Mercruiser Cooling System

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Parts Selection Guide

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      • 48 " V Belt, Mercury - Mercruiser 57-48122Q
        $31.99
        $27.99

        Mercury - Mercruiser 57-48122Q V Belt 48"  Genuine OEM Mercury - Mercruiser part. 48 in. length (1219mm) Interchangeable with: Aqua Power 1542 Mallory 9-55003 Sierra 18-15480

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      • Sierra 18-3646 Thermostat Kit Replaces 807252Q3
        $35.49
        $24.99

        Sierra 18-3646 Mercruiser 140 Degree Thermostat Kit Sierra high-quality replacement engine parts are designed for OEM specifications. For 1982 & older Ford & GM V-8 engines with standard cooling and 1996 & older hi-performance models. Fits...

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      • Sierra 18-15460 V-Belt Replaces 57-48120Q1
        $33.99
        $25.99

        Mercruiser, OMC and Volvo V-Belt - Effective Length: 46" Top Width: 29/64" Replaces: Mercury - 57-48120A-1, 57-48120Q 1 OMC - 0310953, 0909971 Volvo - 829207, 966920 Mallory 9-55002 Redline RL15460 Details: High strength synthetic cords...

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      • Sierra 18-75100 Molded Hose 48" Replaces 32-89749
        $33.99
        $23.99

        Sierra 18-75100 OMC Molded Straight Hose Sierra high-quality engine parts are designed to meet OEM specifications. For thermostat housing to exhaust manifolds and elbows. Length: 48" I.D.: 1" Interchangeable with: Johnson/Evinrude...

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      • Quicksilver 8M0109441 Thermostat
        $34.19
        $28.49

        Quicksilver 8M0109441 Thermostat - 160°F Quicksilver replacement thermostat for use with 1987 and newer GM engines with standard cooling requiring the use of a 160 degree thermostat. Quicksilver's high quality parts are tested through some of the...

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      • Sierra 18-15410 V-Belt Replaces 57-64032Q1
        $26.99
        $18.99

        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 compression section is a special rubber compound that...

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      • Sierra 18-15112 Serpentine Belt Replaces 57-865615Q04
        $105.99
        $73.99

        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 with: Mercruiser Stern...

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      • Sierra 18-3651 Thermostat Kit
        $26.99
        $18.99

        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 Thermostat Cover Gasket (1) 18-2554 Thermostat Cover...

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      • Sierra 18-3221 Water Tube Replaces 32-860220
        $17.49
        $11.99

        Sierra 18-3221 Mercruiser Alpha Gen II Water Tube Sierra high-quality replacement water tube for Mercruiser Alpha Gen II Cooling Systems. Interchangeable with: GLM 12829 Mallory 9-44010 Mercruiser Stern...

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      • Sierra 18-8520 Exhaust Manifold Mounting Kit
        $24.49
        $17.49

        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, 260, 898) Used with: Manifold: 18-1950-1,18-1951-1,...

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      • Sierra 18-7715 MerCruiser V8 Fuel Filter Replaces 8M0204703
        $42.49
        $29.99

        Sierra 18-7715 MerCruiser V8 Fuel Filter Replaces 8M0204703 This fuel filter is designed for use in MerCruiser V8 Gen III fuel systems. It is recommended to change this filter and your 18-7977-1 Fuel Filter at the same time for optimal engine...

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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!