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Description
Thermostat Housing Kit – Fits Mercury/Mariner Verado 135-400 HP (Replaces 892864T04, 8M0174561)Thermostat Housing Kit Fits Mercury Mariner Verado 135 400 HP This thermostat housing kit is a direct fit replacement for Mercury and Mariner Verado four stroke outboard engines from 135 HP to 400 HP (2004present). It is engineered to ensure your engine maintains its optimal operating temperature by precisely regulating coolant flow for peak performance and longevity. This assembly directly replaces Mercury part numbers 892864T04 and 8M0174561, along
Thermostat Housing Kit – Fits Mercury/Mariner Verado 135-400 HP
This thermostat housing kit is a direct-fit replacement for Mercury and Mariner Verado four-stroke outboard engines from 135 HP to 400 HP (2004–present). It is engineered to ensure your engine maintains its optimal operating temperature by precisely regulating coolant flow for peak performance and longevity.
This assembly directly replaces Mercury part numbers 892864T04 and 8M0174561, along with Sierra aftermarket parts 18-3631 and 18-3631-K.
- Includes a pre-seated thermostat for simplified installation.
- Designed as a direct OEM-spec replacement for a perfect fit.
- Comes with the required O-ring seal for a leak-free installation.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number | Superseded By |
|---|---|---|
| Mercury | 892864T04 | 8M0174561 |
| Sierra | 18-3631 | 18-3631-K |
| JLM Marine | 18-3631 |
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 | Verado L4 | 135 | 4-Stroke | 2004–Present | 892864T04/8M0174561 | 4-cylinder models (1B227000-2B576734) |
| Mercury | Verado L4 | 150 | 4-Stroke | 2004–Present | 892864T04/8M0174561 | 4-cylinder models (1B227000-2B576734) |
| Mercury | Verado L4 | 175 | 4-Stroke | 2004–Present | 892864T04/8M0174561 | 4-cylinder models (1B227000-2B576734) |
| Mercury | Verado L4 | 200 | 4-Stroke | 2004–Present | 892864T04/8M0174561 | 4-cylinder models (1B517159-2B576734) |
| Mercury | Verado L6 | 200 | 4-Stroke | 2004–Present | 892864T04/8M0174561 | 6-cylinder models (0T980000-2B578935) |
| Mercury | Verado L6 Pro | 200 | 4-Stroke | 2004–Present | 892864T04/8M0174561 | Pro 6-cylinder models (2B034840-2B577715) |
| Mercury | Verado L6 | 225 | 4-Stroke | 2004–Present | 892864T04/8M0174561 | 6-cylinder models (0T980000-2B578935) |
| Mercury | Verado L6 | 250 | 4-Stroke | 2004–Present | 892864T04/8M0174561 | 6-cylinder models (0T980000-2B578935) |
| Mercury | Verado L6 Pro | 250 | 4-Stroke | 2004–Present | 892864T04/8M0174561 | Pro 6-cylinder models (1B830170-2B577715) |
| Mercury | Verado L6 | 275 | 4-Stroke | 2004–Present | 892864T04/8M0174561 | 6-cylinder models (0T980000-2B578935) |
| Mercury | Verado L6 | 300 | 4-Stroke | 2004–Present | 892864T04/8M0174561 | 6-cylinder models (1B517434-2B578935) |
| Mercury | Verado L6 Pro | 300 | 4-Stroke | 2004–Present | 892864T04/8M0174561 | Pro 6-cylinder models (1B830170-2B577715) |
| Mercury | Verado L6 Pro | 350 | 4-Stroke | 2015–Present | 892864T04/8M0174561 | 2.6L L6 Pro models (2B141124-3B342962) |
| Mercury | Verado L6 | 350 | 4-Stroke | 2015–Present | 892864T04/8M0174561 | 2.6L L6 models (2B141617-3B342962) |
| Mercury | Verado L6 | 400 | 4-Stroke | 2016–Present | 892864T04/8M0174561 | 2.6L L6 models (2B618256-3B342962) |
| Mercury | Racing L6 | 400R | 4-Stroke | 2015–Present | 892864T04/8M0174561 | 2.6L L6 Racing models (2B141124-3B342962) |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Thermostat Housing Assembly |
| Installation | Direct OEM Replacement |
| Connection | Hose connection with clamp |
| Housing Material | Metal Alloy (Aftermarket) |
| Operating Temperature | 140°F (60°C) nominal opening temperature |
| Warranty | 1-year manufacturer warranty |
| Other Attributes | Includes thermostat pre-seated in housing, O-ring seal required for installation |
Package Contents
- 1 x Thermostat with Housing Assembly (Replaces 892864T04/8M0174561)
- 1 x O-Ring Seal (Replaces 8M005958)
- 1 x Clamp (Note: Included with some kits, but may require separate purchase)
Installation Guide
- Ensure the engine is completely cool and disconnect the battery.
- Drain the engine coolant into a suitable container by opening the drain plug.
- Locate the thermostat housing and carefully disconnect the attached coolant hoses.
- Unbolt and remove the old thermostat housing assembly. Note the orientation.
- Thoroughly clean the mounting surface on the engine block, removing all old gasket or sealant material.
- Place the new O-ring seal into its groove on the new housing.
- Install the new thermostat housing assembly, ensuring it is correctly seated.
- Tighten the mounting bolts to the manufacturer's recommended torque specification.
- Reconnect the coolant hoses and secure them with the clamps.
- Close the drain plug and refill the cooling system with the appropriate coolant mixture.
- Reconnect the battery, start the engine, and let it run for several minutes while checking for any leaks around the housing or hoses.
Troubleshooting & FAQ
Q: How do I confirm this thermostat kit fits my engine?
A: This kit fits a wide range of Mercury Verado L4 and L6 engines from 135 to 400 HP. The best way to confirm is to check your engine's model and serial number against the ranges listed in our "Compatible Engine Models" table above. Cross-referencing your old part number is also a reliable method.
Q: What is the difference between this aftermarket housing and the OEM version?
A: Original Mercury (OEM) housings are typically made from a composite material. Our aftermarket version is constructed from a durable metal alloy for enhanced longevity while maintaining the exact OEM specifications for fit and function.
Q: What are common signs that my thermostat housing is failing?
A: The most common symptoms include the engine overheating (running too hot) or taking too long to reach its normal operating temperature (running too cold). You may also notice visible coolant leaks from cracks in the old housing.
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
4.7 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 5
my new favorite book
Format: Kindle
Ok so I never write reviews but this book was so good I felt the need to write this. Firstly your introduced to Huntyr you see her closed off hard core badass than towards the end you see the most subtle change and growth it’s amazing and the enemies to friends to lovers was just perfect, AND THE TWIST AT THE END GOT ME GOOD! You see one spicy scene the whole book but it doesn’t even MATTER BECAUSE THE BOOK WAS THAT GOOD. I’ve read 85 books in 2023-2024 so far and I’m pround to say this is my all time favorite. I’m so excited to read more of Emily Blackwoods books, this was my first time reading one of hers and I’m glad I did because HOLY!! Well done Emily well done
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Reviewed in the United States on February 23, 2024
★★★★★ 4
Fast paced romantasy you will not want to put down!
Format: Kindle
4.25 stars! I LOVED this book with similar vibes to Hush Hush, Fourth Wing, and The Serpent and the Wings of Night! It was fast paced with easy world building and will keep you turning the pages late into the night because you will not want to put it down!
Huntyr is a fierce bad@ss FMC trained to kill vampyres her entire life. She is sent on a mission to go to the academy and earn her spot into The Golden City. Upon arrival, she is forced to room with the delicious fallen angel, Wolf, who is the only one who knows about her assassin identity. The romance, the plot twists, the secrets revealed, the battles, and the tantalizing training scenes had me hooked! And that ending…. I’m holding my breath in need to know hell!
Read if you love:
🪽 Fae, Vampyres, Fallen Angels
🪽 Academy setting with magical trials
🪽 Forced proximity and slow burn
🪽 Rivals to lovers
🪽 Hidden identities and secrets
🪽 Tend your wounds
“𝘖𝘧 𝘤𝘰𝘶𝘳𝘴𝘦 𝘐 𝘸𝘢𝘴 𝘸𝘢𝘵𝘤𝘩𝘪𝘯𝘨 𝘺𝘰𝘶. 𝘐 𝘤𝘰𝘶𝘭𝘥𝘯’𝘵 𝘭𝘰𝘰𝘬 𝘢𝘸𝘢𝘺 𝘧𝘰𝘳 𝘢 𝘮𝘰𝘮𝘦𝘯𝘵, 𝘦𝘷𝘦𝘯 𝘪𝘧 𝘐 𝘵𝘳𝘪𝘦𝘥.”
“𝘐𝘧 𝘺𝘰𝘶 𝘸𝘢𝘯𝘵 𝘮𝘦 𝘰𝘯 𝘮𝘺 𝘬𝘯𝘦𝘦𝘴, 𝘏𝘶𝘯𝘵𝘳𝘦𝘴𝘴, 𝘢𝘭𝘭 𝘺𝘰𝘶 𝘩𝘢𝘷𝘦 𝘵𝘰 𝘥𝘰 𝘪𝘴 𝘢𝘴𝘬.”
“𝘠𝘰𝘶 𝘥𝘰 𝘯𝘰𝘵 𝘬𝘯𝘰𝘸 𝘵𝘩𝘦 𝘷𝘪𝘰𝘭𝘦𝘯𝘤𝘦 𝘵𝘩𝘢𝘵 𝘳𝘶𝘯𝘴 𝘵𝘩𝘳𝘰𝘶𝘨𝘩 𝘮𝘺 𝘷𝘦𝘪𝘯𝘴, 𝘣𝘦𝘨𝘨𝘪𝘯𝘨 𝘮𝘦 𝘵𝘰 𝘰𝘣𝘭𝘪𝘵𝘦𝘳𝘢𝘵𝘦 𝘢𝘯𝘺𝘰𝘯𝘦 𝘸𝘩𝘰 𝘭𝘢𝘺𝘴 𝘢 𝘩𝘢𝘯𝘥 𝘰𝘯 𝘺𝘰𝘶.”
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Reviewed in the United States on June 12, 2024
★★★★★ 5
Excellent Rivals to Lovers!!
Format: Kindle
The tension and banter between Huntyr and Wold was delectable. I absolutely love the fallen angel and all of his flaws. Huntyr is amazing too being a badass FMC with some major trauma. The world building was great and I enjoyed the training aspect of the story. The writing was immersive and was in the story the whole time. The ending had quite a twist that I hadn’t anticipated and made my jaw DROP. Excellent job! I also loved the narration. Laura is one of my fave narrators!
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Reviewed in the United States on August 15, 2025
★★★★★ 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