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Description
Water Pump Impeller Kit – Fits Mercury/Force 25-50 HP Outboard Motors (Replaces 47-8508910, 47-850893, 47-8M0027792)Water Pump Impeller Kit Fits Mercury Force 25 50 HP Outboard Motors This water pump impeller kit is designed for a wide range of Mercury Marine, Mariner, Chrysler, and Force 25 50 HP, 2 stroke and 4 stroke outboard motors, covering models from 1994 to 2014. It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring reliable performance for your engine's cooling system. Engineered to meet or exceed original equipment
Water Pump Impeller Kit – Fits Mercury/Force 25-50 HP Outboard Motors
This water pump impeller kit is designed for a wide range of Mercury Marine, Mariner, Chrysler, and Force 25-50 HP, 2-stroke and 4-stroke outboard motors, covering models from 1994 to 2014. It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring reliable performance for your engine's cooling system.
Engineered to meet or exceed original equipment specifications, this kit provides an essential solution for routine maintenance or addressing cooling issues like engine overheating or a weak water stream from the tell-tale.
- Installation Type: Direct Replacement
- Material: Durable neoprene rubber impeller with a corrosion-resistant metal alloy hub.
- Key Component Included: Kit comes with the necessary impeller and drive key for a complete installation.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury | 47-85089-1 |
| Mercury | 47-85089-3 |
| Mercury | 47-85089-10 |
| Mercury | 47-85089-20 |
| Mercury | 47-8508910 |
| Mercury | 47-850893 |
| Mercury | 47-8M0024502 |
| Mercury | 47-8M0027792 |
| Sierra | 18-3057 |
| CEF Marine | 500315 |
| Mallory Marine | 9-45303 |
| QuickMariner | 8508910 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
Mercury/Mariner Outboards
| Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| 18 HP | 18 | 2-Stroke | Serial# 5837437-UP | 47-8508910 | |
| 20 HP | 20 | 2-Stroke | Serial# 6443973-UP | 47-8508910 | |
| 25 HP | 25 | 2-Stroke | Serial# 5705532-UP | 47-8508910 | |
| 25XD, 25 Sea Pro | 25 | 2-Stroke | Serial# 5705532-UP | 47-8508910 | |
| 25 HP (3 cyl) | 25 | 2-Stroke | Serial# E268781-UP | 47-8508910 | |
| 25 HP | 25 | 4-Stroke | 1998-2006 | 47-8508910 | |
| 30 HP Jet | 30 | 2-Stroke | Serial# G590000-UP | 47-8508910 | |
| 30 HP (2 cyl) | 30 | 2-Stroke | Serial# G053314-UP | 47-8508910 | |
| 30 HP | 30 | 4-Stroke | 1999-2006 | 47-8508910 | |
| 40 HP (2 cyl) | 40 | 2-Stroke | Serial# G053314-UP | 47-8508910 | |
| 40 HP (3 cyl) | 40 | 2-Stroke | Serial# G531301-UP | 47-8508910 | |
| 40 HP | 40 | 4-Stroke | Serial# G231123-G760299 | 47-8508910 | |
| 40 HP | 40 | 4-Stroke | Serial# G760300-T408999 (2:1 ratio) | 47-8508910 | |
| 40 HP | 40 | 4-Stroke | 1999-2007 | 47-8508910 | |
| 45 HP Bodensee | 45 | 4-Stroke | Serial# G231123-UP | 47-8508910 | |
| 45 HP | 45 | 4-Stroke | 1995-2000 | 47-8508910 | |
| 50 HP (3 cyl) | 50 | 2-Stroke | Serial# G590000-UP | 47-8508910 | |
| 50 HP | 50 | 4-Stroke | Serial# G231123-UP | 47-8508910 | |
| 50 HP | 50 | 4-Stroke | 1995-2000 | 47-8508910 |
Force/Chrysler Outboards
| Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| 25 HP | 25 | 2-Stroke | 1996-1998 | 47-850893 | Serial# E127700-E344999 |
| 40 HP | 40 | 2-Stroke | 1995-1999 | 47-850893 | Serial# E093700-E369299 |
| 50 HP | 50 | 2-Stroke | 1995-1999 | 47-850893 | Serial# E093700-E369299 |
| 75 HP | 75 | 2-Stroke | 1999 | 47-850893 | Serial# E345000-UP |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Water Pump Impeller Kit |
| Installation | Direct Replacement |
| Material | Neoprene Rubber with Metal Alloy Hub |
| Number of Blades | 6 |
| Impeller Height | 12.6 mm (0.50 inches) |
| Overall Diameter | 73.8 mm (2.91 inches) |
| Hub Shaft Diameter | 16.0 mm (0.63 inch) |
| Weight | 40 g (1.41 oz) |
| Housing Color | Black |
| Warranty | Lifetime (Varies by Manufacturer) |
| Other Technical Attributes | Includes impeller key #28-85119 |
Package Contents
- 1 x Water Pump Impeller (Replaces 47-8508910)
- 1 x Impeller Key (Replaces 28-85119)
Installation Guide
Professional installation is recommended. The following are general steps; always refer to your specific service manual.
- Safety First: Disconnect the battery and remove the spark plug wires.
- Access the Lower Unit: Shift the outboard into neutral and remove the bolts securing the lower unit (gearcase) to the upper driveshaft housing. Carefully separate the two halves.
- Open the Water Pump: Locate and unbolt the water pump housing, which sits on top of the lower unit.
- Remove Old Impeller: Slide the housing off to expose the impeller. Note the direction of the vanes, then remove the old impeller and the impeller key from the driveshaft.
- Clean and Inspect: Clean the inside of the housing and the wear plate. Inspect them for deep grooves, warping, or corrosion and replace if necessary.
- Install New Impeller: Lightly lubricate the new impeller and housing interior with marine grease. Place the new key in its slot on the driveshaft and slide the new impeller on, turning the shaft clockwise to bend the vanes into place.
- Reassemble: Install new gaskets and re-secure the water pump housing, torquing bolts to the manufacturer's specification.
- Reattach Lower Unit: Carefully guide the lower unit back into position, ensuring the driveshaft, shift shaft, and water tube align correctly. Secure the bolts.
- Test Operation: Reconnect the battery and start the engine in a test tank or with a water flusher. Confirm a strong, steady stream of water is exiting the tell-tale outlet.
Troubleshooting & FAQ
How do I confirm this impeller fits my specific engine?
The most reliable method is to match your engine's serial number to the ranges listed in the compatibility tables above. If you only have the model and year, ensure it is listed and does not have a specific serial number requirement that excludes it.
What are the signs of a failing impeller?
Common symptoms include the engine running hotter than normal, an intermittent or weak water stream from the "tell-tale" outlet, and in severe cases, an engine overheating alarm. The rubber can become brittle and cracked over time, reducing its pumping efficiency.
How often should I replace the water pump impeller?
For preventative maintenance, it is recommended to replace your impeller every 1-2 years or every 100-200 hours of operation, whichever comes first. This interval can vary based on usage conditions (e.g., saltwater vs. freshwater, sandy/silty water).
OEM vs. Aftermarket?
This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
How fast do you ship and how much does it cost?
We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
What is your warranty and return policy?
This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 5
beautiful!
Format: Kindle
The Prophet is a loftily written expose of the governing universal laws of love, rhythm, correspondence, cause and effect, dualism and polarity. I absolutely loved it and would not have understood it should it have presented itself to me earlier than this present moment. Deeply grateful for the lessons it beholds.
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Reviewed in the United States on June 4, 2025
★★★★★ 5
CLASSIC WORKS BUT SIZE & FORMAT ALMOST TOO SMALL TO READ
Format: Hardcover
This work is classic literature. But sadly, the product presentation doesn't make it clear how small the edition is -- 5x7 inches -- and how terribly small the font size is -- like 14 pt. It's really not readable -- but more a way to possess a treasured piece.
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Reviewed in the United States on April 9, 2025
★★★★★ 5
🏜️ Arrakis. Dune. Desert Planet.
Format: Paperback, Format: Paperback
Earlier this year, I decided to actively stop doom scrolling. With the help of Opal to limit my access to social media on my phone, I had a ton of time to kill. I didn't want to go back to playing video games, I have probably played enough video games for two lifetimes, and I could only spend so much time job hunting, so I decided to give reading a real shot.
Truth is, I never enjoyed reading as a kid. It always felt like homework, like something forced, and that took all the fun out of it.
So why did I pick Dune? I really enjoyed the movies by Denis Villeneuve, and something about the book pulled me in. At that point, I could not tell if I chose Dune or if Dune chose me.
📖 Now onto the actual review. 🚨 Spoiler Alert 🚨
“The mystery of Dune is not a problem to solve, but a reality to experience.”
Dune feels less like a book and more like entering a world that already exists. Published in 1965 by Chilton, a company better known for auto repair manuals, it is packed with politics, philosophy, religion, ecology, prophecy, drugs, hallucinogenics, and deep world building.
Following Paul Atreides (protagonist) from royal heir to outcast to leader of the Fremen to emperor felt like going through a transformation alongside him. I found myself learning about resilience, how to navigate a future you can see coming but cannot avoid, and what it really means to lead. Each chapter gave me something to think about.
Even more, Dune feels very relevant today given our current political climate. Power, manipulation, religion, and control over resources are all central themes, and they hit differently when you look at the world around you.
💡 Pro tip for reading Dune
Frank Herbert does not hold your hand. He drops you into a world filled with esoteric technology, unfamiliar terminology, and a culture with its own rules. It can feel overwhelming at first, but do not get discouraged if you do not understand everything right away. Let the world unfold as you go.
I ended up reading the first three books in the series, Dune, Dune Messiah, and Children of Dune, and then went back to re-read Dune. This review is based on that second read, and it is amazing how much more you pick up the second time through.
What also helped was reading the graphic novels alongside the book. They do not include every detail, but they stay faithful to the story and help bring the world to life visually.
Also, if you have not watched the recent movies directed by Denis Villeneuve, they are worth checking out. I saw them before reading, and they helped me better understand the characters and major plot points.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
I highly recommend it to all readers
Format: Mass Market Paperback
Dune
A book review by Nathan Poulson
Written by Frank Herbert in 1959, “Dune” is an epic adventure of political betrayal, ecological brinkmanship, and messianic deliverance. It won science fiction’s highest awards—the Hugo and the Nebula—and went on to sell more than twelve million copies during Herbert’s lifetime. The mantel piece of sci-fi, Star Wars, owes many of its’ widely popular ideas to Dune. To this day, it is still acclaimed by readers and critics alike as a “science-fiction masterpiece”. I highly recommend it to all readers, as I believe it will put a new perspective on things, deepen your understanding, and excite you to the edge of your seat.
Dune follows the 15 year old boy Paul Atriedies and his mother, Jessica Atriedies in the very distant future. He is an only child of the duke of the Royal house of Atriedies. The house is given the stewardship over the desert planet of Arrakis or “Dune”, which controls the most valuable resource in the universe, the spice. On the planet where water is more valuable than gold, desert sand worms that are bigger than spaceships, life is lived to the extreme. With the spice comes a longer life span, increased perception, and in some cases prediction of the future, but at the cost of being highly addictive. The Harkonens, a noble house that previously owned the planet is intent on revenge and recapturing the spice. The spacing guild, which relies on the spice for navigating their spacecraft, is also intent on preventing anyone restricting or destroying their monopoly on space travel. Paul finds himself thrown into the mystery of Dune and its fierce natives, the Fremen. They think he is the savior their prophecy speaks of - is he destined to be the great preserver of their world or a false prophet to be purged? With multiple factions fighting, deceiving, and pulling strings, you never know quite what to expect in this awesome futuristic battleground.
One side I really like about Dune is that it is not just a distant sci-fi to be enjoyed, but a book to learn and understand from. I really enjoy the themes Herbert establishes in the plot; one of them including the danger of entrusting too much power to a super being. Although his themes might be very serious and almost depressing, I admire that he has the courage to end the story based in reality, instead of a unrealistic Hollywood ending with no depth.
Although the plot was very engaging, at some times the writing style really dragged things down. This can be a real turn off for even patient readers as Frank ambles around in unimportant details describing made up words and the very boring thought process of the characters. This is the one thing that made this otherwise a perfect book. Even though I thought the plot was almost pulling me down, somehow I still enjoyed it through the few sparks of almost perfect harmony when the style actually worked for the story.
What makes Dune so special is the pure atmosphere. You can really tell that Frank put in a lot of effort into his fictional world and society. Even though the story is set in another universe, the planets, the characters, and the motives seem very real. He had the worlds built before he set the plot on them; you can see he studied Greek and Near East history extensively to make this book really come to life.
Most books have characters that you can easily relate to. With Dune, it is a little bit harder to do that. In it, you have a story that instead of a personal account, it is more like a “retelling” and it is sometimes a little harder to relate to the feelings and values of the characters. My favorite character Paul is the most distant character for most of the book. Most of this isolation comes from the fact that people look to him as an idol, even though he still has human flaws. Throughout the book Paul is the character with the most burdens, and in constant pressure that he doesn’t measure up to other’s expectation of him. “They think they have a God, but I am only a man”. In reality he is a character we can all reflect from, he just has some layers in his personality that you have to peel away to really get to the core.
This book is near from perfect, but it still hits home. Frank Herbert has done a difficult thing that combines ancient myths and stories with laser guns and mind control. He was the first one to do it, and the last to do it so well. Even without its deeper meanings, this is still a great read to just casually absorb. I cannot explain to you how amazing this book really is; so experience it yourself and pick up a copy, you will be surprised to what it has to offer.
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Reviewed in the United States on December 15, 2015
★★★★★ 4
‘Dune’ Paved the Way for Surfer Proverbs and ‘Star Wars’ Alike
Format: Kindle
A Bene Gesserit proverb: “When religion and politics travel in the same cart, the riders believe nothing can stand in their way.”
I have to be honest, as a contemporary consumer of sci-fi film, small screen works and books, Frank Herbert’s 1965 Dune starts out slow. To be clear, I’m talking about the first half of some 800 pages. The reason why I stuck it out, though, is because I know the saga gets better as it continues (with Children of Dune being arguably the favorite). Known as one of the original sci-fi novels, I approached it like I would any classic piece of literature. And you know what? I’d put Dune in my personal cannon of classic lit because of it’s heavy influence on sci-fi … everything. That’s right, not even Star Wars would exist without Dune.
Herbert, a (sometimes struggling) freelance writer with a passion for ecology and a streak of utopian futurism, wrote Dune when he was almost 40 years old. At the time, sci-fi readers generally liked their stories short but this paperback was almost 900 pages. Not surprising, Dune wasn’t an overnight success but it’s popularity grew in the 1970s and 1980s.
Dune is set in a dry, distant future, where warring noble houses are kept in line by an interstellar empire. The noble duke Leto (heir apparent Paul Atreides’ father), head of the House Atreides, is forced to move his household from their perfectly good home planet to the desert planet of Arrakis (also known as Dune). The climate on Dune is practically inhabitable to the layman. Water is so scarce that whenever its inhabitants go outside, they must wear stillsuits, which capture body moisture and recycle it for drinking (it’s beyond nasty).
In a nutshell, the whole thing is a classic you killed my father and I’m going to get revenge coming of age story. Everything else revolves around the hot commodity on Arrakis, which is basically a very powerful and desired drug: Spice (melange). This cinnamon-scented substance is made from excretions of killer 1,000-foot sand worms (yes, I had a lot of Tremors flashbacks reading this book), gas, then exposure to the sun — but to mine it is very dangerous because said worms don’t like noise. At all.
The drug is crazy addictive but it’s also everywhere in small doses, so everyone that lives on or visits the planet has to stay, or else suffer fatal dopesickness. For empathic people, it helps explore the limits of personal identity and the mind’s relationship to the body. Daily use extends the lifespan by hundreds of years. Paul’s intellectual state (already Jedi-like due to his Bene Gesserit training) is heightened by the spice, causing some pretty spot-on nuggets of wisdom. Fear is a mind-killer.
“Fear is the little death that brings total obliteration. I will face my fear I will permit it to pass over me and through me. And when it has gone past me I will turn to see fear’s path. Where the fear has gone there will be nothing. Only I will remain,” Paul reminds his mother at one point. While commentary on fear is serious and quite important to ponder, I’m reminded of the advice from the late Patrick Swayze’s character in Point Break: “Fear causes hesitation. And hesitation causes your greatest fear to come true.”
By 1984 we had our very own Dune movie, directed by David Lynch (I’ve yet to see it but to be fair Lynch didn’t even like the cut that was released). Critics say an even better Dune movie came out later: Star Wars. Desert planets, evil emperors, a boy with a destiny, warring noble houses and a princess guarding spice — all things borrowed from Dune. There are mental Jedi powers like the Bene Gesserit, and even moisture farming like the Freman. Academics have written entire doctoral thesis on the topic.
What’s next? Well, I’m waiting for the new Dune feature film to come out (prob not until late 2020), directed by Dennis Villeneuve. A feat that’s proven difficult today due to the original book’s heavy influence on so many well-established sci-fi classics like Star Wars. Consequently, it’s been rumored difficult to get the screenplay right. But in July 2019, Herbert’s son Brian (who co-wrote prequels to the Dune saga after his father’s death) said he’s seen and is pleased with draft four of the screenplay … in the meantime, I’m reading Dune Messiah.
And drinking a tall glass of ice water.
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Reviewed in the United States on April 13, 2020
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