Sierra 18-3677 Marine Thermostat Kit 160 Degree

The Sierra 18-3677 is a complete 160-degree thermostat kit designed for OMC and Volvo Penta stern drive marine engines. This high-quality replacement kit features a stainless steel and brass bi-metal thermostat construction that provides reliable temperature regulation for optimal engine cooling performance.

Kit Includes:

• 160-degree thermostat (Sierra 18-3554)
• Thermostat gasket (Sierra 18-2917 or 18-0398)
• O-ring seal (Sierra 18-7170)

Key Features:

• 160°F opening temperature for precise cooling control
• High-grade stainless steel and brass bi-metal construction
• Complete kit with all necessary gaskets and seals
• Direct OEM replacement quality
• Engineered for harsh marine environments

OEM Cross-Reference:

• Volvo Penta: 3856961, 3853983
• OMC: 3856961, 3852071, 3852111
• Mallory: 9-43028

Sierra Marine products are engineered to meet or exceed OEM specifications, providing dependable performance and long service life. This thermostat kit ensures proper engine operating temperature, protecting your marine engine from overheating while maintaining efficient fuel consumption and performance.