Marine Thermostat Replacement for Volvo Penta Sterndrive Raw-Water Cooling – 150°F, Replaces 3587597
Marine Thermostat Replacement for Volvo Penta Sterndrive Raw-Water Cooling – 150°F, Replaces 3587597 is backordered and will ship as soon as it is back in stock.
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Marine Thermostat Replacement for Volvo Penta Sterndrive Raw-Water ...
Marine Thermostat Replacement for Volvo Penta Sterndrive Raw-Water Cooling – 150°F, Replaces 3587597 is backordered and will ship as soon as it is back in stock.
Product Details
This marine thermostat replacement is intended for compatible Volvo Penta sterndrive applications using a raw-water cooling system. It is rated to begin opening at approximately 150°F (66°C) and is listed as a replacement for Volvo Penta reference 3587597.
Catalog references identify the corresponding aftermarket thermostat as Sierra 18-3615. This listing is for the thermostat replacement itself; a gasket, O-ring, housing, fasteners, or other service components are not confirmed as included unless they are shown in the package received.
- 150°F (66°C) thermostat opening rating.
- For compatible Volvo Penta sterndrive applications with raw-water cooling.
- Aftermarket replacement for the specified manufacturer reference.
- Confirm the original thermostat, cooling-system type, dimensions, and application before ordering.
Part Number References
Use the references below only as identification aids. Part-number appearance alone does not confirm fitment for every engine model or year.
| Reference Type | Part Number | Description |
|---|---|---|
| Volvo Penta reference | 3587597 | Reference replaced by the listed thermostat |
| Aftermarket reference | 18-3615 | Sierra 150°F raw-water thermostat |
Application and Compatibility
The available catalog evidence identifies this thermostat in the Volvo Penta cooling-system section and describes it as a raw-water thermostat. It should not be treated as a universal replacement for freshwater or closed-cooling applications.
| Brand | Application Type | Cooling System | Opening Rating | Reference | Fitment Notes |
|---|---|---|---|---|---|
| Volvo Penta | Compatible sterndrive applications | Raw-water cooled | 150°F (66°C) | 3587597 | Verify the complete engine model, year, serial number, and original thermostat before purchase. |
Technical Specifications
- Product Type
- Marine thermostat replacement
- Cooling System
- Raw-water cooling applications
- Opening Temperature
- 150°F (66°C)
- Application
- Compatible Volvo Penta sterndrive engines
- Manufacturer Reference
- 3587597
- Aftermarket Reference
- Sierra 18-3615
- Package Type
- Thermostat replacement; included service components are not confirmed
What’s in the Box
- 1 x Marine thermostat replacement
Important: A housing gasket, O-ring, seal, or other installation hardware is not confirmed as included. Inspect the product packaging and compare it with the parts required for your specific service.
Installation Notes
- Allow the engine to cool completely before beginning work. Follow the engine manufacturer's safety instructions and disconnect the battery if required by the service procedure.
- Confirm that the engine uses the raw-water cooling configuration and that the replacement thermostat matches the original part.
- Locate the thermostat housing and place a suitable drain pan below the work area.
- Remove the housing cover according to the engine manufacturer's procedure, noting the thermostat orientation before removal.
- Remove the old thermostat and clean the mating surfaces without damaging the housing.
- Install the replacement thermostat in the same orientation as the original. Use a new seal or gasket only if required by the engine service procedure and purchased separately.
- Reinstall the housing cover and tighten fasteners to the manufacturer's specified torque.
- Run the engine according to the service instructions, check for leaks, and confirm stable operating temperature before returning the boat to service.
Troubleshooting & FAQ
Is this thermostat for raw-water or freshwater cooling?
This replacement is identified for raw-water cooling applications. Do not use it in a freshwater or closed-cooling system unless the engine manufacturer's parts information specifically confirms that application.
What is the thermostat opening temperature?
The listed opening rating is 150°F (66°C).
Does the package include a gasket or O-ring?
The available product evidence confirms the thermostat replacement but does not confirm a gasket, O-ring, housing, or other service parts in the package. Verify the package contents before installation and obtain any required seals separately.
How do I confirm fitment?
Compare the original thermostat and reference number, then verify the complete Volvo Penta engine model, year, serial number, cooling-system configuration, and thermostat rating. A 3587597 reference by itself is not sufficient to confirm every application.
What symptoms may indicate a thermostat problem?
Possible symptoms include overheating, an engine that runs below its expected temperature, unstable temperature readings, restricted cooling flow, or leakage near the thermostat housing. Diagnose the complete cooling system before replacing parts.
Is this an OEM component?
This listing is for an aftermarket replacement and is not represented as an original Volvo Penta component.
What installation support is recommended?
Use the engine manufacturer's service procedure and torque specifications. Professional installation is recommended when the cooling-system configuration or thermostat application is uncertain.
Safety & Important Information
- Never open a hot cooling system. Allow the engine to cool before removing the thermostat housing.
- Verify raw-water versus freshwater cooling before ordering.
- Compare the replacement with the original thermostat and confirm the complete engine application.
- Do not rely on a part number alone when model, year, serial number, or cooling-system details are unknown.
- This is an aftermarket replacement, not an OEM component.
About Sea Sierra
- Marine Replacement Parts — Parts selected for service and replacement applications in marine systems.
- Application-Focused Information — Review the cooling-system type and complete engine details before ordering.
- Support When Needed — Contact support with your order information and engine application details if fitment assistance is required.
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