Mercury – Quicksilver Black Diamond 3-Blade Aluminum Propeller | 14.3" Diameter x 21" Pitch | Right-Hand Rotation | Three Blades | Aluminum | Phantom Black Finish | QA1918X

Overview

There’s something deeply satisfying about a propeller that simply does what it’s supposed to — no overthinking, no complications, just smooth, consistent power every time you hit the throttle. The Quicksilver Black Diamond 3-Blade Aluminum Propeller is that kind of prop. It’s the quiet workhorse of the boating world — dependable, balanced, and built to keep your boat performing the way it should. From the moment your boat eases onto plane to the steady hum of a long cruise, the Black Diamond delivers the kind of confidence that keeps you on the water longer and worrying less about what’s below the surface.

Key Features

• Diameter and Pitch: 14.3" Diameter x 21" Pitch
• Rotation: Right-Hand Rotation
• Blade Count: Three Blades
• Material: High-strength aluminum alloy
• Finish: High-gloss Phantom Black finish for corrosion resistance and durability
• Hub System: Compatible with Quicksilver’s Flo-Torq II Hub System
• Design Details: Precision-balanced three-blade geometry for clean acceleration, strong lift, and steady all-around performance

Engine & Boat Compatibility

• Designed for 90–115 HP Mercury Command Thrust outboards
• Compatible with 150–300 HP Mercury and MerCruiser engines
• Works with most outboards and sterndrives up to 250 HP
• Ideal for runabouts, center consoles, pontoons, and fishing boats
• Performs consistently in both freshwater and light saltwater conditions
• Recommended for boats with top speeds under 50 mph

Performance Benefits

The Quicksilver Black Diamond 3-Blade Aluminum Propeller is all about that balanced, dependable feel — the kind of performance you notice not because it’s flashy, but because it just feels right. When you push the throttle, it grabs the water cleanly and pulls you onto plane without hesitation. The acceleration is smooth and even, giving you confident control at every step.

Once you are moving, the prop’s balanced geometry takes over. The three blades work together to reduce drag and vibration, keeping your boat steady and quiet even through light chop or shifting wind. It holds its grip in turns and stays responsive when maneuvering in tight spaces. There’s a calm confidence to the way it performs — firm when you need it, forgiving when the water gets unpredictable.

Durability is where the Black Diamond really earns its name. Built from high-strength aluminum and finished in Quicksilver’s sleek Phantom Black coating, it resists corrosion, scratches, and the wear of everyday boating. It’s tough enough for shallow-water scrapes but light enough to protect your drivetrain from hard shocks. Maintenance is simple — a rinse and inspection after each trip keeps it performing season after season.

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

If you’re looking for a Mercury propeller that delivers solid performance without the stainless-steel price tag, the Black Diamond 14.3" x 21" Aluminum Propeller is a clear winner. It’s Mercury OEM quality — precise, balanced, and dependable — built for boaters who want reliability more than flash.

You’ll get smooth takeoffs, easy cruising, and consistent handling whether you’re running solo at dawn or taking family out for a weekend ride. It’s a versatile, real-world prop designed for everyday boaters — the kind who value practicality, longevity, and performance that feels effortless.

The Black Diamond isn’t trying to be the loudest upgrade — it’s the one you can rely on. Once it’s on your boat, you’ll understand why so many Mercury owners never switch back.

FAQ Section

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

It’s designed for 90–115 HP Mercury Command Thrust and 150–300 HP Mercury/MerCruiser engines and works with most outboards up to 250 HP.

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

The Black Diamond offers balanced performance, dependable acceleration, and long-term durability — ideal for everyday boating at an affordable price.

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

If your current prop lets your engine reach its recommended RPM range, this 21" pitch version will maintain strong performance and efficient cruising.

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

Yes. The Phantom Black finish protects against corrosion and wear in both environments. A quick rinse after saltwater use keeps it looking great.

Q5: What hub system does it use?

It’s compatible with the Quicksilver Flo-Torq II Hub System, which helps absorb impact, reduce vibration, and protect your drivetrain for smoother operation.