Mercruiser Cooling System

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Parts Selection Guide

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      • Quicksilver 57-865615Q03 Serpentine Belt
        $161.99
        $134.99

        Quicksilver 57-865615Q03 Serpentine Belt Genuine OEM Mercury-Mercruiser part. Direct replacement serpentine belt for Mercruiser Stern Drives. Belt is 704 mm long and is easy to install. Fits: 350 MAG MPI Alpha/Bravo 350 MAG MPI Alpha/Bravo EC 350...

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      • Sierra 18-0488 Intake Gasket
        $62.99
        $43.99

        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 Drive 27-807473A1 Volvo...

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      • Sierra 18-3237 Water Pump Kit
        $56.99
        $39.99

        Sierra 18-3237 Mercruiser Water Pump Kit Sierra high-quality engine parts are designed to meet OEM specifications. For Bravo I, II, III (1988 & up). s/n B664190 & up. For Bravo drives with 1 piece housing Kit Contains: (1) 18-3087...

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      • Mercruiser 805218T Coolant Temp Sensor
        $69.59
        $57.99

        Mercruiser 805218T MCM/MIE EFI Coolant Temperature Sensor Assy Used for temperature gauge. Fits MCM/MIE EFI models Replaces: Mallory 9-42402 Redline RL7600 Sierra 18-7600

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      • Sierra 18-0164-9 Thermostat Housing Gasket (Priced Per Pkg Of 2)
        $3.99
        $3.49

        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 Sterndrive I/O Interchangeable...

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      • Sierra 18-1956-3 MerCruiser 2.5L/3.0L Exhaust Manifold
        $633.99
        $443.99

        Sierra 18-1956-3 MerCruiser 2.5L/3.0L Exhaust Manifold Replaces 860235A04 This sierra exhaust manifold features a one piece design and is for use with MerCruiser 2.5L/3.0L engines. Used With: Riser with Exhaust Tube 18-1975-1 Exhaust Manifold...

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      • Sierra 18-15116 Serpentine Belt Replaces 57-861758Q
        $98.49
        $68.99

        Sierra 18-15116 Serpentine Belt Use with metal 5-3/4" dia. p/s pump pulley and engines with standard cooling. Sierra engine components are manufactured to meet or exceed OEM requirements. Length: 86.75" Width: 13/16" Interchangeable...

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      • Sierra 18-3318 Water Pump Kit Replaces 47-59362Q08
        $89.49
        $62.49

        Sierra 18-3318 Water Pump Kit Special Order est. 10 Days For Use on Mercruiser I/O Engines Fits:  Plastic 1 and 2 piece sea water pump body Contains: Impeller 18-3087 Wear Plate 18-3350 Wear Plate 18-3351 Water Pump Body...

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      • Mercruiser Alpha One Gen II Water Pump Rebuild Kit 817275K05
        $214.19
        $178.49

        Mercury - Mercruiser 817275K05 Water Pump Upper Rebuild Kit Genuine OEM Mercury-Mercruiser part. Rebuild kit contains all required components to replace the water pump impeller and the upper pump housing. Fits all Mercruiser Alpha One Gen II drives...

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      • Sierra 18-3568 Thermostat Kit Replaces 99155T1
        $26.99
        $18.99

        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 Contains: (1) 18-3555 Thermostat (1) 18-1508...

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      • EMP 22-05154 Volvo/MerCruiser Drain Plug
        $10.55
        $8.79

        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, all model gearcases For MerCruiser 1975-2000...

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      • Sierra 18-15520 V-Belt Replaces 0912714
        $35.99
        $25.49

        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 resist shockload...

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      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!