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      Mercruiser Cooling System Product Listings

      • Sierra 18-0164-9 Thermostat Housing Gasket (Priced Per Pkg Of 2)
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        $4.69
        $3.69

        Sierra 18-0164-9 Thermostat Housing Gasket (Pkg Of 2) Sierra replacement thermostat housing gasket. Sold in Package of 2 each For Use on: OMC Sterndrive/Cobra 4 & 6 Cylinder Engines Yamaha...

      • Sierra 18-0488 Intake Gasket
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        $72.09
        $51.89

        Sierra 18-0488 Intake Gasket Special Order est. 10 Days For use on Mercruiser I/O engines Fits:  MCM 350 Mag, 5.0L & 5.7L/LX Gen II (1996-up)  Interchangeable with:  Mercruiser Stern...

      • Quicksilver 807166A-3 Water Shutter Assembly Image
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        $120.59
        $100.49

        Quicksilver 807166A3 Water Shutter For MerCruiser Sterndrive Exhaust Systems Quicksilver 807166A3 Water Shutter is designed to replace two offset plate water shutters and fits numerous MerCruiser...

      • Sierra 18-2833-9 Exhaust Elbow Gasket (Priced Per Pkg Of 2)
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        $11.59
        $9.09

        Sierra 18-2833-9 MerCruiser Exhaust Elbow Gasket (Priced Per Pkg Of 2) These exhaust elbow gaskets are designed for use with MerCruiser engines. Application Info Fits MerCrusier V8 Ford...

      • Sierra 18-0956 Exhaust Manifold Gasket Replaces 27-68715
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        $26.19
        $20.49

        Sierra 18-0956-1 Mercruiser, OMC, Volvo Exhaust Manifold Gasket For Ford 460 cid V-8 & 3.7L (4 cyl) Interchangeable with: Chrysler...

      • Quicksilver 140 Degree Thermostat Kit Mercury - Mercruiser 59078Q-3 Image
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        $38.99
        $32.49

        Quicksilver 140 Degree Thermostat Kit Mercury - Mercruiser 59078Q-3 Quicksilver 59078Q3 Thermostat Kit is a genuine replacement thermostat designed for older MerCruiser GM inline 4-cylinder and...

      • Sierra 18-2909-9 Exhaust Manifold Gasket (Priced Per Pkg Of 2)
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        $24.49
        $17.59

        Sierra 18-2909-9 Exhaust Manifold Gasket (Priced Per Pkg of 2) This exhaust manifold gasket set is an aftermarket product that meets or exceeds OEM requirements. Supersedes 18-2909 Use...

      • Manifold Assy, Mercury - Mercruiser 8m0080805
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        $130.49
        $114.99

        Mercury-MerCruiser 8M0137703 Hydraulic Manifold Assembly The Mercury-MerCruiser 8M0137703 Hydraulic Manifold Assembly is a genuine OEM replacement hydraulic component for compatible Mercury and...

      • EMP 22-05154 Volvo/MerCruiser Drain Plug
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        $11.99
        $9.99

        EMP 22-05154 Volvo/MerCruiser Drain Plug This drain plug is intended for use with Volvo, MerCruiser, & Indmar gearcases and meets all OEM requirements. Drain Plug Application: For Volvo all years,...

      • Mercruiser 32-160211 T-stat Hsg to Port Exhaust Manifold Hose V-6/V-8
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        $40.99
        $35.99

        Mercruiser 32-160211 T-stat Hsg to Port Exhaust Manifold Hose V-6/V-8, T-stat Hsg to Port Exhaust Manifold Hose 1" I.D. at ends of hose Fits MCM/MIE V-6 & V-8 (305 & 350)...

      • Sierra 18-3568 Thermostat Kit Replaces 99155T1
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        $29.69
        $21.39

        Sierra 18-3568 Thermostat Kit Sierra replacement thermostat kit for Mercruiser Stern Drives. Temperature Rating: 160° Fits GM V-6 & V-8 engines with closed cooling (1998 & newer) Kit...

      • Sierra 18-15520 V-Belt Replaces 0912714
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        $40.89
        $29.49

        OMC, Mercruiser V-Belt - Effective Length 52", Top Width 29/64" Replaces: Mallory 9-55001 Mercury 57-34359, 57-37619Q, 57-37619 OMC 0912714, 0509287, 0509288 Details: High strength synthetic cords...

      • Sierra 18-15101 Serpentine Belt
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        $119.89
        $86.29

        Sierra 18-15101 Mercruiser Serpentine Belt Length: 76.5" Width: 13/16" Interchangeable with: Mercruiser Stern Drive 57-863876...

      • Sierra 18-4258 Pipe Plug
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        $6.79
        $5.69

        Sierra 18-4258 MerCruiser Pipe Plug Sierra stainless steel pipe plug with square drive. Note: Pipe sealant with Teflon is recommended for use on plug threads. Thread Size: 3/4" - 14 NPT Use...

      • Quicksilver 27-858524 Water Pump Gasket Image
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        $3.49

        Quicksilver 27-858524 Water Pump Gasket Quicksilver Water pump gasket 858524 is for use on MerCruiser 1, R, MR and Alpha One sterndrives (serial No. 2495186-0D469858), Mercury and Mariner 65hp...

      • Quicksilver 99155T-1 Thermostat Kit Image
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        $42.49
        $37.49

        Mercury-MerCruiser 991551T1 160°F Thermostat Kit The Mercury-MerCruiser 991551T1 Thermostat Kit is designed for 1998 and newer MerCruiser marinized V6 and V8 engines made by General Motors that use...

      • Sierra 18-1845 MerCruiser V6/V8 Dry-Joint Exhaust Elbow
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        $518.09
        $372.99

        Sierra 18-1845 MerCruiser V6/V8 GM Dry-Joint Exhaust Elbow Replaces 864591T02 This Sierra aftermarket exhaust elbow is for use with Mer Cruiser V6/V8 GM engines with dry joint exhaust manifolds...

      • Sierra 18-1937 MerCruiser 3.7L Exhaust Manifold Elbow
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        $399.79
        $311.79

        Sierra 18-1937 MerCruiser 3.7L Exhaust Manifold Elbow Replaces 98562A6 This Sierra exhaust manifold elbow is for use with MerCruiser 3.7L engines. Application Info: MerCruiser 4 Cyl 224 cu. in. 3...

      • Sierra 18-0398-9 Thermostat Gasket (Priced Per Pkg Of 2)
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        $7.69
        $6.59

        Sierra 18-0398-9 Thermostat Gasket (Priced Per Pkg Of 2) Sierra replacement thermostat gasket for Mercruiser, Volvo Penta, and OMC Stern Drives. Use with aluminum exhaust manifold. Fits: 110/120 &...

      • Sierra 18-1989 MerCruiser V8 Thermostat Housing
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        $358.29
        $257.99

        Sierra 18-1989 MerCruiser V8 Thermostat Housing Features: Material: Stainless Steel Fits: MCM/MIE GM V-8 (454 & 502 cid) engines Special Order est. 10 Days 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!