Thermostat (60°C/140°F) – Fits Suzuki 4-Stroke 70-300 HP (Replaces 17670-90J00, 17670-90J01)
Thermostat (60°C/140°F) – Fits Suzuki 4-Stroke 70-300 HP (Replaces 17670-90J00, 17670-90J01) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Thermostat (60°C/140°F) – Fits Suzuki 4-Stroke 70-300 HP (Replaces ...
Product Details
This Thermostat (60°C/140°F) – Fits Suzuki 4-Stroke 70-300 HP Outboards is an essential cooling system component designed for a wide range of Suzuki 4-stroke outboard engines from 70 HP to 300 HP (2001–2020). It maintains optimal engine operating temperature by opening at 60°C (140°F), ensuring efficient performance and preventing overheating.
It serves as a direct replacement for Suzuki parts 17670-90J00 and 17670-90J01, and is also a cross-reference for Sierra 18-3632 and multiple Yamaha part numbers.
- Engineered for direct OEM replacement fit.
- Regulates cooling system temperature for engine protection.
- Includes thermostat 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 | OEM Reference |
| Suzuki | 17670-90J01 | OEM Reference |
| Sierra | 18-3632 | Aftermarket Interchange |
| Yamaha | 67F-12411-00-00 | Cross-Reference; Superseded by 67F-12411-01-00 |
| Yamaha | 67F-12411-01-00 | Cross-Reference |
| Yamaha | 6CB-12411-00-00 | Cross-Reference |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This thermostat fits a wide range of Suzuki DF series 4-stroke outboards from 2001 onwards.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Suzuki | DF70 | 70 | 4-Stroke | 2009–2020 | 17670-90J00/17670-90J01 |
| Suzuki | DF80 | 80 | 4-Stroke | 2009–2012 | 17670-90J00/17670-90J01 |
| Suzuki | DF90 | 90 | 4-Stroke | 2001–2020 | 17670-90J00/17670-90J01 |
| Suzuki | DF100 | 100 | 4-Stroke | 2009–2010 | 17670-90J00/17670-90J01 |
| Suzuki | DF115 | 115 | 4-Stroke | 2001–2012 | 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 | 2006–2011 | 17670-90J00/17670-90J01 |
| Suzuki | DF200 | 200 | 4-Stroke | 2004–2013 | 17670-90J00/17670-90J01 |
| Suzuki | DF225 | 225 | 4-Stroke | 2004–2013 | 17670-90J00/17670-90J01 |
| Suzuki | DF250 | 250 | 4-Stroke | 2004–2017 | 17670-90J00/17670-90J01 |
| Suzuki | DF300 | 300 | 4-Stroke | 2007–2010 | 17670-90J00/17670-90J01 |
It is also cross-compatible with many Yamaha 4-stroke models, though additional hardware may be required for certain applications.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| 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 |
| 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 | VF200/225/250 | 200-250 | 4-Stroke | 2009–2011 | 67F-12411-01-00 | SHO Series |
Technical Specs
- Product Type
- Engine Thermostat
- Installation
- Direct OEM replacement
- Temperature Rating
- 60°C (140°F)
- Engine Compatibility
- 4-Stroke outboard engines
- Housing Material
- Metal
- Housing Color
- Silver/Metallic
- Dimensions
- 55 × 55 × 40 mm (approx.)
- Weight
- 0.11 kg (0.25 lbs)
What’s in the Box
- 1 x Thermostat (17670-90J00)
- 2 x Thermostat Seals
Installation Notes
- Disconnect the battery before starting work.
- Allow the engine to cool completely and drain the cooling system partially to access the thermostat.
- Locate the thermostat housing on the engine block or cylinder head.
- Remove the bolts securing the housing cover. Note their positions if they are different lengths.
- Carefully remove the old thermostat and the gasket or seal.
- Thoroughly clean the mating surfaces of the housing and cover, removing all old gasket material.
- Install the new thermostat, ensuring it is oriented correctly. Place the new seals in position.
- Re-secure the housing cover and tighten the bolts to the manufacturer-specified torque.
- Refill the cooling system with the appropriate coolant, reconnect the battery, and run the engine to check for leaks and proper operating temperature.
Troubleshooting & FAQ
How do I confirm this thermostat fits my specific engine model?
The most reliable method is to match your engine's model, horsepower, and year against the compatibility tables above. Additionally, you can verify that your existing thermostat's part number is listed in our Part Number Matrix.
What are the symptoms of a failing thermostat?
Common signs include engine overheating, the temperature gauge reading unusually low, erratic temperature fluctuations, or visible coolant leaks from the thermostat housing area.
At what temperature does this thermostat begin to open?
This thermostat is rated to begin opening at 60°C (140°F), which is the standard temperature for the specified Suzuki and Yamaha models to ensure efficient engine operation.
Does this kit include the necessary seals for installation?
Yes, the package includes the thermostat itself and two new seals required for a proper, leak-free installation.
What is the main difference between this part and an OEM one?
This is a high-quality aftermarket component designed to meet or exceed original equipment manufacturer (OEM) specifications for fit, form, and function. It provides comparable performance and reliability at a better value.
How often should a marine thermostat be replaced?
While there is no fixed interval, it is often recommended to replace the thermostat as part of routine cooling system maintenance every 3-5 years, especially in saltwater environments. Replace it immediately if you suspect it is faulty.
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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