Sierra 18-3549 | 120 degree Thermostat

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Fits Models: 6, 7, 8, 9.9 & 15 HP, Mercury/Mariner A197112 & Later, Mariner 6,8,9.9 (2 cyl.) A197112 Later, Sea Pro 10 D038000 Later, 15 (2 cyl.) B292414 Later, 18XD, 20XD, 25XD B1 14231 Later, 25 ( 2 cyl.) 25 Sea Pro B238464 Later, 30 (2 cyl.) G055314 Later, 45 Jet, 50, 55, 60 (3 cyl.) G290585 Later, Mercury Sea Pro 10 D038000 Later, 15 (2 cyl.) B292414 Later, 18XD, 20XD, 25XD B114231 Later, 25 ( 2 cyl.) 25 Sea Pro B238464 Later, 30 (2 cyl.) G055314 Later, 45 Jet, 50, 55, 60 (3 cyl.) G290585 LaterReplaces Mercury 14586, Mallory 9-43014 | 18-3549 Thermostat is designed for use in Mercury marine applications. It is interchangeable with GLM 13120, Mallory 9-43014, Mercury Marine 14586, and Sears 14586. It features a temperature rating of 120°F. Each Sierra product meets or exceeds the original equipment part it replaces. | Optimum engine temperature maximizes performance and efficiency. A failed thermostat can cause an engine to run at outside of its optimum temperature and can adversely affect performance and efficiency. The fix can be as simple as replacing the thermostat. This Sierra thermostat has a temperature rating of 120° and is compatible with many Mercury and Sear outboards. Sierra thermostats are engineered to meet or exceed Mercury and Sear specifications to give boaters and technicians confidence of an OEM fit and function. Key Features Thermostat meets or exceeds manufacturer specifications Temperature rating of 120° Compatible with many Mercury and Sears outboards; use the list below or our Engine Part Selector to confirm this thermostat is right for your engine 18-3549 Application Guide Application OEM Part Number GLM 13120 Mallory 9-43014 Mercury Marine 14586 Sears 14586 The Sierra Engine Parts Selector In addition to thermostats, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see our Engine Parts Selector, where you can search by engine make, serial number and model or year of manufacture. Show more