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      Mercruiser Cooling System Product Listings

      • Quicksilver 8M0150724 Pulley Sea Water Pump Image
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        $127.79
        $106.49

        Quicksilver 8M0150724 Pulley Sea Water Pump Quicksilver 8M0150724 Water Pump Pulley is designed for select MerCruiser sterndrive and inboard engines equipped with a brass seawater pump. Manufactured...

      • Sierra 18-1997-1 Universal Center Riser Exhaust Manifold
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        $443.59
        $319.39

        Sierra 18-1997-1 Universal Center Riser Exhaust Manifold This Sierra is a universal exhaust manifold for engines with center risers. Constructed from cast iron for maximum durability, this manifold...

      •  Sierra 1983-2002 MerCruiser V8 Small Block GM Exhaust Manifold Kit
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        $1,321.95
        $813.96

        Sierra 1983-2002 MerCruiser V8 Small Block GM Exhaust Manifold Kit Boat exhaust manifolds are an important part of your boat and maintaining, repairing, or replacing these parts is important to keep...

      • Sierra 18-70932 Molded Hose Thermostat To Starboard Manifold
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        $41.09
        $29.59

        Sierra 18-709325 Molded Hose for Mercruiser Sierra high-quality replacement molded hose for Mercruiser Stern Drives. Used for thermostat cover to starboard manifold. Fits 4.3L/LX & MCM/MIE V-8...

      • Quicksilver 8M0109441 Thermostat Image
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        $35.39
        $29.49

        Quicksilver 8M0109441 Thermostat - 160°F Quicksilver 8M0109441 Replacement 160°F Thermostat is designed for select GM-based MerCruiser engines with standard cooling systems requiring a 160-degree...

      • Circulating Pump Hose-Molded, GM V-8 Mercury - Mercruiser 32-89718-1
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        $78.99
        $69.49

        Mercury - Mercruiser 32-89718-1 Circulating Pump Molded Hose GM V-8 Genuine OEM Mercury - Mercruiser part. Fits MCM/MIE GM V-8 (427, 454 & 502 cid) engines

      • Sierra 18-70925 Molded Hose Replaces 32-160211
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        $38.59
        $27.79

        Sierra 18-70925 Molded Hose for Mercruiser Stern Drives. Replacement molded hose for Mercruiser Stern Drives. For Thermostat Cover to Port Manifold. Fits MCM/MIE V-6 & V-8 (305 & 350 cid) engines...

      • Sierra 18-7715 MerCruiser V8 Fuel Filter Replaces 8M0204703
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        $47.69
        $34.29

        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...

      • Sierra 18-70958 Molded Hose
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        $69.79
        $50.19

        Sierra 18-70958 Molded Hose Sierra replacement molded hose for Mercruiser Stern Drives. For transom to oil cooler Fits MCM GM V-8 (305, 350 & 454 CID) engines Interchangeable...

      • 48 " V Belt, Mercury - Mercruiser 57-48122Q
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        $32.99
        $28.99

        Mercury-MerCruiser 48122Q V-Belt - 48 Inch The Mercury-MerCruiser 48122Q V-Belt is a replacement belt for compatible MerCruiser sterndrive and inboard engines. This 48 inch / 1,219 mm V-belt is the...

      • Quicksilver Impeller Repair Kit, Mercury - Mercruiser 47-89984Q-5 Image
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        $64.79
        $53.99

        Quicksilver Impeller Repair Kit, Mercury - Mercruiser 47-89984Q-5 Quicksilver 89984Q5 Water Pump Repair Kit is a complete 14-piece kit designed to restore cooling system performance on select...

      • Sierra 18-75100 Molded Hose 48" Replaces 32-89749
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        $37.29
        $26.89

        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.:...

      • Sierra 18-0327 Water Pump Gasket Replaces 27-33956
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        $3.09
        $2.59

        Sierra 18-0327 Water Pump Gasket for 4 & 6 cyl. Mercruiser, Volvo, OMC For 4 & 6 Cylinder Stern Drive and Inboard Engines. Interchangeable with: GLM 31350 Mallory 9-60067 Mercruiser...

      • Sierra 18-3646 Thermostat Kit Replaces 807252Q3
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        $36.99
        $26.59

        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...

      • Sierra 18-15460 V-Belt Replaces 57-48120Q1
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        $38.29
        $29.89

        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 ...

      • Sierra 18-15410 V-Belt Replaces 57-64032Q1
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        $30.39
        $21.89

        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...

      • Sierra 18-3651 Thermostat Kit
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        $30.09
        $21.59

        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...

      • Sierra 18-2949-9 Exhaust Manifold Gasket (Priced Per Pkg Of 2)
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        $36.39
        $26.19

        Sierra Exhaust Manifold Gasket Special Order Item est. 10 Days Priced 2 per package For use on Volvo Penta I/O Engines: AQ200, 225, 260, 271, 290, 311 V-8 Supersedes 18-2949 Replace

      • Mercury - Mercruiser 27-863725-1 Gasket
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        $16.79
        $13.99

        Quicksilver OEM MerCruiser V6/V8 Exhaust Manifold Elbow Gasket 27-863725-1 This genuine OEM Mercruiser elbow gasket is for use with 5.0L, 5.7L, 7.4L, 8.2L GM engines with a center rise outlet...

      • Mercury - Mercruiser 46-77177A-3 Water Pump Kit Image
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        $133.19
        $110.99

        Quicksilver 46-77177A-3 Water Pump Kit Quicksilver 77177A3 Water Pump Repair Kit is a comprehensive replacement kit designed to restore the cooling system on select Mercury and Mariner 30-70 HP...

      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!