60°C/140°F Outboard Thermostat for Yamaha, Suzuki, Honda and Johnson/Evinrude 4-Stroke Engines
60°C/140°F Outboard Thermostat for Yamaha, Suzuki, Honda and Johnson/Evinrude 4-Stroke Engines is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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60°C/140°F Outboard Thermostat for Yamaha, Suzuki, Honda and Johnso...
60°C/140°F Outboard Thermostat for Yamaha, Suzuki, Honda and Johnson/Evinrude 4-Stroke Engines is backordered and will ship as soon as it is back in stock.
Product Details
This replacement 60°C/140°F outboard thermostat is designed to regulate engine operating temperature in selected 4-stroke outboard cooling systems. It is supplied as a single thermostat and is intended for the Yamaha, Suzuki, Honda and Johnson/Evinrude applications listed below.
The thermostat opens at approximately 60°C (140°F), helping the engine reach and maintain its specified operating temperature when the cooling system is functioning correctly.
- Single replacement thermostat for selected 4-stroke outboard engines.
- 60°C (140°F) opening temperature.
- Use the complete engine model, year and serial-number information where applicable to confirm fitment before ordering.
- Aftermarket replacement; not an original manufacturer component.
Part Number References
The following manufacturer and aftermarket numbers are listed as references for this replacement thermostat. A part-number match should still be confirmed against the specific engine application.
| Brand or source | Reference number | Type |
|---|---|---|
| Yamaha | 67F-12411-01 | Manufacturer reference |
| Yamaha | 6CB-12411-00 | Manufacturer reference |
| Yamaha | 67F-12411-00-00 | Manufacturer reference |
| Suzuki | 17670-90J00 | Manufacturer reference |
| Suzuki | 17670-90J01 | Manufacturer reference |
| Suzuki | 17670-93J00 | Manufacturer reference |
| Honda | 19300-ZX2-003 | Manufacturer reference |
| Johnson/Evinrude/OMC | 5033721 | Manufacturer reference |
| Johnson/Evinrude | 0769254 | Manufacturer reference |
| Sierra | 18-3632 | Aftermarket reference |
Engine Compatibility
Company fitment records identify the following 4-stroke outboard applications. Model designations, production years and serial-number ranges can vary by market and configuration; compare your engine identification label and original thermostat before installation.
| Brand | Models or configuration | Stroke | Temperature | Fitment notes |
|---|---|---|---|---|
| Yamaha | F80A, F80B, F100A, F100B, F150A, F200A, F200C, F225A, F225B, F225C, F250A, F250B | 4-Stroke | 60°C / 140°F | Confirm the exact model designation and year. |
| Suzuki | DF70, DF90, DF115, DF140, DF175, DF200, DF225, DF250, DF300 | 4-Stroke | 60°C / 140°F | Company records include model-specific year ranges; verify the engine label before ordering. |
| Johnson/Evinrude | 4-cylinder 90 hp, 115 hp and 140 hp; 6-cylinder 200 hp and 225 hp | 4-Stroke | 60°C / 140°F | Confirm the engine configuration and applicable manufacturer reference. |
| Honda | BF175D, BF200D, BF225D, BF250A | 4-Stroke | 60°C / 140°F | Manufacturer reference listed as 19300-ZX2-003. |
Technical Specifications
- Product type
- Outboard engine thermostat
- Product configuration
- Single thermostat
- Opening temperature
- 60°C (140°F)
- Engine type
- Selected 4-stroke outboard engines
- Installation
- Installs in the engine thermostat housing according to the applicable service procedure
- Construction material
- Not specified in the available product record
- Dimensions and weight
- Not specified in the available product record
- Warranty
- Refer to the seller's current warranty terms
What's in the Box
- 1 x 60°C/140°F outboard thermostat
A housing gasket or other installation hardware is not listed as included. Check the existing gasket and replace it if required by the engine service procedure.
Installation Notes
- Allow the engine to cool completely before beginning work.
- Disconnect the battery or follow the isolation procedure specified in the engine service manual.
- Locate the thermostat housing and remove the cover using the correct tools.
- Note the original thermostat orientation before removal.
- Clean the housing and cover sealing surfaces without damaging them.
- Install the new thermostat in the same orientation as the original part.
- Install a suitable new gasket or seal if required by the engine manufacturer.
- Reassemble the housing and tighten fasteners to the service-manual torque specification.
- Restore the cooling system as required for the specific engine and check for leaks.
- Run the engine according to the service procedure and verify normal water flow and temperature behavior.
Installation requirements differ between engine models. Use the applicable factory or qualified service manual for torque values, sealing requirements and cooling-system procedures.
Troubleshooting & FAQ
What does the 60°C/140°F rating mean?
It is the specified opening temperature of the thermostat. The thermostat begins opening at approximately 60°C (140°F) to regulate coolant flow through the engine's cooling system.
How do I know whether this thermostat fits my engine?
Match your complete engine brand, model designation, horsepower, stroke, year and any required serial-number range with the compatibility information and the original thermostat reference. Do not rely on horsepower alone.
What symptoms can indicate a thermostat problem?
A thermostat that is stuck closed may contribute to overheating, while one that is stuck open may prevent the engine from reaching its normal operating temperature. Cooling-system blockages, water-pump problems and sensors can cause similar symptoms, so diagnose the complete system.
Is this an OEM thermostat?
No. This is an aftermarket replacement. The manufacturer reference numbers in this listing are provided for application identification and cross-reference purposes.
Is a gasket included?
The available product record lists one thermostat and does not list a gasket as an included component. Check the gasket requirement for your exact engine and replace it when required.
Can I use the thermostat without checking the engine model?
No. The 60°C/140°F rating alone does not establish fitment. Confirm the complete engine application and compare the original part before installation.
Safety & Important Information
- Work only on a cool engine and follow the applicable service-manual safety procedures.
- Verify the engine model, year, stroke, configuration and serial-number requirements before ordering.
- Do not install a thermostat with a different temperature rating unless the engine manufacturer specifies it.
- Inspect the cooling system for debris, corrosion, restricted passages and water-pump problems if overheating persists.
- Professional installation is recommended when the required service procedure is unfamiliar.
About Sea Sierra
- Marine replacement parts for routine service and repair applications.
- Product information is presented with manufacturer references and application details to support fitment checking.
- For the best result, compare the original component and consult the applicable engine service documentation before installation.
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