Express Mach3 3-Blade Stainless Steel Propeller – 14.25" x 17" | Right Hand Rotation

Express Mach3 3-Blade Stainless Steel Propeller – 14.25" x 17" | Right Hand Rotation

The Express Mach3 14.25" x 17" is a high-performance 3-blade stainless steel propeller built for 90–300+ hp engines with 4.75" gearcases. Shaped from proprietary TP17™ stainless steel with race-proven blade geometry, it delivers maximum top-end speed, sharp acceleration, and precise handling. The 14.25" x 17" is a mid-pitch option in the Mach3 lineup — a strong all-around choice for high-horsepower applications where balanced performance across hole shot, mid-range, and top speed is the goal.

Key Features

• Proprietary TP17™ stainless steel — 20% higher chromium content than standard stainless for better corrosion resistance and a higher-gloss finish. Nearly 250% stronger and 5x more durable than conventional stainless steel, enabling more aggressive blade geometries.
• Performance-tuned pitch, rake, and exhaust vents — Aggressive cup profiles and optimized rake angles maximize speed and handling. Large free-flowing exhaust ports reduce backpressure for improved horsepower delivery and hole shot.
• Race-proven 3-blade design — Optimized for maximum top-end speed with best-in-class acceleration and cornering.
• Wide engine compatibility — Fits COX®, Evinrude®, Honda®, Johnson®, Mariner®, Mercury®, MerCruiser®, Nissan®, OMC®, OXE®, Parsun®, Suzuki®, Tohatsu®, Volvo Penta®, and Yamaha® outboards and sterndrives.

Specifications

• Diameter x Pitch: 14.25" x 17"
• Blades: 3
• Material: TP17™ Stainless Steel
• Rotation: Right Hand (Standard)
• Gearcase Fit: 4.75"
• Engine Range: 90–300+ hp
• Hub System: 500 Series (under 200 hp) or 700 Series (200+ hp) — sold separately

Hub Kit Required

A MasterGuard installation hub kit is required and sold separately. Use the 500 Series for engines under 200 hp, or the 700 Series for engines 200 hp and above. Mercury Verado® and ProXS® owners with a 1.25" fat shaft will need the MasterTorq® 621 FSH Fat Shaft Hub Kit instead. Refer to the application chart for your engine’s required kit number.

• MasterGuard Hub Kit 500 – 500 Series
• MasterGuard Hub Kit 502 – 500 Series
• MasterGuard Hub Kit 506
• MasterGuard Hub Kit 508
• MasterGuard 700 Series Hub Kit – 200+ hp

Compare Models

Looking for a different pitch, blade count, or rotation in this gearcase family?

• Express Mach3 14.25" x 17" – Left Hand (Counter) Rotation — twin-engine port-side version
• Express Mach3 14.25" x 19" – RH — higher pitch, more top-end speed
• Express Mach3 14.25" x 19" – LH
• Express Mach4 15" x 15" – 4-Blade Stainless RH — 4-blade for better load handling and stern lift
• Express Mach4 14.5" x 17" – 4-Blade Stainless RH — same pitch range, 4-blade upgrade
• Hustler 14.5" x 17" – 4-Blade Aluminum RH — aluminum option at similar pitch

Parts Desk Insights

Best use case: The Mach3 14.25" x 17" is the right recommendation for high-horsepower applications (90–300+ hp) where the customer wants a well-rounded stainless prop that performs across hole shot, mid-range, and top speed without being pitched so high that it sacrifices acceleration. The 17" pitch is a strong mid-range choice for a wide variety of hull types and load conditions — runabouts, performance boats, and sterndrives all benefit. If the customer’s engine has WOT RPM headroom and they want more top-end speed, step them up to the Mach3 14.25" x 19". If they regularly carry heavy loads or do watersports, the Mach4 14.5" x 17" 4-blade is worth comparing for the added stern lift and acceleration. For twin-engine setups, the LH version is available. Always confirm engine make, model, year, gearcase size, and current WOT RPM before finalizing a prop recommendation.