Thermostat (60°C/140°F) – Fits Suzuki & Yamaha 4-Stroke Outboards (Replaces 17670-90J00, 67F-12411-01-00)
Thermostat (60°C/140°F) – Fits Suzuki & Yamaha 4-Stroke Outboards (Replaces 17670-90J00, 67F-12411-01-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Thermostat (60°C/140°F) – Fits Suzuki & Yamaha 4-Stroke Outboar...
Product Details
This engine Thermostat (60°C/140°F) is an essential cooling system component that regulates engine operating temperature for a wide range of 4-stroke outboards. It is designed for Suzuki (70-300 HP, 2001-Current), Yamaha (75-250 HP, 2001-Current), Johnson/Evinrude (90-225 HP, 2003-2006), and various Mercury/Mariner (75-225 HP) models, ensuring your engine runs efficiently and avoids overheating.
This part serves as a direct replacement for Suzuki 17670-90J00/17670-90J01, Yamaha 67F-12411-00-00/67F-12411-01-00/6CB-12411-00-00, Sierra 18-3632, and Mercury 8556761/5033721.
- Installs as a direct OEM-equivalent replacement.
- Regulates engine temperature by opening at 60°C (140°F).
- Package includes the thermostat and required seals for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Suzuki | 17670-90J00 | Superseded by 17670-90J01 |
| 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| Yamaha | 67F-12411-00-00 | Superseded by 67F-12411-01-00 |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 equivalent |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Suzuki Owners: This thermostat fits most DF series outboards from 70 to 300 HP manufactured between 2001 and 2010. Compatibility for post-2010 models should be verified.
For Yamaha Owners: Extensive compatibility with F series and VMAX SHO outboards from 75 to 250 HP, including left-hand rotation (LF) models.
For Johnson/Evinrude Owners: Fits select 4-stroke models from 90 to 225 HP made between 2003 and 2006. Confirm by visual comparison.
For Mercury/Mariner Owners: Compatibility is based on serial number ranges for various 75-225 HP EFI and carbureted models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| 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 | 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 | 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 | 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 Specs
- 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
What’s in the Box
- 1 x Thermostat
- 2 x Thermostat Seals
Installation Notes
- Ensure the engine is completely cool and disconnect the battery.
- Place a container beneath the engine and drain the coolant.
- Locate the thermostat housing on the engine block.
- Carefully remove the bolts securing the housing cover.
- Remove the old thermostat and its gasket or seal. Note the orientation of the thermostat.
- Thoroughly clean both the housing and cover mating surfaces.
- Install the new thermostat and seal in the correct orientation.
- Re-secure the housing cover, tightening bolts to the manufacturer's specified torque.
- Refill the cooling system with the appropriate coolant.
- Reconnect the battery, start the engine, and carefully check for any leaks as it warms up.
Troubleshooting & FAQ
How do I know if my thermostat is failing?
Common signs include the engine overheating at various speeds, temperature alarms, or the engine taking an unusually long time to reach its normal operating temperature. Faulty thermostats can get stuck open (engine runs too cool) or stuck closed (engine overheats).
What temperature does this thermostat open at?
This thermostat is rated to begin opening at 60°C (140°F), helping the engine warm up quickly and then maintaining a stable operating temperature.
Are new gaskets or seals included?
Yes, this kit includes two thermostat seals. However, it is always best practice to visually compare the new seals with your old ones before installation to ensure a perfect match for your specific housing.
Can I install this part myself?
Installation is straightforward for those with basic mechanical skills and the correct tools. However, due to its critical role in engine health, professional installation is recommended to prevent coolant leaks and ensure proper function.
Does this fit both V6 and inline Yamaha engines?
Yes, the compatibility data confirms it fits a variety of F200 and other HP models, which includes both inline-4 and V6 configurations. Always check your specific model and year in our compatibility table.
Why are there so many OEM part numbers?
Manufacturers frequently update part numbers over the product lifecycle. This thermostat is engineered to be a direct cross-reference for several original Suzuki and Yamaha part numbers, as well as their predecessors.
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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