Recent advantages in boat propeller technology have made choosing the correct propeller for your boat both easier and more difficult--easier because the number of choices has doubled, and harder, for the same reason. The two most important things to remember in choosing a propeller are that it meet your individual needs for your individual application and that it allow the engine(s) to run within the specifiedRPM range at full throttle. Each boater is trying to meet his requirements, but ...