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      Mercruiser Cooling System Product Listings

      • Sierra 18-1989 MerCruiser V8 Thermostat Housing
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        $358.29
        $257.99

        Sierra 18-1989 MerCruiser V8 Thermostat Housing Features: Material: Stainless Steel Fits: MCM/MIE GM V-8 (454 & 502 cid) engines Special Order est. 10 Days Interchangeable...

      • Sierra 18-2770 Exhaust Tube
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        $110.29
        $79.39

        Sierra 18-2770 Exhaust Tube Sierra replacement exhaust tube for use on Mercruiser I/O Engines. Interchangeable with: Mallory 9-72804 Mercruiser Stern...

      • Sierra 18-0183-1 Exhaust Manifold Gasket
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        $18.79
        $15.89

        Sierra 18-0183-1 Exhaust Manifold Gasket for Mercruiser, OMC Sierra Exhaust Manifold Gasket for use on Mercruiser and OMC Stern Drives. Fits MCM/MIE Ford V-8 engines Use With: 18-1996...

      • Sierra 18-1845 MerCruiser V6/V8 Dry-Joint Exhaust Elbow
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        $518.09
        $372.99

        Sierra 18-1845 MerCruiser V6/V8 GM Dry-Joint Exhaust Elbow Replaces 864591T02 This Sierra aftermarket exhaust elbow is for use with Mer Cruiser V6/V8 GM engines with dry joint exhaust manifolds...

      • CLEARANCE
        Sierra 18-1992-1 Manifold Elbow Adapter
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        $271.69
        $181.99

        Sierra 18-1992-1 Manifold Elbow Adapter Sierra high-quality engine parts are designed to meet OEM specifications. For 3" I.D. Exhaust Hose. 80° Interchangeable...

      • Quicksilver OEM MerCruiser V8 1981-2002 E-Coated Exhaust Manifold - 807078T08
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        $455.99
        $379.99

        Quicksilver OEM MerCruiser V8 1981-2002 E-Coated Exhaust Manifold - 807078T08 This genuine OEM part is designed for use with MerCruiser V8 GM engines made between 1981 and 2002. This e-coated...

      • Sierra 18-3600 Sea Water Pump Replaces 46-72774A32
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        $781.39
        $562.59

        Mercruiser Sea Water Pump for V-8 For V-8 engines with V-Belt and 2 piece pump Replaces: Mercury 46-72774A32 GLM 12093

      • Sierra 18-70948 Molded Hose
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        $58.29
        $41.99

        Sierra 18-70948 Mercruiser Molded Hose Sierra 18-70948 Molded Hose is for cooler to thermostat housing. Sierra high-quality replacement engine parts are designed to meet OEM quality. Fits MCM/MIE...

      • Sierra 18-15115 Serpentine Belt Replaces 57-861757Q
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        $128.29
        $92.39

        Mercruiser Serpentine Belt - Width: 13/16" Length: 97.5" by Sierra Replaces: Mercury - 57-861757, 57-861757Q

      • Sierra 18-1842 MerCruiser V6 Dry Join Exhaust Manifold
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        $507.09
        $365.09

        Sierra 18-1842 MerCruiser V6 Dry Join Exhaust Manifold The Sierra V6 Dry Join Exhaust Manifold helps ensure water does not enter the cylinders in the case of a gasket failure. Water is transferred...

      • Quicksilver 57-865615Q04 1941 mm Belt Serpentine Image
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        $126.59
        $105.49

        Quicksilver 57-865615Q04 1941 mm Belt Serpentine Quicksilver 865615Q04 Serpentine Belt is a direct replacement belt for select 2001 and newer MerCruiser Alpha V6 and V8 engines with standard cooling...

      • EMP 47-01814 Mercury Mariner Impeller
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        $24.96
        $20.80

        EMP 47-01814 Mercury Mariner Impeller This impeller is intended for use on Mercury Mariner, Honda, and Force engines and meets all OEM requirements. Specification: ID: 22.4mm OD: 89mm W: 32...

      • Exhaust Tube, Mercury - Mercruiser 32-8M0199681 Image
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        $86.39
        $71.99

        Quicksilver 8M0199681 Exhaust Bellows Tube For MerCruiser 120, 140, V6 & V8 Sterndrive Engines Quicksilver 8M0199681 Exhaust Bellows Tube is a replacement exhaust component designed for select...

      • Sierra 18-15102 Serpentine Belt Replaces 57-865615Q06
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        $133.99
        $104.49

        Sierra 18-15102 Serpentine Belt Sierra replacement serpentine belt for Mercruiser V8 Engines. Sierra engine components are manufactured to meet or exceed OEM requirements. Length: 105" Width:...

      • Sierra 18-1966-1 MerCruiser 3.0L 1990-Newer Exhaust Manifold
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        $708.89
        $510.39

        Sierra 18-1966-1 MerCruiser 3.0L 1990-Newer Exhaust Manifold This Sierra aftermarket exhaust manifold is for use with MerCruiser 3.0L & LX engines built from 1990 to the present. Fits MCM 3...

      • Sierra 18-0342 Power Trim Hose Connector Plate Gasket
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        $1.89
        $1.59

        Sierra 18-0342 Power Trim Hose Connector Plate Gasket Sierra 18-0342 Power Trim Hose Connector Plate Gasket is a replacement part for Mercruiser Stern Drives. Interchangeable...

      • Sierra 18-0462 Carb Mounting Gasket
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        $11.19
        $9.49

        Sierra 18-0462 Carburetor Mounting Gasket Sierra replacement carburetor mounting gasket for use with Mercruiser Stern Drive. Interchangeable...

      • Sierra 1985-2002 MerCruiser V6 GM Exhaust Manifold Kit
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        $1,299.99
        $795.99

        Sierra 1985-2002 MerCruiser V6 GM Exhaust Manifold Kit Boat exhaust manifolds are an important part of your boat and maintaining, repairing, or replacing these parts is important to keep your boat...

      • Quicksilver 46-8M0113733 Water Pump Assy Thumbnail Image
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        $158.99
        $139.99

        Quicksilver 46-8M0113733 Water Pump Assy. Quicksilver 8M0113733 water pump assembly fits MerCruiser 3.0L TKS Alpha engines Product Features

      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!