Cooling System
Keep your MerCruiser engine operating at the proper temperature with genuine Mercury MerCruiser Cooling System parts. Shop water pump kits, impellers, thermostats, circulating pumps, seawater pump components, housings, gaskets, seals, and other OEM replacement parts designed for Alpha, Bravo, and inboard MerCruiser applications. Genuine MerCruiser cooling system components are engineered for reliable performance, proper engine cooling, and long service life.
Not sure which cooling system parts fit your engine? Contact our team with your engine serial number for assistance confirming compatibility.
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Mercury Thermostat Kit, 140°F (MerCruiser V6 & V8) 807252T4
Mercury
MSRP: $62.99$53.49Mercury Thermostat Kit, 140°F (MerCruiser V6 & V8) 807252T4 is a genuine Mercury/Quicksilver OEM replacement kit designed for compatible MerCruiser sterndrive and inboard engines with standard cooling systems. A properly functioning thermostat...807252T4- SKU:
- 807252T4
- Availability:
- Usually Ships within 24hours
- Weight:
- 4.00 Ounces
MSRP: $62.99$53.49 -
Mercury Thermostat Kit (120 Degrees) OEM 14586A3
Mercury
MSRP: $60.99$51.84The Mercury Thermostat Kit (120 Degrees) 14586A3 is a genuine Mercury OEM replacement thermostat kit designed for select Mercury and MerCruiser applications. This 120-degree thermostat kit helps regulate engine operating temperature and maintain proper...14586A3- SKU:
- 14586A3
- Availability:
- Usually Ships within 24hours
- Weight:
- 1.01 Ounces
MSRP: $60.99$51.84 -
Mercury Thermostat Kit, 140°F (MerCruiser V6 & V8) 807252Q4
Quicksilver
MSRP: $57.49$48.87Mercury Thermostat Kit, 140°F (MerCruiser V6 & V8) 807252Q4 is a genuine Mercury/Quicksilver OEM replacement thermostat designed for compatible MerCruiser V6 and V8 engines with standard cooling systems. A properly functioning thermostat helps...807252Q4- SKU:
- 807252Q4
- Availability:
- Usually Ships within 24hours
- Weight:
- 4.00 Ounces
MSRP: $57.49$48.87 -
Mercury Water Pump Impeller Kit, V6 & V8 Brass Sea Water Pump 8M0137219
Mercury
MSRP: $55.49$47.17Mercury Water Pump Impeller Kit, V6 & V8 Brass Sea Water Pump 8M0137219 is a genuine Mercury/Quicksilver OEM service kit designed for compatible MerCruiser V6 and V8 engines equipped with a brass sea water pump. Replacing worn water pump components...8M0137219- SKU:
- 8M0137219
- Availability:
- Usually Ships within 24hours
- Weight:
- 4.64 Ounces
MSRP: $55.49$47.17 -
Mercury Water Temperature Sender (1/8-Inch 27 NPT Threads) 12415
Mercury
MSRP: $54.49$46.32The Mercury Water Temperature Sender (1/8-Inch 27 NPT Threads) 12415 is a genuine Mercury OEM replacement sender designed for select Mercury and MerCruiser applications. This water temperature sender features 1/8-inch 27 NPT threads and helps monitor...12415- SKU:
- 12415
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.50 Ounces
MSRP: $54.49$46.32 -
Mercury Water Pump Impeller Kit, V6 & V8 MerCruiser Sterndrive 8M0104229
Quicksilver
MSRP: $52.49$44.62Mercury Water Pump Impeller Kit, V6 & V8 MerCruiser Sterndrive 8M0104229 is a genuine Mercury/Quicksilver OEM service kit designed for compatible V6 and V8 MerCruiser sterndrives. Replacing the water pump impeller at the recommended service interval...8M0104229- SKU:
- 8M0104229
- Availability:
- Usually Ships within 24hours
- Weight:
- 3.68 Ounces
MSRP: $52.49$44.62 -
Mercury Thermostat Kit, 160°F (GM MerCruiser V6 & V8) 807252T5
Mercury
MSRP: $51.49$43.99Mercury Thermostat Kit, 160°F (GM MerCruiser V6 & V8) 807252T5 is a genuine Mercury/Quicksilver OEM replacement kit designed for compatible General Motors-based MerCruiser sterndrive and inboard engines with standard cooling systems. A properly...807252T5- SKU:
- 807252T5
- Availability:
- Usually Ships within 24hours
- Weight:
- 4.00 Ounces
MSRP: $51.49$43.99 -
Quicksilver Distributor Cap & Rotor Kit (Thunderbolt IV & V HEI Ignition) 815407Q5
Quicksilver
MSRP: $48.99$41.64Maintain reliable ignition performance with the Quicksilver Distributor Cap & Rotor Kit 815407Q5. This genuine OEM replacement kit is designed for General Motors-based MerCruiser engines equipped with Thunderbolt IV and Thunderbolt V HEI ignition...815407Q5- SKU:
- 815407Q5
- Availability:
- Usually Ships within 24hours
- Weight:
- 10.00 Ounces
MSRP: $48.99$41.64 -
Mercury Water Separating Fuel Filter Disc (Gen III Fuel Cooler) 8M0204703
Quicksilver
MSRP: $47.49$40.37Mercury/Quicksilver Water Separating Fuel Filter Disc (Gen III Fuel Cooler) 8M0204703 OEM Quicksilver water separating fuel filter disc designed for 2004 and newer Mercury and MerCruiser sterndrive and inboard engines equipped with Gen III fuel cooler...8M0204703- SKU:
- 8M0204703
- Availability:
- Usually Ships within 24hours
- Weight:
- 1.04 Ounces
MSRP: $47.49$40.37 -
Mercury Thermostat Kit, 160°F (MerCruiser V6 & V8) 807252Q5
Quicksilver
MSRP: $46.99$39.94Mercury Thermostat Kit, 160°F (MerCruiser V6 & V8) 807252Q5 is a genuine Mercury/Quicksilver OEM replacement thermostat designed for compatible GM-based MerCruiser V6 and V8 engines with standard cooling systems. A properly functioning thermostat...807252Q5- SKU:
- 807252Q5
- Availability:
- Usually Ships within 24hours
- Weight:
- 4.00 Ounces
MSRP: $46.99$39.94 -
Mercury Thermostat Kit, 160°F (GM MerCruiser V6 & V8 Closed Cooling) 99155T1
Quicksilver
MSRP: $42.49$36.12Mercury Thermostat Kit, 160°F (GM MerCruiser V6 & V8 Closed Cooling) 99155T1 is a genuine Mercury/Quicksilver OEM replacement kit designed for compatible General Motors-based MerCruiser V6 and V8 engines with closed cooling systems. A properly...99155T1- SKU:
- 99155T1
- Availability:
- Usually Ships within 24hours
- Weight:
- 3.68 Ounces
MSRP: $42.49$36.12 -
Quicksilver Water Shutter (MerCruiser Sterndrives) 60930
Quicksilver
MSRP: $42.49$36.12The Quicksilver Water Shutter 60930 is a genuine Quicksilver OEM replacement exhaust water shutter, also known as a water flapper, designed for numerous MerCruiser sterndrive applications. It helps prevent water from flowing back into the engine through...60930- SKU:
- 60930
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.13 Ounces
MSRP: $42.49$36.12 -
Mercury Thermostat, 160°F (GM MerCruiser V6 & V8 Closed Cooling) 991551
Quicksilver
MSRP: $41.49$35.27Mercury Thermostat, 160°F (GM MerCruiser V6 & V8 Closed Cooling) 991551 is a genuine Mercury/Quicksilver OEM replacement thermostat designed for compatible General Motors-based MerCruiser V6 and V8 engines with closed cooling systems. A properly...991551- SKU:
- 991551
- Availability:
- Usually Ships within 24hours
- Weight:
- 3.04 Ounces
MSRP: $41.49$35.27 -
Mercury Thermostat, 160°F (MerCruiser 496 Magnum, 496 HO & 8.1L) 8M0076464
Quicksilver
MSRP: $40.99$34.84Mercury Thermostat, 160°F (MerCruiser 496 Magnum, 496 HO & 8.1L) 8M0076464 is a genuine Mercury/Quicksilver OEM replacement thermostat designed for compatible MerCruiser sterndrive and inboard engines. A properly functioning thermostat helps...8M0076464- SKU:
- 8M0076464
- Availability:
- Usually Ships within 24hours
- Weight:
- 2.88 Ounces
MSRP: $40.99$34.84 -
Mercury Thermostat Kit, 140°F (Early MerCruiser V8 & High Performance) 807252T3
Mercury
MSRP: $39.99$33.99Mercury Thermostat Kit, 140°F (Early MerCruiser V8 & High Performance) 807252T3 is a genuine Mercury/Quicksilver OEM replacement kit designed for compatible MerCruiser sterndrive and inboard engines with standard cooling systems. A properly...807252T3- SKU:
- 807252T3
- Availability:
- Usually Ships within 24hours
- Weight:
- 3.74 Ounces
MSRP: $39.99$33.99 -
Mercury THERMOSTAT OEM 8M0045990
Mercury
MSRP: $39.49$33.57Genuine Mercury THERMOSTAT, part number 8M0045990. Designed for use with compatible applications.8M0045990- SKU:
- 8M0045990
- Availability:
- Usually Ships within 24hours
- Weight:
- 2.96 Ounces
MSRP: $39.49$33.57 -
Mercury Thermostat (140°F MerCruiser 120, 140 & 165 Engines) 59078
Quicksilver
MSRP: $39.49$33.57The Quicksilver Thermostat (140°F MerCruiser 120, 140 & 165 Engines) 59078 is a genuine Quicksilver OEM replacement thermostat designed to help maintain proper operating temperature for select MerCruiser sterndrive and inboard engines. Compatible...59078- SKU:
- 59078
- Availability:
- Usually Ships within 24hours
- Weight:
- 1.38 Ounces
MSRP: $39.49$33.57 -
Mercury Thermostat Kit, 140°F (MerCruiser 4 & 6-Cylinder) 59078Q3
Mercury
MSRP: $38.49$32.72Mercury Thermostat Kit, 140°F (MerCruiser 4 & 6-Cylinder) 59078Q3 is a genuine Mercury/Quicksilver OEM replacement kit designed for older General Motors-based MerCruiser inline 4-cylinder and 6-cylinder engines. A properly functioning thermostat...59078Q3- SKU:
- 59078Q3
- Availability:
- Usually Ships within 24hours
- Weight:
- 2.24 Ounces
MSRP: $38.49$32.72 -
Mercury THERMOSTAT KIT OEM 807252Q3
Mercury
MSRP: $36.49$31.02Genuine Mercury THERMOSTAT KIT, part number 807252Q3. Designed for use with compatible applications.807252Q3- SKU:
- 807252Q3
- Availability:
- Usually Ships within 24hours
- Weight:
- 3.50 Ounces
MSRP: $36.49$31.02 -
Mercury Thermostat, 160°F (GM MerCruiser w/ Standard Cooling) 8M0109441
Quicksilver
MSRP: $34.49$29.32Mercury Thermostat, 160°F (GM MerCruiser w/ Standard Cooling) 8M0109441 is a genuine Mercury/Quicksilver OEM replacement thermostat designed for compatible General Motors-based MerCruiser engines with standard cooling systems. A properly functioning...8M0109441- SKU:
- 8M0109441
- Availability:
- Usually Ships within 24hours
- Weight:
- 2.00 Ounces
MSRP: $34.49$29.32
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