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      Mercruiser Cooling System Product Listings

      • 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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      • Quicksilver OEM MerCruiser 4.3L GM 1985-2002 Exhaust Manifold 99746A17 with all included components
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        $413.99
        $363.99

        Quicksilver OEM MerCruiser 4.3L GM 1985-2002 Exhaust Manifold 99746A17 This genuine OEM MerCruiser 4.3L exhaust manifold is designed for GM made 229 & 262 CID engines made between 1985-2002. This Quicksilver exhaust manifold features a protective...

      • Sierra 18-0893-9 Water Pump Back-In Plate Gasket (Pkg Of 2)
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        $18.69
        $14.59

        Sierra 18-0893-9 Water Pump Back-In Plate Gasket (Pkg Of 2) Sierra replacement water pump gasket for Mercruiser, Volvo Penta, and OMC Stern Drives. Fits: GM 4.3L, 5.0L & 5.7L Package of 2 Interchangeable...

      • Sierra 18-2007 Oil Seal Replaces 26-94038
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        $16.99
        $12.19

        Sierra 18-2007 Oil Seal Sierra high quality aftermarket parts are manufactured to meet or exceed OEM requirements. O.D.: 1.500" Shaft Size: 1.000" Width: 0.312" Interchangeable with: GLM 85600 Mallory 9-76103 Mercruiser Stern...

      • Sierra 18-3216 Impeller Kit
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        $59.69
        $46.59

        Impeller Kit - Special Order est. 10 Days

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        Sierra 18-4257 Pipe Plug
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        $2.39
        $1.59

        Sierra 18-4257 Pipe Plug Sierra high-quality replacement pipe plug for use.  Material: Black Steel Thread Size: 1/4" Note: Pipe sealant with Teflon is recommended for use on plug threads. Use with: 56507 Loctite Pipe Sealant (PST 6ml w/...

      • Quicksilver OEM MerCruiser 5.0/5.7 1983-2002 Exhaust Manifold 860246A15 Thumbnail Image
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        $514.19
        $428.49

        Quicksilver OEM MerCruiser 5.0L/5.7L GM 1983-2002 Exhaust Manifold 860246A15 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...

      • Mercury - Mercruiser 8M0153706 Water Pump Pulley
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        $64.79
        $53.99

        Mercury - Mercruiser 8M0153706 Water Pump Pulley Genuine OEM Mercury-Mercruiser part. Fits: 4.3L Alpha 4V EST - [1G417302 THRU 1G499999] Special Order Item.Special Order Quicksilver Information: Additional Handling Time: Item transfers from an...

      • Quicksilver OEM MerCruiser 3" Exhaust Riser Spacer Kit Image
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        $587.39
        $489.49

        Quicksilver 93320A13 Exhaust Riser Kit - 3" Rise for Select MerCruiser V6 & V8 Engines Quicksilver 93320A13 Exhaust Riser Kit is designed for use on select MerCruiser sterndrive and inboard engines. This kit provides a 3-inch rise to the exhaust...

      • Sierra 18-15345 V-Belt
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        $32.59
        $23.49

        Sea Water Pump V Belt - Effective length 34.5". Top width 29 / 64" Replaces: Mercury 57-74271Q, 57-68038, 57-74271T Sierra 18-15340 OMC 0509306 Details: High strength synthetic cords resist shockload failure. Their low stretch...

      • Sierra 18-15470 V-Belt
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        $39.79
        $28.59

        OMC, Mercruiser V-BELT - Effective Length 47", Top Width 29/64" Replaces: Mercury 57-78200Q 1, 57-78200A 1 OMC 0509309 Redline RL15470 Details: High strength synthetic cords resist shockload failure. Their low stretch...

      • Sierra 18-2844-9 Thermostat Gasket (Pkg Of 2)
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        $4.79
        $4.19

        Sierra 18-2844-9 Thermostat Gasket (Pkg Of 2) Sierra replacement Mercruiser thermostat gasket. Fits: MCM/MIE GM V-8 engines Package of 2 Interchangeable with: Barr MC472748818 GLM 31510 Mallory 9-60010 Mercruiser Stern...

      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!