Mercury – Quicksilver Black Diamond 3-Blade Aluminum Propeller | 10" Diameter x 5" Pitch | Right-Hand Rotation | 3-Blade | Aluminum | Phantom Black Finish | QA2178R

Overview

There’s something rewarding about knowing your boat will do exactly what you ask of it. The Quicksilver Black Diamond 3-Blade Aluminum Propeller gives you that kind of confidence — smooth, predictable performance you can count on every time you turn the key. It’s steady when you ease off the dock, sure-footed as you throttle up, and dependable when you need it most.

This prop isn’t trying to impress with flash or complexity. It’s built for reliability — for boaters who just want to get out on the water and enjoy the ride. Whether you’re heading out for a quick morning cruise or a slow evening drift, it delivers the kind of balance and control that makes boating feel effortless.

Key Features.

• Diameter and Pitch: 10" Diameter x 5" Pitch
• Rotation: Right-Hand Rotation
• Blade Count: 3-Blade design for steady thrust and smooth handling
• Material: Cast aluminum for lasting strength and easy maintenance
• Finish: High-gloss Phantom Black finish resists corrosion and looks sharp
• Hub System: Includes rubber hub compatible with the Quicksilver Flo Torq II system
• Design Details: Precision casting for smooth acceleration, clean lift, and reduced vibration

Engine & Boat Compatibility

• Designed for 15–20 HP Mercury FourStroke and 9.9 HP Command Thrust engines (2005 & newer)
• Works with Mercury, Mariner, and MerCruiser engines using the Flo Torq II hub system
• Compatible with Honda and Tohatsu engines when equipped with the Flo Torq Reflex Thrust Washer (part number 8M0046466, sold separately)
• Ideal for lightweight fishing boats, small runabouts, and compact utility boats
• Best suited for boats with top speeds under 50 mph

Performance Benefits

The Quicksilver Black Diamond 3-Blade Aluminum Propeller is designed to make boating simple, smooth, and dependable. When you throttle up, you’ll feel a clean, steady lift as the blades grab the water and bring your boat smoothly onto plane. There’s no jerky motion, no hesitation — just quiet, confident thrust that feels natural beneath your hands.

Once you’re underway, the ride stays balanced and composed. The prop tracks straight through calm or choppy water, giving you light, predictable steering and easy maneuvering around tight spots. The 3-blade design provides efficient thrust without excess drag, delivering a steady push that’s perfect for relaxed cruising or low-speed fishing runs.

Durability is built in. The cast aluminum body handles regular use without issue, and the Phantom Black finish keeps it protected from corrosion and small dings. Maintenance is about as easy as it gets — a quick rinse after use keeps it looking good and performing at its best. It’s a forgiving, no-fuss prop that just keeps working season after season.

Why is this prop a strong choice vs. alternatives?

• Mercury OEM quality: Built to Mercury’s precise standards for fit, balance, and long-term reliability.
• Reliable and easy to maintain: Durable aluminum and a corrosion-resistant finish make it a worry-free choice.
• Cost-effective alternative to stainless steel: Delivers strong, smooth performance without the premium price.
• Versatile fit: Compatible with multiple engine brands through the Quicksilver Flo Torq II hub system.
• Real-world dependability: Trusted by boaters for steady lift, smooth control, and lasting performance on the water.

If you want a prop that keeps things simple and dependable, this is the one. It’s not about flash — it’s about getting you out there, keeping things smooth, and bringing you back with confidence every time.

FAQ

Q1: Which Mercury engines does the Quicksilver Black Diamond fit?

This prop fits 15–20 HP Mercury FourStroke and 9.9 HP Command Thrust engines (2005 and newer), and other models using the Flo Torq II hub system.

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

It’s a practical, affordable prop known for its smooth handling, solid thrust, and easy upkeep — a go-to choice for small-boat owners.

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

If your boat runs between 9.9–20 HP and you want reliable control with easy acceleration, the 10" x 5" pitch is an excellent match.

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 for long-term protection.

Q5: What hub system does it use?

It includes a rubber hub and works with the Quicksilver Flo Torq II hub system for smooth power transfer and versatile engine compatibility.