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Mercury and Mariner Outboard Engine Cooling Parts 

At OBParts.com, browse a comprehensive selection of cooling system components for Mercury and Mariner outboards. Our lineup includes premium water pump kits, impellers, pump housings, and thermostats engineered to maintain optimal engine temperature and performance. Whether you're performing routine maintenance or a complete rebuild, our durable, OEM-quality parts ensure reliable cooling and long-lasting operation. Shop today for trusted marine engine parts backed by expert support and fast shipping.

 

HP Year Thermostat Water Pump Kit
50-60 HP 3 Cyl 1991-1997 JE-T41 (143°) / ME-T86 (120°)  
70-90 HP 3 Cyl 1987-2006 JE-T41 (143°) / ME-T86 (120°) FM-302
100-125 HP 4 Cyl 1988-2006 JE-T41 (143°) / ME-T86 (120°) FM-302
135/150 HP V6 2.0L 1984-2001 JE-T41 (143°) ME-618
150XR4 175/200 HP V6 2.4L 1983-1990 JE-T41 (143°) ME-618
150 EFI-200 HP V6 2.5L 1991-2005 JE-T41 (143°) ME-618
225/250 HP V6 3.0L 1994-2001 JE-T41 (143°) FM-302

 

Upgrade or maintain your Mercury & Mariner outboard with precision-engineered cooling system components from OBParts. Explore water pump kits, impellers, pump housings, thermostats, and OEM-grade parts—all designed to ensure optimal engine performance and reliable cooling on every voyage.