Mercury – Black Max 3-Blade Aluminum Propeller | 14" Diameter x 10" Pitch | Right-Hand Rotation | 3-Blade | Aluminum | Phantom Black Finish | 854342A45

Overview

There’s a certain comfort in knowing your boat will perform exactly how you expect. That’s what you get with the Mercury Black Max 3-Blade Aluminum Propeller (Part Number 854342A45)—a prop that’s as dependable as it is smooth. From early morning runs to lazy afternoon cruises, this prop delivers steady acceleration, easy handling, and that unmistakable Mercury feel.

It’s the kind of prop that doesn’t try to show off—it just works. Reliable, forgiving, and built to last, the Black Max is trusted by boaters everywhere because it never forgets what matters most: smooth performance and worry-free reliability on the water.

Key Features

• Diameter & Pitch: 14" diameter x 10" pitch for strong lift and balanced acceleration.
• Rotation: Right-Hand rotation for standard outboard configurations.
• Blade Count: 3-Blade design for smooth, even thrust and consistent performance.
• Material: Mercury’s patented Mercalloy aluminum alloy—lightweight, durable, and flexible enough to handle minor impacts.
• Finish: High-gloss Phantom Black enamel finish resists corrosion and maintains a clean, polished look.
• Hub System: Includes Flo-Torq II Hub Kit (Part Number 835257K1) to reduce drivetrain shock and vibration.
• Design Details: Precision-balanced blades minimize vibration and improve water flow for better grip and handling.

Engine & Boat Compatibility

This Mercury propeller fits a variety of popular Mercury and Mariner engines and performs reliably across different boat types.

• Fits Mercury and Mariner 40–60 HP BigFoot and Command Thrust outboards (all years)
• Compatible with Mercury and Mariner 75–125 HP outboards (1978 and newer)
• Perfect for runabouts, fishing boats, and pontoons that need dependable acceleration and control
• Works well for boaters who prefer an all-around performer over specialized, high-cost alternatives

Performance Benefits

The Mercury Black Max 854342A45 propeller offers that perfect blend of power and poise. Its 10-pitch setup is tuned for dependable lift and quick acceleration—ideal for heavier boats or those that need a little extra push when planing. You’ll feel the difference as the prop grips the water firmly, delivering a confident rise and smooth, steady cruising speed.

Mercury’s Mercalloy aluminum is purpose-built for real boating conditions. It’s strong enough to stand up to long seasons of use, yet flexible enough to absorb small impacts that would crack other materials. When paired with the Flo-Torq II Hub System, it cushions the drivetrain from shock, protecting your engine and ensuring quieter, smoother rides every time you head out.

The glossy Phantom Black enamel finish isn’t just about looks—it’s engineered to fend off corrosion from saltwater, freshwater, and everything in between. The result is a propeller that performs beautifully and keeps its shine, season after season.

Why This Product Is a Strong Choice vs. Alternatives

• Mercury OEM quality: Designed and tested by Mercury engineers for perfect fit, balance, and factory-level performance.
• Reliable and easy to maintain: Simple installation and low maintenance make it a favorite for both seasoned boaters and newcomers.
• Cost-effective vs. stainless: Offers impressive durability and smooth performance at a fraction of the price, while staying forgiving under light impacts.
• Versatile fit: Works across multiple Mercury and Mariner setups, making it a smart, all-around choice for boaters with varied needs.

FAQ Section

Q1: Which Mercury engines does the Black Max 854342A45 fit?

It fits Mercury and Mariner 40–60 HP BigFoot/Command Thrust outboards (all years) and 75–125 HP outboards from 1978 and newer.

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

It’s built from Mercury’s exclusive Mercalloy aluminum—light yet resilient—and features the Flo-Torq II Hub System, which absorbs vibration and protects the drivetrain from impact.

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

The 10-pitch prop offers great lift and acceleration for boats that carry heavier loads or need strong low-end torque. Compare it with your current prop’s specs or consult your owner’s manual to confirm.

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

Yes. The Phantom Black enamel finish provides reliable corrosion resistance in all environments, keeping your prop protected year-round.

Q5: What hub system does it use?

This prop includes the Flo-Torq II Hub Kit (835257K1), designed to absorb shock, reduce vibration, and protect engine components from sudden impact.