72°C/162°F Thermostat for Honda BF25–BF130 and Nissan/Tohatsu BFT115/BFT130/BFT150 Outboards

Product Details

This replacement 72°C/162°F thermostat is designed to help regulate operating temperature in selected Honda Marine outboard motors and Nissan/Tohatsu Marine outboards. The company fitment data covers specified Honda BF25 through BF130 models and Nissan/Tohatsu BFT115A, BFT130A, and BFT150A models.

The thermostat is listed for a 72°C (162°F) operating temperature. It is an aftermarket replacement for the manufacturer and aftermarket references shown below; always verify the complete engine model and part number before ordering.

• 72°C/162°F thermostat for selected marine outboard applications.
• Applicable to listed Honda BF and Nissan/Tohatsu BFT models.
• Single thermostat supplied; this listing is not a complete thermostat kit.

Part Number References

Use these references to compare the thermostat with the part removed from your engine. Reference numbers do not replace model and serial-number verification.

Engine & Model Compatibility

The following applications are taken from the company fitment records for this product. Year, serial-number, shaft-length, and stroke conditions are not specified in the available company data, so confirm those details with the engine identification plate and service manual before installation.

Technical Specifications

Product Type

Thermostat

Operating Temperature

72°C/162°F

Product Configuration

Single thermostat

Material

Not specified

Housing Color

Not specified

Installation

Replacement installation after confirming model and part-number compatibility

What's in the Box

• 1 x 72°C/162°F thermostat

A housing gasket and other installation hardware are not identified as included. Check the original assembly and service manual to determine whether a replacement gasket is required.

Installation Notes

1. Allow the engine to cool completely before beginning work.
2. Disconnect the battery and follow the engine manufacturer's safety procedures.
3. Locate the thermostat housing according to the service manual for the specific engine model.
4. Remove the housing cover and note the original thermostat orientation.
5. Remove the old thermostat and inspect the housing and sealing surfaces.
6. Clean the mating surfaces without damaging them.
7. Install the replacement thermostat in the correct orientation.
8. Replace the housing gasket if required by the service manual or if the original gasket is damaged.
9. Reinstall the housing cover and tighten fasteners to the manufacturer's specified torque.
10. Restore the cooling system as required, check for leaks, and confirm proper operating temperature before returning the boat to service.

Troubleshooting & FAQ

Safety & Important Information

• Verify the complete engine model, year or serial-number requirement, and reference number before purchase.
• Compare the replacement thermostat with the original part before installation.
• Do not operate the engine if the cooling system leaks or if the engine temperature is abnormal.
• Professional installation is recommended when the correct procedure or torque specifications are unknown.

About Sea Sierra

• Marine Replacement Parts — Replacement components for selected outboard maintenance and repair applications.
• Fitment-Focused Listings — Verify the exact model and reference number before ordering.
• Customer Support — Contact support if you need help comparing the part with your engine application.