3-blade Aluminum props are great on most boats as they offer good all around performance, better efficiency, and can achieve higher speeds. Switching from 4 to 3-blades generally requires a 1" pitch increase.

4-blade Aluminum props work well with bass, pontoon & high performance boats as they provide better acceleration, keep a boat on plane with fewer RPM's, and produce less vibration at high speeds. Switching from 3 to 4-blades generally requires a 1" pitch decrease.

Aluminum Aluminum props are a great choice for small and medium sized boats. They are inexpensive and under normal conditions can last for many years. When running your boat in an area where striking the bottom is likely, aluminum blades can flex, helping prevent damage to your engine.

Stainless steel Aluminum props are ideal for large or heavy boats and boats running in saltwater. Although more expensive than aluminum, stainless steel Aluminum props are more durable and will last longer. When running your boat at speeds over 50 mph, stainless Aluminum props will perform better than aluminum.

Diameter is the width of the circle that the Aluminum prop would make when rotating.

Prop diameter does not affect the fit of the prop on a boat.

The diameter of your Aluminum prop can vary by up to 1/2" with no discernable change in performance.

Caution: Before increasing the diameter of your Aluminum prop, make sure there will be enough clearance between the blades and cavitation plate or anode on your engine.