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.
