Sierra S18-3543 Johnson/Evinrude Outboard Cooling-System Thermostat

The Thermostat - 18-3543 is a marine cooling-system service component for the compatible applications listed below.

Product information

• Sierra Thermostat- 18-3543
• Temperature Rating: 143°F. E-tec thermostat
• 18-3673D - Thermostat Kit
• 18-3674D - Thermostat Kit
• 18-3673 - Thermostat Kit (V4 Crossflow)
• 18-3674 - Thermostat Kit (V6 Crossflow)
• Johnson/Evinrude Outboard
• 378065
• 393659
• 434841
• 437414
• 5005440
• 508626

Before ordering

Please compare the listed specifications and part number with your existing component. If you need help confirming compatibility, contact Jet Ski Parts Warehouse with your make, model, year and engine details.