Mercury Enertia 3-Blade Propeller 13.8x20 RH X7 Stainless

Overview

There’s nothing quite like that instant surge when you hit the throttle and feel your boat lift cleanly onto plane — steady, confident, and full of life. That’s exactly what you’ll get with the Mercury Enertia 3-Blade Stainless Steel Propeller (8M0151241). Built for boaters who love a crisp, responsive ride, this prop brings together smooth acceleration, powerful grip, and balanced control. Whether you’re cruising across calm water or towing on a busy summer afternoon, the Enertia gives you a sense of connection to your boat that’s hard to beat — it just feels right.

Key Features

Diameter and Pitch: 13.8" Diameter x 20" Pitch
Rotation: Right-Hand
Blade Count: Three-Blade design for lift, acceleration, and stability
Material: Mercury X7 stainless steel alloy — 30% stronger and four times more durable than standard stainless steel
Finish: Polished for corrosion resistance and smooth water flow
Hub System: Requires Mercury Flo-Torq hub kit (sold separately)
Design Details: Equipped with Mercury’s Performance Vent System (PVS) for fine-tuned acceleration and hole shot control

Engine & Boat Compatibility

Fits Mercury and Mariner 90–115 HP Command Thrust outboards
Compatible with Mercury 135–350 HP TwoStroke and FourStroke outboards (excluding V10 Verado models)
Works with MerCruiser Alpha One and Bravo One sterndrives
Ideal for runabouts, pontoons, fishing boats, and midsize to large recreational boats that demand both power and precision

Performance Benefits

The Mercury Enertia 3-Blade Propeller turns engine power into something you can feel — clean, confident motion. From the first press of the throttle, the blades grab the water with authority, lifting your boat smoothly and predictably. The acceleration is sharp but controlled, giving you that sweet blend of power and refinement that keeps your ride comfortable even when you’re pushing it.

At cruising speed, the Enertia’s balance really shines. It holds steady through turns, tracks straight in rougher water, and keeps the helm light and responsive. The handling feels precise and intuitive — no drag, no chatter, just smooth, consistent control.

That performance comes from Mercury’s exclusive X7 stainless steel, a proprietary alloy designed to handle more stress without flexing. This stiffness helps maintain exact pitch and shape, ensuring the prop performs as consistently in its third season as it did in its first. Pair that with the Performance Vent System (PVS), and you can fine-tune your hole shot by swapping vent plugs — dialing in the acceleration to fit your specific boat setup, load, and conditions.

It’s a prop built not just for power, but for feel — smooth, confident, and efficient no matter how you run.

Why is this prop a strong choice vs. alternatives?

Mercury OEM Precision: Designed and tested by Mercury engineers for perfect integration and long-term reliability.
Exceptional Durability: X7 stainless steel alloy provides 30% greater strength than standard stainless, reducing flex and fatigue.
Tunable Acceleration: PVS system lets you adjust how your prop responds off the line.
Versatile Fit: Performs beautifully across a range of boats and engines, from sporty runabouts to powerful pontoons.
Season-After-Season Reliability: Polished finish resists corrosion, ensuring years of smooth, confident performance.

If you want a propeller that combines strength, balance, and adaptability, the Enertia 3-Blade is a trusted partner on the water. It’s not just about going fast — it’s about feeling every moment of control, precision, and freedom that comes with it.

FAQ

Q1: Which Mercury engines does the Enertia 3-Blade Propeller fit?

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

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

The Enertia uses Mercury’s exclusive X7 stainless steel alloy, making it 30% stronger and more durable than traditional stainless. It also features the PVS system for customizable performance.

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

A 20" pitch prop is ideal for midsize and larger boats that need strong acceleration and efficient top-end speed. Checking your engine’s recommended RPM range helps ensure the best fit.

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

Yes. The polished X7 stainless steel finish protects against corrosion and maintains lasting shine in both environments.

Q5: What hub system does it use?

It requires a Mercury Flo-Torq hub kit (sold separately), which cushions drivetrain shock and provides smooth, reliable shifting and acceleration.