A well-secured propeller isn’t just about performance—it’s about longevity, efficiency, and smooth operation on the water. The Sierra 18-4274 Prop Spacer is designed to ensure a tight, stable fit between your Yamaha outboard’s propeller and shaft, reducing vibration, preventing unnecessary wear, and enhancing overall propulsion. Built for durability, this spacer is a simple but essential component that keeps your engine running at peak efficiency.

Engineered for a Reliable, Smooth Ride

• Precision Fit – Keeps the propeller securely in place, minimizing unwanted movement and stress on drivetrain components.
• High-Quality Marine Construction – Built to handle corrosive saltwater and freshwater conditions, ensuring long-term durability.
• Optimized Performance – Helps maintain proper propeller alignment, improving thrust, fuel efficiency, and handling.

A Small Component with Big Benefits

Compatible with a wide range of Yamaha outboards (115 HP – 300 HP models), this spacer plays a crucial role in preventing excessive prop wear and ensuring smooth power transfer. Replacing worn spacers during routine maintenance helps extend the life of your prop and drivetrain, keeping you on the water longer and running at top performance.