SKU: 17004304394

Turning Point Express Mach3 OS - Left Hand - Stainless Steel Propeller - OS-1621-L - 3-Blade - 15.6" x 21 Pitch [31512120]

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Description

Turning Point Express Mach3 OS - Left Hand - Stainless Steel Propeller - OS-1621-L - 3-Blade - 15.6" x 21 Pitch [31512120]Express Mach3 OS Left Hand Stainless Steel Propeller OS 1621 L 3 Blade 15. 6" x 21 Pitch The Express Mach3 OS Series of Stainless Steel Propellers are the next step in the evolution of our very popular larger diameter VO series. Our Engineers and Propeller Experts made improvements to the cup, leading and trailing edges, and the aggressive progressive rake and blade geometry that are Turning Point hallmarks. These modifications have produced a

Express® Mach3™ OS™ - Left Hand - Stainless Steel Propeller - OS-1621-L - 3-Blade - 15.6" x 21 Pitch

The Express® Mach3™ OS™ Series of Stainless Steel Propellers are the next step in the evolution of our very popular larger diameter VO series. Our Engineers and Propeller Experts made improvements to the cup, leading and trailing edges, and the aggressive progressive rake and blade geometry that are Turning Point hallmarks. These modifications have produced a propeller with excellent hole shot, impressive bow lift, and class leading cornering. 

The Express Mach3 OS is perfectly matched to large horsepower bay boats, offshore center consoles, and high horsepower pontoons/tri-toons. It will fit all 90hp and larger 4.75" gearcase outboards from all engine manufacturers, and Mercury® Alpha One™ and Bravo One™, and Volvo® Penta® SX sterndrives. Large diameter three blade propellers offer great mid-range fuel economy in many applications. Whether you are looking to maximize your time on the water, extend your cruise range, or just stretch your fuel dollars, the Express Mach3 OS is a great choice to get the most out of your boat.

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.

Specifications:

  • Diameter (Inches): 15.6"
  • Material: Stainless Steel
  • Pitch: 21
  • Rotation: Left
  • Box Dimensions: 8"H x 16"W x 16"L WT: 17.85 lbs
  • UPC: 652480206542

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Exchange/Return Notes
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SKU: 17004304394

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4.1 ★★★★★
Based on 16 reviews
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Product Reviews
M
Verified Purchase
Marilee
Houston, US
★★★★★ 5
a book that needed to be written!
Format: Kindle
Force of Nature is a wonderful book that needed to be written. A true -life adventure story that conveys the physical and emotional journey of a woman in her 50s who goes on a hike few dare try. The writing is incredibly sensory—full of everything she sees, feels, tastes and smells out in the wild. It’s a story of frustration and achievement, of triumphing over internal anxiousness and very real dangers and climbs. Beautiful writing, full of hope, great for book clubs and as a gift for nature-lovers. Hit the trail with Force of Nature!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
B
Verified Purchase
Barbara R
Charlottesville, US
★★★★★ 4
Enjoyable, entertaining, engrossing
Format: Kindle
The Three Women, their JMT trail name, is a delightful read. You experience the beauty of nature and the wonders seen in the trail. You also experience the fear and anxiety that come with making such a trek. The bonds of friendship and support between the three and also all the other through hikers. An amazing read, the perfect balance of nature, friendship, compassion, struggle, and determination. Immerse yourself in this well written book.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2024
P
Verified Purchase
PF Moore
Lexington, US
★★★★★ 5
An epic adventure, page after page!
Format: Paperback
Many women dream of making this hike (I once did) but few lace up their boots and get on the trail. And even a tiny fraction of those who DO realize their goal, could capture the experience like Joan Griffin. I read several chapters a night and always looked forward to getting back on the trail with her from my rocking chair. The grandeur of the sights, the wonder of seeing the world well above 8,000 feet ~ for 27 days ~ reads like a personal diary. Every perspective, high and low, is captured: the practical issues of carrying on even with a twisted ankle on Day 1, then blisters, surviving sudden weather changes, confronting inner doubts, securing essential food and water, and losing the camera enrich the book in an authentic style. In between all this, the reader remembers that it all took place with 40 pound backpacks on their backs! It's a magical but real-life journey with the inevitable personality differences of the Three Women, as well as their uniquely personal reasons to hike. As the brave heroes arrive to the finish line, one is aware of the power of grace that accompanied them all along. Yes, this experience changed the hikers but it also changes the reader. Being aware of those who live curiously and courageously provides a kind of encouragement for us to do the same, even after age 50.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 12, 2024
A
Verified Purchase
Alicia Crumpton
Waukegan, US
★★★★★ 5
Inspirational Read
Format: Paperback, Format: Paperback
Griffin, J. M. (2023). Force of nature: Three women tackle the John Muir Trail. Black Rose Writing. Joan Griffin loves exploring and lives in the Northern California foothills of the Sierra Nevada. Five legs, 27 days, 195.9 miles, this is a memoir of three 50+ women hiking the John Muir Trail located in the Sierra Nevada Mountain range. Each day receives its own chapter providing a vivid description of the trail, challenges, and beauty. Walking created an "unpredictable reality," that was "bigger in every conceivable way than [her] imagination could have conjured." As you read through the story, you are transported to the trail, so vivid her recollections and descriptions of their experiences. She wore a necklace with the words strength, courage, and spirit; a mantra that served her well along the journey. Griffin found: "I found my very soul had acclimated to the natural world, and I was completely in tune with the Earth and the sky and the water surrounding me." Such an inspiring memoir! This would be a good read for 50+ women who need a good dose of inspiration, those who like travel memoirs, and those interested in long-haul walking.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 23, 2024
C
Verified Purchase
CJM
West Palm Beach, US
★★★★★ 5
Arm chair traveling on a cold winter retreat
Format: Paperback
This was the perfect book to get me back into reading! I’ve happily filled my evenings, transported to the John Muir Trail traveled by The Three Women. Your descriptions of such an immense beauty and reflections of your personal journey were at times like being on the trail with you all! An inspirational read!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 29, 2025

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