Turning Point Propellers Express Mach4 Left Hand 14" x 21" Stainless Steel 4-Blade Propeller - Model EX-1421-4L

Express Mach4 - Left Hand - Stainless Steel Propeller - EX-1421-4L - 4-Blade - 14" x 21 Pitch

The Prop that put the "four" in Perfourmance! Turning Point's Four Blade revolutionized the propeller market when it was introduced. No one had ever produced a propeller with two different blade shapes (they call it Dual Geometry) for 90-300+hp applications. This prop is uniquely engineered with two blade geometries: (diagram label 2)two blades utilize the Hustler high performance variable rake and aggressive pitch design for incredible hole shot and cornering, and (diagram label 1) two blades utilize an offshore style design for high speed and maximum stern lift.

These props re-wrote the rules, proving that you can run a four blade that has unprecedented hole shot, handling, and rough water stability without the top-end speed loss you experience with other manufacturers propellers.

Now manufactured in our Industry leading TP17 stainless, the Express Mach4 series is perfect for any application that demands enhanced acceleration, cornering, and load carrying capabilities. This prop series is ideally suited for watersports, sterndrive boats, tri-toons, bay boats, and any vessel that can use stern lift. It is our best upgrade of older stainless designs from the 70s, 80s, 90s, and 00s, and will outrun most newer props, including five blade ski props.

Proprietary Stainless Steel, TP17

Formulated to meet the exacting requirements of the New Express Mach3 and Mach4 designs. 20% higher chromium content than the competition - more shine, better corrosion resistance. Almost 250% Stronger and 5X more durable than run-of-the-mill stainless steel. This new material allows Turning Point's Engineers and Designers the freedom to produce radical new designs that will help you wring the most performance out of your boat.

Large Free Flowing Exhaust Ports

Turning Point's Propeller Housings have massive Exhaust flow pathways. Their Propellers have 40% more exhaust flow Area versus competitive product. More exhaust flow and less backpressure can generate more horsepower. Like headers for your boat.

Turning Point manufactures Express propellers to fit 9.9(bigfoot)-300+hp Evinrude, Force, Honda, Johnson, Mariner, Mercruiser, Mercury, Nissan, OMC, Parsun, Suzuki, Tohatsu, Volvo Penta, and Yamaha Outboards and Sterndrives. Choose one of our Lifetime Warranty MasterGuard Installation Kits to fit your engine, then choose the propeller that matches your boating requirements. There are 3 and 4 blade, left and right rotation prop models with a variety of diameter and pitch options available for almost all boat types. Turning Point's Props Run Faster, Pull Harder, and Handle Better.

Note: A Hub Kit is required for installation of this propeller. See the Turning Point Selection Chart or the Prop Wizard for hub kit selection.

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.

The Turning Point Propellers Express Mach4 series offers a revolutionary four-blade design engineered for optimal performance across a wide range of boating applications. Featuring dual geometry blades, this propeller combines Hustler high-performance variable rake and aggressive pitch blades for exceptional hole shot and cornering with offshore-style blades that provide high speed and maximum stern lift. This innovative combination ensures superior handling, acceleration, and stability in rough water conditions without sacrificing top-end speed.

Manufactured from industry-leading TP17 stainless steel, the Express Mach4 delivers increased durability, corrosion resistance, and strength. With 20% higher chromium content than standard stainless steel, this propeller offers a bright finish and enhanced longevity, enabling it to withstand demanding marine environments. The robust material allows engineers to design radical blade geometries that maximize boat performance, making it ideal for watersports, sterndrive boats, tri-toons, bay boats, and vessels requiring enhanced stern lift.

Designed with large, free-flowing exhaust ports, the Turning Point propellers feature 40% more exhaust flow area compared to competitors. This design reduces backpressure and can generate additional horsepower, much like performance headers for your boat’s engine. Compatibility extends across a broad spectrum of outboard and sterndrive engines, including popular brands such as Evinrude, Mercury, Yamaha, Volvo Penta, and many others. To ensure a proper fit, a hub kit is required for installation, with available options tailored to your engine model.

Choosing the right propeller from the Turning Point lineup enhances your boat’s acceleration, handling, and load-carrying capacity. The Express Mach4 is a top-tier upgrade from older stainless steel designs and outperforms many newer five-blade ski props. Whether you're seeking increased hole shot, improved cornering, or better rough water stability, this prop delivers unmatched performance and reliability, backed by a lifetime warranty and the option of MasterGuard installation kits for a seamless setup.

Features:

• Dual geometry blades combine high-performance rake and offshore-style design for versatile performance

• Constructed from TP17 stainless steel with 20% higher chromium content for corrosion resistance and durability

• Large exhaust ports with 40% more flow area for increased horsepower and engine efficiency

• Compatible with a wide range of outboard and sterndrive engines including Evinrude, Mercury, Yamaha, and Volvo Penta

• Four-blade design optimized for acceleration, handling, stern lift, and rough water stability