Turning Point Express Mach4 EX-1421-4L Propeller, 14 x 21, 4-Blade, LH – 31502141

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

Designed for boating applications that benefit from stronger hole shot and handling, the Mach4 series brings together variable-rake performance blades and offshore-style blades. It is aimed at uses such as watersports, sterndrive boats, tri-toons, and bay boats, subject to correct engine and hub-kit fitment. Actual performance depends 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 to support acceleration, load carrying, and rough-water stability while maintaining top-end performance.
• TP17 stainless steel: Turning Point's proprietary material formulated for Express Mach3 and Mach4 designs.
• Corrosion resistance: Higher chromium content supports a bright finish and corrosion resistance.
• Large exhaust pathways: Free-flowing ports are designed to reduce backpressure.

Product Specifications

• Brand: Turning Point Propellers
• Series: Express Mach4
• Model: EX-1421-4L
• Manufacturer part number: 31502141
• Blade count: 4
• Diameter: 14 in.
• Pitch: 21 in.
• Rotation: Left-hand
• Material: TP17 stainless steel
• UPC: 652480200908
• Box dimensions: 8 in. H × 16 in. W × 16 in. L
• Packaged weight: 16.6 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 left-hand rotation before ordering.

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 range-level information does not establish compatibility of this specific EX-1421-4L with every engine from those brands.

The lifetime warranty described for MasterGuard installation kits applies to those kits, not as 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.