Mercury – SpitFire X7 4-Blade Stainless Steel Propeller | 13" Diameter x 17" Pitch | Right-Hand Rotation | 4-Blade | Stainless Steel | Polished Finish | 8M0151362

Overview

There’s a certain satisfaction in feeling your boat respond instantly when you push the throttle forward. The Mercury SpitFire X7 13x17 Right-Hand 4-Blade Stainless Steel Propeller (8M0151362) gives you that kind of control—quick, confident, and thrilling. It’s light on its feet but solid in its grip, turning every burst of acceleration into a smooth, commanding launch.

You’ll notice it right away. The way your boat climbs onto plane faster, the sharper turns, the crisp responsiveness when trimming out. The SpitFire X7 isn’t just about going fast—it’s about how that speed feels: clean, balanced, and connected. For boaters who love to push limits and still want precision, this prop is the real deal.

Key Features

• Diameter and Pitch: 13" Diameter x 17" Pitch
• Rotation: Right-Hand Rotation
• Blade Count: 4-Blade Design
• Material: Mercury X7 Stainless Steel Alloy (30% stronger and four times more durable than conventional stainless)
• Finish: Polished Stainless Steel
• Hub System: Requires a Mercury hub kit (sold separately)
• Design Details: Small diameter and aggressive blade geometry for excellent speed, acceleration, and tight handling; Performance Vent System (PVS) for custom tuning of hole shot performance

Engine & Boat Compatibility

• Fits Mercury and Mariner 40–60 HP Command Thrust Outboards (4.25-inch gearcase)
• Fits Mercury 75–125 HP TwoStroke and FourStroke Outboards
• Ideal for midsize boats, fishing rigs, and performance runabouts
• Compatible with both freshwater and saltwater applications

Performance Benefits

The SpitFire X7 13x17 is built for speed, but it’s the feel that wins you over. Its smaller diameter and aggressive four-blade design let your boat jump out of the hole and stay glued to the water. You’ll feel a confident “bite” during acceleration, followed by smooth, predictable lift as you trim up and hit cruising speed. This prop doesn’t lose its grip, even in rougher water or when loaded with gear and passengers.

Mercury’s X7 stainless steel alloy adds toughness and resilience that you can depend on. It is more than just durable—it’s engineered to flex less, maintaining consistent shape and balance under heavy torque. That means better performance, longer life, and fewer headaches down the line. And with the Performance Vent System (PVS), you can fine-tune your hole shot to match your exact setup, adjusting how your boat accelerates based on load, water conditions, or your own preference. It’s performance with personality—tailored to you.

Why is this prop a strong choice vs. alternatives?

• Mercury OEM Quality: Designed and tested by Mercury’s engineering team to meet exact performance standards and ensure a precise fit.
• Outstanding Acceleration: The aggressive four-blade geometry gives instant response and tight handling that inspires confidence.
• Built for the Long Haul: X7 stainless steel provides unmatched strength, resisting corrosion and damage even in demanding conditions.
• Customizable Control: The PVS system lets you adjust venting for ideal acceleration and hole shot performance.
• Versatile Performance: Perfect for midsize outboards and boaters who demand a mix of speed, stability, and smoothness.

FAQ Section

Q1: Which Mercury engines does the SpitFire X7 fit?

It fits Mercury and Mariner 40–60 HP Command Thrust outboards with the 4.25-inch gearcase and 75–125 HP TwoStroke and FourStroke outboards.

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

The SpitFire X7 combines a small-diameter, four-blade design with Mercury’s advanced X7 alloy, offering exceptional acceleration, grip, and top-end speed for its size.

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

If your boat tends to over-rev or you’re looking to gain better top-end control and fuel efficiency, the 17-pitch SpitFire X7 is a great fit. It’s also ideal for boats that need added lift and responsiveness.

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

Yes. Its stainless steel construction and polished finish protect against corrosion, making it equally reliable in both environments.

Q5: What hub system does it use?

It requires a Mercury hub kit (sold separately) for secure installation and smooth, vibration-free performance.