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- Sierra 18-3549 120°F Outboard Thermostat for Mercury Mariner OEM Replacement
Sierra 18-3549 120°F Outboard Thermostat for Mercury Mariner OEM Replacement
Product Code: SIE18-3549
The Sierra 18-3549 thermostat is designed for Mercury and Mariner outboard engines. It maintains a precise 120°F engine temperature for reliable performance.
- Replaces Mercury OEM part 14586
- Fits 6, 9.9, and 15 HP outboard engines
- Ensures accurate engine cooling control
- Durable and easy to install
Ideal for replacing worn or faulty thermostats and keeping your engine running smoothly.