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      Mercruiser Cooling System Product Listings

      • Sierra 18-3649 Thermostat Replaces 8M0091470
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        $30.79
        $22.19

        Sierra 18-3649 Thermostat Sierra 18-3649 Thermostat is a replacement part for MerCruiser Stern Drives. All Sierra engine parts are manufactured to meet or exceed OEM requirements...

      • Mercury Mercruiser Stainless Steel Hose Clamp 54-8M0188622
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        $4.99
        $4.49

        Mercury-MerCruiser 54-8M0188622 Stainless Steel Hose Clamp - 4 1/16" to 5" The Mercury-MerCruiser 54-8M0188622 Hose Clamp is a genuine OEM stainless steel replacement clamp for compatible Mercury...

      • Sierra 18-1998-1 Exhaust Manifold
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        $458.69
        $330.29

        Sierra 18-1998-1 Exhaust Manifold - Port & Starboard for Ford V8 Engines Fits Port and Starboard Sides. Universal Center Riser Manifold. Fits: Crusader 302 and 351 CID Engines Interceptor 221,...

      • Sierra 18-2761 Exhaust Tube Replaces 32-90949T
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        $64.19
        $46.19

        Sierra 18-2761 MerCruiser 3" Exhaust Tube Sierra replacement exhaust tube for use with MerCruiser Stern Drives. Sierra engine parts are manufactured to meet or exceed OEM requirements...

      • GM V-6 & V-8 Circulating Pump Hose Assy, Mercury - Mercruiser 32-861590A05
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        $65.99
        $57.99

        Mercury-MerCruiser 32-861590A05 Circulating Pump Hose Assembly - GM V6 & V8 The Mercury-MerCruiser 32-861590A05 Circulating Pump Hose Assembly is a replacement hose assembly for compatible MCM and...

      • Sierra 18-0680 Exhaust Manifold Gasket Replaces 27-815528
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        $22.69
        $19.29

        Sierra 18-0680 Exhaust Manifold Gasket Sierra aftermarket engine parts are manufactured to meet or exceed OEM requirements. Fits MCM 3.0L (1998 & Newer) & MCM 3.0LX (1990-1997) Interchangeable...

      • Sierra 18-3602 Water Intake Hose Replaces 32-8M0062309
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        $16.39
        $12.79

        Sierra 18-3602 Water Intake Hose for Mercruiser Sierra replacement water intake hose for use with Mercruiser Stern Drives. Fits: MR, Alpha One & Gen II Diameter Size: 3/4" or 19.1mm Length:...

      • Thermostat Housing Gasket, Mercury - Mercruiser 27-47590-1
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        $2.99

        Mercury-MerCruiser 475901 Water Distributor Block Gasket The Mercury-MerCruiser 475901 Water Distributor Block Gasket is a replacement gasket designed to help seal the water distributor block in...

      • Sierra 18-0418 Exhaust Manifold Mounting Gasket Replaces 27-46820
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        $22.99
        $16.59

        Sierra 18-0418 Exhaust Manifold Mounting Gasket Sierra high-quality engine parts are designed to meet OEM specifications. Features: Fits MCM/MIE GM V-8 (454, 482, 496, 502 & 504 CID) engines...

      • Quicksilver 807252T-1 Thermostat 140 Degree Image
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        $28.19
        $23.49

        Quicksilver 807252T-1 Thermostat 140 Degree Quicksilver 8M0089715 Thermostat is a 140°F replacement thermostat designed for select MerCruiser sterndrive and inboard engines with standard cooling...

      • Sierra 18-70931 Molded Hose Oil Cooler To Therm Replaces 32-8M071007
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        $41.79
        $30.09

        Sierra 18-70931 Molded Hose For MerCruiser Stern Drives Sierra high-quality replacement parts are designed to meet OEM specifications. This molded hose is for connecting the distribution block to...

      • Mercury - Mercruiser 10-98794 Mounting Screw
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        $4.49
        $3.99

        Mercury-MerCruiser 10-98794 3/8-16 x 1" Mounting Screw The Mercury-MerCruiser 10-98794 Mounting Screw is a replacement stainless steel fastener for compatible Mercury-MerCruiser applications. This...

      • Quicksilver 47-8M0137219 Impeller Kit image
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        $56.99
        $47.49

        Quicksilver 47-8M0137219 Heavy Duty Impeller Kit Quicksilver 8M0137219 Water Pump Impeller Repair Kit is a genuine replacement kit designed for 2000 and newer MerCruiser V6 and V8 engines equipped...

      • Sierra 18-15440 V-Belt
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        $35.89
        $25.89

        Sierra 18-15440 Mercruiser, OMC, Volvo V-belt - Effective Length: 44" Top Width: 29/64" Sierra high-quality engine parts are designed to meet OEM specifications. High strength synthetic cords...

      • Sierra 18-1951-1 Exhaust Manifold Replaces 77235A2
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        $678.39
        $474.79

        Mercruiser Manifold - Starboard - with Mounting Package by Sierra Fits most Mercruiser GM Small Blocks with End Risers. Key Features: Starboard Side Supplied with Mounting Package          ...

      • Quicksilver 160 Degree Thermostat Kit, Mercury - Mercruiser 807252Q-5 Image
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        $47.99
        $39.99

        Quicksilver 807252Q-5 Thermostat Kit - 160 Degree Quicksilver 807252Q5 Thermostat is a 160°F replacement thermostat designed for select GM V6 and V8 MerCruiser engines with standard cooling systems...

      • Sierra 18-15100 Serpentine Belt Replaces 57-865615Q03
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        $159.69
        $114.99

        Sierra 18-15100 MerCruiser 106.25" Serpentine Belt Sierra replacement serpentine belt for MerCruiser Stern Drives. Features: Width: 13/16" Length: 106.25" Interchangeable With: MerCruiser...

      • Sierra 18-70934 Molded Hose
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        $72.39
        $52.09

        Sierra 18-70934 Mercruiser Molded Hose Sierra high-quality engine parts are designed to meet OEM specifications. Fits MCM/MIE GM V-8 (427, 454 & 502 CID) engines. Interchangeable...

      • Sierra 18-710-72-2 Hose Clamp 4-1/16"-5"
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        $6.29
        $5.39

        Sierra 18-710-72-2 Stainless Steel Hose Clamp 4-1/16" to 5" Sierra hose clamp manufactured from marine grade 316 stainless steel. Diameter Size: 4-1/16" to 5" Std. No.: 072 Interchangeable...

      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!