I am trying to slow my boat down a knot or 2. I currently have 24" dual 3 blade SS props. WOT is roughly 4400 to 4500 rpms going 40 mph, Pursuit 2860, 7.4L MerCruiser. The trolling speed is just a little to fast for stripper fishing. I know downsizing props will rise my RPM and I would have...