Description
SIERRA 140°F Yamaha F75/F90 Outboard Thermostat – 18-3641
The SIERRA 140°F Yamaha F75/F90 Outboard Thermostat – 18-3641 is a marine cooling-system replacement component designed for Yamaha F75B, F90B and VF90A outboards in specified model years. Its 140°F (60°C) operating rating helps the engine reach and maintain the intended cooling-system temperature. It is a fit-specific service part; confirm the engine model, serial range, cooling configuration, and OEM interchange before installation.
- Designed for Yamaha F75B, F90B and VF90A outboards in specified model years
- Thermostat temperature rating: 140°F (60°C)
- Helps regulate coolant flow as the engine reaches operating temperature
- Direct-fit replacement for the specified marine engine applications
- Suitable for preventive maintenance or replacement of a sticking/corroded thermostat
Specifications
- Manufacturer: Sierra
- Part Number: 18-3641
- Product Type: Thermostat
- Application: Yamaha F75B, F90B and VF90A outboards in specified model years
- Temperature Rating: 140°F (60°C)
- OEM / Aftermarket Interchange: Yamaha 6FP-12411-00-00
- UPC: 808282375461

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