Mercury – Quicksilver Black Diamond 3-Blade Aluminum Propeller | 15.5" Diameter x 18" Pitch | Right-Hand Rotation | 3 Blades | Aluminum | Black Finish | QA2014X

Overview

There’s a moment every boater knows—the throttle opens, the engine growls low, and your boat surges forward, steady and sure. That’s where the Quicksilver Black Diamond 15.5" x 18" Aluminum Propeller shines. It’s the kind of prop that gives you confidence every time you leave the dock—smooth acceleration, steady lift, and consistent control no matter the water. Designed with Mercury’s trusted craftsmanship, it’s a prop that blends performance with practicality, letting you focus on the ride instead of worrying about what’s turning beneath the surface.

Key Features

• Diameter and Pitch: 15.5" diameter, 18" pitch
• Rotation: Right-Hand
• Blade Count: 3 blades
• Material: Durable cast aluminum
• Finish: High-gloss Phantom Black coating
• Hub System: Quicksilver Flo-Torq II (multi-brand compatibility)
• Design Details: Balanced, precision-cast propeller built for boats up to 250 horsepower and top speeds under 50 mph

Engine & Boat Compatibility

• Designed for 90–115 horsepower Command Thrust outboards and 150–300 horsepower Mercury or MerCruiser engines
• Compatible with Mariner and other power systems using the Flo-Torq II hub system
• Refer to the hub selection chart for exact model fitment
• Excellent for runabouts, offshore fishing boats, pontoons, and family cruisers that demand balanced speed and control

Performance Benefits

From the moment you throttle up, the Black Diamond 15.5" x 18" delivers that unmistakable Mercury feel—firm, responsive, and steady. Its three-blade design creates a smooth transfer of power, getting your boat on plane quickly without harsh vibration or lag. Once you’re cruising, it holds a steady rhythm, keeping your boat tracking straight through turns or light chop.

There’s a certain ease in how this prop handles transitions—smooth when you’re idling near shore, quick to respond when you need to push ahead. You’ll notice its grip in the water, especially when maneuvering through crosswinds or varying currents. That balance of lift and thrust makes every run feel composed and confident.

The Phantom Black finish doesn’t just look sleek—it works hard too, resisting corrosion, salt, and abrasion. Maintenance is as easy as a rinse and wipe-down. And because it’s made of high-quality aluminum, it’s forgiving. If you scrape a rock or bump a sandbar, repairs are simple and cost-effective—unlike stainless props that can punish mistakes with a hefty bill.

Why is this prop a strong choice vs. alternatives?

• Mercury OEM quality: Engineered with the same precision and reliability found in factory-installed Mercury propellers.
• Durable and affordable: Aluminum construction delivers dependable performance at a much lower cost than stainless steel.
• Versatile fit: The Flo-Torq II Hub System makes it easy to adapt across different engines and configurations.
• Low-maintenance design: The Phantom Black finish fights corrosion and keeps the prop looking new.
• Real-world reliability: Ideal for boaters who want smooth handling, strong acceleration, and years of dependable service.

If you’re the kind of boater who values consistency over flash—who just wants a prop that performs without a fuss—the Black Diamond 15.5" x 18" hits that sweet spot. It’s durable, forgiving, and built to handle whatever your weekends bring, from family cruising to long fishing runs.

FAQ

Q1: Which Mercury engines does the Quicksilver Black Diamond 15.5" x 18" fit?

It’s designed for Mercury and MerCruiser engines ranging from 90 to 300 horsepower, including Command Thrust outboards, when paired with the Flo-Torq II hub kit.

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

It’s built for balance and value—delivering smooth, steady performance without the price tag or rigidity of stainless steel models.

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

If your engine falls between 90 and 300 horsepower and your top speed is under 50 mph, the 15.5" x 18" pitch provides ideal lift, efficiency, and control.

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

Yes. The high-gloss Phantom Black finish resists corrosion in both environments. Just rinse after saltwater use to maintain its shine.

Q5: What hub system does it use?

This prop uses the Quicksilver Flo-Torq II Hub System, allowing seamless installation and compatibility across multiple engine brands.