Turning Point Express Mach4 EX-1421-4 Propeller, 14 x 21, 4-Blade, RH – 31502131

The Turning Point Express® Mach4™ EX-1421-4 is a four-blade TP17™ stainless steel propeller with a 14-inch diameter, 21-inch pitch, and right-hand rotation. Its Dual Geometry blade design combines two profiles to support acceleration, cornering, load carrying, and stern lift.

For outings that involve watersports, heavier loads, or rougher water, the Mach4 series is designed to improve hole shot and handling while maintaining top-end performance. Select the correct propeller and installation kit for your engine; actual results depend on your boat, engine, load, and setup.

Key Features

• Dual Geometry design: Two blades use variable rake and aggressive pitch for hole shot and cornering; two use an offshore-style profile for high-speed performance and stern lift.
• Four-blade configuration: Designed for enhanced acceleration, load carrying, and rough-water stability.
• TP17 stainless steel: Turning Point's proprietary material formulated for its Express Mach3 and Mach4 designs.
• Corrosion resistance: Higher chromium content supports corrosion resistance and a bright finish.
• Large exhaust pathways: Free-flowing ports are designed to reduce backpressure.

Product Specifications

• Brand: Turning Point Propellers
• Series: Express Mach4
• Model: EX-1421-4
• Manufacturer part number: 31502131
• Blade count: 4
• Diameter: 14 in.
• Pitch: 21 in.
• Rotation: Right-hand
• Material: TP17 stainless steel
• UPC: 652480200892
• Box dimensions: 8 in. H × 16 in. W × 16 in. L
• Packaged weight: 16.85 lb

Fitment and Required Hub Kit

A hub kit is required for installation. Use Turning Point's Selection Chart or Prop Wizard™ to confirm the correct MasterGuard installation kit and propeller fitment for your exact engine. Verify that your installation requires right-hand rotation before ordering.

The Mach4 series is intended for applications such as watersports, sterndrive boats, tri-toons, and bay boats that benefit from stern lift, subject to correct fitment.

The broader Express range offers options for Evinrude, Force, Honda, Johnson, Mariner, Mercruiser, Mercury, Nissan, OMC, Parsun, Suzuki, Tohatsu, Volvo Penta, and Yamaha outboards and sterndrives. This does not establish compatibility of the EX-1421-4 with every engine from those brands.

MasterGuard installation kits carry the separately described lifetime warranty; that is not a warranty statement for this propeller.

Product Literature

• Quick Guide (PDF)
• Brochure (PDF)

Product Videos

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.