The prop on my 2004, 5.0L (220HP), Mercruiser Alpha 1 drive is stamped with the following part number: 48 832830A45 19P<br /><br />I found out that this is a 14.5" x 19 Pitch, Aluminum, Mercury Marine Black Max prop. Does anyone know if this is a cupped prop? My prop appears to be cupped but...