Mercury – Enertia ECO 3-Blade Stainless Steel Propeller | 16" Diameter x 21" Pitch | Left-Hand Rotation | 3 Blades | X7 Stainless Steel | Polished Finish | 8M0151258

Overview

Some props save fuel. Others deliver speed. The Mercury Enertia ECO 3-Blade Stainless Steel Propeller (Part Number 8M0151258) does both — and it does it beautifully. This prop has a way of making your boat feel balanced and responsive, as if it’s anticipating every move you make. It is the kind of prop you trust on long runs when efficiency and smooth control matter most. You’ll feel it the moment your boat lifts onto plane — confident, steady, and ready for the water ahead.

Key Features

• Diameter and Pitch: 16" Diameter x 21" Pitch

• Rotation: Left-Hand

• Blade Count: 3-Blade Design

• Material: Mercury X7 Stainless Steel Alloy (30% stronger and four times more durable than conventional stainless steel)

• Finish: Polished Stainless Steel

• Hub System: Requires Mercury Hub Kit (sold separately)

• Design Details: Engineered for maximum fuel efficiency at cruising speeds without losing top-end power or acceleration

Engine & Boat Compatibility

• Designed for Mercury and Mariner 90–115 HP Command Thrust outboards

• Fits Mercury 135–350 HP TwoStroke and FourStroke outboards (excluding V10 Verado)

• Compatible with MerCruiser Alpha One and Bravo One sterndrives

• Ideal for runabouts, pontoons, offshore boats, and fishing vessels that cruise at mid-range RPMs

Performance Benefits

The Enertia ECO delivers what every boater wants — more time on the water with less fuel burned. Its design provides a clean, smooth lift onto plane, with an effortless push that feels solid yet refined. At cruising speed, you’ll immediately notice how stable and composed your ride becomes. The boat tracks straight, throttle response feels precise, and your engine hums comfortably without working harder than it has to.

Built from Mercury’s exclusive X7 stainless steel, this prop resists flex under load and maintains its bite in rough conditions. The result is consistent performance, steady handling, and dependable grip on the water, even during tight turns or when carrying heavier loads. It’s forgiving when you need it to be, yet strong enough to deliver crisp acceleration when the open water calls. And when you look down at your fuel gauge, you’ll realize it’s more than just a prop — it’s a range extender.

Why is this prop a strong choice vs. alternatives?

• Mercury OEM quality backed by decades of marine innovation and testing

• Enhanced fuel economy without sacrificing acceleration or speed

• Versatile fit across a wide range of engines and boat types

• Exceptional durability with the high-strength X7 alloy

• Smooth, quiet cruising ideal for long-range boating adventures

• Reliable and cost-effective, providing lasting value and trusted performance

If you’re the kind of boater who appreciates smooth power and long-distance cruising, the Enertia ECO 8M0151258 is your prop. It blends the precision of Mercury’s engineering with the practicality every captain values — efficiency, endurance, and effortless control.

FAQ

Q1: Which Mercury engines does the Enertia ECO fit?

It’s compatible with Mercury and Mariner 90–115 HP Command Thrust outboards, 135–350 HP TwoStroke and FourStroke outboards (excluding V10 Verado models), and MerCruiser Alpha One and Bravo One sterndrives.

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

The Enertia ECO is engineered to deliver maximum range and fuel efficiency while keeping strong acceleration and high-speed performance. It’s optimized for the RPM range most boaters use daily.

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

A 21-pitch prop is ideal for boats that cruise frequently and want to improve fuel economy without losing responsiveness. It’s a great middle ground between power and efficiency.

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

Yes. The X7 stainless steel alloy is designed for long-term resistance to corrosion, making it reliable in any environment.

Q5: What hub system does it use?

It requires a Mercury hub kit (sold separately) to ensure a perfect fit and smooth engagement with compatible engines.