Hello long time lurker and finally getting around to posting. I have a 2005 2520 SL with the notched transom. The motor is at the 2nd from top hole on the transom. The motor is a yamaha 250 4 stroke. I was thinking about upgrading from the stock yamaha prop to a merc rev 4 17 pitch. I was wondering if anyone has had experience with this kind of upgrade on a notched transom and if they had good experience. I did a search of the forum and did not see anyone doing a prop upgrade on a 2520 SL with a notched transom. Thanks in advance.