Mercury – Black Max 3-Blade Aluminum Propeller | 10.375" Diameter x 11" Pitch | Right-Hand Rotation | 3 Blades | Aluminum | Glossy Phantom Black Finish | 19638A40

Overview

There is a certain confidence that comes from using gear you trust — the kind that responds exactly how you expect, no matter the conditions. That is what the Mercury Black Max 3-Blade Aluminum Propeller delivers every time you drop it into gear. It’s steady, responsive, and built for boaters who want a smooth ride without the fuss. Whether you’re working your way through a quiet morning channel or opening it up across the lake, this prop gives you that solid connection to the water that makes every trip feel effortless.

Key Features

• Diameter and Pitch: 10.375" Diameter x 11" Pitch

• Rotation: Right-Hand

• Blade Count: 3 Blades

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

• Finish: Glossy Phantom Black Enamel for corrosion resistance and lasting shine

• Hub System: Rubber bushing absorbs vibration and protects drivetrain components

• Design Details: Built for reliable lift, quick planing, and smooth handling across various speeds

Engine & Boat Compatibility

• Fits Mercury and Mariner 9.9hp and 15hp FourStroke BigFoot (1999–2004)

• Works with 20–25hp TwoStroke Classic (1980–2006) outboards

• Compatible with 25hp SeaPro and Marathon outboards

• Ideal for small fishing boats, runabouts, pontoons, and utility boats that need steady, quiet thrust and dependable performance

Performance Benefits

You will feel this prop’s confidence the moment you ease forward on the throttle. It grips the water with a clean, solid bite, lifting your boat onto plane with smooth, even pressure. Once you’re underway, everything settles into a rhythm — steady pull, quiet spin, and predictable handling through turns or choppy conditions. It’s not flashy; it just performs exactly the way you want it to.

The Mercalloy aluminum construction gives it the best mix of strength and flexibility. It can take a few knocks from floating debris or shallow scrapes and keep on going, thanks to its ability to flex slightly under pressure without cracking. The built-in rubber bushing hub system helps absorb vibration, keeping the ride smoother for both you and your motor. It is a small detail that makes long hours on the water noticeably more comfortable.

Maintenance is refreshingly simple — rinse it off, check for wear, and it’s ready for the next run. The Phantom Black enamel finish not only gives it a sharp look but also shields it from corrosion in both saltwater and freshwater environments. It’s a prop that keeps working season after season, no matter where you take it.

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

• Mercury OEM Quality: Engineered by Mercury for a perfect fit and consistent, proven reliability.

• Reliable and Easy to Maintain: Straightforward care and rugged construction for years of dependable use.

• Cost-Effective Choice: Offers smooth performance without the high cost of stainless steel props.

• Versatile Fit: Works across multiple small to mid-sized Mercury outboards and boat styles.

• Trusted by Boaters: Known for its quiet balance, strong grip, and long-lasting dependability on the water.

FAQ

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

It fits Mercury and Mariner 9.9hp and 15hp FourStroke BigFoot (1999–2004), 20–25hp TwoStroke Classic (1980–2006), and 25hp SeaPro/Marathon outboards.

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

This prop offers Mercury’s signature balance of strength and smooth performance. Its Mercalloy construction and rubber bushing hub combine for quiet, forgiving operation and long-term durability.

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

If your setup runs a 9.9–25 horsepower Mercury outboard and you’re looking for strong acceleration, clean lift, and steady cruising power, the 10.375" x 11" pitch is an excellent fit. Check your manual or local Mercury dealer to confirm compatibility.

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

Yes. The Phantom Black enamel coating resists corrosion and maintains its sleek look in both environments.

Q5: What hub system does it use?

It features a rubber bushing hub that helps cushion vibration, protect the drivetrain, and absorb minor impact damage for smoother performance.