Outboard Engine Thermostat – Fits Yamaha 75-250 HP 4-Stroke (Replaces 67F-12411-00, 67F-12411-01-00, 6CB-12411-00-00, Sierra 18-3632, Suzuki 17670-90J00)
Outboard Engine Thermostat – Fits Yamaha 75-250 HP 4-Stroke (Replaces 67F-12411-00, 67F-12411-01-00, 6CB-12411-00-00, Sierra 18-3632, Suzuki 17670-90J00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Outboard Engine Thermostat – Fits Yamaha 75-250 HP 4-Stroke (Replac...
Outboard Engine Thermostat – Fits Yamaha 75-250 HP 4-Stroke (Replaces 67F-12411-00, 67F-12411-01-00, 6CB-12411-00-00, Sierra 18-3632, Suzuki 17670-90J00) is backordered and will ship as soon as it is back in stock.
Product Details
This replacement Outboard Engine Thermostat – Fits Yamaha 75-250 HP 4-Stroke (Replaces 67F-12411-00, 67F-12411-01-00) is engineered to regulate engine temperature for optimal performance in Yamaha 4-Stroke models from 75 HP to 250 HP (including F-series and VF-series SHO) manufactured from 2001 to the present.
It serves as a direct replacement for Yamaha part numbers 67F-12411-00-00, 67F-12411-01-00, and 6CB-12411-00-00, as well as Sierra 18-3632 and Suzuki 17670-90J00.
- Engineered as a direct-fit replacement for easy installation.
- Constructed from corrosion-resistant stainless steel and copper for durability in marine environments.
- Includes the necessary thermostat seal for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 67F-12411-00-00 |
| Yamaha | 67F-12411-01-00 |
| Yamaha | 6CB-12411-00-00 |
| Sierra | 18-3632 |
| Suzuki | 17670-90J00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This thermostat is confirmed to fit a wide range of Yamaha outboard engines. Check your specific model and year against the list.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F75 | 75 | 4-Stroke | 2003–2017 | 67F-12411-01-00 | |
| Yamaha | F75A | 75 | 4-Stroke | 2006–2017 | 67F-12411-01-00 | |
| Yamaha | F80 | 80 | 4-Stroke | 2001–2003 | 67F-12411-01-00 | |
| Yamaha | F90 | 90 | 4-Stroke | 2003–2015 | 67F-12411-01-00 | |
| Yamaha | F90A | 90 | 4-Stroke | 2006–2017 | 67F-12411-01-00 | |
| Yamaha | F100 | 100 | 4-Stroke | 2001–2003 | 67F-12411-01-00 | |
| Yamaha | F150 | 150 | 4-Stroke | 2004–2011 | 67F-12411-01-00 | |
| Yamaha | F150A/F150B | 150 | 4-Stroke | 2009–2023 | 67F-12411-01-00 | |
| Yamaha | F150C | 150 | 4-Stroke | 2017–2023 | 67F-12411-01-00 | |
| Yamaha | F200 (3.3L V6) | 200 | 4-Stroke | 2002–2016 | 67F-12411-01-00 | |
| Yamaha | F225 (3.3L V6) | 225 | 4-Stroke | 2002–2017 | 67F-12411-01-00 | |
| Yamaha | F250 (3.3L) | 250 | 4-Stroke | 2005–2023 | 67F-12411-01-00 | |
| Yamaha | VF200 | 200 | 4-Stroke | 2009–2010 | 67F-12411-01-00 | SHO Series |
| Yamaha | VF225 | 225 | 4-Stroke | 2009–2010 | 67F-12411-01-00 | SHO Series |
| Yamaha | VF250 (4.2L) | 250 | 4-Stroke | 2009–2010 | 67F-12411-01-00 | SHO Series |
| Suzuki | 4-Stroke | 17670-90J00 | Compatible with this thermostat |
Technical Specs
- Product Type
- Thermostat
- Installation
- Direct replacement
- Housing Material
- Stainless steel and copper
- Housing Color
- Metallic/Natural
- Weight
- 0.09 lbs (0.04 kg)
- Fitting Type
- Direct fit
- Operating Temperature
- 140°F / 60°C (opening temperature)
- Warranty
- Varies by manufacturer - Sierra offers limited lifetime warranty
- Other Technical Attributes
- High thermal conductivity, corrosion-resistant
What’s in the Box
- 1 x Thermostat (Replaces 67F-12411-01-00, 67F-12411-00-00, 6CB-12411-00-00)
- 1 x Thermostat Seal (Replaces 67F-12412)
Installation Notes
- Ensure the engine is completely cool and disconnect the battery cable.
- Locate the thermostat housing on the engine block. Place a drain pan underneath to catch any residual coolant.
- Carefully remove the bolts securing the housing cover. You may need to gently tap the cover to break the seal.
- Remove the old thermostat and the existing seal. Note the orientation of the thermostat for correct placement.
- Clean both the housing and cover surfaces thoroughly, ensuring no old gasket material remains.
- Install the new thermostat in the correct orientation, followed by the new seal.
- Reattach the housing cover and tighten the bolts to the manufacturer's recommended torque specification.
- Reconnect the battery, refill the cooling system as needed, and start the engine to check for leaks and proper temperature regulation.
Troubleshooting & FAQ
How do I confirm this thermostat fits my exact engine model?
The surest way is to match your existing part number to one of the equivalents listed in our Part Number Matrix. You should also consult the Engine & Model Compatibility table to verify your model, horsepower, and year range.
What are common signs of a failing thermostat?
A faulty thermostat can cause engine overheating (if stuck closed) or prolonged warm-up time and poor fuel economy (if stuck open). You might also notice erratic temperature gauge readings or engine alarm activation.
What is the opening temperature of this part?
This thermostat is rated to begin opening at 140°F (60°C), which is the standard specification for the listed Yamaha and Suzuki applications.
Is a new seal or gasket included?
Yes, this kit includes one new thermostat seal (replaces Yamaha part 67F-12412) required for a proper, leak-free installation.
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.
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