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      Mercruiser Cooling System Product Listings

      • 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 the essential components needed to repair the...

      • 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 V8 sterndrive and inboard engines from 2002 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. (1979-89)  OMC/Volvo...

      • 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 recommended for use on plug threads. Thread Size:...

      • 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 & V-8 (305, 350, 454 & 502 CID) engines...

      • EMP 26-01800-B Mercury MerCruiser Water Pump Kit
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        $72.95
        $60.79

        EMP 26-01800-B Mercury MerCruiser Water Pump Kit This complete water pump kit is intended for use on Mercury & MerCruiser engines and meets all OEM requirements. Complete Water Pump & Seal Kit Application: For Mercury Mariner 1988-2006 V6...

      • 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 - Water Pump Base to Gear Housing Gasket 18-3110 -...

      • 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 Thermostat Cover Gasket (1) 18-2843 Thermostat Gasket (1)...

      • 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...

      • Sierra 18-3155 Water Pump Repair Kit
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        $192.19
        $138.39

        Sierra 18-3155 Water Pump Repair Kit

      • Sierra 18-70704 Molded Hose
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        $21.89
        $16.99

        Mercruiser, Volvo, OMC 5" Molded Hose - Special Order est. 10 Days Replaces: OMC 0509325 Mercury 32-89653 VOL 838513, 856505 Redline RL70704 5" overall length, 1 1/4" ID

      • EMP 46-46502 Mercury MerCruiser Water Pump Kit
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        $134.88
        $112.40

        EMP 46-46502 Mercury MerCruiser Water Pump Kit with Housing 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, stainless steel housing, impeller, and...

      • Sierra 18-3552 Thermostat Replaces 76270T
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        $28.29
        $20.39

        Sierra 18-3552 Thermostat for Mercruiser and Crusader Engines Sierra replacement thermostat for Crusader and Mercruiser engines. Temperature Rating: 160°F For: Fresh Water Cooling Fits: 470/485 models (s/n 6218036 and below) Interchangeable...

      • Sierra 1981-2002 MerCruiser V8 Big Block GM Exhaust Manifold Kit
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        $1,151.96
        $716.96

        Sierra 1981-2002 MerCruiser V8 Big Block 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 running smoothly and avoid additional costly...

      • Sierra 18-0487 Intake Gasket
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        $122.29
        $88.09

        Sierra 18-0487 Intake Gasket Sierra 18-0487 Intake Gasket fits MCM 262 Mag & 4.3L/LX/LH/LXH (Gen+) (1996 & up) Interchangeable with: Mallory 9-61214 Mercruiser Stern Drive 27-8243261 27-824326002

      • Sierra 18-3506-1 Circulating Pump
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        $316.49
        $246.79

        Sierra 18-3506-1 Circulating Pump Sierra replacement circulating pump for V6 Sterndrives. All Sierra aftermarket engine parts are manufactured to meet or exceed OEM requirements. For V6 MCM (s/n 1A063240 & up); Newer 4.3L w/o water bypass...

      • Sierra 18-710-20-2 Hose Clamp 13/16" - 1-3/4"
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        $4.59
        $3.89

        Sierra 18-710-20-2 Hose Clamp 13/16" - 1-3/4" Material: Marine Grade 316 stainless steel Diameter: 13/16" to 1 3/4" Std #: 020 Sold individually Interchangeable with: Mercruiser Stern Drive 54-32780 54-32880 54-815504220

      • Sierra 18-70945 Molded Hose
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        $56.59
        $40.69

        Molded Hose - Special Order est. 10 Days

      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!