Cooling Systems

Protect your inboard engine and keep it running cool with high-quality boat cooling system parts from WaterSkis.com. Whether you're replacing a raw water pump, upgrading a water hose, or servicing a complete water cooling system, we have the parts you need for Mastercraft, Supra, and Moomba boats.

Our selection includes OEM and trusted aftermarket components like impellers, thermostats, circulating pumps, and raw water pump kits—all essential for keeping your engine from overheating while pulling skiers, wakeboarders, or surfers. Not sure what fits your boat? Use our Boat Part Lookup Tool to match the correct parts to your model by year and brand.

With performance-driven options built for durability and compatibility, WaterSkis.com helps you tackle repairs with confidence and get back on the water faster—right where you belong.

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  • Indmar Circulating Water Pump GM LT1 Engines Circulating Water Pump GM LT1 Engines
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    Circulating Water Pump GM LT1 Engines

    £268.40
    Indmar MasterCraft LT-1 Circulating Water Pump Water circulating pump for Indmar Corvette LT1 marine engines used in MasterCraft boat. Fits Indmar LT-1 engines used in MasterCraft boats from 1993 to 1999. Comes with mounting gaskets. Please note: No...
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  • Circulating Water Pump for Indmar & PCM Ford Engines
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    Circulating Water Pump Ford Engines

    £246.03
    Circulating Water Pump for Indmar & PCM Ford Engines Fits all Ford based engines from Indmar, PCM, as well as others.  This new bi-rotational pump comes with a new mounting gasket to ensure a proper fit on your Ford 302 or 351 boat motor...
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  • Circulating Water Pump for GM 5.0 and 5.7 Engines
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    Circulating Water Pump GM Engines

    £183.40
    Circulating Water Pump for GM Engines This is a new circulating water pump for Indmar and PCM GM marine engines. This pump fits GM 5.0 and 5.7 Liter small block GM engines. This pump is Standard (LH) rotation. Comes with new mounting gaskets to ensure a...
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  • Ilmor Circulation Water Pump | PV08093
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    Ilmor Circulation Water Pump | PV08093

    Ilmor
    £268.40
    Ilmor Circulation Water Pump | PV08093 ***Don't forget to order the 2 gaskets needed when replacing this pump*** The Ilmor Circulation Water Pump (part # PV08093) is designed as a direct replacement for OEM Ilmor marine engines—particularly the 5...
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  • Indmar Cooler Kit Trans/Eng 495168
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    Indmar Cooler Kit Trans/Eng 495168

    Indmar
    £760.49
    Indmar Cooler Kit Trans/Eng 495168   Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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  • Hose formed "U" for Indmar LT1 Engines
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    Hose formed "U" for Indmar LT1 Engines

    £16.10
    Hose formed "U" for Indmar LT1 Engines Formed U hose for Corvette LT-1 engines from Indmar and MasterCraft boats. Fits Indmar LT1 engines- goes from the raw water pump to the thermostat housing. Midwest MasterCraft stocks MasterCraft boat parts. Please...
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  • Ilmor Jumper Lead, Coolant Temp | PL00373
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    Ilmor Jumper Lead, Coolant Temp | PL00373

    Ilmor
    £25.94
    Ilmor Jumper Lead, Coolant Temp | PL00373 This jumper lead is a direct replacement part for your coolant temperature sensor.  
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    Indmar Transmission Cooler 9 x 1-1/4"

    Indmar
    £185.19
    Indmar Transmission Cooler 9 x 1-1/4" Indmar Transmission Cooler 9 x 1-1/4" Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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At WaterSkis.com, we’re here to make sure your boat’s cooling system is ready for every session. From raw water pumps to water hoses and fittings, we carry essential parts for Mastercraft, Supra, and Moomba boats, all backed by expert support and fast shipping.

Need help finding the right part? Use our Boat Part Lookup Tool for precise fitment. You can also explore related categories like Engine Parts, Belts & Pulleys, and Exhaust Components to complete your engine service the right way.