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      Mercruiser Cooling System Product Listings

      • Sierra 18-1990 Manifold Block Off Plate
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        $27.39
        $19.69

        Manifold Block Off Plate - Special Order est. 10 Days

      • Mercury - Mercruiser 8M0061381 Therm Hsg Asm
        $254.99
        $224.49

        Mercury - Mercruiser 8M0061381 Therm Hsg Asm Genuine OEM Mercury-Mercruiser part. Special Order Mercury Marine Information: Additional Handling Time: Item transfers from an alternate warehouse requires an additional 1–3 business days to ship. Non...

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      • Mercury - Mercruiser 30-863129 Ball-Check Image
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        $2.49

        Mercury-MerCruiser 30-863129 Check Ball The Mercury-MerCruiser 30-863129 Check Ball is a genuine OEM replacement component for compatible MerCruiser inboard and sterndrive applications. This check ball is used where part number 30-863129 is specified by...

      • Quicksilver OEM MerCruiser 4.3L/5.0L/5.7L/7.4L 2002 & Older E-Coated Exhaust Elbow 807988Q03
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        $267.59
        $222.99

        Quicksilver OEM MerCruiser 4.3L/5.0L/5.7L/7.4L 2002 & Older E-Coated Exhaust Elbow 807988Q03 This genuine OEM exhaust elbow is for use on V6 & V8 MerCruiser stern drive engines produced by General Motors 2002 and older that features a center...

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        Sierra 18-1210 End Cap To Manifold Gasket
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        $0.70
        $0.47

        Sierra 18-1210 End Cap To Manifold Gasket Sierra high-quality engine parts are designed to meet OEM specifications. Fits MCM 120 & 160 Interchangeable with: Barr MC472739923 GLM 31420 Mallory 9-61409 Mercruiser Stern...

      • Sierra 18-15104 Serpentine Belt Replaces 57-865615Q08
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        $121.59
        $94.89

        Sierra 18-15104 Mercruiser Serpentine Belt Sierra high-quality engine parts are designed to meet OEM specifications. For use on Mercruiser Stern Drives. Length: 99.50" Width: 13/16" Interchangeable with: Mallory 9-55027 Mercruiser Stern...

      • EMP 57-57520 MerCruiser V8 GM Small Block Exhaust Manifold
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        $263.95
        $219.96

        EMP 57-57520 MerCruiser V8 GM Small Block Exhaust Manifold This exhaust manifold is designed for use with MerCruiser cooling systems and meets OEM specifications. Exhaust Manifold Application: Fits most MerCruiser (GM) small blocks with center...

      • Mercury - Mercruiser 32-8M0071007 Hose
        $45.99
        $40.49

        Mercury - Mercruiser 32-8M0071007 Hose Genuine OEM Mercury-Mercruiser part. Application: 3.0L TKS Plus - {1G700000 THRU 1G799999] Special Order Item: This product is ordered specifically for your application. To help ensure proper fitment, please...

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      • Quicksilver OEM MerCruiser 5.0L/5.7L 1983-2002 E-Coated Exhaust Manifold Thumbnail Image
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        $427.49
        $358.99

        Quicksilver OEM MerCruiser 5.0L/5.7L 1983-2002 E-Coated Exhaust Manifold This Genuine OEM part is designed for use with select MerCruiser 5.0L or 5.7L GM engines built between 1983 & 2002. This dry joint exhaust manifold can be used on either port...

      • Quicksilver OEM MerCruiser 4.3L/5.0L/5.7L Dry Joint Exhaust Elbow 864591T02 Thumbnail Image
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        $570.59
        $475.49

        Quicksilver OEM MerCruiser 4.3L/5.0L/5.7L Dry Joint Exhaust Elbow 864591T02 This genuine OEM exhaust elbow is for use on MerCruiser 4.3L/5.0L/5.7L stern drive engines produced by General Motors 2004 and newer that features a dry joint exhaust...

      • Sierra 18-0404 Intake Gasket Kit
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        $110.89
        $86.49

        Sierra 18-0404 Intake Gasket Kit Sierra replacement intake gasket kit for use on Mercruiser engines: MCM/MIE 454 Mag MPI, 502 Mag MPI, 7.4L/LX MPI & 8.2L MPI (1993 & newer). Interchangeable with: Mercruiser Stern Drive 27-805403A1

      • Sierra 18-2554-9 Thermostat Cover Gasket (Pkg Of 2)
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        $16.59
        $14.09

        Sierra 18-2554-9 Mercruiser Thermostat Cover Gasket (Pkg Of 2) Sierra replacement thermostat cover gasket for Mercruiser Stern Drives. Fits: MCM/MIE GM V-6 & V-8 engines Package of 2 Interchangeable...

      • Sierra 18-70954 Molded Hose
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        $56.59
        $40.69

        Sierra 18-70954 Mercruiser Molded Hose Sierra high-quality engine parts are designed to meet OEM specifications. For use for oil cooler to oil cooler. Fits 5.0L, 5.7L/LX, 350 Mag & MX 6.2L MPI Interchangeable...

      • Sierra 18-71218 Molded Hose
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        $27.09
        $19.49

        12 1/2" Molded Hose - Special Order est. 10 Days Replaces: MALLORY 9-44072 MERCURY 32-48132 OMC 0509268 12 1/2" Overall Length 1" ID

      • Quicksilver OEM MerCruiser 2.5L/3.0L Exhaust Manifold
        $684.99
        $574.99

        Quicksilver OEM MerCruiser 2.5L/3.0L Exhaust Manifold 860235A04 This Quicksilver OEM MerCruiser part features a one piece design and is for use with MerCruiser 2.5L/3.0L engines Used With: Exhaust Elbow 12076A-2 Exhaust Manifold Mounting Gasket...

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      • Sierra 18-43015 Mercruiser Thermostat
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        $32.49
        $25.29

        Sierra 18-43015 Mercruiser Thermostat Sierra replacement thermostat for Mercruiser Stern Drives. Fits: MCM 4.3L, 5.0L, 5.7L & 6.2L MPI engines w/dry joint exhaust & closed cooling Temperature Rating: 170°F (77°C) Interchangeable...

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        Sierra 18-70924 Molded Hose
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        $13.09
        $8.79

        5" Molded Hose 5" Overall Length 1 3/4" ID  

      • Jabsco 17954-0001-P Impeller replaces 47-59362 Image
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        $78.99
        $55.99

        Jabsco 17954-0001-P Impeller replaces Mercruiser 47-59362 This Jabsco impeller is constructed from durable neoprene for a long working life. This water pump impeller comes with lubricant, a gasket and instructions for easy installation. This impeller is...

      • Mercury - Mercruiser 807252T4 Thermostat Kit
        $64.19
        $53.49

        Mercury - Mercruiser 807252T4 Thermostat Kit Genuine OEM Mercury-Mercruiser part. Special Order Mercury Marine Information: Additional Handling Time: Item transfers from an alternate warehouse requires an additional 1–3 business days to ship. Non...

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      • Quicksilver OEM MerCruiser 3.0L/LX 1990 & Newer Exhaust Manifold 860235A03
        $674.99
        $566.99

        Quicksilver OEM MerCruiser 3.0L/LX 1990 & Newer Exhaust Manifold 860235A03 This genuine OEM MerCruiser 3.0L exhaust manifold is for Marine power engine model E181S engines built from 1990 to the present. Application Info: Fits MerCruiser 3.0L...

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      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!