Express Mach4 4-Blade Stainless Steel Propeller – 14.5" x 17" | Right Hand Rotation

Express Mach4 4-Blade Stainless Steel Propeller – 14.5" x 17" | Right Hand Rotation

The Express Mach4 14.5" x 17" is a high-performance 4-blade stainless steel propeller built for 90–300+ hp engines with 4.75" gearcases. Its patented Dual Geometry blade design pairs two blades optimized for aggressive hole shot and cornering with two blades shaped for high speed and maximum stern lift — delivering 4-blade acceleration and load-handling without the top-end speed penalty typically associated with four-blade props.

The 14.5" x 17" pitch is a mid-range option in the Mach4 lineup, offering a strong balance of hole shot, mid-range torque, and top-end speed. It’s particularly well suited to high-horsepower applications on heavier hulls or boats that carry variable loads and need consistent performance across conditions.

Key Features

• Dual Geometry blade design — Two blades use a high-performance variable rake profile for hole shot and cornering; two use an offshore-style design for top speed and stern lift. 4-blade handling with 3-blade top-end speed.
• Proprietary TP17™ stainless steel — 20% higher chromium content than standard stainless for superior corrosion resistance and a higher-gloss finish. Nearly 250% stronger and 5x more durable than conventional stainless steel.
• Lifts the hull higher under load — Increased stern lift reduces wetted surface area, minimizing speed loss when the boat is fully loaded — where a three-blade can lose up to 3 mph.
• Large free-flowing exhaust ports — 40% more exhaust flow area than competing designs reduces backpressure and improves horsepower delivery and hole shot.
• 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: 14.5" x 17"
• Blades: 4
• 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

Also Available

• Express Mach4 14.5" x 17" – Left Hand (Counter) Rotation — twin-engine port-side version
• Express Mach4 14" x 19" – RH — higher pitch, more top-end speed
• Express Mach4 15" x 15" – RH — lower pitch, maximum hole shot and stern lift
• Express Mach4 15.3" x 13" – RH — lowest pitch, maximum acceleration
• Express Mach3 14.25" x 17" – 3-Blade Stainless RH — 3-blade at similar pitch for maximum top speed
• Hustler 14.5" x 17" – 4-Blade Aluminum RH — aluminum option at the same pitch and blade count
• Hustler 14.5" x 17" – 4-Blade Aluminum LH

Parts Desk Insights

Best use case: The Mach4 14.5" x 17" is the right recommendation for high-horsepower applications (90–300+ hp) where the customer wants the best combination of hole shot, stern lift, and load-carrying performance from a stainless 4-blade prop at a mid-range pitch. The 17" pitch is a strong all-around choice for watersports boats, tri-toons, bay boats, and sterndrives that carry variable loads — it delivers meaningful acceleration and speed under load without being pitched so low that it sacrifices top-end performance. If the customer’s engine has WOT RPM headroom and they want more top-end speed, step them up to the Mach4 14" x 19". If they prioritize pure top-end speed over load handling, the Mach3 14.25" x 17" 3-blade is worth comparing. For customers who want the same pitch and blade count in aluminum, the Hustler 14.5" x 17" 4-blade is the direct aluminum equivalent. 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.