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      Mercruiser Cooling System Product Listings

      • 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 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

      • Sierra 18-8532 Exhaust Manifold Mounting Kit
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        $32.69
        $23.49

        Sierra 18-8532 Exhaust Manifold Mounting Kit Sierra Exhaust Manifold Mounting Kit for use on Mercruiser GM Big Block V-8 454 cu. in. (models 330, 340 & 7.4L). Use with: 18-1957-1 Manifold Interchangeable...

      • Sierra 18-15550 V-Belt Replaces 57-13458Q
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        $41.09
        $34.09

        Sierra 18-15550 V-Belt Sierra V-Belts are designed to meet or exceed OEM requirements. Their low stretch properties assure uniform performance over the life of the belt.  High strength synthetic cords resist shockload Special rubber compound...

      • Water Pump Base Kit, Mercury - Mercruiser 46-57234T-1
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        $51.99
        $45.99

        Quicksilver 46-57234T1 Water Pump Base Kit for MerCruiser MC-I & R Drives The Quicksilver 46-57234T1 Water Pump Base Kit is a genuine replacement water pump base repair kit for MerCruiser MC-I and R drives. This kit is designed for applications...

      • Quicksilver 8M0113735 Water Pump Assy Image
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        $295.79
        $246.49

        Quicksilver 46-8M0113735 Water Pump Assy. Quicksilver 8M0113735 Bi-Directional Water Pump is a complete replacement water pump assembly designed for select GM-based V8 MerCruiser sterndrive engines. This assembly includes the water pump housing and...

      • Sierra 18-70955 Molded Hose
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        $48.59
        $34.99

        Sierra 18-70955 Molded Hose Molded Hose for Mercruiser V8 (305, 350 & 454 CID) used for thermostat cover to exhaust elbow applications. Fits: MC200/230 (1987) 5.0L Alpha (1988-95) 5.0LX Alpha (1988-95) MC260 (1987) 350 Mag Alpha (1987-95) 5...

      • Quicksilver OEM MerCruiser 4.3L/5.0L/5.7L/7.4L 2002 & Older Exhaust Elbow 807988A03 Image
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        $358.19
        $298.49

        Quicksilver OEM MerCruiser 4.3L/5.0L/5.7L/7.4L 2002 & Older Exhaust Elbow 807988A03 - Center Rise Outlet This genuine OEM exhaust elbow is for use on V6 & V8 MerCruiser stern drive engines produced by General Motors 2002 and older that...

      • Sierra 18-0386 Water Pump Body Gasket
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        $2.99
        $2.59

        Sierra 18-0386 Water Pump Body Gasket - Special Order est. 10 Days Interchangeable with: GLM  32730 Mercruiser Stern Drive 27-72780 27-94914  

      • Sierra 18-0928-1-9 Manifold End Cap Gasket (2 Pk)
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        $23.99
        $17.29

        Sierra 18-0928-1-9 Manifold End Cap Gasket (2 Pk) Sierra replacement manifold end cap gasket used on Mercruiser engines. Fits: MCM/MIE 120/2.5L, 140/3.0L, 165 (I/L 6 cyl.), 470, 898, 228 & 260 Sold as a pack of 2 Interchangeable...

      • Sierra 18-2564-1 Impeller Gasket
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        $18.49
        $13.29

        Sierra 18-2564-2 Impeller Gasket Sierra high-quality engine parts are designed to meet OEM specifications. For use on Chrysler/Force/US Marine, Honda Outboards, Mercruiser Stern Drives, and Mercury Marine engines. Interchangeable...

      • EMP 47-00001 Mercury MerCruiser Impeller
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        $23.04
        $19.20

        EMP 47-00001 Mercury MerCruiser Impeller This impeller is intended for use on Mercury, MerCruiser, and Force engines and meets all OEM requirements. Specification: ID: 22.3mm OD: 60mm W: 33.8mm 6 Blades Uses Key 28-23834 Impeller...

      • Mercruiser 60930 Exhaust Water Shutter
        $43.19
        $35.99

        Mercruiser 60930 Exhaust Water Shutter Genuine OEM Mercury-Mercruiser part. Fits various MCM applications . Special Order Item: This product is ordered specifically for your application. To help ensure proper fitment, please confirm compatibility...

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      • Sierra 18-2566-9 Impeller Gasket (Priced Per Pkg Of 2)
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        $8.89
        $7.59

        Sierra 18-2566-9 Impeller Gasket (Priced Per Pkg Of 2) Sierra high-quality engine parts are designed to meet OEM specifications. For use on Chrysler/Force/US Marine engines, Mercruiser Stern Drives, and Mercury Marine engines. Use For Engine Models:...

      • EMP 47-09201 MerCruiser Impeller Kit
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        $34.56
        $28.80

        EMP 47-09201 MerCruiser Impeller Kit This impeller Kit is intended for use on MerCruiser engines and meets all OEM requirements. Specifications: Double Flat Drive Hub 8 Blades ID: 11.4mm OD: 66.5mm W: 50.6mm Impeller Kit Application: For...

      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!