Mercury – SpitFire 4-Blade Aluminum Propeller | 13.4" Diameter x 15" Pitch | Right-Hand Rotation | Four Blades | Aluminum | Satin Finish | 8M8026580

Overview

There is a moment every boater remembers — that instant when your boat jumps onto plane, smooth and steady, without hesitation. The Mercury SpitFire 4-Blade Aluminum Propeller delivers that moment every single time. It’s built for boaters who want more than just movement; they want precision, balance, and control that feels effortless. From slow cruising to full-throttle runs, this prop gives your boat the kind of confidence that only comes from real-world engineering done right.

Key Features

• Diameter and Pitch: 13.4" Diameter x 15" Pitch
• Rotation: Right-Hand Rotation
• Blade Count: Four Blades
• Material: Patented Mercalloy Aluminum Alloy
• Finish: Satin Aluminum Finish
• Hub System: Flo-Torq II Hub Kit (835257K1) included for shock protection and quick installation
• Design Details: Aggressive blade geometry for better grip, lift, and acceleration with a smooth, balanced feel

Engine & Boat Compatibility

• Designed for Mercury and Mariner 40–60 HP FourStroke BigFoot/Command Thrust outboards
• Also fits Mercury 75–125 HP TwoStroke and FourStroke outboards (1978 and newer)
• Ideal for runabouts, fishing boats, and lightweight pontoons
• Works perfectly in freshwater and light saltwater conditions

Performance Benefits

The SpitFire 4-Blade Aluminum Propeller was made to challenge what boaters expect from a four-blade prop. It grips the water with confidence, delivering up to 25% faster acceleration than most three-blade props, but it doesn’t sacrifice top-end speed. From the moment you hit the throttle, you’ll feel clean, consistent thrust — no drag, no slip, just smooth forward momentum that gets you up on plane in seconds.

Cruising feels controlled and steady, even when conditions shift or your load changes. The four-blade design enhances lift and balance, giving your boat a firm, predictable feel through turns. That means no more skidding or tail wiggle when you make tight maneuvers. The prop’s precision-engineered blades cut cleanly through the water, reducing vibration and keeping your ride quiet and composed.

Durability is another strong suit. Crafted from Mercury’s exclusive Mercalloy aluminum, this prop combines the strength to handle tough conditions with enough flexibility to absorb minor impacts. It’s forgiving when you clip a log or graze a shallow bottom — tough where it counts, without punishing your engine or wallet.

Why This Prop Is a Strong Choice vs. Alternatives

• Quick Acceleration: Up to 25% faster than comparable three-blade props.
• Balanced Handling: Four-blade geometry keeps control tight, even in turns.
• Durable Build: Mercalloy aluminum construction resists corrosion and impact.
• Efficient Design: Delivers smooth cruising and impressive top-end performance.
• Hub Protection: Flo-Torq II system absorbs shock from minor underwater strikes.

FAQ Section

Q1: Which Mercury engines does the SpitFire 4-Blade Propeller fit?

It’s designed for Mercury and Mariner 40–60 HP FourStroke BigFoot/Command Thrust outboards and 75–125 HP TwoStroke and FourStroke engines from 1978 and newer.

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

This prop blends four-blade handling with three-blade speed, giving you faster acceleration, better lift, and tighter control — especially under load or during turns.

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

 If you run a lightweight fishing boat, runabout, or small pontoon powered by a Mercury engine in the 40–125 HP range, the 13.4" x 15" pitch setup is a versatile and efficient choice.

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

Yes. Its corrosion-resistant Mercalloy aluminum design performs reliably in both environments with simple freshwater rinsing after saltwater use.

Q5: What hub system does it use?

It uses Mercury’s Flo-Torq II Hub Kit, which cushions the drivetrain against impact and allows easy prop changes when needed.