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Parts Selection Guide

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Prop Selection Guide

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      Mercruiser Cooling System

      • Mercruiser V6 Dry Joint Exhaust Manifold
        $566.39
        $471.99

        Mercruiser 864612T01 V6 Dry Joint Exhaust Manifold Mercruiser OEM replacement exhaust manifold. For 4.3 Liter V-6 engines. Replaces: Pro Marine 64612 Mallory 9-40509 Mercruiser Manifold Installation Video

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      • Sierra 18-3506-1 Circulating Pump
        $269.49
        $204.99

        Sierra 18-3506-1 Circulating Pump Sierra replacement circulating pump for V6 Sterndrives. All Sierra aftermarket engine parts are manufactured to meet or exceed OEM requirements. For V6 MCM (s/n 1A063240 & up); Newer 4.3L w/o water bypass...

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      • Sierra 18-710-20-2 Hose Clamp 13/16" - 1-3/4"
        $4.99
        $3.99

        Sierra 18-710-20-2 Hose Clamp 13/16" - 1-3/4" Material: Marine Grade 316 stainless steel Diameter: 13/16" to 1 3/4" Std #: 020 Sold individually Interchangeable with: Mercruiser Stern Drive 54-32780 54-32880 54-815504220

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      • Sierra 18-8533 Exhaust Manifold Mounting Kit
        $29.99
        $20.99

        Sierra 18-8533 Mercruiser Exhaust Manifold Mounting Kit Sierra high-quality engine parts are designed to meet OEM specifications. For Mercruiser GM V6 229 and 262cu in. (Models 185 and 205). Used with Manifold 18-1952-1. Interchangeable...

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      • Sierra 18-0398-9 Thermostat Gasket (Priced Per Pkg Of 2)
        $6.99
        $5.49

        Sierra 18-0398-9 Thermostat Gasket (Priced Per Pkg Of 2) Sierra replacement thermostat gasket for Mercruiser, Volvo Penta, and OMC Stern Drives. Use with aluminum exhaust manifold. Fits: 110/120 & 140/150/160 (I/L 6 cyl.) also MCM 3.0L/LX...

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      • Sierra 18-0891 Water Pump Mounting Gasket
        $0.61
        $0.49

        Sierra 18-0891 Water Circulating Pump Mounting Gasket for GM Engines Sierra high-quality water circulating pump mounting gasket for GM V-6 & V-8 (305, 350 & 377 cid) engines. Interchangeable with: Chris-Craft 16...

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      • Sierra 18-0928-1-9 Manifold End Cap Gasket (2 Pk)
        $20.49
        $14.49

        Sierra 18-0928-1-9 Manifold End Cap Gasket (2 Pk) Sierra replacement manifold end cap gasket used on Mercruiser engines. Fits: MCM/MIE 120/2.5L, 140/3.0L, 165 (I/L 6 cyl.), 470, 898, 228 & 260 Sold as a pack of 2 Interchangeable...

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      • Sierra 18-15550 V-Belt Replaces 57-13458Q
        $36.49
        $29.49

        Sierra 18-15550 V-Belt Sierra V-Belts are designed to meet or exceed OEM requirements. Their low stretch properties assure uniform performance over the life of the belt.  High strength synthetic cords resist shockload Special rubber compound...

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      • Sierra 18-1842 V6 Dry Join Exhaust Manifold
        $446.99
        $312.99

        Sierra 18-1842 V6 Dry Join Exhaust Manifold The Sierra V6 Dry Join Exhaust Manifold helps ensure water does not enter the cylinders in the case of a gasket failure. Water is transferred from the manifold to the riser externally. Can be used with the OE...

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      • Sierra 18-1939 Riser
        $274.49
        $191.99

        Sierra 18-1939 Riser  Sierra replacement engine parts are designed to meet OEM specifications. Use with 3-1/2" I.D. exhaust hose. Material: Cast iron Ford Small Block V8 302-351 cu. in. GM Small Block V8 305-350 cu. in. GM Big Block V8 454 cu...

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      • Sierra 18-1956-3 Mercruiser Manifold
        $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 18-3552 Thermostat Replaces 76270T
        $24.99
        $17.49

        Sierra 18-3552 Thermostat for Mercruiser and Crusader Engines Sierra replacement thermostat for Crusader and Mercruiser engines. Temperature Rating: 160°F For: Fresh Water Cooling Fits: 470/485 models (s/n 6218036 and below) Interchangeable...

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      • Sierra 18-70929 Molded Hose
        $30.49
        $24.49

        Sierra 18-70929 Molded Hose Sierra high-quality engine parts are designed to meet OEM specifications. This molded hose is for thermostat housing to starboard manifolds. Fits MCM/MIE GM V-8 (305 & 350 cid) engines. Interchangeable...

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      • Pack of 2 EMP 22-22000-2 MerCruiser Drain Plug
        $4.02
        $3.35

        EMP 22-22000-2 MerCruiser Drain Plug Pack of 2 This drain plug is intended for use with MerCruiser manifolds and meets all OEM requirements. Widely used for draining cooling system for winterization. Drain Plug Application: Fits MerCruiser manifold...

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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.