Part of: Sierra Thermostat Cover Gasket for Yamaha Outboard
Other options in this family: Sierra 18-3675 Sierra 18-0844 Sierra 18-2844-9 Sierra 118-2552-9 Sierra 118-3675
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$3.70
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The Sierra 18-0323 is a replacement thermostat cover gasket engineered for Mercury Marine outboard motors. Designed to seal the thermostat housing in the engine's cooling system, this gasket helps maintain proper coolant flow and operating temperature for reliable on-water performance.
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