Have a 21' Stingray with 4.3L 190HP. Currently have a 3 blade 14.5 x 19 which pulls good for water sports. Boat runs about 4900 RPM at WOT which is above the recommended 4400-4800 at about 40 MPH. Wanting to switch to a 4 blade prop and slightly reduce WOT into range. Wanting to keep pulling...
