Propping is trial and error to find the best all around prop.
For starters, try a 22" RX-4 and make sure the motor is mounted higher than most others due to its low water pickups and built-in setback. Many dealers make the mistake of mounting a G2 in the same holes as a motor that it replaced. A water pressure gauge is a good option to have.
-- Travis McGee, main character in a book series by John D. McDonald
The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.