Mercury – Black Max 3-Blade Aluminum Propeller | 10.375" Diameter x 12" Pitch | Right-Hand Rotation | 3 Blades | Aluminum | Glossy Phantom Black Finish |19639A40

Overview

There’s a special kind of confidence that comes from using a propeller that simply works. You feel it the moment you open up the throttle and the boat responds exactly how you hoped—steady, balanced, and smooth. That’s what the Mercury Black Max 3-Blade Aluminum Propeller is known for. It’s earned a place on countless boats because it never tries to be flashy—it’s just dependable, forgiving, and honest. When the water gets rough or you brush against the unexpected, this prop doesn’t complain. It keeps doing what it does best—delivering reliable, effortless performance every single time you launch.

Key Features

• Diameter and Pitch: 10.375" Diameter x 12" Pitch

• Rotation: Right-Hand

• Blade Count: 3 Blades

• Material: Mercury’s Patented Mercalloy Aluminum Alloy

• Finish: Glossy Phantom Black Enamel for long-lasting protection

• Hub System: Rubber-cushioned hub absorbs vibration and guards your drivetrain

• Design Details: Crafted for crisp acceleration, steady cruising, and smooth, predictable handling in every condition

Engine & Boat Compatibility

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

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

• Works perfectly with 25hp SeaPro and Marathon models

• Ideal for small fishing boats, inflatables, light runabouts, and utility skiffs—any setup where you want effortless dependability on the water

Performance Benefits

The Black Max 12-pitch model offers the kind of balanced performance most props chase but few deliver. It digs in firmly when you accelerate, giving you that strong, steady push without hesitation or cavitation. Once you’re cruising, it’s quiet and composed, even when the water isn’t.

Mercury’s Mercalloy aluminum gives this prop real-world strength with a bit of forgiveness. If you happen to clip a branch or graze the bottom, it’s built to absorb the impact instead of shattering. The rubber-cushioned hub adds another layer of protection, softening vibration so the ride feels smooth from idle to full throttle.

Why This Prop Is a Strong Choice

• Mercury OEM Quality: Built by Mercury, designed to fit right, and engineered to last.

• Reliable and Easy to Maintain: Simple care with long-term dependability you can count on.

• Cost-Effective Alternative: Nearly stainless-level performance at a fraction of the cost.

• Versatile Fit: Works beautifully across several small-engine setups, ideal as a primary or backup prop.

• Proven Dependability: Trusted by boaters worldwide for its consistency, balance, and smooth pull through 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 and Marathon outboards.

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

It’s that rare mix of toughness, smoothness, and value. The Black Max uses Mercury’s Mercalloy aluminum, which combines flexibility and strength, along with a cushioned hub that minimizes vibration for a quieter, steadier ride.

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

If you’re running a 9.9–25 horsepower outboard and want strong cruising speed without losing acceleration, the 10.375" x 12" pitch setup is a solid choice. Still, it’s always smart to confirm with your owner’s manual or local dealer to make sure it matches your boat’s load and design.

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

Yes, absolutely. The Phantom Black enamel finish offers lasting corrosion protection in both environments, keeping your prop clean, shiny, and ready for anything.

Q5: What hub system does it use?

It’s built with a durable rubber-cushioned hub that softens vibration and protects the drivetrain from minor impacts and shock.