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      Mercruiser Cooling System Product Listings

      • Mercury - Mercruiser 46-77177A-3 Water Pump Kit Image
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        $133.19
        $110.99

        Quicksilver 46-77177A-3 Water Pump Kit Quicksilver 77177A3 Water Pump Repair Kit is a comprehensive replacement kit designed to restore the cooling system on select Mercury and Mariner 30-70 HP...

      • Quicksilver 47-85089Q-4 Water Pump Repair Kit Image
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        $50.99
        $42.49

        Quicksilver 47-85089Q-4 Water Pump Repair Kit Quicksilver 85089Q4 Water Pump Repair Kit is a complete replacement kit designed for select Mercury and Mariner 15-25 HP 2-Stroke outboards. This kit...

      • Sierra 18-0891-9 Water Pump Mounting Gasket (2Pk) Replaces 27-34897
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        $6.49
        $5.39

        Water Circulating Pump Mounting Gasket for Mercruiser, Volvo, OMC (2 Pack) For GM 4.3L, 5.0L & 5.8L Engines. Replaces: Mercruiser - 27-34897 Volvo & OMC - 3852477 OMC - 909835

      • Sierra 18-15290 V-Belt Replaces 57-13457Q
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        $24.99
        $17.99

        Sierra 18-15290 Mercruiser Water Pump V-Belt Sierra high-quality engine parts are designed to meet OEM specifications. Sierra V-Belts are designed to meet or exceed OEM requirements. Their low...

      • Mercury OEM Mercruiser Alpha One Gen II Water Pump Repair Kit
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        $222.59
        $185.49

        Mercury OEM Mercruiser Alpha One Gen II Water Pump Repair Kit 817275K05 This genuine OEM MerCruiser water pump rebuild kit is for use with Alpha One Gen II Sterndrives. By repairing and maintaining...

      • Sierra 18-1977-1 MerCruiser V6/V8 Thermostat Housing
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        $92.89
        $66.89

        Sierra 18-1977-1 Mercruiser Thermostat Housing Sierra high-quality engine parts are designed to meet OEM specifications. Fits MCM/MIE GM V-6 & V-8 (305 & 350 cid) engines & Hi-Perf 454, 502 & 540...

      • Sierra 18-4009 Manifold End Plate Replaces 60252A2
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        $89.29
        $64.29

        Sierra 18-4009 Manifold End Plate for Mercruiser & OMC Sterndrives Sierra high-quality engine parts are designed to meet OEM specifications. For Use With: 18-1950-1 Manifold 18-1951-1...

      • Sierra 18-3667 Thermostat Kit
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        $32.29
        $23.19

        Thermostat Kit for Mercruiser Engines 160 degree Includes thermostat (18-2555) and gasket (18-3555) Replaces: OEM 27-89656-1 (Gasket) and 99155A-1 (Thermostat)

      • Sierra 18-3550 Thermostat Replaces 59078
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        $38.29
        $27.59

        Sierra 18-3550 Mercruiser 140 Degree Thermostat Sierra high-quality engine parts are designed to meet OEM specifications. For use on Mercruiser Stern Drives and Chrysler/Force/US Marine engines...

      • Sierra 18-3584-1 Circulating Water Pump
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        $266.29
        $191.69

        Sierra 18-3584-1 Circulating Water Pump Sierra 18-3584-1 is a replacement Circulating Water Pump for use in Ford V-8 engines. Like all Sierra aftermarket parts, this pump is manufactured to meet or...

      • Sierra 18-36001 MerCruiser V6/V8 Sea Water Pump
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        $590.29
        $424.99

        Sierra 18-36001 Sea Water Pump Fits: V6&V8 engines with V-belt and 1 piece pump Interchangeable With: MerCruiser Stern Drive 46-807151A12 46-72774A50

      • Sierra 18-0721 Open Elbow Gasket
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        $93.19
        $67.09

        Sierra 18-0721 Mercruiser Open Exhaust Elbow Gasket Sierra high-quality engine parts are designed to meet OEM specifications. Sierra Mercruiser dry joint open riser gasket. This full flow gasket...

      • Quicksilver OEM MerCruiser 4.3L/5.0L/5.7L/6.2L 2002 & Newer Exhaust Elbow Gasket
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        $68.39
        $56.99

        Quicksilver OEM MerCruiser V6/V8 GM 2002 & Newer Dry Joint Open Exhaust Elbow Gasket 27-864547A02 Full-flow exhaust elbow gasket for GM-based MerCruiser V6 and V8 sterndrive and inboard engines from...

      • Shutter Asy-Water, Mercury - Mercruiser 807166A-2 Image
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        $103.19
        $85.99

        Quicksilver 807166A2 Exhaust Water Shutter Kit For MerCruiser 4.3L Engines With 1-Piece Exhaust Manifolds Quicksilver 807166A2 Exhaust Water Shutter Kit is designed for select MerCruiser sterndrive...

      • Sierra 18-3309 Water Pump Kit
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        $52.79
        $37.99

        Sierra 18-3309 Mercruiser Water Pump Kit for Bravo, TRS Sierra high-quality engine parts are designed to meet OEM specifications. For 2 piece pumps used on Mercruiser Bravo and TRS Drives. Kit...

      • Quicksilver 807252Q4 Thermostat Kit Image
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        $58.79
        $48.99

        Quicksilver 807252Q4 Thermostat Kit Quicksilver 807252Q4 Thermostat is a 140°F replacement thermostat designed for select GM V6 and V8 MerCruiser engines with standard cooling systems. Maintaining...

      • EMP 46-13159 MerCruiser Water Pump Kit
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        $105.60
        $88.00

        EMP 46-13159 MerCruiser Water Pump Kit This EMP replacement water pump kit is for use with MerCruiser engines. Water Pump Application Information: For MercCruiser V8 200-575HP engines, Alpha One,...

      • Sierra 18-15370 V-Belt
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        $31.59
        $22.69

        Sierra 18-15370 Power Steering V-BELT for Mercruiser & OMC High strength synthetic cords resist shockload failure. Their low stretch properties assure uniform performance over the life of the belt...

      • EMP 75-03222 MerCruiser Thermostat Kit
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        $37.92
        $31.60

        EMP 75-03222 MerCruiser Thermostat Kit This 160° Thermostat Kit is intended for use on MerCruiser engines and meets all OEM requirements. Thermostat Kit Application: For 1983 & later GM engines...

      Mercruiser OEM Engine Parts Finder

      MerCruiser Cooling Systems

      The cooling system of your MerCruiser engine keeps it from overheating and ensures that it’s operating at its best. It’s important to keep the entire cooling system updated and maintained, since its health is at the forefront of your engine’s overall performance. If you need parts for your MerCruiser cooling system, simply call Wholesale Marine. We will always have just what you need.

      Keep it Cool with MerCruiser Cooling Systems

      A boat’s engine, such as your MerCruiser sterndrive or inboard engine, is a delicate piece of machinery full of moving parts that each need special attention. In times past, a boat's engine was simply cooled by pulling raw water straight out of the source the vessel was floating in, running that through the engine, and out the other end. This left an engine with several issues, such as saltwater corrosion, large debris, and lack of efficiency. Further still, this sort of cooling system once upon a time only ran at 145 to 150 degrees, as regulated by a thermostat, to avoid saltwater crystallization. This is an issue due to a number of reasons, one of which was the amount of build-up that would occur at such cool temperatures.

      Today, we have engines full of checks and balances to get our MerCruiser sterndrive or inboard at max power without overheating. And Wholesale Marine has everything you need to run preventative maintenance on your vessel and to upgrade your older parts. Water pumps, impellers, thermostats, gaskets, circulation pumps, shutter and exhaust tubes, exhaust manifolds, hoses, belts, and more are all here to fit MerCruiser cooling systems. Ready to get started? Check out our easy-to-use Parts Selection tool to quickly get you exactly what you are searching for. We stock OEM and aftermarket Mercury outboard parts and Mercury sterndrive parts for less!

      For keeping that sterndrive, inboard, or tow sport engine cool come rain or shine, you can depend on Wholesale Marine to provide high quality Mercury outboard parts and Mercury sterndrive parts from the top brands in the industry. Our same day shipping, free shipping on orders over $99, and price match guarantees give you quality parts in a timely and economical manner. Review our selection today and give us a call with your questions at (877) 388-2628. Be sure to ask about our Wholesale Rewards Program for additional discounts on everything you need to keep your boat in top shape for your next adventure!