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      Mercruiser Cooling System Product Listings

      • Sierra 18-4226 Drain Plug Replaces 22-806608A02
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        $4.59
        $3.89

        Sierra 18-4226 MerCruiser Blue Plastic Drain Plug This Sierra 18-4226 drain plug is widely used for MerCruiser V4, V6 and V8 marine engines. Fits MerCruiser cylinder blocks and exhaust manifolds Comes complete with O-ring Interchangeable...

      • Sierra 18-3214 Impeller Kit Replaces 47-8M0100526
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        $48.69
        $35.09

        Sierra 18-3214 Impeller Kit for Mercury Restore proper water pump function with the Sierra 18-3214 impeller kit for MerCruiser Alpha One Gen II systems (D494569 and above). Featuring rubber vanes around a metal hub, this impeller resists wear from heat...

      • Sierra 18-1976-2 MerCruiser V6/V8 2002 & Older Manifold Elbow
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        $247.09
        $145.79

        Sierra 18-1976-2 MerCruiser V6/V8 GM 2002 & Older Manifold Elbow Replaces 807988A03 Unlike automotive engines, all marine inboards have exhaust risers that feature a water induction elbow. Located behind the engine’s coolant reservoir, the...

      • SALE
        Sierra 18-1953-2 Exhaust Manifold
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        $347.99
        $240.09
        $199.99

        Sierra 18-1953-2 MerCruiser V8 1983-2002 Exhaust Manifold The Sierra 18-1953-2 is a direct OEM replacement exhaust manifold designed for MerCruiser GM Small Block V8 engines from 1983 to 2002, including 305, 350, and 377 CID models. This complete kit...

      • Sierra 18-3150 Water Pump Kit Replaces 46-807151A14
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        $135.59
        $100.29

        Sierra 18-3150 MerCruiser Bravo Water Pump Kit The Sierra 18-3150 Water Pump Kit is for use on all MerCruiser Bravo and TRS Sterndrives and Inboard Marine engines. Can be used to replace the 2 piece housing sea water pump. Sierra aftermarket engine...

      • Sierra 18-3320 MerCruiser Alpha One 6854393-0D469858 Water Pump Kit
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        $82.19
        $59.19

        Sierra 18-3320 Water Pump Kit Sierra replacement water pump kit for Mercruiser engines. Sierra high quality aftermarket parts are manufactured to meet or exceed OEM requirements. For MR/Alpha l Units S/N 6854393-0D469858 Includes: Water Pump...

      • Sierra 18-3599-2 Circulating Water Pump Replaces 8503991
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        $171.39
        $131.89

        Sierra 18-3599-2 Water Circulating Pump Sierra high-quality engine parts are designed to meet OEM specifications. Fits Both Standard and Counter Rotating Engines. Features: Fits GM V-6 (s/n 1A063239 & below) & V-8 (305, 350 & 377 CID)...

      • Mercury - Mercruiser Body 46-807151A14 Impeller Kit Thumbnail Image
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        $149.39
        $124.49

        Quicksilver 46-807151A14 Body Impeller Kit Quicksilver 807151A14 Sea Water Pump Body Kit is a complete replacement kit designed to service MerCruiser engines equipped with a plastic one-piece engine-mounted sea water pump. This kit includes the...

      • SALE
        Sierra 18-3017 Water Pump Impeller Replaces 47-89984T3
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        $26.29
        $18.99
        $11.99

        Sierra 18-3017 Water Pump Impeller for Mercury Sierra replacement water pump impeller for Mercury and MerCruiser engines. This impeller fits MCM and outboard applications. All Sierra engine parts are manufactured to meet or exceed OEM requirements...

      • SALE
        Sierra 18-3217 Impeller Kit Replaces 46-96148A8
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        $39.29
        $28.29
        $21.99

        Sierra 18-3217 Water Pump Repair Kit for MerCruiser, Mercury For #1 Units thru S/N D494568 (Similar to #46-96148A5 without base or housing) Used on MerCruiser Stern Drives and Mercury Outboards. This kit contains all the components needed to properly...

      • Quicksilver 47-8M0100526 Water Pump Kit Image
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        $68.99
        $57.49

        Quicksilver 47-8M0100526 Water Pump Kit Quicksilver 8M0100526 Water Pump Repair Kit is a genuine 13-piece water pump repair kit designed for a wide range of Mercury and Mariner outboards as well as MerCruiser Alpha One Gen II sterndrives. This complete...

      • Sierra 18-0897 Exhaust Manifold Elbow Gasket Replaces 27-863724
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        $11.29
        $9.09

        Sierra 18-0897 Mercruiser Exhaust Elbow Gasket Sierra engine parts are designed to meet OEM specifications. The 18-0897 Exhaust Elbow Gasket is a standard cooling, restrictor gasket. Fits 1981-1997 GM V-6 & V-8 engines with center rise outlet...

      • Sierra 18-3087 Impeller Replaces 47-59362T1
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        $32.09
        $23.09

        Sierra 18-3087 Water Pump Impeller for MerCruiser, Mercury For use on MerCruiser Bravo Sterndrives and Inboard engines with engine mounted sea water pumps (1999 & older)...

      • Sierra 18-3517 Water Pump Kit Replaces 46-60367A1
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        $62.49
        $44.99

        Sierra 18-3517 Water Pump Kit (Without Base) Sierra replacement water pump kit for Mercury and MerCruiser engines. Sierra high quality aftermarket parts are manufactured to meet or exceed OEM requirements. Fits: Mercury/Mariner 65 HP (4 cylinder)...

      • Mercury - Mercruiser 23-8M0214947 Thermostat Housing Sleeve Image
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        $14.99
        $13.99

        Mercury - Mercruiser 23-8M0214947 Thermostat Housing Sleeve Mercury Thermostat Sleeve is a direct replacement component designed for select MerCruiser sterndrive and inboard engines with standard cooling systems. The sleeve supports and properly...

      • Quicksilver 27-53045-1 Thermostat Housing Gasket for V-6 & V-8 Thumbnail Image
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        $4.99
        $4.49

        Quicksilver 27-53045-1 Thermostat Housing Gasket for V-6 & V-8 Thermostat housing gasket 530451 is for use on V6 and V8 MerCruiser sterndrive and inboard engines made by General Motors. It can also be used on Outboard Marine Corporation and Volvo...

      • Sierra 18-3056 Water Pump Impeller Replaces 47-43026T2
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        $28.69
        $20.69

        Sierra 18-3056 Water Pump Impeller Sierra high-quality engine parts are designed to meet OEM specifications. For Alpha I-Generation 2 s/n D494569 & above MerCruiser Vazer For 30/40/45/50/60 4-stroke Bigfoot, 60 (3 cyl.) Bigfoot, 75-125 (all 3...

      • Mercruiser 47-59362T-1 Impeller 1999 & Older Image
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        $47.39
        $39.49

        Quicksilver 47-59362T-1 Impeller 1999 & Older  Quicksilver 59362T1 Water Pump Impeller is a genuine replacement impeller designed for select MerCruiser engines equipped with engine-mounted sea water pumps with plastic housings. This impeller...

      • Quicksilver OEM MerCruiser V8 GM Exhaust Manifold Gasket 27-33395
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        $11.99
        $9.99

        Quicksilver 27-33395 MerCruiser V8 Exhaust Manifold Gasket OEM-quality exhaust manifold gasket for V8 MerCruiser sterndrive and inboard engines built by General Motors. Designed to maintain proper sealing and engine performance. Refer to your...

      • Sierra 18-2748 Exhaust Boot Replaces 32-44348001
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        $49.19
        $35.39

        Sierra 18-2748 MerCruiser 4" Upper Exhaust Boot Sierra high-quality engine parts are designed to meet OEM specifications. For use on MerCruiser Stern Drive engines. Features: Upper Tube: 4" Fits MCM 120, 140 & GM V-6 & V-8 engines Use...

      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!