133°F Thermostat for Evinrude/Johnson 115–175 HP V6 Outboards – Replaces 0437090
133°F Thermostat for Evinrude/Johnson 115–175 HP V6 Outboards – Replaces 0437090 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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133°F Thermostat for Evinrude/Johnson 115–175 HP V6 Outboards – Rep...
133°F Thermostat for Evinrude/Johnson 115–175 HP V6 Outboards – Replaces 0437090 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket 133°F / 56°C thermostat is a replacement for selected Evinrude and Johnson V6 outboard cooling systems rated from 115 HP through 175 HP. It is intended to help the engine maintain its specified operating temperature and is listed for higher-flow 90° V6 applications.
The company fitment record lists Evinrude/Johnson 115 HP, 135 HP, 150 HP, and 175 HP outboards. The thermostat replaces selected OEM references including 0436174, 0437090, 0765585, and 0435100. Additional listed cross-references include Sierra 18-3545, OMC/BRP 437090 and BRP8M6010303, and Mallory 9-43031.
- Aftermarket replacement thermostat for selected Evinrude/Johnson outboards.
- 133°F / 56°C temperature rating as listed for this product.
- Designed for the listed higher-flow 90° V6 applications.
- Thermostat only; gasket and other installation hardware are not included unless separately specified.
Part Number Matrix
Use the following references to compare the thermostat with your original part. Always confirm the complete engine model and year before ordering.
| Brand or Reference | Part Number |
|---|---|
| Johnson/Evinrude OEM reference | 0436174 |
| Johnson/Evinrude OEM reference | 0437090 / 437090 |
| Johnson/Evinrude OEM reference | 0765585 |
| Johnson/Evinrude OEM reference | 0435100 |
| Sierra cross-reference | 18-3545 |
| OMC/BRP cross-reference | BRP8M6010303 |
| Mallory cross-reference | 9-43031 |
Engine & Model Compatibility
Compatibility depends on the complete model designation, year, and cooling-system configuration. The company fitment information identifies the following applications:
| Brand | Engine Group | Rated HP | Stroke | Year Information | Application Notes |
|---|---|---|---|---|---|
| Evinrude | E115 | 115 | Not specified in the company record | 1997 | Confirm the complete model designation before ordering. |
| Evinrude | E135 | 135 | V6 application as listed | Year not specified in the company record | Listed for the higher-flow 90° application. |
| Evinrude | E150 | 150 | V6 application as listed | 2000–2006 | Confirm the complete model designation before ordering. |
| Evinrude | E175 | 175 | V6 application as listed | 2000–2006 | Confirm the complete model designation before ordering. |
| Johnson/Evinrude | Selected V6 outboards | 115–175 | V6; higher-flow 90° application | Selected applications only | Do not rely on horsepower alone; match the original thermostat and model information. |
Technical Specs
- Product Type
- Thermostat
- Temperature Rating
- 133°F / 56°C
- Application
- Selected Evinrude/Johnson V6 outboards, 115–175 HP
- Cooling-System Configuration
- Higher-flow 90° application as listed by the company record
- Material
- Not specified in the company record
- Installation
- Installs in the engine thermostat housing; follow the applicable service manual
What’s in the Box
- 1 x Thermostat
Not included: thermostat housing gasket, sealant, or other installation hardware unless separately stated.
Installation Notes
- Verify the complete engine model, year, original thermostat, and part-number references before beginning work.
- Switch off the engine, remove the ignition key, and allow the engine to cool completely.
- Follow the engine manufacturer’s service procedure to access the thermostat housing.
- Remove the old thermostat and note its installed orientation before taking it out.
- Clean the housing and cover mating surfaces without damaging them.
- Install the replacement thermostat in the same orientation as the original and use a new gasket when required.
- Reinstall the housing and tighten fasteners to the manufacturer’s specified torque.
- Operate the engine according to the service manual and check for leaks or abnormal temperature behavior.
Installation details can vary by model. If the original part, housing, or thermostat orientation differs from the listed application, stop and verify compatibility before installation.
Troubleshooting & FAQ
What temperature rating does this thermostat have?
The company product record lists a rating of 133°F / 56°C.
Which engines is this thermostat intended for?
The listed applications are selected Evinrude/Johnson V6 outboards from 115 HP through 175 HP, including E115 (1997), E135, E150 (2000–2006), and E175 (2000–2006). Confirm the complete model designation before purchase.
Is this a thermostat kit?
No. This product is a single thermostat. The housing gasket and other installation parts are not included unless separately specified.
Does the package include a gasket?
No. The package contains the thermostat only. A new gasket is recommended when required by the engine manufacturer’s service procedure.
Will it fit any 115–175 HP Evinrude or Johnson engine?
No. Horsepower alone does not confirm fitment. Match the engine brand, complete model designation, year, cooling-system configuration, and original part number with the information above.
Is this an OEM thermostat?
This is an aftermarket replacement. OEM and aftermarket numbers shown in this listing are provided as reference and interchange information; the product is not represented as an original equipment component.
What are common signs of a thermostat problem?
Possible symptoms include overheating, running cooler than expected, slow warm-up, or unstable temperature behavior. Diagnose the complete cooling system before replacing the thermostat.
Safety & Important Info
- Confirm fitment using the complete engine model, year, original thermostat, and all available part-number information.
- Never work on a hot engine or open the cooling system while it is pressurized.
- Use the engine manufacturer’s service manual for torque values, gasket requirements, installation orientation, and testing procedures.
- This is an aftermarket replacement component, not an original equipment manufacturer part.
- Professional installation is recommended if you are not experienced with marine outboard cooling systems.
About Sea Sierra
- Marine Replacement Parts — We supply replacement components for common marine service and repair applications.
- Fitment-Focused Listings — Product references and application information are provided to help customers compare parts before ordering.
- Practical Service Support — Always match the complete engine information and original component before installation.
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