Mercury – Black Max 3-Blade Aluminum Propeller | 12" Diameter x 10.5" Pitch | Right-Hand Rotation | 3 Blades | Aluminum | Glossy Phantom Black Finish | 42740A45

Overview

There’s a certain peace of mind that comes with using gear you can depend on — the kind that never makes a fuss, never surprises you, and just does its job right every single time. That’s exactly what you get with the Mercury Black Max 3-Blade Aluminum Propeller. It is smooth, steady, and built for boaters who’d rather spend their day on the water than thinking about their prop. From lazy morning drifts to afternoons chasing wind and chop, this prop stays planted, keeping your boat responsive, balanced, and ready for more.

Key Features

• Diameter and Pitch: 12" Diameter x 10.5" Pitch

• Rotation: Right-Hand

• Blade Count: 3 Blades

• Material: Mercury’s patented Mercalloy Aluminum Alloy — tough yet forgiving when it counts

• Finish: Glossy Phantom Black Enamel that resists corrosion and keeps its clean look season after season

• Hub System: Includes Flo-Torq Reflex Hub Kit 835257K12 to reduce vibration and protect your drivetrain

• Design Details: Designe for quick acceleration, quiet cruising, and steady performance even under shifting loads

Engine & Boat Compatibility

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

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

• Compatible with 40–60hp FourStroke models

• Perfect for pontoons, small fishing boats, runabouts, and utility craft that need reliable thrust and smooth control on the water

Performance Benefits

You’ll notice the difference the moment you push the throttle. The blades grab hold fast, giving you a confident, clean lift onto plane without hesitation. There’s no slipping, no chatter — just smooth, predictable power you can feel through the wheel. Once you’re up and running, it stays composed, quiet, and steady even when the water turns rough.

The Mercalloy aluminum body has that perfect blend of strength and give — it can handle the occasional bump or debris without ruining your day. The Flo-Torq Reflex Hub Kit adds another layer of comfort by softening vibration and absorbing minor shocks, protecting your motor while keeping the ride easy and controlled.

Upkeep is about as simple as it gets. Give it a rinse, a quick glance, and you’re back out there. The Phantom Black enamel finish doesn’t just look sharp — it holds up beautifully in both saltwater and freshwater, keeping your prop sleek and corrosion-free long after other finishes fade.

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

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

• Reliable and Easy to Maintain: Simple upkeep and a proven design that lasts through countless runs.

• Cost-Effective Choice: Delivers strong performance without the higher price tag of stainless steel.

• Versatile Fit: It works with a variety of small to mid-size outboards — a go-to for many boat types.

• Trusted by Boaters: Known for its dependable grip, smooth lift, and steady handling across changing waters.

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, 30hp TwoStroke, 30hp FourStroke (2005 and earlier), and 40–60hp FourStroke outboards.

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

The Black Max is Mercury’s trusted all-around aluminum propeller. Its Mercalloy build keeps it strong yet flexible, while the Flo-Torq Reflex Hub cuts vibration and protects your engine’s drivetrain.

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 want fast lift, balanced cruising, and steady handling, the 12" x 10.5" pitch setup is a great match. Check your manual or dealer to confirm fit.

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

Absolutely. The Phantom Black enamel finish holds strong against corrosion in both environments, keeping your prop clean and smooth.

Q5: What hub system does it use?

It includes Mercury’s Flo-Torq Reflex Hub Kit 835257K12, designed to absorb vibration and protect the drivetrain from minor impact damage.

The Mercury propeller (part number 42740A45) is built for real boaters — the kind who want gear that’s reliable, steady, and easy to live with. It’s not about flash; it’s about trust, smooth power, and that feeling when your boat moves exactly how you want it to. Season after season, this prop delivers.