MERCURY Spitfire 4-Blade Aluminum Propeller 12.8in x 17in Right-Hand — Quicker Acceleration & Better Handling

The MERCURY Spitfire 4-blade aluminum propeller (12.8" diameter × 17" pitch, right-hand rotation) is a performance-focused replacement prop that improves handling and acceleration for compatible Mercury and Mariner outboards.

Designed for anglers and recreational boaters who want the control of a four-blade prop without sacrificing speed, the Spitfire blends aggressive blade geometry with Mercury's patented Mercalloy aluminum. It fits a wide range of Mercury and Mariner engines (40–60hp FourStroke BigFoot/Command Thrust and 75–125hp TwoStroke and FourStroke models from 1978 onward) and ships with a Flo-Torq II hub kit to help protect your drivetrain from common impacts.

How does this propeller change acceleration and top speed?

The Spitfire's four-blade layout plus tuned blade geometry gives stronger bite in the water, producing quicker hole-shot acceleration than many three-blade props while maintaining competitive top-end speeds. You’ll notice quicker plane and faster initial responsiveness, with a design that balances thrust and drag.

• 16–25% faster acceleration compared to a comparable three-blade prop, per Mercury engineering
• Aggressive blade shape provides better thrust for quick planing
• 12.8" diameter and 17" pitch tuned for responsive midrange performance

Will this prop fit my Mercury or Mariner outboard?

The Spitfire is intended for Mercury and Mariner outboards in specific horsepower ranges: 40–60hp FourStroke BigFoot/Command Thrust and 75–125hp TwoStroke and FourStroke models from 1978 and newer. Always verify fitment with your engine owner's manual and confirm required thrust washers and prop nut part numbers.

• Compatible with 40–60hp FourStroke BigFoot/Command Thrust engines
• Compatible with 75–125hp TwoStroke and FourStroke engines (1978+)
• Includes Flo-Torq II Hub Kit 835257K1; check manual for thrust washer/prop nut

What materials and features protect the prop and drivetrain?

Mercury-built Mercalloy aluminum balances strength and ductility so the Spitfire resists common impacts without being overly brittle. The included Flo-Torq II hub kit cushions the drivetrain from hard stops and strikes, reducing the chance of costly gearbox damage in many minor-contact situations.

• Patented Mercalloy aluminum alloy for durable yet forgiving blades
• Flo-Torq II Hub Kit 835257K1 included to absorb impact loads
• Precision casting and finishing for consistent balance and reduced vibration

How should I choose pitch and rotation for my boat setup?

This Spitfire is right-handed rotation with a 17" pitch—optimized to deliver a balance of acceleration and cruising speed for the listed horsepower range. If you're uncertain which pitch or rotation best suits your load, hull type, and typical operating RPM, consult Mercury fitment guides or your dealer for a tailored recommendation.

• Right-hand rotation propeller—standard for most outboard drives
• 17" pitch aimed at balanced acceleration and top speed for 40–125hp ranges
• Refer to engine manual and RPM targets when selecting final pitch

Who is this for? Boat owners who want sharper handling and faster acceleration without sacrificing top-end performance will benefit from the MERCURY Spitfire 4-blade propeller. It’s a practical upgrade for anglers, recreational boaters, and anyone running compatible Mercury or Mariner outboards who needs reliable, tested hardware with impact-protection features and OEM fitment. Check your engine manual for thrust washer and prop nut compatibility, and install with the included Flo-Torq II hub kit for best results.