Turning Point Express Mach3 OS-1613 Stainless Propeller, 15.625 x 13, RH, 3-Blade

Large-diameter performance for high-horsepower boats

The Turning Point Express Mach3 OS-1613 combines a 15.625-inch diameter, 13 pitch and right-hand rotation with three blades and TP17 stainless steel construction. Developed from Turning Point's larger-diameter VO series, the OS design incorporates refinements to the cup, leading and trailing edges, progressive rake and blade geometry to support hole shot, bow lift and cornering.

The OS series is intended for large-horsepower bay boats, offshore center consoles and high-horsepower pontoons and tri-toons. Its large-diameter three-blade design is intended to support mid-range fuel economy in suitable applications. Actual acceleration, handling, fuel economy and cruising range depend on your boat, engine, load and setup.

Verify fit and select the required hub kit

A hub kit is required for installation. Use the Turning Point Selection Chart or Prop Wizard to verify this model's fit and select the correct hub kit for your exact engine, gearcase or drive before ordering.

The supplied OS-series application guidance lists 90 hp and larger outboards with 4.75-inch gearcases, Mercury Alpha One and Bravo One sterndrives, and Volvo Penta SX sterndrives. This is series-level guidance, not confirmation that this specific diameter and pitch fits every engine or drive in those groups.

The broader Express family includes models for 9.9 hp Bigfoot through 300+ hp outboard and sterndrive applications from Evinrude, Force, Honda, Johnson, Mariner, Mercruiser, Mercury, Nissan, OMC, Parsun, Suzuki, Tohatsu, Volvo Penta and Yamaha. Family-wide coverage does not establish compatibility for this particular propeller. The advertised lifetime warranty applies to MasterGuard installation kits, not to this propeller.

Material and exhaust design

• TP17 stainless steel: Turning Point's proprietary material developed for Express Mach3 and Mach4 designs, with a focus on strength, durability and corrosion resistance.
• Advertised material comparisons: Turning Point describes 20% higher chromium content, almost 250% stronger material and five times greater durability versus competing or conventional stainless steel. The supplied copy does not identify comparison materials or test conditions.
• Large exhaust pathways: Designed to promote exhaust flow and reduce backpressure. Advertised exhaust-flow area is 40% greater than competing products; the comparison product is not identified.

Specifications

• Model: OS-1613
• Part number: 31511310
• Series: Express Mach3 OS
• Blades: 3
• Diameter: 15.625 inches (15⅝ inches)
• Pitch: 13
• Rotation: Right-hand
• Material: TP17 stainless steel
• Box dimensions: 9 inches H × 16 inches W × 16 inches L
• Listed shipping weight: 20 lb
• UPC: 652480206849

California Proposition 65 warning

WARNING: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

Documentation and videos

Quick Guide (PDF)
Brochure (PDF)