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      Mercruiser Cooling System Product Listings

      • Sierra 18-15101 Serpentine Belt
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        $119.89
        $86.29

        Sierra 18-15101 Mercruiser Serpentine Belt Length: 76.5" Width: 13/16" Interchangeable with: Mercruiser Stern Drive 57-863876 4 57-862086A1 57-862086 57-8620861 57-865615004 57-865615Q04

      • Sierra 18-4258 Pipe Plug
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        $6.79
        $5.69

        Sierra 18-4258 MerCruiser Pipe Plug Sierra stainless steel pipe plug with square drive. Note: Pipe sealant with Teflon is recommended for use on plug threads. Thread Size: 3/4" - 14 NPT Use With: 18-1949 Manifold Spacer 18-1984 Manifold...

      • Quicksilver 99155T-1 Thermostat Kit Image
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        $42.49
        $37.49

        Mercury-MerCruiser 991551T1 160°F Thermostat Kit The Mercury-MerCruiser 991551T1 Thermostat Kit is designed for 1998 and newer MerCruiser marinized V6 and V8 engines made by General Motors that use closed cooling systems and require a 160°F...

      • Sierra 18-1937 MerCruiser 3.7L Exhaust Manifold Elbow
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        $399.79
        $311.79

        Sierra 18-1937 MerCruiser 3.7L Exhaust Manifold Elbow Replaces 98562A6 This Sierra exhaust manifold elbow is for use with MerCruiser 3.7L engines. Application Info: MerCruiser 4 Cyl 224 cu. in. 3.7L engine models 165, 170, 180, & 190 Use...

      • Sierra 18-1970-2 Riser Elbow
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        $338.79
        $243.99

        Sierra 18-1970-2 Riser Elbow Sierra Marine 18-1970-2 is a replacement riser elbow for V-6 and V-8 applications. Sierra aftermarket engine parts are manufactured to meet or exceed OEM requirements. Features: Fits: V-6 & V-8 Applications 3"...

      • Sierra 18-0398-9 Thermostat Gasket (Priced Per Pkg Of 2)
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        $7.69
        $6.59

        Sierra 18-0398-9 Thermostat Gasket (Priced Per Pkg Of 2) Sierra replacement thermostat gasket for Mercruiser, Volvo Penta, and OMC Stern Drives. Use with aluminum exhaust manifold. Fits: 110/120 & 140/150/160 (I/L 6 cyl.) also MCM 3.0L/LX...

      • 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 With: Mallory 9-42500 MerCruiser 861006A1 8M0061381

      • 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 Drive 32-807458T Application: Mercruiser Stern Drive 262 MAG TBI...

      • 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 Manifold 18-1998-1 Manifold 18-1962-1...

      • 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 with: Barr 200087P Mallory 9-40120

      • 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 V-6 & V-8 (305, 350 & 377 cid) engines...

      • 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 manifold boasts corrosion protection on the internal coolant...

      • 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 from the manifold to the riser externally. Can be used...

      • 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 systems. Measuring 1,941 mm in length, this belt...

      • 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: 32.5mm 6 Blades Uses Key 28-32833 Impeller...

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

        Quicksilver 8M0199681 Exhaust Bellows Tube For MerCruiser 120, 140, V6 & V8 Sterndrive Engines Quicksilver OEM exhaust bellows tube designed for MerCruiser 120, 140, and select GM V6 and V8 sterndrive engines. Helps direct exhaust flow while...

      • 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 3.0L/LX (1990 & newer); Marine Power Engine Model...

      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 Captain’s Club Rewards Program for additional discounts on everything you need to keep your boat in top shape for your next adventure!