Not sure this will help but.....I have the 1900SR3, V6 190HP. When I bought it (new) it had the OEM 14x23, 3 blade Black Max AL prop. Boat performed great - nice hole shot, at WOT (light load) I'd get about 4700-4800RPM and @52mph (GPS). It would yank either of my grown sons out of the water on skis ok but with a "full" load it was, as you would expect, a bit slower out of the hole. My tech recommended a "prop guru" to me. The guy suggested that I try a 14.25x19, 4 blade AL (Solas) and wow.....with a medium load the boat just blasts out of the hole, I reached about 4900RPM and top speed was about 49mph(GPS). Have not yet been able to test it with the "full load" and a skier but am hoping to soon. Obviously, with a light load, I do have to watch the RPM to make sure I don't over rev. I was a bit skeptical about the dramatic drop in pitch but so far, so good. And, I DO notice the boat seems to handle better and is more responsive around the dock (slow speed) with the 4 blades. The "guru" also said that while I have to watch the RPMs when loaded lightly, I am not hurting the engine using the new prop with just the admiral and me (of course the mpg isn't as good as it would be with the OEM prop). Good luck.
Same admiral since 1973
New Boat 8/13/11: Chaparral 206SSI with 5.0 VP GXI SX
Prior Boat: 2008 Maxum 1900SR3, 4.3L V6 190HP, Alpha 1 (great boat)
2010 Ford 150 XLT Super Crew 5.4L V-8, tow package
2008 Infiniti G-35