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      Mercruiser Cooling System Product Listings

      • Sierra 18-15410 V-Belt Replaces 57-64032Q1
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        $30.39
        $21.89

        Sierra 18-15410 V-belt - for Mercruiser and OMC High strength synthetic cords resist shockload failure. Their low stretch properties assure uniform performance over the life of the belt. The...

      • Sierra 18-15112 Serpentine Belt Replaces 57-865615Q04
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        $119.99
        $86.39

        Sierra 18-15112 Mercruiser Serpentine Belt Sierra high-quality engine parts are designed to meet OEM specifications. For Mercruiser Stern Drives. Length: 88" Width: 13/16" Interchangeable...

      • Sierra 18-3651 Thermostat Kit
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        $30.09
        $21.59

        Sierra 18-3651 Mercruiser 142 Degree Thermostat Kit Sierra high-quality engine parts are designed to meet OEM specifications. Temperature Rating: 142 degrees Kit Includes: (1) 18-2553...

      • Sierra 18-2949-9 Exhaust Manifold Gasket (Priced Per Pkg Of 2)
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        $36.39
        $26.19

        Sierra Exhaust Manifold Gasket Special Order Item est. 10 Days Priced 2 per package For use on Volvo Penta I/O Engines: AQ200, 225, 260, 271, 290, 311 V-8 Supersedes 18-2949 Replace

      • Sierra 18-8520 Exhaust Manifold Mounting Kit
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        $27.29
        $19.59

        Sierra 18-8520 Mercruiser Exhaust Manifold Mounting Kit Sierra high-quality engine parts are designed to meet OEM specifications. For GM Small Block V8 305-350 cu. in. (Models: 198, 200, 228, 230,...

      • Mercury - Mercruiser 27-863725-1 Gasket
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        $16.79
        $13.99

        Quicksilver OEM MerCruiser V6/V8 Exhaust Manifold Elbow Gasket 27-863725-1 This genuine OEM Mercruiser elbow gasket is for use with 5.0L, 5.7L, 7.4L, 8.2L GM engines with a center rise outlet...

      • Mercury - Mercruiser 46-77177A-3 Water Pump Kit Image
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        $133.19
        $110.99

        Quicksilver 46-77177A-3 Water Pump Kit Quicksilver 77177A3 Water Pump Repair Kit is a comprehensive replacement kit designed to restore the cooling system on select Mercury and Mariner 30-70 HP...

      • Sierra 18-3221 Water Tube Replaces 32-860220
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        $18.89
        $14.69

        Sierra 18-3221 Mercruiser Alpha Gen II Water Tube Sierra high-quality replacement water tube for Mercruiser Alpha Gen II Cooling Systems. Interchangeable...

      • Quicksilver 47-85089Q-4 Water Pump Repair Kit Image
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        $50.99
        $42.49

        Quicksilver 47-85089Q-4 Water Pump Repair Kit Quicksilver 85089Q4 Water Pump Repair Kit is a complete replacement kit designed for select Mercury and Mariner 15-25 HP 2-Stroke outboards. This kit...

      • Sierra 18-0891-9 Water Pump Mounting Gasket (2Pk) Replaces 27-34897
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        $6.49
        $5.39

        Water Circulating Pump Mounting Gasket for Mercruiser, Volvo, OMC (2 Pack) For GM 4.3L, 5.0L & 5.8L Engines. Replaces: Mercruiser - 27-34897 Volvo & OMC - 3852477 OMC - 909835

      • Sierra 18-15290 V-Belt Replaces 57-13457Q
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        $24.99
        $17.99

        Sierra 18-15290 Mercruiser Water Pump V-Belt Sierra high-quality engine parts are designed to meet OEM specifications. Sierra V-Belts are designed to meet or exceed OEM requirements. Their low...

      • Quicksilver 47508T Brass Thermostat Sleeve Image
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        $17.49
        $15.49

        Quicksilver 47508T Thermostat Sleeve Quicksilver 47508T Brass Retaining Thermostat Sleeve is a genuine replacement component designed for select 1995 and older MerCruiser V6 and V8 engines. This...

      • Mercury OEM Mercruiser Alpha One Gen II Water Pump Repair Kit
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        $222.59
        $185.49

        Mercury OEM Mercruiser Alpha One Gen II Water Pump Repair Kit 817275K05 This genuine OEM MerCruiser water pump rebuild kit is for use with Alpha One Gen II Sterndrives. By repairing and maintaining...

      • Sierra 18-1977-1 MerCruiser V6/V8 Thermostat Housing
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        $92.89
        $66.89

        Sierra 18-1977-1 Mercruiser Thermostat Housing Sierra high-quality engine parts are designed to meet OEM specifications. Fits MCM/MIE GM V-6 & V-8 (305 & 350 cid) engines & Hi-Perf 454, 502 & 540...

      • Sierra 18-3603 Water Intake Hose
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        $44.09
        $36.59

        Water Intake Hose - Special Order est. 10 Days

      • Sierra 18-4009 Manifold End Plate Replaces 60252A2
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        $89.29
        $64.29

        Sierra 18-4009 Manifold End Plate for Mercruiser & OMC Sterndrives Sierra high-quality engine parts are designed to meet OEM specifications. For Use With: 18-1950-1 Manifold 18-1951-1...

      • Sierra 18-70956 Molded Hose
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        $36.29
        $26.09

        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 Wholesale Rewards Program for additional discounts on everything you need to keep your boat in top shape for your next adventure!