Mercury – Black Max 4-Blade Aluminum Propeller (Black) | 8" Diameter x 5" Pitch | Right-Hand Rotation | 4 Blades | Aluminum | Glossy Phantom Black Finish | 812954A10

Overview

There’s something special about having total control over your boat — that easy, responsive feel when every turn and throttle adjustment does exactly what you want. The Mercury Black Max 4-Blade Aluminum Propeller is built for that kind of precision. Designed for kicker motors and smaller outboards, it gives you the smooth steering and steady speed control you need for trolling, docking, or slow cruising. It’s dependable, forgiving, and built with the same Mercury craftsmanship trusted by boaters for decades.

Key Features

• Diameter and Pitch: 8" Diameter x 5" Pitch

• Rotation: Right-Hand

• Blade Count: 4 Blades

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

• Finish: Glossy Phantom Black Enamel that protects against corrosion

• Hub System: Rubber bushing design absorbs vibration and shields drivetrain components

• Design Details: Balanced for tight handling, smooth trolling, and precise control at low speeds

Engine & Boat Compatibility

• Fits Mercury and Mariner 8–9.9hp FourStroke outboards (2005 and newer)

• Ideal for kicker motors, small fishing boats, dinghies, and inflatables

• Perfect for precise maneuvering, steady trolling, and smooth low-speed operation

Performance Benefits

You will notice right away how responsive this prop feels. Each blade is tuned for control, gripping the water cleanly so you can guide your boat with subtle, confident movements. When you’re trolling or easing along a shoreline, it holds a steady pace without chatter or slip. That smooth, predictable motion makes long days on the water easier and far more enjoyable.

The 4-blade design gives you a stronger bite and better control at slower speeds compared to standard 3-blade props. It’s ideal for fine-tuning your direction while fishing, docking, or working through tight spots. You won’t have to fight your boat to stay on course — it simply goes where you want it to.

Mercury’s Mercalloy aluminum gives this prop real-world toughness. It is strong enough to handle occasional bumps or debris but flexible enough to absorb minor impact without breaking. The built-in rubber bushing adds another layer of protection, softening vibration and shielding the drivetrain from sudden jolts.

Maintenance couldn’t be simpler. A quick rinse after a run keeps it ready for the next trip, and the Phantom Black enamel finish not only looks sharp but resists corrosion in both saltwater and freshwater. It’s a small, reliable piece of engineering that makes a big difference in how your boat feels and performs.

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

• Mercury OEM Quality: It is Designed by Mercury for a precise fit, proven reliability, and lasting performance.

• Reliable and Easy to Maintain: Built tough and made for seasons of simple, low-stress use.

• Strong Value: Delivers trusted performance and control at an affordable price.

• Purpose-Built for Kickers: Offers superior low-speed control, making it ideal for trolling and maneuvering.

• Proven Dependability: Favored by boaters for its balance, quiet operation, and durable design.

FAQ

Q1: Which Mercury engines does the Black Max 4-Blade Aluminum Propeller fit?

It fits Mercury and Mariner 8–9.9hp FourStroke outboards (2005 and newer), making it perfect for kicker and auxiliary motor applications.

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

This model’s 4-blade design gives it better control and smoother low-speed operation, ideal for trolling and precision handling. It also includes a vibration-dampening rubber hub for added protection.

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

If you’re using an 8–9.9hp Mercury or Mariner kicker motor and want better steering response and slower trolling speeds, the 8" x 5" pitch setup is a perfect fit.

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

Yes. The Phantom Black enamel coating provides long-lasting protection from corrosion in both environments.

Q5: What hub system does it use?

It features a rubber bushing hub that cushions vibration and protects the drivetrain from small impact damage.