How Do You Figure A Boat Propeller?
Choosing a boat propeller can be difficult. Propeller selection depends on your needs. You may need a general prop designed for many purposes or a specialized prop for a specific application. Every motorboat owner should know some of the basic configurations and designs before buying a propeller. Consult your boat owner’s manual for the stock propeller that mounts on your engine. Write down the numbers that indicate the propeller diameter, pitch, cupping angle (if included), and metal makeup, such as aluminum or stainless steel. Note whether your propeller has a two-, three-, four- or five-blade configuration. Look on the propeller hub. You will see two numbers, something like 10 X 16, for example. The first number is a size increment which indicates the diameter of the propeller. The diameter number equals twice the distance from the center of the hub to the outside tip of the propeller blade. It can also be envisioned as the distance from one end of the propeller to the other as it f
