seen 69 on gps boat came with 26p Mach stern driver 4 blades, motors are fresh 50hrs, have been told could pick up a couple more mph with 3 blades believe I was on the rev limiter a Lil as well, I've only had it out once since I bought it, just curious of opinions

27" pitch 3 blade mirage+labbed

Totally agree with paradise.

3 blade mirages are the prop but I'm spinnig 25's w/502's on a non-step 35. 27's might be to big.

32' a little less weight.

labbing will bring the rpms up, while turning the bigger blades... faster speeds result if the rpms are close to your peak power band.
In a perfect world, try stock 25 and 27's.. if the 27's are slightly too big, then lab.
Carder

I run 4 blade hydromotive props I have stock 502s with stainless marine exhaust and I run 79 on gps at 5250 rpm. it is a 2000 step hull.