Mercury – Quicksilver Black Diamond 3-Blade Aluminum Propeller | 9.9" Diameter x 10" Pitch | Right-Hand Rotation | 3 Blades | Aluminum | Black Finish | QA3808R

Overview

There’s a calm satisfaction that comes with knowing your boat will respond exactly how you expect — smooth throttle, steady lift, and quiet confidence as you cut across the water. That’s what the Quicksilver Black Diamond 9.9" x 10" Aluminum Propeller delivers every time you head out. It’s not about chasing speed or flash; it’s about dependable performance you can feel. This prop brings that steady, balanced power that makes each trip more enjoyable, whether you’re cruising the lake at sunrise or guiding your boat through a quiet inlet at dusk.

Key Features

• Diameter and Pitch: 9.9" diameter, 10" pitch
• Rotation: Right-Hand
• Blade Count: 3 blades
• Material: Cast aluminum
• Finish: High-gloss Phantom Black coating
• Hub System: Rubber hub included for smooth torque transfer and vibration reduction
• Design Details: Precision-balanced casting built for consistency, strength, and quiet operation

Engine & Boat Compatibility

• Designed for 20–30 horsepower Yamaha engines with 10-tooth splines
• Compatible with similar small-engine setups across multiple brands using the same spline design
• Ideal for small fishing boats, dinghies, aluminum skiffs, and light runabouts
• Best suited for boaters who want a balance of smooth control, easy handling, and long-lasting reliability

Performance Benefits

The Black Diamond 9.9" x 10" is built for boaters who appreciate smooth, reliable performance. It grips the water cleanly, delivering steady acceleration that feels natural from the moment you throttle up. There’s no jerky pull or harsh vibration — just a calm, confident lift that gets your boat on plane quickly and keeps it steady through turns and shifting currents.

The three-blade design gives the right mix of power and efficiency, letting you cruise comfortably without sacrificing responsiveness. Around docks and tight channels, you’ll feel how predictably it steers — quiet, composed, and easy to control.

The Phantom Black finish isn’t just for looks. It shields the prop from corrosion, scratches, and salt buildup, helping it stay in great condition season after season. Cleanup is simple: a quick rinse and wipe-down after a day on the water is all it takes. And thanks to its durable aluminum construction, this prop is forgiving — a light scrape or bump won’t send you looking for a replacement. It’s built to work hard, stay reliable, and keep your boating time stress-free.

Why is this prop a strong choice vs. alternatives?

• Mercury OEM quality: Crafted to Mercury’s trusted engineering standards for precision and reliability.
• Durable and cost-effective: Strong cast aluminum delivers dependable performance without the higher price of stainless steel.
• Low-maintenance finish: The Phantom Black coating fights corrosion and wear for lasting protection.
• Smooth, quiet operation: The rubber hub absorbs vibration, ensuring comfortable handling on every trip.
• Versatile fit: Works with multiple small-engine setups, offering consistent, adaptable performance.

For boaters who prefer practicality and trust over flash and hype, the Black Diamond 9.9" x 10" is the kind of prop that just works — season after season. It’s simple, tough, and designed to keep you on the water with confidence.

FAQ

Q1: Which engines does the Quicksilver Black Diamond 9.9" x 10" fit?

It’s designed for 20–30 horsepower Yamaha outboards with 10-tooth splines and may fit other engines with similar configurations.

Q2: What makes this propeller different from other Mercury options?

It’s optimized for smaller outboards, providing smooth acceleration, quiet handling, and dependable power at a value price.

Q3: How do I know if this pitch or size is right for my boat?

If you run a 20–30 horsepower engine and want a prop that offers easy control, steady lift, and efficient cruising, the 9.9" x 10" is a perfect fit.

Q4: Can this prop be used in both saltwater and freshwater?

Yes. The Phantom Black finish resists corrosion in both environments. Just rinse after saltwater use to preserve its finish.

Q5: What hub system does it use?

It includes a rubber hub that minimizes vibration, absorbs shock, and ensures smooth torque transfer for consistent, quiet performance.