Thermostats for Outboard Engines – Regulate Engine Temperature
Thermostats for Outboard Engines – Regulate Engine Temperature
The thermostat is a crucial part of your outboard’s cooling system, ensuring the engine quickly reaches optimal operating temperature. A faulty thermostat can cause overheating or a too-cold engine, affecting performance and engine life. In our thermostats for outboard engines category, you’ll find OEM and aftermarket parts for brands like Suzuki, Yamaha, Mercury, Honda, Tohatsu, and Evinrude.
Our thermostats are made from high-quality, marine-grade materials that withstand heavy use. During maintenance, the thermostat is often replaced together with the impeller, impeller housing, and gaskets to ensure a fully functional cooling system.
Thermostats for all major outboard brands
High-quality, marine-grade materials
Regulates engine temperature for optimal performance
Suitable for both 2-stroke and 4-stroke engines
Replace the thermostat according to manufacturer recommendations or at the first sign of malfunction to avoid overheating and engine issues.
Thermostat housing, 60°C. The additional seals, gaskets, clamps and attaching hardware sold separately. See your owner's manual or service manual for more information. 135‑175hp L4, 200‑400hp L6, and 400R L6 FourStroke outboards.
Includes thermostat and housing that fits Mercury 75-90-115 HP FOURSTROKE 1B366823 & up, 75-90-115/115 PRO XS HP FOURSTROKE 2B094996 & up, 150 EFI FOURSTROKE 1B905505 & up
Includes 49°C degree thermostat and gaskets. Fits various Mercury/Mariner 6‑25 hp. 2 cycle outboards. See application chart for specific engine models.
Includes 120 degree thermostat, thermostat gasket, washer and cover gasket. Fits various Mercury/Mariner 70‑125 hp. 2 cycle outboards (1987 and Newer). See application chart for specific engine models.
Includes 43°C degree thermostat and gaskets. Fits various Mercury / Mariner 40/50/55/60 hp. 2 cycle 3-cyl outboards. See application chart for specific engine models.