Mercury – Quicksilver Black Diamond 3-Blade Aluminum Propeller | 10.7" Diameter x 11" Pitch | Right-Hand Rotation | Three-Blade Design | Aluminum | Black Finish | 8M0185643

Overview

There’s a kind of peace that comes with being on the water early in the morning the hum of the engine, the gentle lift as the boat glides across glassy waves, and that instant response when you throttle up. The Quicksilver Black Diamond 3-Blade Aluminum Propeller ( 8M0185643) captures that feeling. It’s smooth, predictable, and honest—no surprises, just reliable performance that keeps your day easy and enjoyable. Boaters choose this prop because it feels right. It gives your boat the control you want and the dependability you need, trip after trip.

Key Features

• Diameter and Pitch: 10.7" Diameter x 11" Pitch
• Rotation: Right-Hand.
• Blade Count: Three-Blade Design.
• Material: Durable Aluminum Construction for lasting strength.
• Finish: High-Gloss Phantom Black Finish for corrosion resistance and a clean, polished look.
• Hub System: Includes rubber hub; compatible with Quicksilver Flo-Torq II Hub Kit.
• Design Details: Precision-cast aluminum for balance, smooth acceleration, and easy maintenance.

Engine & Boat Compatibility

• Designed for Mercury FourStroke 25–30 horsepower outboards (2022 and newer, 2.17:1 gear ratio)
• Works with select Mariner and MerCruiser power setups using the appropriate hub system
• Suitable for small to mid-sized outboards up to 250 horsepower
• Perfect for runabouts, fishing boats, pontoons, and light utility boats
• Recommended for vessels with a top speed under 50 miles per hour

Performance Benefits

From the first turn of the key, you’ll feel the confidence that comes from a prop that’s well-matched to your engine. The Black Diamond delivers clean, even thrust—no chatter, no drag—just a steady pull that lifts your boat smoothly onto plane. The 11-inch pitch offers a balance between acceleration and efficient cruising, giving you that sweet spot where power meets comfort.

Once you’re moving, it stays steady and quiet. Turns feel predictable, and the boat responds naturally to your touch. The prop’s aluminum design absorbs vibration and handles small impacts without complaint, which makes it forgiving for everyday use. It’s strong enough to take a knock, light enough to keep your setup responsive, and smooth enough to make your time on the water relaxing.

Maintenance is simple, too. The Phantom Black finish stands up to salt and freshwater alike, and a quick rinse keeps it looking sharp. Whether you’re navigating shallow coves or heading out for a long cruise, this prop gives you consistent, no-fuss performance every time.

Why This Prop Is a Strong Choice vs. Alternatives

The Quicksilver Black Diamond Propeller is a staple for boaters who want reliability without overpaying. It’s built to Mercury’s OEM standards, so you’re getting factory-level engineering with real-world value. Unlike stainless steel props, this aluminum model is easier to maintain, less expensive to repair, and more forgiving if you hit debris. It’s a workhorse prop—dependable, affordable, and versatile enough to fit multiple setups through the Flo-Torq hub system.

If your old prop has lost its edge or you’re just ready for smoother handling and better response, this is the upgrade you’ll feel right away. It’s designed for the kind of boating most of us actually do—steady, comfortable, and easygoing.

FAQ

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

It’s designed for Mercury and Mariner FourStroke outboards between 25 and 30 horsepower, built from 2022 onward with a 2.17:1 gear ratio.

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

This model blends Mercury engineering with durable aluminum construction, delivering reliable everyday performance at a fraction of the cost of stainless steel.

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

The 10.7" x 11" pitch is ideal for smaller outboards that need a mix of quick acceleration and steady, efficient cruising at moderate speeds.

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

Yes. The high-gloss Phantom Black finish resists corrosion in both saltwater and freshwater environments, making it easy to maintain.

Q5: What hub system does it use?

It comes with a rubber hub and is compatible with the Quicksilver Flo-Torq II Hub System, which cushions shifting, reduces vibration, and protects your drivetrain.