Sierra 18-3643 Thermostat for Johnson/Evinrude Outboard Motors

The Sierra 18-3643 is a high-quality replacement thermostat designed specifically for Johnson and Evinrude outboard motors. This precision-engineered thermostat regulates engine temperature by controlling coolant flow, ensuring your outboard operates at optimal temperature for maximum performance and longevity.

Key Features:

• Direct OEM replacement for Johnson/Evinrude part number 433379
• Manufactured to meet or exceed original equipment specifications
• Precision calibrated for accurate temperature control
• Durable construction for reliable marine environment performance
• Fits multiple horsepower ranges from 6HP to 55HP

Compatibility:

• Johnson/Evinrude 6-8HP (1990)
• Johnson/Evinrude 9.9/15HP (1990-1992)
• Johnson/Evinrude 40/48/50HP (1990-1994)
• Johnson/Evinrude 45/55HP (1992-1994)

Sierra Marine is a trusted name in aftermarket marine engine parts, offering products that meet rigorous quality standards backed by comprehensive warranty coverage. This thermostat helps maintain proper engine temperature, preventing overheating and ensuring efficient fuel combustion.