Mercury – Quicksilver Black Diamond 3-Blade Aluminum Propeller | 12.5" Diameter x 23" Pitch | Right-Hand Rotation | 3-Blade | Aluminum | High-Gloss Black Finish | QA2042X

Overview.

There’s something deeply satisfying about a prop that just feels right — smooth, balanced, and responsive from the first touch of the throttle. The Quicksilver Black Diamond 12.5" x 23" Pitch Propeller (QA2042X) is one of those dependable workhorses you can trust season after season. It doesn’t try to impress with flash — it simply performs, giving your boat steady lift, clean acceleration, and that confident feel every boater looks for. Whether you’re cruising open water or chasing the next fishing spot, this prop makes every trip feel effortless.

Key Features.

• Diameter and Pitch: 12.5-inch diameter, 23-inch pitch.
• Rotation: Right-Hand.
• Blade Count: 3-Blade design for smooth acceleration and consistent lift
• Material: Durable aluminum for strength and efficiency.
• Finish: High-gloss Phantom Black for corrosion resistance and lasting shine.
• Hub System: Compatible with Quicksilver Flo-Torq II hub system (sold separately)
• Design Details: Precision-cast aluminum construction for smooth performance and long-term reliability.

Engine & Boat Compatibility.

• Designed for 40–60 HP Command Thrust and 75–125 HP Mercury outboards
• Compatible with Mercury, Mariner, and MerCruiser engines
• Fits other engine brands when using the Quicksilver Flo-Torq II hub system.
• Ideal for runabouts, fishing boats, and mid-size pontoons
• Recommended for boats with top speeds under 50 mph
• Suitable for both saltwater and freshwater environments

Performance Benefits.

The Mercury Quicksilver Black Diamond 23" Pitch Mercury propeller is built for boaters who want strong, predictable performance without overcomplication. When you throttle up, you’ll feel the prop bite instantly a clean, sure grip that lifts your boat onto plane with confidence. Acceleration feels natural and steady with just the right balance of power and control.

At cruising speed, the prop really shines. Its 3-blade design keeps the ride smooth and predictable, even when the water gets choppy It tracks straight through turns maintaining consistent thrust and minimal vibration. You’ll feel the difference in the helm responsive steady, and easy to control no matter the conditions.

The refined blade geometry helps reduce drag and improve fuel efficiency, turning engine torque into clean, forward thrust. That means less strain on your motor, smoother cruising, and longer days on the water without constantly watching the fuel gauge.

This prop’s Phantom Black finish isn’t just for looks it’s built to resist corrosion and protect against minor wear and tear. It holds up beautifully in both saltwater and freshwater environments, making it ideal for everyday use. And because it’s made of lightweight aluminum it’s easy to maintain, repair, or replace without breaking the bank.

Why is this prop is a strong choice vs. alternatives?

The Quicksilver Black Diamond QA2042X is the perfect blend of practicality and performance. It’s Mercury-engineered to deliver dependable thrust, smooth handling, and consistent efficiency all at a price that makes sense for the everyday boater.

Compared to stainless steel propellers, this aluminum design offers a more forgiving experience if you bump into shallow water or underwater debris. It’s lighter, easier to service, and still provides the kind of reliable performance Mercury props are known for.

Whether you’re upgrading from a worn prop or keeping a spare for peace of mind, the Black Diamond 12.5" x 23" Pitch model is a solid choice. It’s designed for real-world boating — no gimmicks, no unnecessary fuss just smooth, steady power and dependable control every time you launch.

If you’re looking for a prop that feels balanced, efficient, and built to last, this one checks every box.

FAQ

Q1: Which Mercury engines does the Quicksilver Black Diamond 23" Pitch Propeller fit?

This prop fits 40–60 HP Command Thrust and 75–125 HP Mercury outboards, and can be adapted for other brands using the Quicksilver Flo-Torq II hub system.

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

It offers reliable, all-around performance in a durable aluminum build — combining strong acceleration, easy handling, and low maintenance at a great value.

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

If your engine falls within the 40–125 HP range and you’re looking for smooth planing, steady cruising, and fuel-efficient operation, the 23-inch pitch is a great match.

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

Yes. The high-gloss Phantom Black finish provides excellent corrosion protection in both environments.

Q5: What hub system does it use?

The Quicksilver Black Diamond 12.5" x 23" Pitch Propeller uses the Flo-Torq II hub system, offering compatibility across multiple engine brands and smooth, secure installation.