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Sierra Marine Thermostats

5.0 out of 5 stars 5 Customer Reviews

Sierra Marine thermostats are exact replacements made of the same high-quality materials as your factory original to provide accurate fit and function for reliable performance. They are available in a wide range of make/model and engine applications—order the thermostat model suited to your needs.

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Sierra Marine Thermostats 18-3673

Thermostat, Gaskets, Springs, Outboard, Johnson/Evinrude, Kit

Part Number: RRA-18-3673

Not Yet Reviewed

Estimated Ship Date: Dec 8, 2025 if ordered today

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Estimated Ship Date: Dec 8, 2025 if ordered today

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