Mercury – Black Max 4-Blade Aluminum Propeller (Silver) | 10" Diameter x 7" Pitch | Right-Hand Rotation | 4 Blades | Aluminum | Silver Finish | 812948A10

Overview

There is a certain satisfaction in feeling your boat respond exactly how you expect steady, quiet, and sure-footed through every turn. That’s what the Mercury Black Max 4-Blade Aluminum Propeller (Silver) delivers. It is built for smaller outboards and kicker motors that demand precision, giving you smooth, predictable handling whether you’re trolling for hours or easing up to the dock. With its durable Mercalloy construction and 4-blade balance, this prop gives you effortless control and peace of mind every time you hit the water.

Key Features

• Diameter and Pitch: 10" Diameter x 7" Pitch

• Rotation: Right-Hand

• Blade Count: 4 Blades

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

• Finish: Silver Aluminum finish for a clean, corrosion-resistant look

• Hub System: Flo-Torq I Rubber Hub System absorbs vibration and shields drivetrain components

• Design Details: Crafted for precise speed control, smooth trolling, and steady steering response

Engine & Boat Compatibility

• Fits Mercury and Mariner 9.9hp BigFoot/Command Thrust (2005 and newer)

• Compatible with 9.9hp ProKicker and 15–20hp FourStroke (2008 and newer) outboards

• Ideal for kicker motors, small fishing boats, inflatables, and light utility craft

• Perfect for tight maneuvering, trolling, and quiet, stable low-speed cruising

Performance Benefits

You will feel the balance right from the start. This 4-blade Mercury prop grips the water cleanly, giving your boat confident lift and responsive steering, even at low speeds. It is the kind of prop that makes slow trolling and precision docking feel natural and effortless. You won’t be fighting your motor or second-guessing your turns — just smooth, controlled movement that feels steady and predictable.

The extra blade adds grip and stability, especially when working through current or wind. It holds a consistent pace without slipping or chattering, keeping your boat where you want it. And when it’s time to throttle up, the prop transitions cleanly into motion, providing firm, balanced power without hesitation.

Mercury’s Mercalloy aluminum gives this prop real-world strength — tough enough to handle small impacts or debris, yet flexible enough to take a knock without cracking. The Flo-Torq I rubber hub system adds another layer of protection, reducing vibration and cushioning the drivetrain from sudden jolts. Together, they make for a prop that’s durable, forgiving, and built for long-term dependability.

Maintenance couldn’t be easier. Rinse it after a run, give it a quick check, and you are set. The silver aluminum finish resists corrosion in both saltwater and freshwater, keeping your prop looking sharp and performing like new, season after season.

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

• Mercury OEM Quality: Designed by Mercury for a perfect fit and consistent, proven performance.

• Reliable and Easy to Maintain: Built tough with materials that stand up to real-world use.

• Cost-Effective Choice: It Delivers excellent performance and protection without the stainless-steel price tag.

• Precision Control: The 4-blade design provides smoother, quieter operation and better grip at lower speeds.

• Trusted by Boaters: Known for its balance, quiet handling, and long-lasting dependability.

FAQ

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

It fits Mercury and Mariner 9.9hp BigFoot/Command Thrust (2005 and newer), 9.9hp ProKicker, and 15–20hp FourStroke (2008 and newer) outboards.

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

This model’s 4-blade design delivers tighter handling and smoother low-speed control, perfect for trolling and precision work. Its Flo-Torq I hub system also provides vibration damping and drivetrain protection.

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

If you’re running a 9.9–20 horsepower Mercury outboard and want better steering control and smooth low-speed operation, the 10" x 7" pitch prop is an excellent fit.

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

Yes, its corrosion-resistant silver aluminum finish ensures durability and protection in both environments.

Q5: What hub system does it use?

It features Mercury’s Flo-Torq I rubber hub system, which cushions vibration and helps protect the drivetrain from minor impacts.

This Mercury Black Max aluminum propeller fits the following Mercury outboard models:

• 9.9 HP Bigfoot / Command Thrust FourStroke (2005 and newer)
• 9.9 HP Pro Kicker (all years)
• 15 - 20 HP FourStroke (2008 and newer)