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      Mercruiser Cooling System Product Listings

      • 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

      • EMP 46-00090 Mercury MerCruiser Water Pump Kit with Housing
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        $55.68
        $46.40

        EMP 46-00090 Mercury MerCruiser Water Pump Kit with Housing This EMP replacement water pump kit is for use with Mercury and MerCruiser engines. Water Pump Application Information: For MerCruiser...

      • Quicksilver 817275Q05 Water Pump Rebuild Kit Image
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        $203.99
        $169.99

        Quicksilver 817275Q05 Water Pump Rebuild Kit  Quicksilver 817275Q05 Upper Water Pump Repair Kit is designed for MerCruiser Alpha One Gen II and Vazer drive units. This complete 11-piece kit includes...

      • Quicksilver 864612T01 4.3L Dry Joint Exhaust Manifold Thumbnail Image
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        $595.19
        $495.99

        Quicksilver OEM MerCruiser 4.3L Dry Joint Exhaust Manifold 864612T01 This OEM Mercruiser 4.3L exhaust manifold is for GM V6 engines made from 2022 to the present. Dry joint manifolds essentially...

      • Sierra 18-0720 Closed Riser Gasket
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        $77.79
        $55.99

        Sierra 18-0720 Closed Riser Gasket Sierra high-quality engine parts are designed to meet OEM specifications. Sierra Mercruiser dry joint open riser gasket. This elbow gasket is for use with dry...

      • Sierra 18-8533 Exhaust Manifold Mounting Kit
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        $33.99
        $24.49

        Sierra 18-8533 Mercruiser Exhaust Manifold Mounting Kit Sierra high-quality engine parts are designed to meet OEM specifications. For Mercruiser GM V6 229 and 262cu in. (Models 185 and 205). Used...

      • EMP 27-00524 Exhaust Riser Gasket
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        $6.71
        $5.59

        EMP 27-00524 Exhaust Riser Gasket This exhaust gasket is intended for use with MerCruiser engines and meets all OEM requirements. Exhaust Riser Gasket Application: For 1981-2001 V6 175-205HP; V8...

      • EMP 46-46501 Mercury MerCruiser Water Pump Kit
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        $82.56
        $68.80

        EMP 46-46501 Mercury MerCruiser Water Pump Kit This EMP replacement water pump kit is for use with Mercury and MerCruiser engines. This boat water pump kit comes with a rubber coated wear plate,...

      • Quicksilver OEM MerCruiser 5.0 / 5.7 Dry Joint Exhaust Manifold 8M0185794
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        $641.99
        $534.99

        Quicksilver OEM MerCruiser 5.0L/5.7L Dry Joint Exhaust Manifold This Genuine OEM part is designed for use with MerCruiser 5.0l or 5.7l GM engines 2002 and newer. This dry joint exhaust manifold can...

      • Sierra 18-3116 Water Pump Housing Replaces 46-96148T1
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        $53.09
        $38.19

        Sierra 18-3116 Water Pump Housing for Mercury, Mercruiser Sierra high-quality replacement engine parts are designed to meet OEM specifications.  For use with 18-3109 Water Tube Guide and 18-3110...

      • Sierra 18-15121 Serpentine Belt
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        $120.29
        $93.89

        Serpentine Belt - Special Order est. 10 Days

      • Quicksilver OEM MerCruiser V6/V8 Dry Joint Exhaust Closed Elbow Gasket Thumbnail image
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        $57.59
        $47.99

        Quicksilver OEM MerCruiser 4.3L/5.0L/5.7L/6.2L GM 2002 & Newer Dry Joint Exhaust Closed Elbow Gasket 27-864549A02 Quicksilver OEM Block-off style exhaust elbow gasket for GM-based MerCruiser V6 and...

      • Sierra 18-8502 Exhaust Manifold Mounting Kit
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        $81.79
        $58.89

        Sierra 18-8502 Exhaust Manifold Mounting Kit for V-8 Small Block Sierra high-quality engine parts are designed to meet OEM specifications. OMC GM Small Block V8 305-350cu.in...

      • Sierra 18-4264 Pipe Plug
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        $5.29
        $4.69

        Sierra 18-4264 Pipe Plug Sierra high-quality engine parts are designed to meet OEM specifications. For use on Mercruiser Stern Drives and Mercury Marine engines. Using Pipe Sealant with Teflon is...

      • Sierra 18-3531 Thermostat Housing
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        $24.99
        $19.49

        Sierra 18-3531 Thermostat Housing Sierra replacement thermostat housing for Mercruiser Sterndrives. Sierra engine parts are manufactured to meet or exceed OEM requirements. Fits: MCM/MIE GM V-6 &...

      • CLEARANCE
        Sierra 18-3321 Water Pump Kit
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        $132.09
        $95.09

        Mercruiser Water Pump Kit by Sierra For #1 Units with flush S/N 2495186 - 2763441. Kit Includes: 18-3109 - Water Tube 18-3017 - Impeller 18-3116 - Housing 18-3421 - Water Pump Base 18-2919 -...

      • Sierra 18-3652 Thermostat Kit
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        $36.69
        $26.39

        Sierra 18-3652 Mercruiser 160 Degree Thermostat Kit Sierra high-quality replacement thermostat kit for Mercruiser Stern Drives. 160 Degree Temperature Rating Kit Contains: (1) 18-2555...

      • Exhaust Manifold Gasket Set, Mercury - Mercruiser 27-33395A-2
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        $48.49
        $42.49

        Exhaust Manifold Gasket Set, Mercury - Mercruiser 27-33395A-2 For GM 305, 327, 350 cid engines with end outlet exhaust manifolds. Replaces: Aqua...

      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!