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Description
Thermostat Gasket – Fits Yamaha 75-225 HP Outboard Motors (Replaces 688-12414-A1-00, 688-12414-00-00)Thermostat Gasket Fits Yamaha 75 225 HP Outboard Motors This thermostat cover gasket is designed for a precise fit on a wide range of Yamaha 2 stroke outboard engines, including V4 and V6 models from 75 HP to 225 HP (1992 and later). It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring a reliable seal for the thermostat housing and preventing coolant leaks. Engineered from high temperature resistant materials, this
Thermostat Gasket – Fits Yamaha 75-225 HP Outboard Motors
This thermostat cover gasket is designed for a precise fit on a wide range of Yamaha 2-stroke outboard engines, including V4 and V6 models from 75 HP to 225 HP (1992 and later). It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring a reliable seal for the thermostat housing and preventing coolant leaks.
Engineered from high-temperature resistant materials, this gasket provides durability and maintains performance under demanding marine conditions, preventing overheating and ensuring proper engine temperature regulation.
- Installation: Direct replacement for a secure, leak-free fit.
- Fitment: Fits Yamaha V4 & V6 2-Stroke outboards (75-225 HP).
- Included: One thermostat cover gasket.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Yamaha | 688-12414-A1-00 |
| Yamaha | 688-12414-A0-00 |
| Yamaha | 688-12414-00-00 |
| Sierra | 18-0844 |
| Mallory | 9-60003 |
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.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | 75A | 75 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | E75B | 75 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 75C | 75 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | P75 | 75 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 80A | 80 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 85A | 85 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 90E | 90 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 90A | 90 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | B90 | 90 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | C90 | 90 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 100A | 100 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 115E | 115 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 115A | 115 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | E115A | 115 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 115B | 115 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 115C | 115 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | B115 | 115 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | S115 | 115 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 130B | 130 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | S130 | 130 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 140A | 140 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 140B | 140 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 150E | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 150A | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 150C | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 150F | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 150G | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | D150H | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 150J | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 150L | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | D150N | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | Z150P | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | Z150Q | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | S150 | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | SX150 | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | V150 | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | VX150 | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | ProV150 | 150 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 175A | 175 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 175B | 175 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 175D | 175 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 175F | 175 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | Z175G | 175 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | Z175H | 175 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | S175 | 175 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | V175 | 175 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | VZ175 | 175 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 200E | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 200A | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 200B | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 200C | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | Pro V 200 | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 200F | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 200G | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 200J | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | Z200N | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | Z200P | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | S200 | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | SX200 | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | VZ200 (2.6L) | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | Z200 (2.6L) | 200 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 220A | 220 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 225A | 225 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 225B | 225 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
| Yamaha | 225D | 225 | 2-Stroke | 1992 and later | 688-12414-A1-00 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Thermostat Cover Gasket |
| Installation | Direct replacement |
| Material | High-temperature resistant material |
| Shape | Rectangular |
| Fitment | Yamaha V4, V6 2-Stroke Outboards |
| Warranty | 30-day return/replacement (Amazon) |
| Weight | 0.63 oz (17.9 g) |
Package Contents
- 1 x Thermostat Gasket (688-12414-A1-00)
Installation Guide
- Safety First: Ensure the engine is cool and disconnect the battery's negative terminal.
- Drain Coolant: Partially drain the engine's cooling system to a level below the thermostat housing to prevent spills.
- Locate Housing: Identify the thermostat housing on the engine block.
- Remove Cover: Carefully unbolt and remove the thermostat housing cover. Note the orientation of the bolts if they differ in length.
- Remove Old Gasket: Take out the old, worn gasket. Thoroughly clean both the housing and cover surfaces, removing any residual gasket material or corrosion.
- Install New Gasket: Position the new gasket correctly onto the cleaned surface of the housing.
- Reassemble: Re-install the thermostat cover and tighten the bolts in a crisscross pattern to the manufacturer's recommended torque specification.
- Refill Coolant: Top off the cooling system with the appropriate coolant.
- Final Check: Reconnect the battery. Start the engine, let it reach operating temperature, and carefully inspect the housing for any signs of leaks.
Troubleshooting & FAQ
Q: How do I confirm this gasket fits my Yamaha engine?
A: Check the compatible models table and cross-reference your engine's model and year. This gasket fits a wide range of Yamaha 2-stroke V4 and V6 outboards from 75 HP to 225 HP (1992 and later). Also, verify the OEM part number matches 688-12414-A1-00.
Q: What are the signs that my thermostat gasket is failing?
A: Common signs include coolant leaks around the thermostat housing, engine overheating, or fluctuating engine temperatures. A visible crack or brittle material on the old gasket during inspection also indicates it's time for a replacement.
Q: Is this an original Yamaha OEM part?
A: No, this is an aftermarket part designed to meet or exceed OEM specifications. It replaces Yamaha part numbers 688-12414-A1-00, 688-12414-A0-00, and 688-12414-00-00.
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 10 reviews
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Product Reviews
★★★★★ 5
Absolutely love this room divider!
Color: Beige, Size: 3 Panel-102‘’-Round Pad, Color: Beige, Size: 3 Panel-102‘’-Round Pad
When they say you can't see anything through it, they are correct. As you can see by the video, the cars are traveling by with the sunlight on the divider and you still can't see any cars passing nor can you see the ones in the parking lot. You can also tell it blocks out the sunlight too which is a definite plus for our store. Quality material on the divider. Material is nice and snug on the poles with no ripples. I also like the base of these, they make the divider nice and sturdy and can be adjusted if floor is uneven. Also the design of the legs allow them to go under your furniture. Also putting them together is pretty easy. Just make sure you when you are putting the poles together to make sure at the top of the pole that the indent screw hole faces out. This makes for a better look. The directions don't say which way to turn and at 1st, I had one, one way and the other was another way as both ways work that way but I wanted a uniform/better look.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 29, 2024
★★★★★ 4
Works well, need power tool to assemble
Color: Beige, Size: 3 Panel-102‘’-Round Pad, Color: Beige, Size: 3 Panel-102‘’-Round Pad
Sturdy enough, especially when feet are positioned for balance. Works perfectly to create a WFH “cubicle”. Can adjust the size to provide complete privacy or fold back a panel when I want more openness. The fabric panels are not perfectly taught, but pretty close. The only negative is that without my husband’s power drill/screwdriver we wouldn’t have been able to put it together. It would take the strength of Thor to do it with just a manual screwdriver.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 30, 2022
★★★★★ 5
Now I don't have to see the "black hole" that used to be my family room!
Color: Black, Size: 4 Panel-136‘’W-Round Pad
I have an adult child living at home and his bedroom is tiny, so he's pretty much taken over the family room. We are both much happier now that the divider is up. It is about 12 feet long and gives him privacy to watch his movies and play his video games. And I don't have to see all the shoot-em-up stuff he likes to watch. I put the divider together with just a screwdriver (not a power one, that would be nice but I don't have so I had to use a little elbow grease.) It took a couple hours. The instructions are straightforward. I did have to use my long dining room table to attach the feet to the divider panels, which was a bit tricky. But I'm really pleased with the end result. I'm NOT a handywoman, so I feel proud that I did it "all by myself." He wanted the black fabric, but I think the lighter colors would have been better for a room that gets hot in the summer. Just my opinion. Whatever color you choose, I think you'll like the end result.
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Reviewed in the United States on July 18, 2023
★★★★★ 3
Busted spring on one side....
Color: Black, Size: 28-70"W x 48-120"H (Pack of 1), Color: Black, Size: 28-70"W x 48-120"H (Pack of 1)
I would have given it five stars except for the fact that 1) the instructions that come with it are miserable so you will definitely want to refer to the photos they have in the advertisement here, and 2) it appears that one of the vertical poles has a busted spring and I literally had to stuff some socks underneath it to make it hold. Definitely an eyesore, so I'm not thrilled about that.
With that being said, I'm in an apartment and I don't want to drill in the walls to hang a curtain rod. My sliding glass doors have a track that I was able to get brackets that fit over the track to hold a pole, but I had one window that I could not do that with. I thought this would be an interesting way to hang curtains without doing damage. I considered those sticky tape curtain rod holders, but I was reading a lot of bad reviews about them not holding or them taking the paint off upon removal. I figured this was the better option and it gave the room some nice aesthetics because my furniture is farmhouse white wood with black iron accents, so this blended really well with the aesthetics of the room. I know that most people who did reviews used this product as its advertised to be a room divider for privacy... So I figured this is a nice way to review using this product in a different way. I just really can't stand window blinds, as they look so commercial and industrial to me... I needed a way to make the space seem more homey.
While this is working fine for me, the reality is I have white lace curtains, which don't weigh much. I don't know that I could recommend this product, even though it says it can support a bit of weight, with curtains that are too heavy. Some of that, in part, is due to the fact that one of my springs is broken so it's not very stable as it is. However, even if I was not having the issue with the spring being busted on one side, I still don't think this would be good with heavy curtains (especially if you like opening your curtains frequently).
It did come with curtain hooks if you have the kind of curtains that allow you to use hooks to hang them. I do not. My curtains just slide onto the pole. If they were the type that could be put up with hooks then opening and closing them would probably be easier and maybe not as big of a deal as it is for me with the type of curtains I have.
I cannot comment on longevity as I just installed it today... If anything changes I will try to remember to come back and modify this review.
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Reviewed in the United States on July 6, 2025
★★★★★ 5
Easy setup works well
Color: Black, Size: 28-70"W x 48-120"H (Pack of 1)
I love these! Have bought two so far. Easy set up and no damage to walls. Room divider or window curtains. Works great!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 6, 2026
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