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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