Mercury – Black Max 3-Blade Aluminum Propeller | 7.8" Diameter x 8" Pitch | Right-Hand Rotation | 3 Blades | Aluminum | Glossy Phantom Black Finish | 812950A02

Overview

There is something reassuring about using a prop that just feels right — steady, smooth, and responsive, no matter where you take your boat. The Mercury Black Max 3-Blade Aluminum Propeller is exactly that kind of trusted gear. It’s designed to give smaller Mercury outboards dependable push and clean control with every run. From easing away from the dock at sunrise to exploring open water later in the day, this prop delivers quiet, confident performance that makes boating feel easy and natural.

Key Features

• Diameter and Pitch: 7.8" Diameter x 8" Pitch

• Rotation: Right-Hand

• Blade Count: 3 Blades

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

• Finish: Glossy Phantom Black Enamel that resists corrosion and keeps its shine

• Hub System: Flo-Torq I Rubber Hub System cushions vibration and protects drivetrain components

• Design Details: Balanced for clean lift, quiet cruising, and predictable handling across various speeds

Engine & Boat Compatibility

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

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

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

• Great for smooth, low-speed maneuvering, steady cruising, and easy steering in tight spaces

Performance Benefits

You’ll feel this prop’s balance the moment you throttle up. It grips the water cleanly and pulls your boat forward with a quiet, confident push that feels right under your hands. Acceleration is smooth and steady, with no chatter or hesitation, while cruising stays calm and predictable. Even when conditions shift, the Black Max keeps your boat planted and responsive.

Mercury’s Mercalloy aluminum construction is what makes this prop such a solid performer. It’s durable enough to handle everyday bumps and scrapes but still flexible enough to absorb small impacts without cracking. The Flo-Torq I rubber hub adds another layer of protection by dampening vibration and reducing stress on your drivetrain — so your ride feels smoother, quieter, and easier on your motor.

Maintenance is refreshingly simple. A quick rinse after a day on the water is usually all it takes to keep it looking sharp and performing its best. The Phantom Black enamel finish doesn’t just look sleek — it shields against corrosion, holding up beautifully in both saltwater and freshwater environments.

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

• Mercury OEM Quality: Precision-engineered by Mercury for a perfect fit and lasting reliability.

• Reliable and Easy to Maintain: Straightforward upkeep with rugged construction built for years of use.

• Cost-Effective Choice: Delivers dependable performance without the high price of stainless steel props.

• Versatile Fit: Works across multiple small Mercury outboards and boat types with ease.

• Trusted by Boaters: Known for its smooth acceleration, quiet balance, and consistent performance season after season.

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-purpose aluminum prop. Its Mercalloy construction gives it strength and flexibility, while the Flo-Torq I hub helps absorb vibration and protect your drivetrain.

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 smooth handling, quiet operation, and consistent lift, the 7.8" x 8" pitch setup is a great choice. Check your owner’s manual or local dealer to confirm compatibility.

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

Yes. The Phantom Black enamel finish protects against corrosion in both environments, keeping it sleek and durable.

Q5: What hub system does it use?

It includes Mercury’s Flo-Torq I Rubber Hub System, which cushions vibration, absorbs small impacts, and helps protect your motor’s drivetrain for a smoother, quieter ride.