Description
SIERRA Johnson/Evinrude Outboard Thermostat – 18-3643
The SIERRA Johnson/Evinrude Outboard Thermostat – 18-3643 is a marine cooling-system replacement component designed for Johnson/Evinrude 6-8 HP (1990), 9.9/15 HP (1990-92), 40/48/50 HP (1990-94), and 45/55 HP (1992-94). It is a fit-specific service part; confirm the engine model, serial range, cooling configuration, and OEM interchange before installation.
- Designed for Johnson/Evinrude 6-8 HP (1990), 9.9/15 HP (1990-92), 40/48/50 HP (1990-94), and 45/55 HP (1992-94)
- 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
- Cross-references established OEM or aftermarket part numbers for fitment verification
Specifications
- Manufacturer: Sierra
- Part Number: 18-3643
- Product Type: Thermostat
- Application: Johnson/Evinrude 6-8 HP (1990), 9.9/15 HP (1990-92), 40/48/50 HP (1990-94), and 45/55 HP (1992-94)
- OEM / Aftermarket Interchange: Johnson/Evinrude 433379
- UPC: 808282375508
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