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Mercruiser Cooling System

7439
guidebook

Parts Selection Guide

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Prop Selection Guide

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      • Sierra 18-4226 Drain Plug Replaces 22-806608A02
        List Price: $4.49
        Starting At: $3.49

        Sierra 18-4226 Mercruiser Blue Plastic Drain Plug This Sierra 18-4226 drain plug is widely used for Mercruiser V4, V6 and V8 marine engines. Fits Mercruiser cylinder blocks and exhaust manifolds Comes complete with o-ring Interchangeable...

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      • Sierra 18-3214 Impeller Kit Replaces 47-8M0100526
        List Price: $38.49
        Starting At: $26.99

        Sierra 18-3214 Impeller Repair Kit for Mercury, Mercruiser For Use On Alpa I Gen II, BF70, And BF90 S/N D494569 & Above. Kit Includes: (1) 18-2564 Water Pump Base to Face Plate Gasket (1) 18-2565 Water Pump Base to Gear Housing Gasket (1)...

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      • Sierra 18-1976-2 Mercruiser Manifold Elbow
        List Price: $172.99
        Starting At: $121.49

        Sierra 18-1976-2 Mercruiser Manifold Elbow Fits most Mercruiser V6 and V8 applications, 7 degree (4" O.D. Riser). Unlike automotive engines, all marine inboards have exhaust risers that feature a water induction elbow. Located behind the engine’s...

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      • Sierra 18-1953-2 Exhaust Manifold
        List Price: $254.49
        Starting At: $177.99

        Sierra 18-1953-2 Mercruiser V8 Exhaust Manifold Sierra exhaust manifolds are designed as OEM replacements and meet or exceed manufacturer’s requirements. Sierra replacement manifolds are fully interchangeable with the OEM products they are...

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      • Sierra 18-3087 Impeller Replaces 47-59362T1
        List Price: $22.99
        Starting At: $15.99

        Sierra 18-3087 Water Pump Impeller for Mercruiser, Mercury For use on Mercruiser Bravo Sterndrives and Inboard engines with engine mounted sea water pumps (1999 & older)...

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      • Water Pump Kit, Mercury - Mercruiser 47-43026Q06
        List Price: $72.49
        Starting At: $50.99

        Water Pump Repair Kit, Mercury - Mercruiser 47-43026Q06 Fits: 40/45/50/60 Fourstroke BigFoot 60 (3cyl) Bigfoot 75 - 125 (all 3 & 4 cylinder 0A996142 & above) 75, 90, 115 Fourstroke V-200/225/250 (3.0L) Mercruiser Alpha One Gen II...

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      • Impeller for 1999 & Older Mercruiser 47-59362T-1
        List Price: $45.99
        Starting At: $31.99

        Impeller for 1999 & Older Mercruiser 47-59362T-1 Fits Mercruiser engines with engine mounted sea water pumps (1999 & Older) Replaces: GLM 89740 Mallory 9-45375 OMC 0775517 Redline RL3087 Sie-18-3087  

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      • Sierra 18-3647 Thermostat Kit Replaces 807252Q5
        List Price: $34.99
        Starting At: $24.49

        Mercruiser 160 Degree Thermostat Kit by Sierra Kit Includes: Sie-18-3649 Thermostat Sie-18-2844 Thermostat Cover Gasket Sie-18-2552 Thermostat Cover Gasket Sie-18-2553 Thermostat Cover Gasket Sie-18-7173 O-Ring Sie-18-2917 Thermostat Housing Gasket ...

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      • Restrictor Elbow Gasket, Mercury - Mercruiser 27-863724
        List Price: $16.49
        Starting At: $10.14

        Restrictor Elbow Gasket, Mercury - Mercruiser 27-863724 Fits Center Riser manifolds. Commonly used on all raw water cooled engines. Creates back pressure by restricting the water flow, keeping the manifold full. For: 185, 205, 229 & 262 CID V-6...

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      • Sierra 18-1952-1 Exhaust Manifold Replaces 99746A17
        List Price: $303.99
        Starting At: $212.99

        Sierra 18-1952-1 Exhaust Manifold For Mercruiser V6 Engines. Fits Both Port or Starboard Sides. Mounting Gasket Included. Replaces: Barr MC-1-99746 GLM 51220 Mallory 9-40505 Mercruiser Stern...

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      • Sierra 18-0549 Plug Off Cap Replaces 3852476
        List Price: $10.99
        Starting At: $8.49

        Sierra 18-0549 Plug Off Cap 1" I.D. Sierra high quality engine parts are designed to meet OEM specifications. For V8 Stern Drives and Inboards 1977 - present. Interchangeable with: GLM 22290 Johnson/Evinrude...

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      • Sierra 18-3650 Thermostat Kit
        List Price: $24.49
        Starting At: $16.99

        Sierra 18-3650 Mercruiser 140 Degree Thermostat Kit  For Mercruiser Sterndrive engines using 140 degree thermostat. Fits 1998 & older MCM GM In-Line 4 & 6 cylinder engines. Kit Includes: (1) 18-2831 Thermostat Gasket (1) 18-3550...

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      • Impeller Kit for Brass Sea Water Pump Mercruiser 47-8M0104229
        List Price: $58.99
        Starting At: $41.49

        Impeller Kit for Brass Sea Water Pump Mercruiser 47-8M0104229 Fits 2000 & Newer MCM V-6 & V-8 (305, 350, & 496 cid) engines with the brass sea water pump Replaces: GLM 89700 Mallory 9-45310 Sierra 18-3016-1 Mercruiser...

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      • Sierra 18-3648 Thermostat Kit
        List Price: $26.99
        Starting At: $18.99

        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 18-2727 Exhaust Water Shutter Replaces 60930
        List Price: $29.99
        Starting At: $20.99

        Sierra 18-2727 Mercruiser Exhaust Water Shutter Sierra high-quality engine parts are designed to meet OEM specifications. Length: 3" Width: 3.780" Replaces: Mercruiser 60930 Mallory 9-42800 GLM 89165 Pro...

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      • Water Pump Impeller Mercury - Mercruiser 47-43026T-2
        List Price: $28.16
        Starting At: $25.36

        Water Pump Impeller, Mercury - Mercruiser 47-43026T-2 Fits: 30/40/45/50/60 hp Fourstroke Bigfoot 60 hp (3cyl) BigFoot 75 - 125 hp (all 3 & 4 cylinder models s/n A996142 and above) 75/90/115 hp FourStroke V-200 (3.0L) DFI V-225/250 (3...

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      • Water Pump Repair Kit, Mercury - Mercruiser 47-8M0100527
        List Price: $72.49
        Starting At: $50.99

        Water Pump Repair Kit, Mercury - Mercruiser 47-8M0100527 Fits: 40/45/50/60 Fourstroke BigFoot 60 (3cyl) Bigfoot 75 - 125 (all 3 & 4 cylinder 0A996142 & above) 75, 90, 115 Fourstroke V-200/225/250 (3.0L) Mercruiser Alpha One Gen II...

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      • Sierra 18-0389 Heat Exchanger End Gasket Replaces 27-99960
        List Price: $7.49
        Starting At: $5.49

        Sierra 18-0389 Mercruiser Heat Exchanger End Gasket Sierra high-quality engine parts are designed to meet OEM specifications. Fits: 3.7L w/ 4 inch heat exchanger. Diameter: 3-15/16" Interchangeable with: GLM 31830 Mercruiser Stern...

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      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.