Mercury – Enertia 3-Blade Stainless Steel Propeller | 13.6" Diameter x 21" Pitch | Right-Hand Rotation | 3-Blade | X7 Stainless Steel | Polished Finish | 8M0151243

Overview

You know that moment when your boat lifts onto plane the surge, the balance, the smooth acceleration that feels effortless? That’s the kind of performance you get from the Mercury Enertia 3-Blade Stainless Steel Propeller (8M0151243). It’s more than just speed it’s about the connection between you, your boat, and the water. This prop gives you confidence in every throttle push, from glassy morning runs to heavy loads on summer afternoons. It feels tight, responsive, and solid like the boat was built around it.

Key Features

• Diameter and Pitch: 13.6" Diameter x 21" Pitch
• Rotation: Right-Hand
• Blade Count: Three-Blade design for acceleration, lift, and consistent top-end performance
• 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: Features Mercury’s Performance Vent System (PVS) for adjustable hole shot and acceleration tuning

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 recreational boats that need strong acceleration, lift, and handling control

Performance Benefits

The Mercury Enertia 3-Blade Propeller transforms every bit of horsepower into something you can feel — power that launches your boat forward with precision and smooth control. The acceleration is sharp and immediate, but it never feels harsh or unpredictable. It grips the water firmly, giving you that confident push onto plane while keeping your ride smooth and steady.

Once you’re cruising, you will notice how naturally it handles. The Enertia tracks straight, holds its speed through turns, and stays composed even when water conditions get rough. It feels balanced and predictable — exactly what you want when you’re towing riders or cutting across a busy lake.

The secret behind that performance is Mercury’s proprietary X7 stainless steel alloy, a material 30% stronger than conventional stainless steel. This extra stiffness prevents flexing under load, ensuring the blades maintain their precise pitch and shape run after run. The result? Consistent performance and long-term reliability season after season.

Adding to that, Mercury’s Performance Vent System (PVS) gives you control over how your prop accelerates. By swapping vent plugs, you can tune your hole shot to match your boat’s weight, water conditions, and desired throttle response. It is a small detail that makes a big difference for serious boaters who like their setup just right.

In short, the Enertia feels refined, responsive, and built for those who value performance they can trust.

Why is this prop a strong choice vs. alternatives?

• Mercury OEM Precision: Designed, engineered, and tested by Mercury’s own experts for a perfect fit and performance.
• Superior Strength: The X7 stainless steel alloy resists flex and fatigue for long-lasting consistency and reliability.
• Tunable Performance: The PVS system lets you customize your acceleration and hole shot for your specific setup.
• Versatile Fit: Works beautifully across multiple boat types, from sporty runabouts to family pontoons.
• Durable Finish: Polished stainless steel resists corrosion and maintains its clean look season after season.

If you’re looking for a propeller that feels as solid as it performs — one that launches with confidence, holds steady through turns, and runs smooth at any speed — the Mercury Enertia 3-Blade is the one to trust. It’s a prop that doesn’t just move your boat — it enhances your connection with the water.

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 is made from Mercury’s exclusive X7 stainless steel alloy, which is stronger and stiffer than standard stainless. It also features the PVS system for adjustable acceleration.

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

A 21" pitch prop is ideal for midsize to larger boats that need quick acceleration and reliable top-end performance. Always check your engine’s recommended RPM range for best results.

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

Yes. Its polished stainless steel finish protects against corrosion and ensures durability 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, secure shifting and acceleration.