It is important to understand the design of a propeller to help solve the performance problem that might occur when a ship is driven under power. A propeller must be well-suited for your boat and soon as you realize this 7.5 X 4 P3R PROP 125990 prop is a perfect choice. Just go and replace it. Consider specifying the correct type and size of a propeller suitable for your boat. This is a 7.5 diameter, 3-blade propeller at pitch 4. Key Features: 7.5 Propeller s Diameter: With a lower diameter, it will increase engine wear, impact the fuel community, and reduce forward motion that will spin at the desired RPM. It is also intended for faster boats. Plastic Material Propeller: Using plastic for the propeller is a more affordable or cost-effective material because it is durable, anti-corrosion, and offers the best performance propeller. It is almost the same with aluminum material. Strength and Durability: This 4 pitch propeller will move 4 inches forward in one revolution. Consider a lower pitch propeller for boats under revving. Specifications: SKU: 125990 UPC: 745419000387 Weight: 0.50 LBS Material: Plastic Pitch: 4 Diameter: 7.5 Number of Blades: 3 General Usage-WeedlessEngine ApplicationJunior 1.5-2 Horsepower 1968-90