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Description
Water Pump Repair Kit – Fits Mercury 9.9–20 HP 4-Stroke Outboards (Replaces 8M0135821)Water Pump Repair Kit Fits Mercury 9. 920 HP 4 Stroke Outboards (Replaces 8M0135821) This water pump repair kit is designed for Mercury 4 Stroke 9. 920 HP outboard engines with serial numbers 0R833820 and above, including ProKicker and SeaPro models. It provides a direct replacement solution built to meet or exceed original equipment manufacturer specifications. Replaces the following part numbers: Mercury Quicksilver 8M0135821, 98 8M0135821, Mercury
Water Pump Repair Kit – Fits Mercury 9.9–20 HP 4-Stroke Outboards (Replaces 8M0135821)
This water pump repair kit is designed for Mercury 4-Stroke 9.9–20 HP outboard engines with serial numbers 0R833820 and above, including ProKicker and SeaPro models. It provides a direct replacement solution built to meet or exceed original equipment manufacturer specifications.
Replaces the following part numbers: Mercury/Quicksilver 8M0135821, 98-8M0135821, Mercury 8M0137849, and Tohatsu 3RS-87322-1.
- Engineered for a direct fit to the lower unit for straightforward installation.
- Produced to meet Mercury Marine original equipment manufacturer specifications for reliable performance.
- Complete kit includes the essential components for a water pump service: impeller, upper/lower housings, and plate.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury / Quicksilver | 8M0135821 |
| Mercury / Quicksilver | 98-8M0135821 |
| Mercury | 8M0137849 |
| Tohatsu | 3RS-87322-1 |
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.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | 4-Stroke Outboards | 9.9 | 4-Stroke | Serial numbers 0R833820 and above | 8M0135821 | Includes ProKicker and SeaPro models |
| Mercury | 4-Stroke Outboards | 10 | 4-Stroke | Serial numbers 0R833820 and above | 8M0135821 | Includes ProKicker and SeaPro models |
| Mercury | 4-Stroke Outboards | 15 | 4-Stroke | Serial numbers 0R833820 and above | 8M0135821 | Includes ProKicker and SeaPro models |
| Mercury | 4-Stroke Outboards | 20 | 4-Stroke | Serial numbers 0R833820 and above | 8M0135821 | Includes ProKicker and SeaPro models |
| Mercury | 2-Cylinder (333cc) | 9.9-20 | 4-Stroke | - | 8M0135821 | For 2-Cylinder 333cc engines |
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Tohatsu | MFS | 15 | 4-Stroke | 3RS-87322-1 | Cross-reference to Mercury 8M0135821 |
| Tohatsu | MFS | 20 | 4-Stroke | 3RS-87322-1 | Cross-reference to Mercury 8M0135821 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Water Pump Repair Kit |
| Installation | Direct replacement, requires common shop tools |
| Connection | Direct fit to lower unit |
| Dimensions | Weight: 0.63 lb (0.29 kg) Length: 4.25 in (108 mm) Width: 4.50 in (114 mm) Height: 6.25 in (159 mm) |
| Weight | 0.29 kg (0.63 lb) |
| Other Technical Attributes | Produced to meet Mercury Marine original equipment manufacturer specifications |
Package Contents
- 1 x Water Pump Repair Kit Assembly (Replaces 8M0135821)
- 1 x Water Pump Impeller
- 1 x Upper Housing
- 1 x Lower Housing
- 1 x Plate
Installation Guide
- Disconnect the battery and shift the outboard into neutral.
- Remove the propeller and drain the gearcase oil.
- Unbolt and carefully lower the gearcase from the drive shaft housing.
- Remove the old water pump housing bolts and lift the housing assembly off.
- Clean the mounting surfaces and inspect the driveshaft for any wear or damage.
- Install the new gaskets, plate, and impeller, ensuring the keyway is aligned.
- Lubricate the inside of the new housing and impeller with grease.
- Install the new housing, ensuring the impeller vanes are turned in the correct direction (clockwise).
- Tighten the housing bolts to the manufacturer's specified torque.
- Re-install the gearcase, making sure the water tube and shift shaft align correctly.
- Refill the gearcase with fresh oil and re-install the propeller.
- Reconnect the battery and test the engine in the water, verifying water is exiting the tell-tale port.
Troubleshooting & FAQ
Q: How do I confirm this kit fits my Mercury outboard?
A: This kit is designed for Mercury 4-Stroke 9.9–20 HP outboards with serial numbers 0R833820 and higher. Please use our Mercury Serial Number Guide to verify your engine's serial number before ordering.
Q: What are the signs of a failing water pump?
A: Common signs include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, or a melted/deformed pump housing upon inspection.
Q: How often should the water pump impeller be replaced?
A: For preventative maintenance, it is recommended to inspect the water pump impeller annually and replace it every 1-2 years or every 100-200 hours of use, depending on operating conditions (e.g., saltwater vs. freshwater).
Q: OEM vs. Aftermarket?
A: 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.
Q: How fast do you ship and how much does it cost?
A: 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.
Q: What is your warranty and return policy?
A: 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
4.8 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 3
3.5 stars, A little boring to say the least.
Format: Kindle
Wow so I'm not sure where to begin on this one. This was a very different take on the legend of Arthur and Excalibur. This is told from the point of view of Morgan the sister of Arthur. Honestly the first 50% of this book is world building and character building which unfortunately was super boring for me. Morgan to me was a female MC that had a hard time in believing in herself. Sometimes taking too long to understand exactly what was going on around her. Draven was also a different male MC, like I couldn't put my finger on him and what he was all about. It was not until the last 10% of the book did we get some answers on the mystery that is Draven. The other 50% of the book centered around this big journey with everyone having a different motive. We see a spark of magic around this time that had me excited but then we never expanded upon that and what it could mean for the female MC. I feel like I want to read the second book just to see where this goes, but the spice was probably a 2 out of 5. Side characters are ok, Lancelet was fun but I almost felt like I wanted more.
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Reviewed in the United States on September 13, 2023
★★★★★ 5
A bewitching retelling of Arthurian legend!
Format: Kindle
In a land where the Fae have nearly become only a legend and those who still posses even a morsel of the blood are few and far between, Morgan finds herself cast aside by most of society due to her rumored half-Fae lineage, including her brother, King Arthur. With the kingdom at the brink of war, Arthur entrusts her with a quest to retrieve a Fae weapon of legendary power: the sword of Perun, Excalibur. Accompanied by men she loathes, Captain Kairos Draven and Ragnar Whitehorn, she embarks on her long and unbeknownst perilous journey, only to find that things she once believed to be myth are in fact very real. With devastating twists, omitted truths, witty banter and fierce action, Queen of Roses leaves you begging to know more about the secrets of Aercanum!
Wow, wow, wow! Going into this story, I did not realize that it was going to be a retelling of Arthurian legend, especially not one with a fantastical twist! The unique spin almost gave me The Witcher vibes and I think adding Fae into the mix was quite interesting. I knew the basics of the legend but after reading this book, it has piqued my interest and makes me want to learn more about it. My attention was snatched as soon as I finished the prologue and I knew that I was going to devour this story. I truly enjoyed the gender swaps and even how Arthur was portrayed as villainous. Morgan’s past and even her parts of her present is absolutely heartbreaking, and I felt for her at times. I can only recall one other book that made me hate characters the way I despised Florian and Arthur, leaving me with my blood boiling and feeling disgusted. Even after finishing the book, Draven is still a mystery to me and I cannot figure out how to feel about him. I guess they just means that the author did an excellent job at conveying each character’s persona! The rich world building and imagery made it easy for me to visualize the places that the group visited along their journey. I am truly engulfed in this story and I cannot wait to see wait fate awaits Morgan and how the Fae will be even more incorporated in the next book!.
I received a free copy of this book and am voluntarily leaving a review.
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Reviewed in the United States on August 11, 2023
★★★★★ 4
Enchanting
Format: Kindle
"Queen of Roses" by Briar Boleyn is a delightful and refreshing reimagining of the classic tale of King Arthur, with a captivating twist that places the spotlight on Morgan, a character who has often been overshadowed in traditional retellings. Boleyn's creative decision to shift the narrative perspective to Morgan breathes new life into the story, offering readers an intriguing and compelling look at the Arthurian world from an entirely different angle.
One of the most commendable aspects of this book is its incorporation of Fae elements, which adds an enchanting layer of magic and mystery to the already familiar Arthurian setting. Boleyn skillfully weaves the world of the Fae into the narrative, creating a captivating backdrop against which the events of the story unfold. This addition not only adds depth to the world-building but also provides ample opportunities for twists and turns that keep readers thoroughly engrossed.
However, while the book boasts numerous strengths, it does have one noticeable flaw: the characterization of Morgan. While it is reasonable to create a flawed and complex protagonist, it appears that at times, Morgan's character becomes overly difficult and hard to relate to. Her persistently negative perception of one of the main male characters, who is a potential love interest, despite his efforts to support and assist her, may come across as somewhat irrational and could test the patience of some readers. Striking a balance between a strong, independent character and one who can recognize genuine support and affection could have enhanced the overall reader experience.
Nonetheless, the allure of "Queen of Roses" lies in its innovative approach to the Arthurian legend and its skillful blending of fantasy elements into a familiar narrative. Boleyn's evocative prose draws readers into a world where magic, destiny, and fate entwine, leaving us eager to uncover the mysteries that unfold within the pages.
I received a free copy of this book via Booksprout and am voluntarily leaving a review.
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Reviewed in the United States on July 28, 2023
★★★★★ 5
An action-packed dark romantasy
Format: Kindle
I loved this book! Queen of Roses is an Arthurian-inspired dark romantasy that is the first book in the Blood of Fae series. The story follows Morgan, the princess of Camelot who is rumored to be part fae. Fueled by prejudiced hatred and a mistrust of fae blood, Morgan’s abusive father strips her of her birthright and hands it to her half-brother, Arthur. Instead of becoming queen, Morgan is commanded to join the temple of the goddesses when she comes of age.
However, Arthur turns into a psychopathic, power-hungry, fae-hating king as he ages. He develops malevolent plans and commands Morgan to find an ancient weapon with legendary power. Although Morgan is wary of Arthur’s intentions, she embraces the opportunity to go on a journey and potentially change her fate.
The story picks up from there and we follow Morgan on her quest to find the ancient relic. It’s full of high stakes adventure, mystery, tension, banter, forced proximity, hidden magic, self discovery, and betrayal. This first installment of the series intricately develops the world building and character development. There’s little romance in this book, but it is evident that it is a slow burn that will continue to develop throughout the remainder of the series.
Overall, I loved the world building, the epic fantasy, Morgan’s journey of self discovery, and all of the twists and turns that set the stage for the future installments. I can’t wait to see what happens next!
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Reviewed in the United States on April 7, 2024
★★★★★ 4
Arthurian Fae Quest…say less.
Format: Kindle
A fae centered Arthurian tale unlike any I’ve read so far. The author did a great job at descriptive world building, with scenes easily playing out in my minds eye. There was plenty of action, suspense, and even a touch of horror. An enemies to lovers, slow burn romance, a quest, with plot twist and turns aplenty. There was a love triangle, which I’m not usually a fan of but, it played out well in this story line. The FMC, Morgan Pendragon, was so blatantly naïve, yet I typically expect as much in a ‘book one’ of a series, especially one that features a fairly sheltered princess. I was happy to read that in spite of this, she still showed a strong sense of morals, fire, and spine. Now our MMC? Kairos Draven, aka Void’s Edge. Oh, how I’m a sucker for a smoking’ hot grumpy warrior alpha with a witty mouth, and a strong sense of “touch her and die” attitude, so you know who held all my cards. That ending? Just made me swoon all the harder. Now add a battlecat that rivals the size of a horse…and well Ms. Briar Boleyn you have well and truly stolen my heart. I’m excited to see where the story goes from here, and follow along to see more of the characters growth. I went into this story fairly blind, and I think I enjoyed it all the more because of it.
Once the story got going, it had me in an absolute chokehold and it was difficult to put down.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2024
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