Ordered to replace a 11.1X14 3 blade prop on my 50 HP Honda. Tried the 10.5X13 4 blade first to avoid over-propping them motor, but it performed just like the 11.1X13 3 blade I had for when more weight is in the boat. This 10.5X14 should match up for load just like the 3 blade it's replacing. Top speed should be the same with either the 3 or 4 blade judging from the behavior of the 13 pitch 4 blade. The boat does get up out of the hole better now compared to the 13 pitch 3 blade and the same load in the boat. Using on a 16' Lund Alaskan "V" bottom fishing boat.