Mercury – SpitFire X7 4-Blade Stainless Steel Propeller | 13.5" Diameter x 15" Pitch | Right-Hand Rotation | 4-Blade | Stainless Steel | Polished Finish | 8M0151361

Overview

There’s a certain kind of thrill that only comes when your boat leaps out of the hole and cuts across the water like it was born to run. The Mercury SpitFire X7 13.5x15 Right-Hand 4-Blade Stainless Steel Propeller (8M0151361) delivers that feeling every time you hit the throttle. It’s fast, sure-footed, and confident—like it knows exactly what you want before you do.

You’ll feel it in the way the prop grips the water, in how quickly your boat planes, and in how steady it stays when you’re trimmed out and flying. It’s made for boaters who chase performance and don’t settle for “good enough.” Whether you’re carving a turn at high speed or cruising with the throttle backed off, the SpitFire X7 gives you control that feels effortless and precise.

Key Features

• Diameter and Pitch: 13.5" Diameter x 15" Pitch
• Rotation: Right-Hand Rotation
• Blade Count: 4-Blade Design
• Material: Mercury X7 Stainless Steel Alloy (30% stronger and four times more durable than standard stainless steel)
• Finish: Polished Stainless Steel
• Hub System: Requires a Mercury hub kit (sold separately)
• Design Details: Small-diameter, aggressive blade geometry with Performance Vent System (PVS) for customizable hole shot and acceleration tuning

Engine & Boat Compatibility

• Works with 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
• Designed for both freshwater and saltwater conditions

Performance Benefits

This prop isn’t just quick—it’s alive with energy. The SpitFire X7’s smaller diameter and refined four-blade design let it grab the water instantly, giving you a strong, clean hole shot and sharp acceleration. You’ll feel that confident “bite” as the prop lifts your boat onto plane faster, with less bow rise and more control. Once you’re running, it stays rock-solid through turns, tracking with precision that inspires confidence no matter the water conditions.

The secret lies in Mercury’s exclusive X7 stainless steel alloy, which delivers remarkable strength without adding unnecessary weight. It’s designed to handle high loads and impacts while maintaining its shape and balance season after season. The Performance Vent System (PVS) lets you fine-tune the hole shot to your specific setup by swapping vent plugs—so you can dial in the feel and response exactly the way you want it. It’s that personal touch that turns a great prop into a perfect one.

Why is this prop a strong choice vs. alternatives?

• Mercury OEM Precision: Designed and tested by Mercury engineers for exact fit, reliability, and peak performance.
• High-Speed Confidence: Aggressive geometry delivers incredible acceleration and top-end speed without sacrificing handling.
• Built for Real-World Boating: Strong, corrosion-resistant stainless steel handles freshwater, saltwater, and impact-prone environments with ease.
• Customizable Control: The PVS system lets you fine-tune acceleration for your boat and conditions.
• Durability that Lasts: The X7 alloy resists bending and wear, maintaining consistent performance over years of use.

FAQ Section

Q1: Which Mercury engines does the SpitFire X7 fit?

It fits Mercury and Mariner 40–60 HP Command Thrust outboards with a 4.25-inch gearcase, as well as Mercury 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 X7 alloy for unmatched acceleration, grip, and durability. It’s built for boaters who demand performance in every condition.

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

If you’re running a midrange Mercury outboard and want more acceleration, stronger grip in turns, and improved top speed, the 15-pitch SpitFire X7 is a great choice. Always verify your engine’s recommended RPM range.

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

Yes. The stainless steel construction and polished finish offer excellent corrosion resistance, making it equally effective in both environments.

Q5: What hub system does it use?

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