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Description
Thermostat Kit – Fits Mercury Verado V6/V8 175-300HP (Replaces 8M0162139, 8M0137816)Thermostat Kit Fits Mercury Verado V6 V8 175 300HP (Replaces 8M0162139, 8M0137816) This thermostat kit is designed for Mercury Mariner Verado 175 300HP V6 3. 4L & V8 4. 6L 4 Stroke engines from 2018 and newer (serial number 2B529482 and above). It is a direct replacement for Mercury OEM part numbers 8M0137816 and 8M0162139. Engineered for direct fit installation, matching OEM specifications. Features a corrosion resistant stainless steel housing for
Thermostat Kit – Fits Mercury Verado V6/V8 175-300HP (Replaces 8M0162139, 8M0137816)
This thermostat kit is designed for Mercury/Mariner Verado 175-300HP V6 3.4L & V8 4.6L 4-Stroke engines from 2018 and newer (serial number 2B529482 and above).
It is a direct replacement for Mercury OEM part numbers 8M0137816 and 8M0162139.
- Engineered for direct-fit installation, matching OEM specifications.
- Features a corrosion-resistant stainless steel housing for durability in marine environments.
- Designed with a self-cleaning mechanism that allows contaminants to be flushed from closing surfaces.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number | Superseded By |
|---|---|---|
| Mercury | 8M0137816 | 8M0162139 |
| Mercury | 8M0162139 |
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 3.4L V6 | 175 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 3.4L V6 Pro XS | 175 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 3.4L V6 | 200 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 3.4L V6 SeaPro | 200 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 4.6L V8 Pro XS | 200 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | APEX | 200 | 4-Stroke | 2023–Present | 8M0162139 | S/N: 1E054353 and above |
| Mercury | Verado 3.4L V6 | 225 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 4.6L V8 Pro XS | 225 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 4.6L V8 SeaPro | 225 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 4.6L V8 | 250 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 4.6L V8 Pro XS | 250 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 4.6L V8 SeaPro | 250 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 4.6L V8 Verado | 250 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | 4.6L V8 Racing | 250R | 4-Stroke | 2021–Present | 8M0162139 | S/N: 1E080500 and above |
| Mercury | Verado 4.6L V8 | 300 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 4.6L V8 Pro XS | 300 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 4.6L V8 SeaPro | 300 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 4.6L V8 Verado | 300 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | Verado 4.6L V8 Verado SeaPro | 300 | 4-Stroke | 2018–Present | 8M0162139 | S/N: 2B529482 and above |
| Mercury | 4.6L V8 Racing | 300R | 4-Stroke | 2021–Present | 8M0162139 | S/N: 1E080500 and above |
| Mercury | 4.6L V8 AMS Racing | 300R | 4-Stroke | 2021–Present | 8M0162139 | S/N: 1E081459 and above |
| Mercury | APEX | 360 | 4-Stroke | 2023–Present | 8M0162139 | S/N: 1E054247 and above |
| Mercury | Racing | 450R | 4-Stroke | 2020–2023 | 8M0162139 | S/N: 1E083006-1E099720 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Thermostat |
| Installation | Direct replacement |
| Housing Material | Corrosion-resistant stainless steel |
| Temperature Rating | 140°F (60°C) |
| Other Technical Attributes | Self-cleaning design allows cooling system contaminants to flush through closing surfaces |
| Warranty | OEM factory warranty when purchased from authorized dealer |
Package Contents
- 1 x Thermostat (8M0162139)
Installation Guide
- Ensure the engine is cool and disconnect the battery. Place a container under the engine to catch draining coolant.
- Locate the thermostat housing on the engine block. It's typically where the main coolant hose from the radiator attaches.
- Carefully remove the bolts securing the housing. You may need to gently tap the housing to break the seal.
- Note the orientation of the old thermostat before removing it from the housing.
- Clean both the housing and the engine block mating surfaces thoroughly, removing all old gasket material.
- Install the new thermostat in the same orientation as the original.
- Re-secure the thermostat housing with a new gasket, if applicable, and tighten the bolts to the manufacturer's specified torque.
- Reconnect all hoses, refill the cooling system with the appropriate coolant, and reconnect the battery.
- Start the engine and let it warm up, checking carefully for any leaks around the thermostat housing. Top off the coolant as needed.
Troubleshooting & FAQ
Q: How do I confirm this thermostat fits my Verado engine?
A: This thermostat fits a wide range of Mercury Verado V6 and V8 engines (2018 and newer). The most reliable way to confirm fitment is to match your engine's serial number against the ranges listed in the compatibility table. For this part, your serial number should be 2B529482 or higher for most models.
Q: What are the signs of a failing thermostat?
A: Common symptoms include engine overheating (if stuck closed) or the engine taking too long to reach its proper operating temperature (if stuck open). An erratic temperature gauge reading can also indicate a problem.
Q: How often should I replace my engine's thermostat?
A: Thermostats don't have a fixed replacement schedule, but they are a critical component for engine health. Many mechanics recommend replacing them as a preventative measure every 300-500 hours or every few years, especially if you operate in saltwater.
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
4.6 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Give me a little bit’a that Nicolai Roman Attano ANY DAY. 🥵
⭐️ 5
🌶 3
🚂 Peaky Blinders Vibes
🚂 Enemies to Lovers
🚂 Sexy + Sassy Banter
🚂 Marriage for Business
🚂 Unique Magic System
🚂 Dual POV
I absolutely LOVED this book. The mafia/peaky blinders vibes — the lil’ steam punk feel mixed with magic and mayhem… add in the witty banter from Milla and Nico? ALEXIS, YOU DONE JUST ROCKED MY WORLD, FRIEND.
What I Enjoyed:
Nicolai. Roman. Attano.: Literally. This is all I’ve got to say to you, just read the book.
The Banter: When I tell you the banter between Milla and Nico is iconic — I mean it. Scroll down for some of my favorites, but my my my, my core was HEATING and I was wriggling in my seat on the airplane, my friends. OOOOOMPH.
Steampunk/ Peaky Blinders Vibes: I read this whole book with a feeling of mist on the ground, the flickering street lights, sound of a train horn, flapping of coat tails, and smell of cigarillo smoke. It was dark, broody, beautiful, and chilling. Add in a little wetness from morning dew and the scene has been set.
Plot Twists & Turns: The amount of times my eyes bugged out of my head with “OMG NO WAY”, “WHAAAT”, and “BOOIIIIIII–” should almost be illegal. I didn’t see the twist at the end coming, I loved it! Brilliant! I feel like House of Bane and Blood didn’t even allow me the opportunity to guess what would happen next, because I just had no idea where Alexis would take it.
Attano Family: I’m a sucker for a big family with many cousins, personalities, and a spicy Nonna. Throw in a kitchen scene or two and you’ve got me hooked. I loved the dynamic between the Attano family and how fast they came to bat for Milla. I throughly enjoyed getting to know the people behind Nicolai, and how they all support him and each other.
What I Didn’t Like:
The Minimal Insight on the Marchese Family: We aren’t really given much insight into the Marchese Family and Milla’s brothers. I understand this gives an ominous feel to the brothers — but I really wish we could have explored Giles and Milla’s relationship just a little bit more. I wish I understood more about the Twins than what was given. Although, I do understand the distance and the coldness, I personally just wanted a little more.
Over All Thoughts
The way I straight flew through this book — UGH. Adding Nico to my list of book boyfriends, and Alexis to my list of instant buy Authors. The way House of Bane and Blood is written is beautiful, it does not feel immature or overwhelming, there’s enough to keep you riveted and more and more unfolds with every chapter. Milla and Nico are a force to be reckoned with separately, but together? Indestructible! I cannot WAIT to see what happens in City of Mirth and Malice.
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Reviewed in the United States on July 9, 2024
★★★★★ 4
A Promising Start with a Complex Magic System
“House of Bane and Blood” delivers an engaging enemies-to-lovers romance wrapped in an arranged marriage trope, which was one of the strongest aspects of the book. The dynamic between Nico and Camilla was compelling, making their evolving relationship one of the highlights of the story. The plot itself was interesting and had a lot of potential.
However, the complexity of the magic system was a drawback. The abundance of difficult names and terms made it challenging to fully grasp the world-building, leaving some aspects feeling more confusing than immersive. At times, it was hard to keep track of what was happening and who was who.
Despite this, the book holds promise as the first installment of the series. With an intriguing setup and strong character chemistry, I’m excited to see where Book 2 takes the story. Hopefully, it will continue to build on its strengths while offering more clarity on its magical elements.
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Reviewed in the United States on March 17, 2025
★★★★★ 5
Outstanding Indie Fantasy! You NEED to read this!
I have started and deleted my intro to my review multiple times at this point. My mind is sufficiently BLOWN. This book has landed itself into my top favorite romantasies right alongside ACOTAR and FBAA. ITS SO DANG GOOD. I literally woke up, popped it open on my kindle app (Thanks author and R&R Book Tours for the arc!) and got to reading and just didn’t stop. I couldn’t stop. From the first dang page, Menard dragged my butt in and tied me down. I. Was. HOOKED.
Writing Style: I absolutely love the writer’s style! Told from mainly Milla’s POV, with the occasional glance into Nico’s POV when its important. Her world building is rich and immersive, sticking firmly into the steampunk/gas lamp fantasy atmosphere. Her magic system—while feeling familiar—still feels unique and blends beautifully with the world she’s created.
Characters: I can’t begin to describe how much I love the characters Menard has created for this story. Milla is a firestorm. She’s passionate, fiesty, loyal, and self confident. She doesn’t back down, no matter the odds. For me, personally, she’s ranking right up there with Feyre (ACOTAR), Poppy (FBAA), and Sera (FBAA prequel) as one of my favorite female leads. Despite her fierceness, she’s not invincible and she’s still vulnerable—which unveils itself more as the story goes on.
Nico, mmmmmmmm, Nico. He’s cocky, and strong. His heart is for his blood and family. There’s nothing he won’t do for those he cares for. He’s incredibly insightful which leads to a lot of me squeeing and highlighting his quotes. Pairing him up with Milla is a riot I will watch again and again.
The side characters are all phenomenal, ranging wide in personalities and giving the world a richer vibrancy. They compliment both main characters, bringing out the best and worst in them, helping to bring secrets to light and keep the plot going. Not a single character felt out of place, or ever out of character.
Relationship: Y’all know I love a good slow burn and this burns so good. The push and pull of their hate/love relationship is a thrill to witness. Watching them fall for each other is a joy and the spice (when we get there) is HAWT.
Plot: This story had me hooked, and that’s largely in thanks to how well planned out the story’s plot is. Menard did an excellent job, masterfully balancing her foreshadowing and reveals. While I halfway guessed the big reveal, i definitely did not expect the big reveal. (Read the book, then you’ll understand lmao). The pacing is fantastic. Nothing about the story felt rushed, not the relationship, not the reveals, not the over arching plot line. Just absolutely phenomenal.
Enjoyment: 100/10 will read again. I need a physical copy in my life. I HIGHLY recommend this book.
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Reviewed in the United States on October 28, 2023
★★★★★ 5
One of the best reading experiences I’ve ever had
Format: Audiobook
This was truly AMAZING!!!!!!!!!!!! In every possible way.
- the setting. I loved the steampunk/gaslamp setting with trains, overcast weather, and mafia vibes
- the magic. I still don’t entirely understand the magic system and descendants as much and it took awhile for me to get my footing in that department- and I am intrigued beyond measure, though it in no way lessened my enjoyment of the story. I just really wish I had a better grasp of it.
- the plot itself. Beautiful. The tropes were troping in the absolute best way. Every single thing that happened I was like YES MORE!!!
- the writing. I found myself grinning ear to ear uncontrollably during my entire read through and full on choking on my gasps, again, like the entire read through. And I read this too at times when I was in an awful mood so the way this book was an INSTANT pick me up really speaks to how well this was written. I was having the absolute best time, non stop.
- the characters. The best part oh my gosh. Camilla is SUCH a badass. Her and Nico are supposed to be low 20s and I gotta tell you they read more like 30s from how capable and mature they are (not that that age bracket is incapable or immature, just comparing them to other characters written in that age range). She is the type of cool as heck character that everyone would be cos-playing as and if it was a kid movie, every single girl would dress as her for Halloween. She’s that awesome.
Nico is top freaking tier. I gotta say his hairstyle is my undoing and with the addition of the metal arm- before I even started reading the book I was in love with him. And he was EVEN BETTER than my lofty expectations. This man. Perfect in every single way. Every. Single. Way. If I start now I won’t stop so I’m just gonna leave it at that. Camilla and Nico are power couple of the century though and the way they interacted was the most toe-curling/squealing/kicking your feet banter I’ve read in a while. PLUS the way they fell for each other was a gem. I was falling in love with their relationship right along with them.
- a shout out to the side characters too. Aramis, Gideon, Aunt Fran, Esme, Luther, Adler [honestly just insert all the supporting cast they were freaking phenomenal] brought so much life and personality to the story and helped round out Nico and Camilla. I really really really would absolutely adore if Adler got some more spotlight time in the future because he and Aramis are up there with “let’s give these side characters their own spinoffs”.
Also, the villains were great too. I love a great villain in a story and sometimes I don’t think they get highlighted as much in books as in movies or TV that I hear of.
If it wasn’t obvious already- this was even greater than a 5 star read. This was perfection- in quality and in vibes- and it was one of the most enjoyable reading experiences I have ever had and I’m not throwing that around lightly. I have scenes from this book playing in my mind unbidden on repeat and I know this world has so much more to be explored. I will read anything Alexis L Menard puts out in the future
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Reviewed in the United States on March 5, 2025
★★★★★ 4
Great mix of maffia and magic
Format: Kindle
This one felt really unique to me, with a great and successful blend of Twenties-feeling maffia and inventive magic. I liked both the main characters a lot, even though I found myself almost shouting at the MFC sometimes. She really should learn not to trust everyone just because they're family!
All in all a good read, with lots of romance, yearning and some spice as well.
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Reviewed in the United States on November 15, 2025
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