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Description
PSS Shaft Seal 2-½" Shaft 3-½" TubePSS Shaft Seal 2 1 2" Shaft 3 1 2" Tube Shaft Diameter: 2 1 2" Stern Tube Diameter (D): 3 1 2" to 3 5 8" Total Length (A): 9. 625" Total Length (compressed) (Compressed A): 8. 375" Rotor Diameter (B): 4. 2" Carbon Cuff Diameter (C): 3. 75" Stern Cuff Length (E): 2" The PSS Shaft Seal is the number one selling marine mechanical seal worldwide and is installed as standard equipment by many of the worlds most reputable boat builders yards. The PSS Shaft
PSS Shaft Seal 2-1/2" Shaft 3-1/2" TubeShaft Diameter: 2-1/2"
Stern Tube Diameter (D): 3-1/2" to 3-5/8"
Total Length (A): 9.625"
Total Length (compressed) (Compressed A): 8.375"
Rotor Diameter (B): 4.2"
Carbon Cuff Diameter (C): 3.75"
Stern Cuff Length (E): 2"
The PSS Shaft Seal is the number one selling marine mechanical seal
worldwide and is installed as standard equipment by many of the worlds most
reputable boat builders / yards. The PSS Shaft Seal is also recognized as
the premiere retrofit (aftermarket) seal on the world market. Certified by
Bureau Veritas, ABS & Rina: Boat builders / yards recognize the advantages
and value of installing the PSS as it eliminates the maintenance, constant
adjustment & cost associated with traditional packing type glands. Aside
from these benefits, the PSS Shaft Seal helps to eliminate water in the
bilge (100% water tight) & wear to the propeller shaft. The PSS Shaft Seal
can be easily retrofitted and is available for shafts ranging from 3/4"
(20mm) to 6" (150mm).
The PSS Shaft Seal is a mechanical face seal that is created between
the flat surfaces of the rotating stainless steel rotor and the stationary
carbon flange. The stationary carbon flange is attached to the vessels stern tube with hose clamps and the carbon flange is attached to the front side of the bellows with hose clamps. The stainless steel rotor is fit on the shaft
in front of the carbon flange. The stainless steel rotor is used to compress the bellows before the collar is secured to the shaft with set-screws. This
compression (pre-load) maintains contact between the faces and allows the
PSS to compensate for the thrust from the propeller. The carbon flange is
bored larger than the shaft diameter allowing it to "float" around the shaft and thus compensate for most misalignment and vibration problems. The
stainless steel collar is sealed to the shaft by two o-rings that are
recessed into the bore of the collar. These o-rings rotate with the shaft
and stainless steel rotor and do not experience wear during operation.
**As with any rubber hose below waterline, the PSS bellows must be inspected on a regular basis for any sign of wear, aging or chemical deterioration.
PYI suggests as preventative maintenance that the PSS bellow be replaced in
six year intervals. During bellows replacement it is recommended the o-rings & set screws in the stainless steel rotor also be replaced."
Bellows may need to be more frequently inspected in an environment where
non-sealed batteries emit sulfuric acid. Sulfuric acid vapor will accelerate rubber deterioration, as will an ozonater.
The Maintenance Kit includes the items you need to properly maintain your
PSS Shaft Seal. Included in the kit is one (1) PSS bellow, two (2) O-rings,
five (5) set screws, four (4) new hose clamps and an allen key.
Manufacturer Part Numbers: 02-212-312
Brochure Literature (PDF)
Installation Guide (PDF)
GRP:WRO
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4.3 ★★★★★
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Product Reviews
★★★★★ 5
Unpacks Nazi rhetoric & makes it relevant to today
Format: Kindle
Ron Chernow’s best book ... unpacks Nazi rhetoric and makes it relevant to today. While I read his other books, honestly this book was far more impactful. I realized how little I knew about specific families and citizens in Germany during the rise of the Third Reich. While the Warburg family was extremely wealthy and atypical, they were very savvy yet still were very aligned to country which caused them to underestimate what was happening in Germany. I love to read about US leaders, but by reading this, realized I need to get out of US history and into global history. Also, while the Warburg brothers were the main focus, I appreciated focus and development of the important woman in the narrative.
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Reviewed in the United States on February 24, 2018
★★★★★ 5
A Comprehensive Framework for Tackling Complexity with Confidence
Format: Kindle
Strategic Problem Solving is a powerhouse of a guide for anyone navigating today’s fast-paced, high-stakes business environment—or just dealing with tough challenges in general. Mark Hartley distills years of expertise into an actionable, easy-to-follow framework that makes complex decision-making feel manageable.
The seven-step framework is the star of this book, offering a logical, systematic approach to breaking down big problems and creating solutions that stick. Each chapter walks readers through a specific phase of problem-solving, from defining the problem with precision to communicating and implementing solutions with clarity and impact. This isn’t just theory—every concept is illustrated with real-world examples, case studies, and practical tools like flowcharts and work plans.
What makes this book stand out is its versatility. It’s perfect for professionals like executives, consultants, and managers, but the ideas can also apply to personal challenges. The tools for critical thinking, prioritization, and creative innovation feel universally relevant. Hartley’s writing is clear and concise, making even complex strategies approachable.
One of my favorite aspects is the emphasis on real-world application. For example, the chapter on disaggregating problems compares tackling a challenge to scaling a mountain, encouraging readers to “break the mountain into hills.” It’s practical advice that sticks, and the accompanying tools like mind maps and timelines make it easy to translate into action.
This book is more than just a manual for solving business problems—it’s a mindset shift. It helps you think critically, lead confidently, and make smarter decisions. Whether you’re managing a team, driving innovation, or simply trying to up your problem-solving game, this guide will be an invaluable resource.
Highly recommended for leaders, thinkers, and anyone striving to navigate complexity with skill and precision!
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Reviewed in the United States on December 19, 2024
★★★★★ 5
Mastering Strategic Problem Solving
Format: Kindle
This book offers a comprehensive approach to tackling complex challenges through a practical, step-by-step framework. It guides readers in defining and breaking down problems, prioritizing for impact, and implementing solutions effectively. A notable strength is its emphasis on real-world application, featuring case studies and examples from diverse industries that demonstrate the framework in action.
The chapter "Disaggregate the Problem into Smaller Pieces," for example, introduces the concept of disaggregation by comparing a complex problem to a towering mountain that becomes manageable when broken into smaller hills. This vivid metaphor, coupled with examples like successful product launches, illustrates how breaking challenges into components reduces cognitive load and sharpens focus. Tools such as mind mapping and flowcharts are explained in detail, enabling readers to visualize relationships and streamline decision-making processes.
Aimed at consultants and aspiring professionals, this guide equips readers with the mindset and techniques to solve problems strategically. While insightful and well-structured, its academic tone may appeal more to professionals than casual readers. Nonetheless, its clear methodology and actionable exercises make it an excellent resource for anyone seeking to enhance their decision-making skills.
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Reviewed in the United States on December 14, 2024
★★★★★ 4
A very good and helpful book
Format: Kindle
This book provides a well-structured, step-by-step approach to tackling challenges effectively. The book outlines a seven-step process, beginning with defining and identifying the problem, and then walks the reader through practical techniques like mind mapping, prioritization, and overcoming decision paralysis. Further, one of the book’s strengths is its wealth of real-world examples and case studies, which make the concepts tangible. The discussion on managing time in problem-solving, critical thinking, and addressing communication barriers is particularly insightful. Additionally, Heartly introduces useful frameworks such as the "inner matrix" and role mapping, which help in breaking down complex problems into manageable parts. While the content is valuable, the writing can feel a bit wordy, and some sections could flow more smoothly. The references are also quite small (in the ebook), making them a bit difficult to read. However, these are minor drawbacks in an otherwise solid guide.
Overall, this book is a great resource for anyone looking to enhance their problem-solving skills, whether in business, leadership, or personal decision-making.This book offers a clear, seven-step approach to tackling challenges. It provides practical tools like mind mapping, prioritization, and role mapping, with real-world case studies to illustrate key points. The book effectively covers critical thinking, time management, and communication barriers.
While the writing can be wordy and the references small, the content is valuable. A solid resource for anyone looking to improve their problem-solving skills.
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Reviewed in the United States on March 28, 2025
★★★★★ 5
Turn Challenges into Opportunities
Format: Kindle
If you’ve ever struggled with solving a tough problem and wished for a clear path forward, "Strategic Problem Solving" is exactly the guide you need. This book breaks down the art of solving complex issues into easy-to-follow steps. It is a fantastic resource for anyone looking to make smarter decisions, lead effectively, and drive innovation.
Hartley takes what could be a daunting process—like understanding data, thinking critically, and finding innovative ideas—and explains it step by step in a manageable way. If you are in a leadership role, running a business, or just trying to improve your decision-making skills, you will find the strategies in this book useful and relevant.
Hartley uses relatable examples to show how these techniques can work in real situations, making connecting the dots between theory and practice easier. He also highlights the role of data in making better decisions but keeps it approachable, even if you don’t have a technical background. It’s not about numbers for the sake of numbers—it’s about how to use the information you have to make smarter choices.
One of the best things about this book is how it builds confidence. It’s not just about solving problems—it’s about thinking creatively, turning challenges into opportunities, and leading with purpose. By the end, you’ll feel more equipped to handle difficult situations at work or in your personal life.
"Strategic Problem Solving" is a great pick for anyone who wants to improve their ability to tackle hard problems. It’s practical, well-written, and full of tools that will make a real difference.
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Reviewed in the United States on November 27, 2024