Mercury – Black Max Propeller | 12.5" Diameter x 8" Pitch | Right-Hand Rotation | 3 Blades | Aluminum | Glossy Phantom Black Finish | 42738A45

Overview

There’s something about a propeller you can rely on that gives you peace of mind every time you hit the water. The Mercury Black Max 3-Blade Aluminum Propeller isn’t fancy—it’s dependable, smooth, and built to handle the realities of boating. It grips the water with confidence, accelerates cleanly, and stays steady when the wind and waves try to throw you off course. Whether you’re cruising calm coves or heading out for a long day of fishing, this prop gives you that solid, sure-footed feel every boater appreciates.

Key Features

• Diameter and Pitch: 12.5" Diameter x 8" Pitch

• Rotation: Right-Hand

• Blade Count: 3 Blades

• Material: Patented Mercalloy Aluminum Alloy for strength and flexibility

• Finish: Glossy Phantom Black Enamel for corrosion resistance

• Hub System: Includes Flo-Torq Reflex Hub Kit 835257K12 to protect drivetrain components

• Design Details: Designed for smooth takeoff, efficient cruising, and forgiving performance under varying loads

Engine & Boat Compatibility

• Fits Mercury and Mariner 25–30hp FourStroke BigFoot/Command Thrust outboards

• Compatible with 30hp TwoStroke and 30hp FourStroke (2005 and earlier) engines

• Works with 40–60hp FourStroke models

• Ideal for pontoon boats, small fishing boats, light runabouts, and utility boats that need dependable thrust and steady control

Performance Benefits

This prop delivers that comfortable blend of thrust and stability that boaters love. When you open the throttle, it hooks up quickly and lifts your boat with a confident, smooth push. At mid-range cruising speeds, it keeps your ride balanced and composed—no chatter, no slipping, just a steady grip that makes long runs feel easy.

The Mercalloy aluminum construction gives it real-world toughness without making it brittle. It’s forgiving enough to handle the occasional bump or debris strike without turning your weekend into a repair bill. The included Flo-Torq Reflex Hub Kit cushions your drivetrain from impacts and vibration, protecting your motor while keeping your ride quieter and smoother.

Maintenance couldn’t be simpler—just a quick rinse after use and it’s ready for next time. The Phantom Black enamel finish doesn’t just look sharp; it keeps corrosion at bay in both salt and freshwater, so the prop stays looking clean and performing strong season after season.

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

• Mercury OEM Quality: Built by Mercury to fit perfectly and perform flawlessly.

• Reliable and Easy to Maintain: Simple upkeep with long-lasting endurance

• Cost-Effective Alternative: Delivers strong, reliable performance without the big price tag of stainless steel.

• Versatile Fit: It fits a wide range of small to mid-size outboards, making it a smart, go-anywhere choice for different types of boats.

• Trusted by Boaters: Known for its smooth handling, strong lift, and consistent reliability on the water.

FAQ

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

It fits Mercury and Mariner 25–30hp FourStroke BigFoot/Command Thrust models, 30hp TwoStroke, 30hp FourStroke (2005 and earlier), and 40–60hp FourStroke outboards.

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

This model pairs Mercury’s Mercalloy aluminum with the Flo-Torq Reflex Hub system, giving you both strength and flexibility. It’s a forgiving, durable setup that provides smooth performance and impact protection.

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

If you’re running a 25–60 horsepower Mercury outboard and need strong lift with dependable control at lower speeds, the 12.5" x 8" pitch propeller is a great fit. Always confirm with your owner’s manual or local dealer to match your specific setup.

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

Yes, it performs well in both. The Phantom Black enamel finish protects against corrosion, keeping it looking great and performing smoothly in any water type.

Q5: What hub system does it use?

It comes equipped with Mercury’s Flo-Torq Reflex Hub Kit 835257K12, which helps absorb shock and vibration while protecting the drivetrain from minor impact damage.