Turning Point Propellers 31512120 Express Mach3 OS 15.6x21 3-Blade Stainless Steel Propeller Left-Hand

The Turning Point Express Mach3 OS 31512120 is a high-performance 3-blade stainless steel propeller designed for serious boaters running 150-300+hp engines with 4.75" gearcases. This left-hand rotation propeller features a 15.6-inch diameter and 21-inch pitch, engineered to deliver exceptional acceleration, impressive bow lift, and class-leading cornering performance. The Express Mach3 OS represents the evolution of Turning Point's popular large-diameter propeller series, with refined cup geometry, leading and trailing edges, and aggressive progressive rake that maximize efficiency across all performance metrics.

Key Features:

• Proprietary TP17™ stainless steel construction—20% higher chromium content for superior corrosion resistance and shine
• 250% stronger and 5X more durable than conventional stainless steel propellers
• Large free-flowing exhaust ports with 40% more exhaust flow area versus competitive products
• Excellent hole shot acceleration and mid-range fuel economy
• Performance-tuned pitch, rake angles, and exhaust vents for optimized all-around performance
• Perfectly matched to large horsepower bay boats, offshore center consoles, and high-performance pontoons/tri-toons
• Fits 90hp+ outboards with 4.75" gearcases from all major manufacturers
• Compatible with Mercury Alpha One and Bravo One, and Volvo Penta SX sterndrives
• Fits COX, Evinrude, Honda, Johnson, Mariner, Mercury, MerCruiser, Nissan, OMC, OXE, Parsun, Suzuki, Tohatsu, Volvo Penta, and Yamaha engines

The large-diameter 3-blade design provides outstanding mid-range fuel economy, making it ideal for boaters looking to maximize time on the water while stretching fuel dollars. Requires 500-series installation/hub kit for applications under 200hp or 700-series kit for engines 200hp and above (sold separately).