Mercruiser Cooling System

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Parts Selection Guide

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Prop Selection Guide

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      • Mercury-Mercruiser 46-96148Q-8 Water Pump Kit
        $68.39
        $56.99

        Mercury-Mercruiser 46-96148Q-8 Water Pump Kit - No Base OEM Mercury-Mercruiser Quicksilver water pump upper repair kit. Fits Mercury/Mariner 65 HP (4-cylinder) through V-6 outboards with short-vane impellers Fits Mercruiser I/R/MR/Alpha drives (s/n...

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      • Sierra 18-3577-2 Circulating Water Pump Replaces 8504541
        $244.49
        $170.99

        Sierra 18-3577-2 Big Block Water Circulating Pump for Mercruiser, Volvo, OMC For: Big block GM engines with stamped steel timing covers (Bi-Directional) Used on Mercruiser, Crusader, OMC, Pleasurecraft and Volvo Penta Marine engines. s/s from...

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      • Sierra 18-1957-2 MerCruiser V8 1981-2002 Exhaust Manifold
        $374.99
        $239.99

        Sierra 18-1957-2 MerCruiser V8 GM 1981-2002 Exhaust Manifold - Replaces 807078T10 When in need of a Mercruiser manifold replacement, Wholesale Marine carries economical options to get you back on the water fast.  Sierra has engineered a...

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      • Sierra 18-71337 Circulating Pump Molded Hose Replaces 32-33189
        $76.99
        $53.99

        SIERRA 12 3/4" Circulating Pump Molded Hose 12 3/4" Overal Length, 1 3/4" ID Replaces: Mallory 9-44052, 9-44053 Mercury 32-33189, 32-806825, 32-861590A05 OMC Inboard & Stern Drive 0312781 Redline RL71337 Sierra 18-70944 For: 4...

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      • Sierra 18-3648 Thermostat Kit
        $32.99
        $22.99

        Sierra 18-3648 Mercruiser 160 Degree Thermostat Kit Sierra high-quality engine parts are designed to meet OEM specifications.  Temperature Rating: 160° Kit Contains: (1) 18-3649 Thermostat (1) 18-2553 Thermostat Cover Gasket (1)...

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      • Sierra 18-3569 Thermostat Kit Replaces 803061T1
        $32.49
        $22.99

        Sierra 18-3569 Mercury Thermostat Kit  Sierra replacement thermostat kits are designed to meet OEM specifications. This kit fits various Mercury/Mariner 70-125 HP 2 cycle outboards (1987 and newer). Temperature rating: 120°F Kit...

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      • Sierra 18-1908 Manifold Riser Spacer Replaces 93320A13
        $178.49
        $124.99

        Sierra 18-1908 Mercruiser Manifold Riser Spacer Mercruiser GM V6 229 and 262cu.in. (Models: 185 and 205) GM Small Block V8 305-350cu.in. (Models: 200, 228, 230, 260 and 898) GM Big Block V8 454cu.in. (Models: 330, 340 and 7.4L) Use With: Manifold:...

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      • Sierra 18-2733 Water Shutter Replaces 99370A2
        $33.49
        $23.49

        Sierra 18-2733 Mercruiser Water Shutter Sierra high-quality engine parts are designed to meet OEM specifications. Length: 3.175" Width: 2.5" Interchangeable with: GLM 89160 Mallory 9-42801 Mercruiser Stern...

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      • Sierra 18-15400 V-Belt Replaces 0311606
        $28.49
        $19.99

        V-belt for OMC, Volvo, Mercruiser 4 cyl Engines- Effective Length 40", Top Width 29/64" Details: High strength synthetic cords resist shockload failure. Their low stretch properties assure uniform performance over the life of the belt. The compression...

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      • Sierra 18-2732-9 Water Shutter (2Pk) Replaces 807166A3
        $93.99
        $65.99

        Mercruiser Water Shutters by Sierra (2 Pack) Used on Mercruiser engines THIS PART NUMBER IS FOR 2 SHUTTERS For 1 Shutter order SIE-18-2732   Replaces: Mercruiser 1438A1,14348,14348A2,807166A3 Mallory 9-42802 GLM 89170 Pro Marine 65166 ...

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      • Mercruiser 8M0113734 Water Circulating Pump Assembly
        $171.59
        $142.99

        Mercruiser 8M0113734 Water Circulating Pump Assembly Genuine OEM Mercury - Mercruiser part. Application: 4.3L Alpha 4V EST - s/n 1G417302 thru 1G499999 350 Horizon Bobtail - s/n 1G700000 thru 1G799999 350 MPI Alpha/Bravo - s/n 1G700000 thru...

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      • Sierra 18-710-16-2 Hose Clamp 1-1/16"-1-1/2"
        $3.99
        $2.99

        Sierra 18-710-16-2 Stainless Steel Hose Clamp 1-1/16" - 1-1/2" All components of the Sierra 18-710-16-2 Hose Clamp are manufactured from Marine Grade 316 stainless steel. Diameter Size: 11/16" to 1-1/2" Std #: 016 s/s from 18-7310

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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!