ESSENTIAL DATA REQUIRED
When posting a question about propellers, you cannot get a reasonable answer unless you provide the following information in your post: Items 1-4 are essential for meaningful response to most questions.
1) Performance issue you are trying to correct.
2) Current prop manufacturer, model, aluminum or stainless as a minimum.
3) Current prop diameter and pitch (required).
4) Wide open throttle RPM and speed with an average load (very helpful)
5) Engine/drive make, model, year, and HP
6) Boat make model, year, length and weight
The above info gets you where you want to be quickly and precisely now most do not want to go so here's a WAG a 21pitch stilletto or HR Solas would be a good choice but one never knows until a good solid foundation is used as a starting point...By the way the 21 is with 1.5 gearing on the leg and should take you to a WOT of 55/57 mph at 8/9% slip