If your running 5200 with a 23" you probably be better of with a labbed 25"

Depending on how its labbed, a 25 could run even higher than a 23.. Best thing I ever tried on my baja was a labbed 26 B1, sure the rpms were a bit low but I got a best ever of 65 mph on GPS, where as with a 23 mirage plus I was usually around 62. hole shot and handling were MUCH improved over the 3 blade also..

Try a 22" Turbo Vector that's what I had on my 25' with the same power,great prop,ran right at 5050 rpm and ran 67.5 on gps.Precision Propeller 800-922-9955 you won't be sorry.

Well all I can say is ask the experts, at mercury , or yorks or bronson hill and use trial and error, I tried all those on my 24, with a 502 and light mods and the 26 bravo labbed by bronson hill spun a wopping 4400, The best for me was a 23 spinning 5200 ( rev limiter was raised to 5400), Ive spent money on it and done some research and I almost always return to a mirage, however right now I am running Hydromotive QIV's on my 32

liquid is right or Bajaneil,If you lab the 23 Mirage it will need pitched to a 24 ,We have found in most cases the 25 labbed or not is just too much prop.Or the 22 Bravo-one works well labbed and pitch to a 23 .The labbed 24 B-1 is a little on the low side even labbed and loaded down,The 3 bld is the fastest,but the handling is nothing near the four bld.It just depends on what you want all out top end or a all around prop.