MERCURY Spitfire Pontoon 4-Blade Aluminum Propeller, 13.8" x 13" Right-Hand — Faster Acceleration & Flo-Torq II Hub

This Mercury Spitfire Pontoon propeller is engineered to deliver the traction and cornering control you expect from a four‑blade design, with blade geometry tuned to reduce time to plane and preserve cruising speed. Made from Mercury’s patented Mercalloy aluminum and shipped with a Flo‑Torq II Hub Kit, it’s designed for modern Mercury and Mariner outboards across a broad horsepower range. The combination of aggressive blade angles and a rugged hub makes it a common upgrade for pontoon owners seeking quicker acceleration, better handling in turns, and reliable minor‑impact protection for the drivetrain.

How will this prop affect acceleration and getting on plane?

Its four‑blade layout and aggressive blade geometry prioritize lift, helping the boat rise to plane faster than comparable three‑blade props. Expect a noticeable improvement in hole‑shot and midrange responsiveness without a major sacrifice to top speed.

• 16–25% faster acceleration versus many three‑blade equivalents
• Increased bow lift for quicker planing
• Smoother midrange throttle response for load changes

Will this prop work with my Mercury or Mariner outboard?

This model is compatible with a wide span of Mercury and Mariner outboards: from 40–60hp FourStroke BigFoot/Command Thrust units to 75–125hp TwoStroke and FourStroke engines (1978 and newer). Verify your engine’s thrust washer and prop nut part numbers in the owner’s manual to ensure proper fitment.

• Designed for pontoon applications on specified Mercury/Mariner engines
• Fits both BigFoot/Command Thrust and standard outboard models in listed HP range
• Check engine manual for thrust washer and prop nut compatibility

What materials and protection features are included?

Crafted from Mercury’s Mercalloy aluminum alloy, this prop delivers a balance of strength and ductility to withstand minor impacts without catastrophic failure. The included Flo‑Torq II Hub Kit provides a sacrificial element to absorb shocks and help protect the drivetrain from damage caused by sudden strikes.

• Patented Mercalloy aluminum for durability with controlled flex
• Flo‑Torq II Hub Kit 835257K1 included for impact protection
• Engineered for repeated use in recreational pontoon conditions

How will handling and top speed change in turns and loaded conditions?

The prop’s blade shaping improves bite through turns and under load, giving more predictable steering and better tracking when carrying passengers or gear. Top end remains competitive with many three‑blades, while the extra blade area helps maintain speed under heavier loads.

• Improved lateral grip for tighter, more controlled turns
• Maintains cruising speed even when the boat is heavily loaded
• Better tracking and reduced prop slip in tight maneuvers

Who is this for: The MERCURY Spitfire Pontoon 13.8" x 13" right‑hand prop is aimed at pontoon owners who want faster acceleration, firmer handling in turns, and a reliable, serviceable hub system. It’s a good fit for recreational pontoons running Mercury or Mariner 40–125hp outboards within the specified compatibility, especially for users who carry passengers or cargo regularly and want improved planing and midrange performance without losing cruising ability.