I recently re-powered a 1998 Mitzi 15 with a 2020 Suzuki DF30a. The stock prop is a 3 blade 10.25" x 12p.
My hole-shot is pretty lousy with this prop. The second person has to sit on the bow until I get on a plane. Cruising and wide-open performance seems fine.
The DF30a RPM range is spec'd at...