Thermostat (71°C/160°F) – Fits Suzuki Outboard DF90-DF300 (Replaces 17670-90J10, 5033722)
Thermostat (71°C/160°F) – Fits Suzuki Outboard DF90-DF300 (Replaces 17670-90J10, 5033722) is backordered and will ship as soon as it is back in stock.
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Thermostat (71°C/160°F) – Fits Suzuki Outboard DF90-DF300 (Replaces...
Product Details
This is a direct replacement Thermostat (71°C/160°F) – Fits Suzuki Outboard DF90-DF300 (Replaces 17670-90J10) for Suzuki 4-Stroke outboard motors from 90 to 300 HP (2001–2016). It is designed to regulate engine temperature by opening at 71°C (160°F) to ensure optimal performance and prevent overheating in DF90, DF100, DF115, DF140, DF150, DF175, DF200, DF225, DF250, and DF300 series engines.
This component provides a direct interchange for Suzuki part numbers 17670-90J10 and 17670-90J10-000, as well as OMC/Johnson/Evinrude part 5033722.
- Designed for direct, drop-in replacement of the original OEM part.
- Regulates coolant flow by opening at a factory-specified 71°C (160°F).
- Package includes one thermostat for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Suzuki | 17670-90J10 |
| Suzuki | 17670-90J10-000 |
| OMC/Johnson/Evinrude | 5033722 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Suzuki | DF90 | 90 | 4-Stroke | 2001–2008 | 17670-90J10 |
| Suzuki | DF100 | 100 | 4-Stroke | 2012–2016 | 17670-90J10 |
| Suzuki | DF115 | 115 | 4-Stroke | 2001–2008, 2012–2016 | 17670-90J10 |
| Suzuki | DF140 | 140 | 4-Stroke | 2002–2016 | 17670-90J10 |
| Suzuki | DF150 | 150 | 4-Stroke | 2006–2016 | 17670-90J10 |
| Suzuki | DF175 | 175 | 4-Stroke | 2006–2016 | 17670-90J10 |
| Suzuki | DF200 | 200 | 4-Stroke | 2004–2016 | 17670-90J10 |
| Suzuki | DF225 | 225 | 4-Stroke | 2004–2016 | 17670-90J10 |
| Suzuki | DF250 | 250 | 4-Stroke | 2004–2016 | 17670-90J10 |
| Suzuki | DF300 | 300 | 4-Stroke | 2007–2014 | 17670-90J10 |
Technical Specs
- Product Type
- Engine Thermostat
- Installation
- Direct Replacement for OEM
- Temperature Rating
- 71°C (160°F)
- Housing Material
- ABS + Metal
- Housing Color
- Silver/White
- Operating Temperature
- 71°C (160°F) opening temperature
- Other Technical Attributes
- Regulates engine cooling by opening at 71°C (160°F) to allow coolant flow
What’s in the Box
- 1 x Thermostat (17670-90J10)
Installation Notes
- Ensure the engine is completely cool before starting.
- Disconnect the negative battery terminal for safety.
- Locate the thermostat housing, typically on the top of the engine block.
- Place a drain pan underneath and carefully unbolt the housing cover.
- Remove the old thermostat and gasket, noting its orientation.
- Thoroughly clean the mating surfaces of the housing and engine block.
- Install the new thermostat in the same orientation as the original.
- Fit a new gasket and reinstall the housing cover, tightening bolts to the manufacturer's specified torque.
- Refill the cooling system with the correct type and amount of coolant.
- Reconnect the battery terminal, start the engine, and check for any leaks as it warms up.
- Monitor the temperature gauge to ensure the engine operates within the normal range.
Troubleshooting & FAQ
How do I know if my thermostat is failing?
Common signs of a faulty thermostat include engine overheating, running too cool (not reaching operating temperature), erratic temperature gauge readings, or coolant leaks around the thermostat housing.
What temperature does this thermostat open at?
This thermostat is designed to open at 71°C (160°F), allowing coolant to circulate through the engine and radiator to maintain optimal operating temperature.
Is this a direct replacement for my Suzuki part?
Yes, this is a direct aftermarket replacement for Suzuki part numbers 17670-90J10 and 17670-90J10-000. Please verify your engine model and year in the compatibility table.
How often should an outboard thermostat be replaced?
Thermostats are a critical maintenance item. It is recommended to inspect them annually and replace them every 2-3 years or as specified by your engine's service manual, especially when operating in saltwater.
What happens if I use the wrong temperature thermostat?
Using a thermostat with the wrong temperature rating can lead to poor engine performance. One that opens too early will cause the engine to run too cool, increasing fuel consumption and wear. One that opens too late can cause the engine to overheat, risking severe damage.
Do I need a new gasket for installation?
Yes, it is highly recommended to use a new gasket whenever replacing the thermostat to ensure a proper seal and prevent coolant leaks. Gaskets are often sold separately.
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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