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Description
Water Pump Impeller Kit – Fits Yamaha 50-70 HP Outboards (Replaces 6H3-W0078-02-00, 6H3-W0078-A0-00)Water Pump Impeller Kit Fits Yamaha 50 70 HP Outboards (Replaces 6H3 W0078 02 00) This water pump impeller service kit is designed for a wide range of Yamaha outboard motors, including 2 Stroke 6070 HP (19922003) and 4 Stroke T50 FT50 T60 FT60 (1997UP) models. It provides all the necessary components for a complete overhaul of your outboard's water pump assembly. This kit is a direct replacement for Yamaha OEM part numbers 6H3 W0078 00 00, 6H3 W0078
Water Pump Impeller Kit – Fits Yamaha 50-70 HP Outboards (Replaces 6H3-W0078-02-00)
This water pump impeller service kit is designed for a wide range of Yamaha outboard motors, including 2-Stroke 60–70 HP (1992–2003) and 4-Stroke T50/FT50/T60/FT60 (1997–UP) models. It provides all the necessary components for a complete overhaul of your outboard's water pump assembly.
This kit is a direct replacement for Yamaha OEM part numbers 6H3-W0078-00-00, 6H3-W0078-A0-00, 6H3-W0078-02-00, and 6H3-44311-00-00. It also cross-references with Sierra part numbers 18-3461 and 18-3466.
- Complete Kit: Includes the impeller, wear plate, insert cup, gaskets, and water pump housing for a full service.
- Durable Materials: Features a neoprene impeller for flexibility and a nylon PA66 housing for corrosion resistance.
- Direct Installation: Engineered to meet OEM specifications for a direct fit and reliable performance.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Yamaha | 6H3-W0078-00-00 |
| Yamaha | 6H3-W0078-02-00 |
| Yamaha | 6H3-W0078-A0-00 |
| Yamaha | 6H3-44311-00-00 |
| Sierra | 18-3461 |
| Sierra | 18-3466 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.
Yamaha 2-Stroke
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 60F | 60 | 2-Stroke | 1997–2003 | 6H3-W0078-02-00 | |
| Yamaha | P60 | 60 | 2-Stroke | 1992–1999 | 6H3-W0078-02-00 | |
| Yamaha | E60 | 60 | 2-Stroke | 1995–1996 | 6H3-W0078-02-00 | |
| Yamaha | C60 | 60 | 2-Stroke | 1996–2001 | 6H3-W0078-02-00 | |
| Yamaha | 70 | 70 | 2-Stroke | 1992–2003 | 6H3-W0078-02-00 | |
| Yamaha | 70B | 70 | 2-Stroke | 1997–2003 | 6H3-W0078-02-00 | |
| Yamaha | C70 | 70 | 2-Stroke | 2000–2001 | 6H3-W0078-02-00 |
Yamaha 4-Stroke
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | T50 | 50 | 4-Stroke | 1997–2010 | 6H3-W0078-02-00 | |
| Yamaha | FT50B | 50 | 4-Stroke | 1997–2002 | 6H3-W0078-02-00 | |
| Yamaha | FT50C | 50 | 4-Stroke | 2003–2007 | 6H3-W0078-02-00 | |
| Yamaha | FT50G | 50 | 4-Stroke | 2005–2012 | 6H3-W0078-02-00 | |
| Yamaha | FT50J | 50 | 4-Stroke | 2013–UP | 6H3-W0078-02-00 | |
| Yamaha | T60 | 60 | 4-Stroke | 2003–2010 | 6H3-W0078-02-00 | |
| Yamaha | FT60B | 60 | 4-Stroke | 2003–2006 | 6H3-W0078-02-00 | |
| Yamaha | FT60D | 60 | 4-Stroke | 2005–2012 | 6H3-W0078-02-00 | |
| Yamaha | FT60G | 60 | 4-Stroke | 2013–UP | 6H3-W0078-02-00 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Water Pump Impeller Kit with Housing |
| Installation | Direct replacement |
| Housing Material | Nylon PA66 Plastic |
| Housing Color | Black |
| Impeller Material | Neoprene |
| Insert Cup Material | SS316 Stainless Steel |
| Weight | 0.65 lbs (0.29 kg) |
| Other Technical Attributes | Includes SS316 Insert Cup and Plate |
Package Contents
- 1 x Water Pump Gasket (688-44316-01-00/688-44316-A0-00)
- 1 x Water Pump Gasket (6H2-44315-00-00/6H2-44315-A0-00)
- 1 x Outer Plate Gasket (6H2-44324-00-00/6H2-44324-A0-00)
- 1 x Wear Plate (6H3-44323-00-00)
- 1 x Impeller (6H2-44352-00-00)
- 1 x Impeller Key (90280-03M03-00/90280-03M07-00)
- 1 x Insert Cup (663-44322-00-00)
- 1 x O-Ring (93210-46044-00)
- 1 x Water Pump Housing (6H2-44311-00-00)
- 2 x Bolt with washer (90119-08M14-00)
- 2 x Bolt with washer (90119-08M33-00)
Installation Guide
Follow these general steps to replace your water pump impeller kit. For detailed instructions specific to your model, consult your owner's manual or a professional mechanic.
- Safety First: Disconnect the battery and disable the ignition system.
- Access the Lower Unit: Shift the outboard into neutral. Remove the bolts securing the lower unit (gearcase) to the upper leg and carefully lower it.
- Remove the Old Pump: Locate the water pump housing on top of the gearcase. Unbolt and remove the housing to access the impeller and other components.
- Inspect and Clean: Clean the housing interior and mating surfaces. Inspect for scoring, warping, or corrosion.
- Install New Components: Lightly grease the new wear plate and insert cup. Install the new impeller, making sure to turn the driveshaft clockwise to bend the vanes in the correct direction.
- Reassemble the Pump: Install the new gaskets and O-ring. Secure the new water pump housing with the provided bolts, tightening them to the manufacturer's specified torque.
- Reinstall Lower Unit: Guide the lower unit back into place, ensuring the driveshaft, shift shaft, and water tube align correctly. Secure it with the mounting bolts.
- Test Operation: Reconnect the battery. Start the engine in a test tank or with a water flusher to confirm the pump is operating and water is exiting the tell-tale port.
Troubleshooting & FAQ
Q: How can I be sure this kit will fit my Yamaha engine?
A: The best way to ensure compatibility is to verify your engine's model and year against the lists in the "Compatible Engine Models" section. You can also match the OEM part numbers listed on your existing components to those in our "Part Number Cross-Reference" table.
Q: What are the signs that my water pump impeller needs to be replaced?
A: Common signs of a failing impeller include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "tell-tale" outlet port, and a dry, cracked, or brittle appearance of the old impeller upon inspection.
Q: How often should I replace my water pump impeller?
A: As a general maintenance guideline, it's recommended to inspect and/or replace your water pump impeller every 100-200 operating hours or at least once every 1-2 years, even if the engine isn't used frequently. This helps prevent unexpected failures on the water.
Q: What makes this kit different from others on the market?
A: This is a complete service kit that, unlike many basic kits, includes the water pump housing. This allows for a full replacement of all critical wear components, which is crucial if your existing housing is warped, cracked, or corroded.
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
4.3 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Proof that lightning strikes twice ... Weir has done it again!
Format: Hardcover
According to a 2003 article on the NASA website, "NASA-funded scientists have recently learned that cloud-to-ground lightning frequently strikes the ground in two or more places ..." and that the third and fourth strokes of a lightning flash will follow the same path as the second stroke. In other words, lightning DOES strike the same place twice.
But you don't need to search the web for this information. If you want proof that lightning strikes twice, just read Andy Weir's newest book, Project Hail Mary, and you'll see that Weir has created a giant sci-fi bestseller, in the same electric path as The Martian.
Ryland Grace has a puzzle on his hands. He wakes up without a clue as to where he is, but he seems to be alone except for a computer AI that was keeping him alive. Unfortunately it didn't seem to be doing the same for two others in his ... wherever he is ... as he notes the decayed corpses in their creches on the ... well, it's a ship. A space ship. And bit by bit Grace puts the pieces of the puzzle together.
An alien microbe has been discovered. Ryland Grace is brought on to the science team to learn more about the life form because Grace, currently a middle school science teacher, wrote papers about the notation that there does not need to be water to create life. Only in a biozone such as Earth's would water be needed, but other building blocks could be used in other systems.
The science community as a whole mocked Grace, which is why he left and went on to teach kids, but now, he may be the best suited to understand this new life form. And as he remembers more and more, he also remembers that this life form is feeding on the energy output of the sun, which is decreasing the energy that gets to Earth, which spells disaster - as in the end of all life as currently known - on Earth if something isn't done.
Scientists discover that Sol isn't the only star that is losing its energy output - likely due to the alien consumption, but that there is one star, in the center of all the known stars losing their energy, that remains constant with its output. In which case, the answer to the survival for Earth is likely found there, at Tau Ceti.
The world's best scientific minds come together (by force and coercion) to create a ship that can get to Tau Ceti in twelve years (using the alien microbe as fuel) with shuttle pods to bring back answers to how to save the planet, but for the crew, it's a one-way trip.
Knowing why he's there is only the first puzzle for Grace. Now he has to figure out how to save Earth. There's a very small window of time for him to discover the way to save the human race and get the answers sent back. Take too long and the shuttles will return to a dead planet.
This book is amazing.
Author Andy Weir brings us back to the magic that made The Martian so successful - an abandoned scientist trying to survive. But Ryland Grace's story is more complicated because he's not just trying to survive, but also help humanity survive.
There's lots and lots of science - which is part of Weir's writing signature - and there's also a really wonderful story.
It's hard for me to tell you just what I liked about this book because anything I write will be a spoiler and a huge part of the joy in this book is making the discoveries with Ryland Grace.
Grace is our main character, but through the liberal use of flashbacks, we have a full cast of characters - at least one quite important to the story. Everyone is unique and individual which makes it easy to read, but just as with The Martian, where Mark Watney's personality carries the story, Ryland Grace here is the smart-mouth, sometimes funny, obsessed scientist infusing his personal tastes into his discoveries. He's also quite smart - which is good since he will need his intellect to save all of humanity.
This is a page-turner. I did not want to put this book down. Neither did my 21 year old son who picked up my copy after I was well into it and finished it before I did. And days later he's still talking about how much he liked it and quoting sections of it to me at the dinner table.
I hope Ballantine Books will do a very large print run because this is going to be huge seller and you definitely don't want to miss out on the biggest thing to come out in 2021.
Looking for a good book? Project Hail Mary by Andy Weir is proof that lightning strikes twice as this has all the excitement and energy of Weir's debut novel, with a more complicated storyline that will hold the reader all the way to the end.
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Reviewed in the United States on May 10, 2021
★★★★★ 4
Excellent Hard Sci-Fi… Until the Politics Pull You Out
Format: Kindle
I was really excited to dive into Project Hail Mary. As a longtime Isaac Asimov fan, I’ve been craving fresh, modern hard science fiction that actually respects the science. This book delivered — at least for a while.
The author injects real science into the story in a way that’s both fun and fantastic. You don’t need to be an engineer to follow it; a solid high-school education is plenty. The concepts stretch your imagination without ever feeling impossible, and for the first chunk of the book I was hooked. I genuinely thought I’d found a new favorite author.
Then the jarring interruptions started.
Out of nowhere you get yanked out of the immersive sci-fi world by modern political pandering that feels completely unnecessary. A random parenthetical about Columbus “discovering an already inhabited world” when comparing something to the New World. Casual pronoun lectures. Characters selected or described by race and identity in ways that scream “check the boxes.” These moments don’t serve the story — they feel injected. Once you notice the author’s leanings, it becomes hard to unsee.
Each time it happens, the fantasy evaporates. It takes several chapters to sink back into the story… only for the next micro-lecture to pull you right back out.
Overall, I loved the writing, the hard science, and the imagination. It’s some of the best sci-fi I’ve read in years. I just wish the author had trusted the story instead of sneaking in real-world politics. It’s like eating the best meal of your life… and then finding a hair or two in it.
Strongly recommended for the sci-fi, with the above caveat.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
AMAZING debut novel!!!
Format: Kindle
Plot ⭐️⭐️⭐️⭐️
Spice 🌶️🌶️.5
Romance 💘💘💘
Vibes ⭐️⭐️⭐️⭐️⭐️
Dual 1st person POV - Ara (26) & Rogue (39 - but looks mid-20s: they can live hundreds of years so this isn't that large of a gap as it could've been which I heavily appreciate lol)
Tropes: enemies to lovers, fae/human wars (deep hatred for each other), shifters (dragons- MMC can only partial shift with wings), one horse, one bed, touch her and d!e, found family, abduction turned to freedom
The Last Storm is the debut novel from JD Linton and let me tell you, you guys NEED to read this. The plot was engaging and the editing was was amazing (especially for a debut novel). Our FMC, Ara, is stuck in her gilded cage longing for a life outside of her small town. She uses her books to escape and live vicariously through the pages (honestly, relatable). After her father announces her betrothal to her childhood friend (to whom she has no romantic feelings for), Ara tumbles unknowingly into a desperate plot trying to stop the humans from slaughtering the Fae.
As one can expect from an enemies to lovers / kidnapper/captive romance, Ara fights her attraction and lust towards our MMC, Rogue (the King of the Fae), for as long as she can. Upon seeing Ara for the first time, Rogue is instantly aware that she is his fated mate (not a spoiler). Since she is the General's only daughter, he plans to abduct her and use her as leverage to stop the brutality. During Ara's time in Rogue's captivity, their banter and chemistry continue to rise until they finally boil over and come together (quite literally, and many times I may add 😉).
Here's what I LOVED:
- Rogue continuously seeks advice from his elders and deeply respects their opinions and life experience and tries to implement their recommendations
- Rogue makes many mistakes in the beginning but we see him actively work on not repeating them as the book progresses. The level of self-awareness and his ability to change his behavior was impressive
- The magic system is intricate and we have only scraped the surface. As the series continues and Ara progresses in her powers, I'm sure we'll get to see more of this. I absolutely LOVE the messaging system that is used in this book.
- Ara's struggles are so human and so raw. She is experiencing so much guilt and pain and hurt and getting to see her work through each of these emotions is inspiring. Especially as her and Rogue get closer and she learns she can lean on him as well, that she is not alone.
- While this is the start of a series, there is NO cliffhanger! There's a bit of a teaser of something major that is going to happen at the start of the next book, but it's not a cliffhanger in the sense that we aren't sure if someone is going to live or d!e or if they'll be separated. For that, I am very thankful! This book was so much fun that I will definitely be returning to book 2, even if it takes several months (or longer since this is an debut author) to publish!
- Lastly, the cover is GORGEOUS! And I love the title!
I'll copy a few of my favorite quotes below so you can have a little taste of the author's writing and the world she's cultivated. 😊
Top Highlights from The Last Storm
On days like this, when my heart was heavy and my mind clouded, I resorted to books— to escape, to forget, to find freedom where I had none.
If I were to marry him, my face would always be turned to the window, searching for more, and if not that, I would be a shell of the person I am now.
I stepped back to admire her, thr0bbing at the sight. She was the most beautiful woman I had ever seen. To ever exist. Nothing, no one, had ever deserved to be worshiped more. All men should be made to kneel before her. But she would have to settle for me.
The taste of her met my t0ngue as my scent merged with hers, forever branding her. Mine. I l!cked the wound. Hers. Completely and utterly hers.
I didn’t claim her in ownership. I claimed her as my one. Devoted myself to one. With that mark, my body and soul were bound to her. I would never be with anyone else, emotionally or physically. It would be her or no one, until my last breath.
“Scream my name. Let everyone know who I belong to.”
I had never really cared about the weather before, but now, clear skies meant everything to me, and I was grateful to see another calm morning.
“There will never be another woman for me.” He paused. “Ever.” I stilled at his words. “What… Why?” “This”— his thumb slid down across the mark—“ is a symbol of… surrender. I know you believe that it was my claim upon you, but it wasn’t. It never was. I bound my body and soul to you, little storm.”
“I also know that it is more than this tiny, insignificant mark on your skin that binds me to you. It’s you. All of you. Your strength and resilience. Your determination to endure no matter what fate throws at you. Your love for love and stories and hope. You are entirely the opposite of everything that I am and I would gladly wear your shackles if it meant I could have you.”
My mate. Mine. And then everything shifted and I understood. I understood everything. The surrender. The deep, soul-craving longing. Bound. I was bound to him. Body and soul. Entirely his. “I would’ve waited forever,” he whispered back, understanding.
Seriously, everyone.. add this to your TBR!!
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Reviewed in the United States on November 14, 2022
★★★★★ 4
A Decent Fae Romance
Format: Kindle
** 3.5 Stars rounded up to 4 **
First off I want to say that I found the author, J. D. Linton, on TikTok right before the release of the sequel. I bought the first 2 books to support her release, so congrats to her for the release of the sequel!
Overall, I liked the story & plot, I liked the characters, and I liked the spice. The downfalls: not enough development between the characters for the romance, and it leaned a little heavy into the tropes. A lot of stuff is told to you, which could have been used as devices to drive the plot and emotions of the characters.
🛑🛑 Mild Spoilers ahead, I tried to hide the obvious ones 🛑🛑
This is very obviously a fated mates, which is a trope I usually really enjoy. But I wish the relationship between Ara & Rogue had much more development before it's realized that they're mates, instead of Rogue knowing almost immediately and using it for nefarious purposes (at least in the beginning before they get to know each other). By revealing this within the first quarter of the book, I feel like it leaves less room for them to fall for each other organically (albeit with help from the mating bond) and they love each other because of the mating bond. I was disappointed as soon as Rogue know (literally only 5% in) and I literally made a note: "As much as II love a good mating trope, I wish we had to work for it a little more. Where's the fun in just telling us?" I believe that by holding out and feeding the reader snippets of a potential bond, it would've been more rewarding as a reader.
I also wish there was more world building - we are told of a war between human & fae but don't get to really experience any of it. Ara is sheltered in her human home, then sheltered in Rogue's castle. There's bits and pieces about what the war has done on either side - but we're more told of the aftermath and don't really experience any of it. Ara's father is supposed to be the king's #1 general - yet he is at home with his family & with Ara for the first couple chapters. Her, her family, nor her village seem to be affected by the 10 year war going on on their borders. I wish there was a little more setup to make this conflict - an actual war - feel more than a skirmish between fighting territories.
Linton could also be a little repetitive - with the biggest culprit being when Ara is upset she "brings [her] knees to [her] chest]" and either sits like that or cries. Every time she is upset this phrase is mentioned. I would get it if this was her crutch, or how she copes with grief and stress, but that should be explained why she does it so often or it becomes repetitive. I started to get annoyed with how often she would sit like this solely because it happens every couple chapters.
However, I did really like the spice. I love an enemies to lovers trope, especially when it results in spicy scenes. The spicy scenes weren't anything new, but they were fun. Wish there were more but that could also just be me - there is no such thing as too much spice 😂
Would I read again? Probably not, I'm super picky with rereads. Although I did genuinely enjoy my first read through!
Will I continue the series? Probably, at least for the sequel. As for #3, kind of depends on where I am with my TBR once that is released
All in all an enjoyable, fast paced read
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Reviewed in the United States on March 8, 2024
★★★★★ 3
I love indie authors
Format: Kindle
Let me preface this by saying—writing a book is HARD! Coming up with characters so real that they take on a life of their own, building an entire world, the political/magic system. Designing all of this is no easy feat.
That being said.
This book had so. Much. Potential. I was so excited to read this book, and I plan to finish it for the sake of finishing it. But. At this point, I would have set I’d aside as a DNF. The book could have benefited from some form of a developmental editor, or an in depth beta reader. I will say this. Within 5 chapters, there are so many… phrases that I’ve highlight that I’ve latched onto. Phrases about books and storms that were written BEAUTIFULLY! So, bravo Linton for hitting the nail on the head as to why readers disappear like they do!
However, 5 chapters in and I can already guess where a majority of the story is going. But that’s also because I read like a mad-woman and have read this particular type of story, many different ways. Enemies to lovers where the FMC isn’t who she thinks she is. I am all about supporting indie authors. BUT. I also feel like criticism should be constructive, and not degrading. So if I could give this book a 4 1/2, strictly because I know the work the author put into this, I would. So if you’re looking for an easy read with characters that aren’t hard to follow, look no further! They are easy to love and easy to care for. One of the biggest issues they lacked, to me, was depth and plausible reactions to their situations. JD, you have done BEAUTIFULLY writing this book. I applaud and will continue to buy your books in the future. My BIGGEST recommendation is to definitely hire some form of an editor for any upcoming books. Or in turn, I will be happy to beta read for you. Should my opinion change of the book by the time I finish, I will happily get on here and say I was wrong, delete this review and post a different one. Until then…
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Reviewed in the United States on November 20, 2022