanding is that it is much better to put the gear in reverse, which will stop the propellor from spinning, and a good reason to do this is that the gear box is not lubricated when the engine is not running, so it is easier on the gears to have the shaft stationary.
Greg Silver
Misty Cat NS 26 #121
Cape Breton