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      Mercruiser Cooling System Product Listings

      • Volvo Penta 3852111 Gasket
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        $6.79
        $6.39

        Volvo Penta 3852111 Thermostat Housing Gasket Genuine OEM Volvo Penta part. Fits: Volvo Penta 4.3L (All Models) Volvo Penta 5.7L (All Models Except OSi) Volvo Penta 5.8L (All Models) Mercury...

      • Sierra 18-15490 V-Belt
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        $65.29
        $46.99

        Sierra 18-15490 Mercruiser V-Belt Sierra replacement V-Belt for use on Mercruiser Stern Drives. High strength synthetic cords resist shockload failure. Their low stretch properties...

      • Sierra 18-43017 Thermostat
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        $31.99
        $22.99

        Sierra 18-43017 Thermostat Sierra replacement thermostat for Indmar GM and Ford Raw Water Cooled Engines. Fits: MCM 496 Mag & HO and MIE 8.1L & HO 160° Interchangeable...

      • Sierra 18-710-48-2 Hose Clamp 2-9/16"-3-1/2"
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        $5.39
        $4.59

        Sierra 18-710-48-2 Hose Clamp 2-9/16"-3-1/2" Manufactured from Marine Grade 316 Stainless Steel. s/s from Sierra part 18-7314 Diameter Size: 2-9/16" to 3-1/2" Std #: 048 Interchangeable with: ...

      • Sierra 18-3593 Water Pump
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        $162.29
        $116.89

         Sierra 18-3593 Water Pump Bi-Directional water pump. Fits: Late Model 4 cyl. GM engines requiring hose fitting, GM In-line 4 & 6 cyl. Interchangeable with: Mercruiser Stern...

      • Sierra 18-1843 MerCruiser V8 Dry Joint Exhaust Manifold
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        $655.89
        $472.29

        Sierra 18-1843 MerCruiser V8 Dry Joint Exhaust Manifold Replaces 8M0185794 All Sierra manifolds are manufactured as a direct OE replacement and are fully interchangeable with the OEM products they...

      • Sierra 18-3557 Thermostat Replaces 47594
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        $38.79
        $32.19

        Sierra 18-3557 Thermostat Sierra replacement 143° thermostat for Chrysler/Force/US Marine, Johnson/Evinrude Outboards, Mercrusier Stern Drives, and Volvo Penta engines. Fits MCM GM in-line 6...

      • Sierra 18-1508 Thermostat Seal
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        $1.19
        $0.97

        Sierra 18-1508 MerCruiser Thermostat Seal Replaces 25-8071341 This Sierra aftermarket thermostat seal is for use with MerCruiser V6/V8 GM engines that feature closed cooling. Application...

      • Sierra 18-70938 Exhaust Manifold Molded Hose
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        $56.59
        $40.69

        Sierra 18-70938 Exhaust Manifold Molded Hose Sierra replacement exhaust manifold molded hose for Mercruiser Stern Drives. For thermostat housing to port exhaust manifold Fits MCM/MIE GM V06 &...

      • Sierra 18-1908K Manifold Riser Spacer Kit Replaces 93320A13
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        $553.59
        $398.59

        Sierra 18-1908K Manifold Riser Spacer Kit Features:  Packaged as a set, complete with mounting hardware Fits: MCM V-6 carb & TBI eng. w/ 2 piece exhaust manifolds (s/n 0M614999 & below) 3"...

      • Sierra 18-1956-3 MerCruiser 2.5L/3.0L Exhaust Manifold
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        $698.19
        $502.69

        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...

      • Sierra 18-3555 Thermostat Replaces 99155T2
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        $27.69
        $19.89

        Sierra 18-3555 Mercruiser 160 Degree Thermostat Sierra replacement thermostat for Mercruiser Stern Drives Temperature Rating: 160°F Fits 1998 & newer GM V-6 & V-8 engines with closed...

      • Transom to Oil Cooler Hose, GM V-8 Mercury - Mercruiser 32-96246A-4
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        $73.99
        $64.99

        Mercury MerCruiser 32-96246A-4 Transom to Oil Cooler Hose The Mercury MerCruiser 32-96246A-4 Transom to Oil Cooler Hose is a replacement hose designed for select MCM GM V-8 marine engines. This hose...

      • 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 18-0164-9 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 18-0885-1 Exhaust Elbow Gasket
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        $10.99
        $7.99

        Sierra 18-0885-1 Exhaust Elbow Gasket For use on Mercruiser outboard engines Replaces:  27-48042 s/s from 18-0885

      • Sierra 18-15116 Serpentine Belt Replaces 57-861758Q
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        $111.49
        $80.29

        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:...

      • 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...

      • Sierra 18-2912-1 Exhaust Manifold Gasket Replaces 27-53354
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        $21.69
        $16.89

        Sierra 18-2912-1 Exhaust Manifold Gasket for Mercruiser, OMC, Volvo 3.0L Replaces: Merc - 27-53354 Mallory - 61417 GLM - 31570 OMC 0908079 Aqua Power 325 GLM 31570 Redline RL1203  

      • 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...

      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!