Mercury – Black Max 3-Blade Aluminum Propeller | 7.8" Diameter x 7" Pitch | Right-Hand Rotation | 3 Blades | Aluminum | Glossy Phantom Black Finish |812949A02

Overview

There is something special about a prop that just works — smooth, steady, and always ready when you are. The Mercury Black Max 3-Blade Aluminum Propeller is one of those pieces of gear that quietly does its job every single time. It is designed for smaller Mercury outboards, giving your boat that confident push and clean handling that makes the ride feel effortless. No matter if you’re easing away from the dock at sunrise or exploring calm waters in the afternoon, this prop delivers the dependable performance you can feel.

Key Features

• Diameter and Pitch: 7.8" Diameter x 7" Pitch

• Rotation: Right-Hand

• Blade Count: 3 Blades

• Material: Mercury’s Patented Mercalloy Aluminum Alloy for strength and flexibility

• Finish: Glossy Phantom Black Enamel to resist corrosion and keep a lasting shine

• Hub System: Rubber bushing absorbs vibration and helps protect the drivetrain

• Design Details: Balanced for smooth lift, clean grip, and reliable performance across a range of speeds

Engine & Boat Compatibility

• Fits Mercury and Mariner 4–6hp FourStroke (1999 and newer) outboards

• Compatible with 4–5hp TwoStroke (1987 and newer) outboards

• Ideal for small fishing boats, dinghies, inflatables, and lightweight utility craft

• Designed for quiet handling, steady lift, and smooth maneuvering at both slow and cruising speeds

Performance Benefits

From the first turn of the throttle, you will notice the difference. The Black Max grips the water cleanly, getting your boat moving without hesitation or chatter. It provides that smooth, predictable feel that makes steering easy and enjoyable — especially in tight spaces or shallow water. Once you’re cruising, it holds a steady rhythm, balancing power and control so you can focus on the ride, not the motor.

Built from Mercury’s Mercalloy aluminum, this prop strikes the perfect balance between toughness and forgiveness. It’s strong enough to handle everyday use — including the occasional bump against a sandbar or floating branch — but still flexible enough to absorb minor impacts without cracking. The built-in rubber bushing hub system further dampens vibration, protecting your drivetrain and keeping the ride quiet and controlled, even on longer runs.

Maintenance is about as simple as it gets. A quick rinse and basic inspection after each trip are all it takes to keep it performing season after season. The Phantom Black enamel finish isn’t just about looks — it guards against corrosion and keeps the prop’s shine, whether you’re running in saltwater or freshwater.

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

• Mercury OEM Quality: Precision-engineered by Mercury for a perfect fit and proven dependability.

• Reliable and Easy to Maintain: It isBuilt for real-world use with materials that last.

• Cost-Effective Choice: Offers excellent performance without the higher price of stainless steel.

• Versatile Fit: Works seamlessly with a variety of small outboards and boat styles.

• Trusted by Boaters: Known for its balance, quiet ride, and consistent, worry-free operation.

FAQ

Q1: Which Mercury engines does the Black Max 3-Blade Aluminum Propeller fit?

It fits Mercury and Mariner 4–6hp FourStroke (1999 and newer) and 4–5hp TwoStroke (1987 and newer) outboards.

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

The Black Max is Mercury’s trusted all-around performer. It offers a smooth, quiet ride with dependable lift and control, designed to hold up under everyday boating conditions.

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

If you’re running a 4–6 horsepower Mercury outboard and want dependable thrust, smooth low-speed maneuvering, and responsive control, the 7.8" x 7" pitch setup is an ideal choice. Check your owner’s manual or local dealer to confirm.

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

Yes. The Phantom Black enamel coating provides strong corrosion protection in both environments, keeping your prop looking great and performing like new.

Q5: What hub system does it use?

It features a rubber bushing hub system that absorbs vibration, protects the drivetrain, and cushions against small impacts for smoother performance.