If you are a boater that only requires a propeller that delivers maximum speed and have no concern with water skiing and water sports, than a three blade propeller is a good choice and will perform to your expectation. If you desire a good performing propeller that delivers better acceleration with out a significant amount of top speed loss then we recommend a four blade prop. If you desire good top speed and maximum thrust, as well as smooth operation for water skiers, and cost is not a concern then the mercury high five is our recommendation.