SKU: 49556996561

Thermostat (60°C/140°F) – Fits Suzuki 70-300 HP & Yamaha 75-250 HP 4-Stroke Outboards (Replaces 17670-90J00, 67F-12411-01-00)

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Description

Thermostat (60°C/140°F) – Fits Suzuki 70-300 HP & Yamaha 75-250 HP 4-Stroke Outboards (Replaces 17670-90J00, 67F-12411-01-00)Thermostat (60C 140F) Fits Suzuki, Yamaha, Johnson Evinrude & Mercury 4 Stroke Outboards This engine thermostat is designed for a wide range of 4 stroke outboard motors, including models from Suzuki, Yamaha, Johnson Evinrude, and Mercury Mariner. It regulates the engine's operating temperature by opening at 60C (140F) to allow coolant to circulate, preventing overheating and ensuring optimal performance. This component is a direct replacement for

Thermostat (60°C/140°F) – Fits Suzuki, Yamaha, Johnson/Evinrude & Mercury 4-Stroke Outboards

This engine thermostat is designed for a wide range of 4-stroke outboard motors, including models from Suzuki, Yamaha, Johnson/Evinrude, and Mercury/Mariner. It regulates the engine's operating temperature by opening at 60°C (140°F) to allow coolant to circulate, preventing overheating and ensuring optimal performance.

This component is a direct replacement for Suzuki part numbers 17670-90J00 / 17670-90J01, Yamaha 67F-12411-01-00 / 67F-12411-00-00, Mercury 8556761 / 5033721, and Sierra 18-3632.

  • Operating Temperature: 60°C (140°F)
  • Installation: Direct replacement for OEM parts
  • Engine Type: Compatible with 4-Stroke outboard engines

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number Notes
Suzuki 17670-90J00
Suzuki 17670-90J01
Yamaha 67F-12411-00-00 Superseded by 67F-12411-01-00
Yamaha 67F-12411-01-00
Yamaha 6CB-12411-00-00
Mercury/Mariner 8556761
Mercury/Mariner 5033721
Sierra 18-3632 Aftermarket Replacement

Compatible Engine Models

Confirm your engine model/year in the table below. For Suzuki owners, You can review exploded diagrams here to verify part numbers: Suzuki Parts Diagrams & Catalog.

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.

Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson Serial Number Guide.

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.

Suzuki Models

Brand Model Rated HP Stroke Years OEM Part No.
Suzuki DF70 70 4-Stroke 2009–Current 17670-90J00/17670-90J01
Suzuki DF80 80 4-Stroke 2009–Current 17670-90J00/17670-90J01
Suzuki DF90 90 4-Stroke 2001–Current 17670-90J00/17670-90J01
Suzuki DF100 100 4-Stroke 2009–2010 17670-90J00/17670-90J01
Suzuki DF115 115 4-Stroke 2001–2010 17670-90J00/17670-90J01
Suzuki DF140 140 4-Stroke 2002–2010 17670-90J00/17670-90J01
Suzuki DF150 150 4-Stroke 2006–2010 17670-90J00/17670-90J01
Suzuki DF175 175 4-Stroke 2006–2010 17670-90J00/17670-90J01
Suzuki DF200 200 4-Stroke 2004–2010 17670-90J00/17670-90J01
Suzuki DF225 225 4-Stroke 2004–2010 17670-90J00/17670-90J01
Suzuki DF250 250 4-Stroke 2004–2010 17670-90J00/17670-90J01
Suzuki DF300 300 4-Stroke 2007–2010 17670-90J00/17670-90J01

Yamaha Models

Brand Model Rated HP Stroke Years OEM Part No. Notes
Yamaha F75/F75A 75 4-Stroke 2003–2017 67F-12411-01-00 Supersedes 67F-12411-00-00
Yamaha F80 80 4-Stroke 2001–2003 67F-12411-01-00
Yamaha F90/F90A 90 4-Stroke 2003–2017 67F-12411-01-00
Yamaha F100 100 4-Stroke 2001–2003 67F-12411-01-00
Yamaha F150 150 4-Stroke 2004–Current 67F-12411-01-00 Multiple model variants including F150A/F150B
Yamaha F200 200 4-Stroke 2002–Current 67F-12411-01-00 Both inline and V6 variants
Yamaha F225 225 4-Stroke 2002–Current 67F-12411-01-00
Yamaha F250 250 4-Stroke 2005–Current 67F-12411-01-00
Yamaha VF200 200 4-Stroke 2009–2011 67F-12411-01-00 SHO Series
Yamaha VF225 225 4-Stroke 2009–2011 67F-12411-01-00 SHO Series
Yamaha VF250 250 4-Stroke 2009–2011 67F-12411-01-00 SHO Series
Yamaha LF150 150 4-Stroke 2004–Current 67F-12411-01-00 Left-hand rotation variant
Yamaha LF200 200 4-Stroke 2002–Current 67F-12411-01-00 Left-hand rotation variant
Yamaha LF225 225 4-Stroke 2002–Current 67F-12411-01-00 Left-hand rotation variant
Yamaha LF250 250 4-Stroke 2002–Current 67F-12411-01-00 Left-hand rotation variant

Johnson/Evinrude Models

Brand Model Rated HP Stroke Years
Johnson/Evinrude BJ90 90 4-Stroke 2003–2006
Johnson/Evinrude BJ115 115 4-Stroke 2003–2006
Johnson/Evinrude BJ140 140 4-Stroke 2004–2006
Johnson/Evinrude BJ200 200 4-Stroke 2005–2006
Johnson/Evinrude BJ225 225 4-Stroke 2005–2006
Johnson/Evinrude J90 90 4-Stroke 2003–2006
Johnson/Evinrude J115 115 4-Stroke 2003–2006
Johnson/Evinrude J140 140 4-Stroke 2004–2006
Johnson/Evinrude J200 200 4-Stroke 2004–2005
Johnson/Evinrude J225 225 4-Stroke 2004–2005

Mercury/Mariner Models

Brand Model Rated HP Stroke Years OEM Part No.
Mercury/Mariner 75HP Carb 75 4-Stroke Serial 0G960500–1B226999 8556761/5033721
Mercury/Mariner 75HP EFI 75 4-Stroke Serial 0G1B172291–1B366822 8556761/5033721
Mercury/Mariner 80HP EFI 80 4-Stroke Serial 1B227000–1B366822 8556761/5033721
Mercury/Mariner 90HP Carb 90 4-Stroke Serial 0G960500 & Up 8556761/5033721
Mercury/Mariner 90HP EFI 90 4-Stroke Serial 1B172291–1B366822 8556761/5033721
Mercury/Mariner 100HP EFI 100 4-Stroke Serial 1B227000–1B366822 8556761/5033721
Mercury/Mariner 225HP EFI 225 4-Stroke Serial 0T653945 & Up 8556761/5033721

Technical Specifications

Specification Value
Product Type Engine Thermostat
Installation Direct OEM replacement
Temperature Rating 60°C (140°F)
Engine Compatibility 4-Stroke outboard engines
Housing Color Silver/Metallic
Weight 0.11 kg (0.25 lbs)
Connection Direct mount to thermostat housing
Operating Temperature 60°C (140°F) opening temperature
Other Technical Attributes Essential cooling system component that regulates engine operating temperature

Package Contents

  • 1 x Thermostat (Replaces 17670-90J00, 67F-12411-01-00, 8556761)

Installation Guide

  1. Safety First: Ensure the engine is completely cool and turned off. Disconnect the battery.
  2. Locate Housing: Find the thermostat housing on the engine block. It is typically a small dome-shaped cover where the main coolant hoses connect.
  3. Drain Coolant: Place a drain pan under the housing and partially drain the coolant to a level below the thermostat.
  4. Remove Housing Cover: Loosen and remove the bolts holding the thermostat housing cover in place.
  5. Remove Old Thermostat: Carefully lift out the old thermostat and its gasket or seal. Note its orientation.
  6. Clean Surfaces: Thoroughly clean the mounting surfaces of the housing and cover, removing any old gasket material or corrosion.
  7. Install New Thermostat: Place the new thermostat into the housing in the correct orientation. Ensure the new seal or gasket is properly seated.
  8. Re-attach Cover: Secure the thermostat housing cover and tighten the bolts to the manufacturer's specified torque.
  9. Refill Coolant: Refill the cooling system with the appropriate coolant.
  10. Check for Leaks: Reconnect the battery. Start the engine and let it warm up, checking carefully for any leaks around the housing.
  11. Verify Operation: Monitor the engine temperature gauge to ensure it warms up to and maintains the correct operating temperature.

Troubleshooting & FAQ

Q: How do I confirm this thermostat fits my engine?

A: The best way is to compare your original part number to those listed in our cross-reference table. You can also review the detailed compatibility tables for your engine brand, model, and year. For specific brand guidance, use the serial number look-up links provided in the "Compatible Engine Models" section.

Q: What are the signs of a failing thermostat?

A: A thermostat can fail in two ways: stuck open or stuck closed. If it's stuck open, your engine may take a very long time to warm up or never reach its ideal operating temperature, leading to poor performance and fuel economy. If it's stuck closed, the engine will overheat quickly, which can cause severe damage. Consistently high or low readings on your temperature gauge are key indicators.

Q: What temperature does this thermostat open at?

A: This thermostat is designed to begin opening at 60°C (140°F), helping your engine maintain a stable and efficient operating temperature.

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:
  1. 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
SKU: 49556996561

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4.7 ★★★★★
Based on 16 reviews
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Verified Purchase
Nicole Gassman
Grantham, US
★★★★★ 4
Cool world building and great side characters
Format: Kindle
I adored the side characters and found them a lot more compelling than Jovie and Acker, if I’m being honest. I really wanted to like her but I found myself getting frustrated by her lack of, I don’t know, real rage for any of the crap people pull on her. Like ok I get this is romantasy but I have a hard time really believing you’re actually as upset at this guy as you claim to be when two minutes later you’re letting this dude shove his tongue down your throat. Additionally, an early running theme is that Jovie is frustrated that there are a bunch of people deciding things for her but the existence of the whole “matched/bond” thing makes much of her autonomy a moot point. Like at one point I think Acker even points out that them getting into bed together is a “foregone conclusion” and someone else mentions that the other matched pairs that don’t end up together ended up literally destroying each other. No pressure. I was a lot more interested in the characterization of Messer, Beau, and Hallis. I knew I was going to be exasperated consistently by this girl when she let Mr. Murder Hottie treat Messer like a war criminal after he almost got himself spatchcocked for them by a mighty-morphing radical with an attitude problem. If my homie went through the battle blender like that for me after I found out he had been secretly protecting me and keeping me company for weeks/months, I would be doing A LOT MORE than standing around trying to figure out if I actually thought he was my friend while Captain Boy Toy did some light torture on him. Also Acker, my dude, if you can still find it in your heart and your loins to get riled up while your sister is having a breakdown in the room over…I don’t know, seek help I guess. I liked the juxtaposition of Beau’s bravado and her militaristic delivery of information to her brother showing she can turn on a dime when needed. Adding the mental toll her gift takes on her throughout time and how she has self destructive coping mechanisms really gave her some cool depth, and I appreciated the vulnerability it lent her. Hallis was a weird character for me at first but I ended up looking forward to his dialogue a lot. Initially, I didn’t care for the way he seemed to immediately just be a real jerk to Jovie and it didn’t often read as playful to me when I think it sometimes meant to. Regardless, his genuine care for Beau and Acker and how he dropped the act immediately when they really needed him made him pretty endearing and I always appreciate a grump who cares. Honestly everything about this book was an A+ for me aside from the two main characters’ dynamic. When Jovie gets pissed at those bats and obliterates a forest? A+ When she tells Acker that she saw the signs that Messer was getting abused and acknowledged she felt shame and that she couldn’t fault him for being complicit in her mistreatment since she had done the same? A+ When she’s sitting there and coming to terms with the fact that everything she knows has been built on lies as she’s flipping through her sketchbook? A++ The writing and setting is great and the book is good, but someone needs to give Jovie a big stick and tell her it’s okay to be mad and smack people with it even if they’re hot.
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Reviewed in the United States on February 19, 2025
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Dimps
West Palm Beach, US
★★★★★ 5
Mind blowing page turner
Oh my stars!!! 🤯 he falls first and he falls hard, enemies to lovers, fated mates. Every characters are lovable. There's action, magic, one horse 🤭 and a plot twist that keep on twisting. Oh and a bad ass FMC! Loved it!
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Reviewed in the United States on April 23, 2026
B
Verified Purchase
Bryan & Lanae Kirby
Port Orchard, US
★★★★★ 3
Interesting. Confusing ending that's too similar to another book
Ok, I had to process almost a whole 24 hours before I could write this review. And long story short, did I enjoy the book, yes. Does it have a lot of interesting and good parts to it? Also yes. But does it also have some major flaws? Absolutely. Now I'm not gonna break down every single little thing in this book. But here are the basics of what I liked, and what I didn't like. The good? I liked the characters. They intrigued me off the bad. The world building is pretty decent. It's a little confusing in the beginning, but information is slowly doled out, and some questions are answered. I found that there was a lot of little twists and turns that kept the story engaging. The magic system is intriguing. But, there are quite a few things off for me. First off, we have another story that has heavy inspirations from other books. There are a lot of aspects in this story that felt directly pulled from throne of glass. And the big twist at the end? Was almost verbatim the same ending as the book how does it feel. As soon as I read it I was like hold up, I literally just read almost this same thing when I read how does it feel when it released like a year or year and a half ago. Now I know no concepts are really new anymore, and inspiration comes for everywhere. But I feel like most stories it's like, oh this book has these vibes, or if you liked this book you'd like this one that's similar. But this reminds me of powerless in where there are like exact plots and plot points taken from other things. Now is that a bad thing? Not necessarily. I still enjoyed powerless, and I still enjoyed this story. But it does throw me. There are also a few red flags that the MMC Acker gave me that were not the good kind of red flags we love. First, when they are riding thru the city and people throw stuff at the FMC and he does nothing? Red flag. When they meet his dad and they demand she vows not only to the king but to the MMC? Red flag. All the secrets he keeps? Red flag. When he SLAPS HER IN THE END? Red flag. I'm not sure how I really feel about him. In the end. This was still an enjoyable read. I did like it and I am curious about the next book. But I am wary about some of the plot points and the MMC.
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Reviewed in the United States on November 26, 2024
S
Verified Purchase
SJS
Port Orchard, US
★★★★★ 5
Just read it. You won’t regret it.
Format: Hardcover
This book completely blew me away. I loved every single character—not just the FMC and MMC, but the side characters too, which is rare. In a first book, side characters can feel flat while the focus is on world-building, but that definitely wasn’t the case here. The romantic tension between the FMC and MMC was so good—seriously addictive. The plot itself felt pretty straightforward at first, and the world-building was easy to follow. It even gave me Heartless Hunter / Wolf King vibes… until the last 20 pages. And wow—those final pages. I usually spot plot twists coming, and I thought this one was going to be predictable, but I was completely wrong. That ending genuinely shocked me—I haven’t had that reaction to a book in a long time. I’m already counting down to book two (and that teaser chapter? Absolutely brutal). Just read it. You won’t regret it.
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Reviewed in the United States on May 4, 2026
N
Verified Purchase
Nicole
Houston, US
★★★★★ 4
4 Stars for Now!
Format: Kindle
I DEVOURED this book. I was in a huge slump after reading a horrible series right before this but after 3 pages of this book, I was hooked. I read the whole book in 2 days. I think the author did an amazing job at writing an engaging story with an amazing twist at the end. I know many readers feel betrayed by the twist and find the narrator to be unreliable but I feel that the twist was done in a great unsuspecting way. Though I do feel betrayed, I think there is so much room for redemption in the second book! The author also did an amazing job at world/character building. She was able to do so without interrupting the story which is one of my huge pet peeves. A lot of authors build by taking breaks in the plot or dialogue which I find choppy and disengaging but this author was able to build in an engaging way. There was some lack of world/character building but I think that was due to keeping reader in the dark. The world, politics, and characters were all very easy to understand. I found the romance a little lackluster and a bit off-kilter. Some of it was really pushy and rushed which left a bad taste in my mouth. I do hope the author delves deeper into the romance in coming books. The FMC was a breath of fresh air. She was not whiny or stuck-up like most books. She was never afraid to accept help from others but she was still able to shine with her intelligence. Not once did I think she made a poor decision just for the sake of a plot point. She was really easy to like. The MMC could use some work but I think that will happen more in coming books. This is a MUST read, my only advice would be to wait until it is a finished series!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 30, 2025

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