Thermostat Cover Gasket – Fits Yamaha F150 Outboard Motors (Replaces 63P-12414-00-00)
Thermostat Cover Gasket – Fits Yamaha F150 Outboard Motors (Replaces 63P-12414-00-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This Thermostat Cover Gasket provides a reliable seal for the thermostat housing on Yamaha F150, F150A, F150B, and F150C 4-Stroke outboard engines (2004–2023). It is engineered to prevent coolant leaks and ensure your engine maintains its optimal operating temperature.
This part is a direct replacement for Yamaha OEM part number 63P-12414-00-00.
- Installs directly between the thermostat housing and cover.
- Manufactured to meet or exceed OEM specifications for a perfect fit.
- Helps maintain the integrity of your engine's cooling system.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 63P-12414-00-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is designed for a wide range of Yamaha F150 4-Stroke models manufactured between 2004 and 2023.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F150AET1X | 150 | 4-Stroke | 2010 | 63P-12414-00-00 | |
| Yamaha | F150JA | 150 | 4-Stroke | 2012–2014 | 63P-12414-00-00 | |
| Yamaha | F150JB | 150 | 4-Stroke | 2015–2016 | 63P-12414-00-00 | |
| Yamaha | F150LA | 150 | 4-Stroke | 2012–2014 | 63P-12414-00-00 | |
| Yamaha | F150LB | 150 | 4-Stroke | 2015–2016 | 63P-12414-00-00 | |
| Yamaha | F150TJR | 150 | 4-Stroke | 2009–2011 | 63P-12414-00-00 | |
| Yamaha | F150TLR | 150 | 4-Stroke | 2004–2011 | 63P-12414-00-00 | |
| Yamaha | F150TLRC | 150 | 4-Stroke | 2004 | 63P-12414-00-00 | |
| Yamaha | F150TLRD | 150 | 4-Stroke | 2005 | 63P-12414-00-00 | |
| Yamaha | F150TXR | 150 | 4-Stroke | 2004–2011 | 63P-12414-00-00 | |
| Yamaha | F150TXRC | 150 | 4-Stroke | 2004 | 63P-12414-00-00 | |
| Yamaha | F150TXRD | 150 | 4-Stroke | 2005 | 63P-12414-00-00 | |
| Yamaha | F150XA | 150 | 4-Stroke | 2012–2014 | 63P-12414-00-00 | |
| Yamaha | F150XB | 150 | 4-Stroke | 2015–2016 | 63P-12414-00-00 | |
| Yamaha | FL150AET1X | 150 | 4-Stroke | 2010 | 63P-12414-00-00 | |
| Yamaha | LF150TXR | 150 | 4-Stroke | 2004–2011 | 63P-12414-00-00 | |
| Yamaha | LF150TXRC | 150 | 4-Stroke | 2004 | 63P-12414-00-00 | |
| Yamaha | LF150TXRD | 150 | 4-Stroke | 2005 | 63P-12414-00-00 | |
| Yamaha | LF150XA | 150 | 4-Stroke | 2012–2014 | 63P-12414-00-00 | |
| Yamaha | LF150XB | 150 | 4-Stroke | 2015–2016 | 63P-12414-00-00 | |
| Yamaha | F150C | 150 | 4-Stroke | 2017–2023 | 63P-12414-00-00 | |
| Yamaha | F150A-F150B | 150 | 4-Stroke | 2009–2023 | 63P-12414-00-00 |
Technical Specs
- Product Type
- Thermostat Cover Gasket
- Installation
- Direct fit between thermostat housing and cover
- Dimensions
- 11.0″ L x 10.0″ W x 0.2″ H
- Warranty
- Manufacturer standard warranty
- Other Technical Attributes
- OEM replacement part
What’s in the Box
- 1 x Thermostat Cover Gasket (63P-12414-00-00)
Installation Notes
- Ensure the engine is completely cool and disconnect the negative battery terminal for safety.
- Locate the thermostat housing and place a drain pan beneath it. Partially drain the engine coolant until the level is below the housing.
- Carefully remove the bolts securing the thermostat cover. Note their length and position if they differ.
- Pry the cover off gently. Remove the old thermostat and gasket.
- Thoroughly clean both the housing and cover mating surfaces. Remove all traces of old gasket material, corrosion, or sealant.
- Position the new gasket correctly on the housing.
- Reinstall the thermostat cover and tighten the bolts in a crisscross pattern to the manufacturer's specified torque. Do not overtighten.
- Refill the cooling system with the recommended coolant, then start the engine and check for any leaks around the housing as it comes to temperature.
Troubleshooting & FAQ
How do I know if my thermostat gasket needs replacing?
Common signs include coolant leaks around the thermostat housing, engine overheating alerts, or visible damage such as cracks, brittleness, or compression of the old gasket upon inspection.
Do I need to use sealant with this gasket?
This gasket is typically designed to be installed dry. Applying additional sealants can interfere with a proper seal and may not be necessary. Always consult your engine’s service manual for the definitive procedure.
Will this fit my Yamaha F150C model?
Yes, this gasket is compatible with Yamaha F150C models from 2017-2023, along with a wide range of other F150 models from 2004 onwards. Verify your specific model in the compatibility table above.
What is the recommended replacement interval?
It is best practice to replace the thermostat cover gasket whenever the thermostat is replaced or the cooling system is being serviced to ensure a fresh, reliable seal.
What are the signs of a failing thermostat gasket?
The most common sign is a visible coolant leak (often leaving a colored residue after drying) from the seam between the thermostat housing and its cover. This can lead to engine overheating if the coolant level drops significantly.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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