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      Mercruiser Cooling System Product Listings

      • Quicksilver OEM MerCruiser V6/V8 1998-2001 Exhaust Elbow Gasket 27-863726
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        $22.19
        $18.49

        Quicksilver 27-863726 MerCruiser V6/V8 1998-2001 Exhaust Elbow Gasket  Full-flow, 4-slot exhaust elbow gasket designed for GM-based MerCruiser V6 and V8 sterndrive and inboard engines (1998–2001) with center rise outlet exhaust...

      • Sierra 18-3647 Thermostat Kit Replaces 807252Q5
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        $44.19
        $31.79

        Sierra 18-3647 160° MerCruiser Thermostat Kit Replaces 807252Q5 Features: Fits: 1987 & newer GM engines with standard cooling Temperature Rating: 160°F Kit Includes: Sie-18-3649 Thermostat Sie-18-2844 Thermostat Cover...

      • Sierra 18-4367 Exhaust Manifold Gasket Set Replaces 27-99777A1
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        $40.19
        $28.99

        MerCruiser 4Cyl Exhaust Manifold Gasket Set by Sierra For GM 153 & 181 (2.5 & 3.0L) CID Engines; 120 & 140 HP - S/N 6229718 & UP (With Siamese Port Cylinder Heads) Interchangeable...

      • Sierra 18-3147 Water Pump Kit Replaces 817275k05
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        $175.19
        $126.09

        Sierra 18-3147 MerCruiser Alpha Gen II Water Pump Kit Sierra high-quality engine parts are designed to meet OEM specifications. For use with Gen II Lower S/N D469859 and Up. Kit Includes: Carrier Seal 18-2354 Impeller 18-3056 Impeller Plate...

      • Quicksilver 27-863724 MerCruiser Exhaust Elbow Restrictor Gasket Thumbnail Image
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        $15.59
        $12.99

        Quicksilver OEM MerCruiser V6/V8 1981-1997 GM Exhaust Elbow Restrictor Gasket 27-863724 Quicksilver Standard cooling restrictor-type exhaust elbow gasket for GM-based MerCruiser V6 and V8 sterndrive and inboard engines (1981–1997) with center rise...

      • Sierra 18-4349 Exhaust Manifold Gasket Set
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        $41.89
        $30.19

        Sierra 18-4349 Mercruiser V8 Exhaust Manifold Gasket Set Sierra high-quality engine parts are designed to meet OEM specifications. For GM 200, 228, 230, 260, 898 (5.0 & 5.7L). Set Contains: (2) 18-0872 Exhaust Manifold Gasket (2) 18-0897...

      • Sierra 18-3016-1 Impeller Kit Replaces 47-862232A2
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        $38.79
        $27.89

        Sierra 18-3016-1 Impeller Kit For Use On Late-Model Bravos & High Performances. Sierra replacement engine parts are manufactured to meet or exceed OEM requirements. Features: Includes gasket Includes O-Ring Use with 18-3160-1 Sea Water...

      • Sierra 18-2849-1 Exhaust Manifold Elbow Gasket Replaces 27-818832
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        $14.69
        $12.49

        Sierra 18-2849-1 MerCruiser Exhaust Elbow Gasket Standard cooling, full flow 4 slot gasket. For use on MerCruiser 1998-2001 GM V-6 & V-8 with center rise outlet exhaust manifolds. Interchangeable with: Barr  MC 47 27...

      • Sierra 18-0549 Plug Off Cap Replaces 3852476
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        $15.19
        $12.99

        Sierra 18-0549 Plug Off Cap 1" I.D. Sierra high quality engine parts are designed to meet OEM specifications. Features:   I.D.: 1" or 25.4mm For V8 Stern Drives and Inboards 1977 - present. Interchangeable...

      • Sierra 18-3668 Thermostat Kit
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        $50.39
        $36.29

        Sierra 18-3668 Thermostat Kit for Mercruiser Stern Drives For Mercruiser engines using 142 degree thermostats Fits 1983 & newer GM V-6 & V-8 engines with standard cooling Includes: (1) Thermostat Cover Gasket (18-2552) (1) Thermostat...

      • Quicksilver 47-43026T-2 Water Pump Impeller
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        $37.19
        $30.99

        Quicksilver 47-43026T-2 Water Pump Impeller  Quicksilver 43026T2 Water Pump Impeller is a genuine replacement impeller designed for select Mercury OptiMax, FourStroke, Verado outboards, and MerCruiser Alpha One Gen II and Vazer drives. This...

      • 41674T
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        $4.99

        Mercury-MerCruiser 41674T Water Tube Pick-Up Insert The Mercury-MerCruiser 41674T Water Tube Pick-Up Insert is a genuine OEM replacement component for compatible Mercury and MerCruiser cooling system applications. This insert is designed to replace the...

      • Sierra 18-4224 Drain Manifold Elbow Assembly Replaces 22-8622210A01
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        $12.19
        $9.49

        Sierra 18-4224 MerCruiser V6/V8 Drain Elbow Assembly Sierra high-quality engine parts are designed to meet OEM specifications.  Features: Includes Drain 3/4" NPT Fits MCM/MIE V-6 & V-8 engines with center rise exhaust...

      • Sierra 18-1952-1 Exhaust Manifold Replaces 99746A17
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        $425.29
        $263.69

        Sierra 18-1952-1 MerCruiser V6 85-02 Exhaust Manifold  Replaces 99746A17 This Sierra exhaust manifold is for MerCruiser V6 Engines made by GM between 1985 and 2002. Features: Fits: MerCruiser V6 GM 229 & 262 CID engines built between 1985...

      • Sierra 18-0389 Heat Exchanger End Gasket Replaces 27-99960
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        $12.09
        $10.29

        Sierra 18-0389 MerCruiser Heat Exchanger End Gasket Sierra high-quality engine parts are designed to meet OEM specifications. Features: Fits: 3.7L w/ 4 inch heat exchanger. Diameter: 3-15/16" Interchangeable with: GLM 31830 MerCruiser...

      • Mercury/MerCruiser 8M0100527 Water Pump Repair Kit
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        $74.99
        $62.49

        Mercury 8M0100527 MerCruiser  Water Pump Repair Kit  This OEM water pump repair kit is for use with a wide variety of Mercury outboards and MerCruiser sterndrives. This complete kit contains gaskets, o-rings, plates, seals, an...

      • Sierra 18-3551  Marine Thermostat
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        $20.99
        $15.09

        Sierra 18-3551 142 Degree Thermostat for Mercruiser, Crusader,PCM When needing to replace your thermostat, we recommend Sierra high-quality engine parts as they are designed to meet OEM specifications at an economical price. The Sierra thermostats are...

      • Quicksilver 27-99777-2 Exhaust Elbow Gasket Image
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        $3.99

        Quicksilver 27-99777-2 Exhaust Elbow Gasket Exhaust elbow gasket 997772 is for use on 120 series (1983 and newer), 140/3.0L inline 6-cylinder and V8 small block (1982 and older) MerCruiser sterndrive and inboard engines made by General Motors with...

      • Sierra 18-2746 Exhaust Boot Replaces 32-14358001
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        $56.19
        $40.49

        Sierra 18-2746 MerCruiser Exhaust Boot Sierra 18-2746 Exhaust Boot fits MCM GM V-6 & V-8 engines. 4" Lower Tube Interchangeable with: GLM 89130 Mallory 9-72811 MerCruiser Stern...

      • Mercury - Mercruiser Water Shutter Assy 807166A-1 Image
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        $103.79
        $86.49

        Quicksilver 807166A1 Water Shutter For MerCruiser V6 & V8 Engines With 2-Piece Exhaust Manifolds Quicksilver 807166A1 Water Shutter is designed for select MerCruiser V6 and V8 engines with 2-piece exhaust manifolds. This exhaust shutter acts as a...

      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!