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Parts Selection Guide

Find the parts you need

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Prop Selection Guide

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      Mercruiser Cooling System

      • Sierra 18-2762 Exhaust Tube Replaces 70981A3
        $46.99
        $32.99

        Sierra 18-2762 Mercruiser Exhaust Elbow Tube Sierra high-quality engine parts are designed to meet OEM specifications. Fits MCM 470/485, 898, 228, 250, 260, 280, 330 & Ford 233 Interchangeable...

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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 18-3648 Thermostat Kit
        $31.99
        $22.49

        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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      • 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
        $237.49
        $165.99

        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 18-2733 Water Shutter Replaces 99370A2
        $31.99
        $22.49

        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 18-1957-2 Manifold Replaces 807078T10
        $363.49
        $232.99

        Sierra 18-1957-2 Mercruiser Manifold - Port & Starboard 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 manifold replacement kit that...

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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 18-3649 Thermostat Replaces 8M0091470
        $26.49
        $18.99

        Sierra 18-3649 Thermostat Sierra 18-3649 Thermostat is a replacement part for Mercruiser Stern Drives. All Sierra engine parts are manufactured to meet or exceed OEM requirements. Temperature Rating: 160°F For: Fresh water cooling Fits: 1987...

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      • Sierra 18-710-16-2 Hose Clamp 1-1/16"-1-1/2"
        $3.49
        $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 System

      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.

      We are Keeping 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 boats 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 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. We have everything you need to run preventative maintenance on your vessel and to upgrade your older parts. Water pumps, impellers, thermostats, gaskets, circulation pumps, shutter & 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. Peruse our selection today and give us a call with your questions at (877) 388-2628.