Mercruiser Cooling System

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Parts Selection Guide

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Prop Selection Guide

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Mercruiser Water Pumps & Impellers

Mercruiser Water Pumps & Impellers
Mercruiser Thermostats & Gaskets

Mercruiser Thermostats & Gaskets
Mercruiser Water Circulating Pumps

Mercruiser Water Circulating Pumps
Mercruiser Water Shutter & Exhaust Tubes

Mercruiser Water Shutter & Exhaust Tubes
Mercruiser Exhaust Manifolds

Mercruiser Exhaust Manifolds
Mercruiser Hoses

Mercruiser Hoses
Mercruiser Serpentine Belts

Mercruiser Serpentine Belts
Mercruiser V-Belts

Mercruiser V-Belts
Mercruiser Thermostat Housing

Mercruiser Thermostat Housing
      • Sierra 18-1992-1 Manifold Elbow Adapter
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        Sierra 18-1992-1 Manifold Elbow Adapter

        $325.99
        $227.99

        Sierra 18-1992-1 Manifold Elbow Adapter Sierra high-quality engine parts are designed to meet OEM specifications. For 3" I.D. Exhaust Hose. 80° Interchangeable with: Barr 200087P Mallory 9-40120

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      • Sierra 18-1956-3 Mercruiser Manifold
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        Sierra 18-1956-3 Mercruiser Manifold Replaces 860235A04

        $653.99
        $457.49

        Sierra 18-1956-3 Mercruiser Exhaust Manifold Replacement manifold for Mercruiser Stern Drives. Features a 1 piece design. s/s from 18-1956-1, 18-1956-2 Supplied with mounting package Used With: 18-1975-1 Riser with Exhaust Tube 18-1204-1...

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      • Sierra 18-15119 Serpentine Belt Replaces 57-865615Q01
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        Sierra 18-15119 Serpentine Belt Replaces 57-865615Q01

        $76.49
        $57.99

        Sierra 18-15119 Mercruiser Serpentine Belt Sierra replacement serpentine belt for Mercruiser Stern Drives. Width: 13/16" Length: 111.25" Applications: 496 Mag & HO 2000-04 OM025000 & up Interchangeable with: Mercruiser Stern...

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      • Sierra 18-75125 Straight Hose 48" Replaces 32-848956
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        Sierra 18-75125 Straight Hose 48" Replaces 32-848956

        $49.99
        $34.99

        Sierra 18-75125 Straight Hose 48" for Mercruiser, Volvo, and OMC Engines Sierra high-quality engine parts are designed to meet OEM specifications Length: 48" I.D.: 1-1/4" Fits MIE Ford V-8 (302 & 351 cid) engines. Also fits MCM/MIE GM...

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      • Mercruiser Alpha One Gen II Water Pump Rebuild Kit 817275K05
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        Mercury - Mercruiser 817275K05 Water Pump Rebuild Kit

        $196.19
        $163.49

        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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      • Quicksilver 57-865615Q03 Serpentine Belt
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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 18-4258 Pipe Plug
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        Sierra 18-4258 Pipe Plug

        $5.99
        $4.49

        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 With: 18-1949 Manifold Spacer 18-1984 Manifold...

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      • Mercruiser 32-87117-1 Exhaust Manifold Hose
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        Mercruiser 32-87117-1 Exhaust Manifold Hose

        $42.99
        $37.49

        Mercruiser 32-87117-1 Exhaust Manifold Hose  Genuine OEM Mercury - Mercruiser replacement hose. 1" I.D. at one end; 13/16" I.D. at other end of hose Fits: 4.3L/LX and MCM/MIE V-8 (305 & 350 cid)...

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      • Sierra 18-15101 Serpentine Belt
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        Sierra 18-15101 Serpentine Belt

        $104.49
        $72.99

        Sierra 18-15101 Mercruiser Serpentine Belt Length: 76.5" Width: 13/16" Interchangeable with: Mercruiser Stern Drive 57-863876 4 57-862086A1 57-862086 57-8620861 57-865615004 57-865615Q04

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      • Sierra 18-70948 Molded Hose
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        Sierra 18-70948 Molded Hose

        $50.99
        $35.49

        Sierra 18-70948 Mercruiser Molded Hose Sierra 18-70948 Molded Hose is for cooler to thermostat housing. Sierra high-quality replacement engine parts are designed to meet OEM quality. Fits MCM/MIE V-6 & V-8 (305, 350 & 377 cid) engines...

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      • Sierra 18-0183-1 Exhaust Manifold Gasket
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        Sierra 18-0183-1 Exhaust Manifold Gasket

        $16.99
        $12.99

        Sierra 18-0183-1 Exhaust Manifold Gasket for Mercruiser, OMC Sierra Exhaust Manifold Gasket for use on Mercruiser and OMC Stern Drives. Fits MCM/MIE Ford V-8 engines Use With: 18-1996 Manifold 18-1998-1 Manifold 18-1962-1...

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      • Sierra 18-0342 Power Trim Hose Connector Plate Gasket
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        Sierra 18-0342 Power Trim Hose Connector Plate Gasket

        $1.99
        $1.49

        Sierra 18-0342 Power Trim Hose Connector Plate Gasket Sierra 18-0342 Power Trim Hose Connector Plate Gasket is a replacement part for Mercruiser Stern Drives. Interchangeable with: Barr MC472747644 GLM 31470 Mercruiser Stern...

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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, Wholesale Marine has all you need.

      Wholesale Marine Keeps it Cool!

      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. Now 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 your MerCruiser cooling system. Ready to get started? Check out our easy-to-use Parts Selection tool to quickly get you exactly what you are searching for.

      For keeping that sterndrive, inboard, or tow sport engine cool come rain or shine, you can depend on Wholesale Marine to provide high quality 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!