The Sierra 18-3549 Thermostat is designed to regulate engine operating temperature by controlling cooling-water flow in Mercury applications. It replaces Mercury 14586.
Suits Mercury 2-stroke and 4-stroke outboards including 6-30hp 2-stroke outboards, 40-60hp 4-stroke outboards, and 65-90hp 2-stroke outboards.
Temperature Rating: 120°F
Use with:
Thermostat Kit 18-3569Â
Thermostat Kit 18-43052Â
Need help with fitment? Contact us with your engine model and serial number and we'll help check suitability.
What is Sierra 18-3549?
Sierra 18-3549 is an aftermarket thermostat for Mercury Outboard applications.
Which part numbers cross-reference Sierra 18-3549?
This listing cross-references Mercury 14586 and GLM 13120. See the Cross References & Alternative Products section above for linked alternatives where available.
How can I check whether Sierra 18-3549 fits my Mercury Outboard application?
Contact us with your engine model and serial number and we'll help check suitability.
Australian Dollars
