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Turning Point Propellers 31512510 Express Mach3 OS 15.6x25 3-Blade Stainless Steel Propeller

Manufacturer

Turning Point Propellers

<h3>About Turning Point Propellers</h3><p>Founded in 1997 and headquartered in Jacksonville, Florida, <strong>Turning Point Propellers</strong> has spent more than 26 years earning a reputation as one of the marine industry&apos;s most innovative propeller manufacturers. What started as a drive to engineer better-performing boat props has grown into a globally distributed brand trusted by recreational boaters, dealers, and OEM partners alike. The company&apos;s core philosophy is straightforward: <em>Run Faster. Pull Harder. Handle Better.</em></p><h3>A Legacy Built on Industry Firsts</h3><p>Turning Point&apos;s history reads like a timeline of marine propulsion innovation. The brand introduced the industry&apos;s first multi-manufacturer interchangeable hub propeller, the first full-color prop selection charts, and the first online Prop Wizard calculator to help boaters match the right prop to their engine. Later milestones include the first high-performance four-blade aluminum propeller and the first &ldquo;safer&rdquo; propeller design — the Aegis series — engineered to minimize harm to marine life at low boat speeds.</p><p>Today, Turning Point&apos;s lineup is organized around three flagship series: the <strong>Hustler</strong> aluminum propellers, the <strong>Express</strong> stainless steel propellers, and the <strong>Aegis</strong> safer-design series. Each is built to cover a wide spectrum of engine outputs, from small outboards in the 6 HP range up to powerplants exceeding 300 HP, and fits vessels ranging from bay boats and pontoons to tritoons and sterndrive applications.</p><h3>Engineering That Sets Turning Point Apart</h3><p>A key differentiator in Turning Point&apos;s manufacturing process is its exclusive squeeze-cast method for aluminum propellers. This technique virtually eliminates the voids and air pockets that weaken conventionally cast props, producing a tighter grain structure and stiffer blades that resist flex — translating directly into more efficient power transfer. Stainless steel Express props feature advanced pitch-line and rake-line cupping along with vented barrels that allow exhaust gases to escape during acceleration, improving hole-shot performance. Turning Point also applies a proprietary Ultracoat powder-coat finish to all aluminum propellers for a corrosion-resistant, high-gloss appearance that holds up in harsh saltwater and freshwater environments alike.</p><h3>Propellers for Every Boater</h3><p>The heart of the Turning Point catalog is its broad selection of <a href="/200673-propellers-turning-point-propellers-7621">Turning Point Propellers</a> — three- and four-blade designs in both aluminum and stainless steel, available in right- and left-hand rotation to suit virtually any outboard or sterndrive configuration. Whether you&apos;re looking to maximize top speed, improve fuel economy on long cruises, or gain better low-end pulling power for watersports, there is a Turning Point prop engineered for that purpose.</p><p>Equally important to a proper propeller installation is the hardware that supports it. Turning Point&apos;s line of <a href="/7621-turning-point-propellers-propeller-parts-accessories-200817">Propeller Parts &amp; Accessories</a> — including their patented MasterGuard hub kits — rounds out the system. The MasterGuard hub features a one-piece glass-filled nylon over brass spline design that eliminates the failures common in older multi-part sleeve-and-spline systems, while protecting engines and drives from shift shock and impact loads. Crucially, these hub kits are covered by the industry&apos;s only lifetime warranty and are compatible with Mercury Flo-Torq II, Michigan Wheel XHS, and Solas Rubex hub kit systems.</p><h3>Why Boaters Choose Turning Point</h3><ul style="list-style:disc"><li>Over 26 years of dedicated marine propeller engineering and manufacturing</li><li>Exclusive squeeze-cast aluminum process for stronger, flex-resistant blades</li><li>Industry-first interchangeable MasterGuard hub system with a lifetime warranty</li><li>Wide compatibility across major outboard and sterndrive engine brands</li><li>Prop Wizard tool to help boaters select the optimal pitch and diameter</li><li>Vertically integrated manufacturing from raw ingot to finished product</li></ul>

Part Number

31512510
09/12/2036 7:31 AM
Sale Price

$562.38

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Product Details

The Turning Point Express Mach3 OS 31512510 is a high-performance 3-blade stainless steel propeller designed for large horsepower marine applications. This 15.6-inch diameter, 25-pitch right-hand rotation propeller represents the evolution of Turning Point's popular larger diameter VO series, featuring advanced engineering refinements that deliver superior on-water performance.

Advanced Design Features:

  • Proprietary TP17™ stainless steel construction with 20% higher chromium content for enhanced corrosion resistance and superior durability
  • Refined cup design with optimized leading and trailing edges for improved water flow
  • Aggressive progressive rake and blade geometry for exceptional handling characteristics
  • Large free-flowing exhaust ports with 40% more exhaust flow area than competitive propellers
  • Performance-tuned pitch and rake angles for optimized all-around performance

Performance Benefits:

  • Excellent hole shot acceleration gets you on plane quickly
  • Impressive bow lift improves boat attitude and visibility
  • Class-leading cornering ability for confident maneuvering
  • Outstanding mid-range fuel economy extends your cruise range
  • Superior durability compared to aluminum propellers

Application:

  • Designed for 150-300+hp engines with 4.75-inch gearcases
  • Ideal for large horsepower bay boats, offshore center consoles, and high-performance pontoons/tri-toons
  • Compatible with outboards from COX, Evinrude, Honda, Johnson, Mariner, Mercury, Nissan, OMC, OXE, Parsun, Suzuki, Tohatsu, Volvo Penta, and Yamaha
  • Fits Mercury Alpha One and Bravo One, and Volvo Penta SX sterndrives
  • Requires 500-series installation/hub kit (under 200hp) or 700-series kit (200+hp) - sold separately

The TP17 stainless steel alloy is nearly 250% stronger than standard stainless steel, allowing for aggressive blade designs that maximize performance while maintaining exceptional durability. The increased exhaust flow reduces backpressure and helps generate more usable horsepower, similar to performance headers for your marine engine.

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