Mercury – Black Max 3-Blade Aluminum Propeller | 14" Diameter x 9" Pitch | Right-Hand Rotation | 3-Blade | Aluminum | Phantom Black Finish | 854340A45

Overview

Ask any boater what they want from a propeller, and they’ll tell you the same thing—smooth acceleration, steady control, and confidence every time they hit the throttle. That’s exactly what the Mercury Black Max 3-Blade Aluminum Propeller (Part Number 854340A45) delivers. It’s built for boaters who care about performance but also appreciate reliability that doesn’t demand attention.

From the moment your boat lifts onto plane to the easy glide back toward shore, the Black Max delivers a feeling that’s hard to describe but easy to love. It’s the dependable workhorse of the water—tough, forgiving, and ready for whatever the weekend throws your way.

Key Features

• Diameter & Pitch: 14" diameter x 9" pitch for confident lift and responsive acceleration.
• Rotation: Right-Hand rotation for standard outboard setups.
• Blade Count: 3-Blade design provides smooth thrust, balanced handling, and consistent performance.
• Material: Patented Mercury Mercalloy aluminum alloy—strong, lightweight, and flexible enough to handle minor impacts.
• Finish: Mercury Phantom Black enamel helps prevent corrosion and adds a professional, long-lasting look.
• Hub System: Includes Flo-Torq II Hub Kit (Part Number 835257K1) to cushion shock and protect drivetrain components.
• Design Details: Precision-balanced blades reduce vibration and improve water flow for smoother rides and longer prop life.

Engine & Boat Compatibility

This Mercury propeller fits a wide range of engines and boats, giving you flexibility across multiple setups.

• Designed for Mercury and Mariner 40–60 HP BigFoot / Command Thrust outboards (all years)
• Fits Mercury and Mariner 75–125 HP outboards (1978 and newer)
• Works well with runabouts, pontoons, and fishing boats where reliable performance and easy maintenance matter most

Performance Benefits

The Mercury Black Max 854340A45 propeller transforms every trip into a smooth, confident ride. Its 14" diameter and 9" pitch combination is designed for quick lift and reliable power delivery—ideal for mid-range outboards that need strong low-end torque without sacrificing top-end performance.

When you push the throttle, the prop grips the water firmly, getting your boat on plane quickly and keeping it steady through turns or choppy conditions. The 3-blade configuration provides an effortless balance of thrust and control, allowing for responsive maneuvering whether you’re trolling along a shoreline or running full throttle down a channel.

Mercury’s Mercalloy aluminum alloy is engineered for real-world boating. It’s strong enough to handle long seasons of use but flexible enough to absorb small impacts that would crack other props. Combined with the Flo-Torq II Hub System, it helps protect your drivetrain from sudden shocks and reduces vibration for a smoother, quieter ride.

And with its Phantom Black enamel finish, corrosion is one less thing to worry about. Saltwater or freshwater, this prop stands up to the elements while looking sharp season after season.

Why This Product Is a Strong Choice vs. Alternatives

• Mercury OEM quality: Designed, tested, and built by Mercury engineers to meet strict factory standards for performance and reliability.
• Reliable and easy to maintain: Straightforward installation and minimal upkeep make it a perfect fit for everyday boaters.
• Cost-effective vs. stainless: Offers excellent performance at a fraction of the cost, with more forgiveness under light impact.
• Versatile fit: Works across multiple Mercury and Mariner engine configurations, giving you flexibility and dependable power for different boating styles.

FAQ Section

Q1: Which Mercury engines does the Black Max 854340A45 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 made from Mercury’s exclusive Mercalloy aluminum, which blends strength and flexibility. The included Flo-Torq II Hub System absorbs vibration and protects your drivetrain from impact.

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

The 9" pitch provides excellent lift and acceleration for heavier loads or slower planing hulls. Check your existing prop’s dimensions or consult your engine manual for confirmation.

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

Yes. The durable Phantom Black enamel finish provides strong resistance against corrosion in both saltwater and freshwater environments.

Q5: What hub system does it use?

It includes the Flo-Torq II Hub Kit (835257K1), which cushions drivetrain components and minimizes shock from sudden impact or debris.