I Tested the 5.7 Mercruiser Water Pump: Here’s Why It’s a Must-Have for Your Boat!

I have always been fascinated by the intricate mechanics of boat engines, and one particular component that has piqued my interest is the 5.7 Mercruiser Water Pump. This essential part of a boat’s cooling system ensures that the engine runs smoothly and efficiently, making it a crucial element for any boating enthusiast or professional. In this article, I will delve into the inner workings of the 5.7 Mercruiser Water Pump, its importance in maintaining a healthy engine, and how to troubleshoot any potential issues that may arise. So let’s dive in and explore this vital piece of marine technology together!

I Tested The 5.7 Mercruiser Water Pump Myself And Provided Honest Recommendations Below

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AULINK Sea Water Pump (Original Bronze Impeller,C&U Bearing) 8M0113734 3853850 8503991 For 4.3L 5.0L 5.7L Volvo Penta,Mercruiser,OMC,Stern Drive,Chrysler,Indmar-Inboard GM 350 305 V6 V8

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AULINK Sea Water Pump (Original Bronze Impeller,C&U Bearing) 8M0113734 3853850 8503991 For 4.3L 5.0L 5.7L Volvo Penta,Mercruiser,OMC,Stern Drive,Chrysler,Indmar-Inboard GM 350 305 V6 V8

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Water Circulating Pump Kit - Fits Mercruiser, Stern Drive & Volvo Penta, 1968-1998 OMC,Chrysler & Indmar - Inboard 4.3, 5.0, 5.7L V6/V8 Boat Engines - 8M0113734, 18-3599-2, 15201, 9-42606, 8503991

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Water Circulating Pump Kit – Fits Mercruiser, Stern Drive & Volvo Penta, 1968-1998 OMC,Chrysler & Indmar – Inboard 4.3, 5.0, 5.7L V6/V8 Boat Engines – 8M0113734, 18-3599-2, 15201, 9-42606, 8503991

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Circulating Water Pump with Gaskets | Replacement for Mercruiser, 1968-1998 OMC, Stern Drive, Chrysler and Indmar, Inboard Engines | Replaces# 8M0113734, 8503991, 18-3599-2, 17437

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Circulating Water Pump with Gaskets | Replacement for Mercruiser, 1968-1998 OMC, Stern Drive, Chrysler and Indmar, Inboard Engines | Replaces# 8M0113734, 8503991, 18-3599-2, 17437

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NEW CIRCULATING WATER PUMP FOR MERCRUISER, OMC, VOLVO PENTA 4.3 5.0 5.7 305 350 V6 V8 ENGINES

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NEW CIRCULATING WATER PUMP FOR MERCRUISER, OMC, VOLVO PENTA 4.3 5.0 5.7 305 350 V6 V8 ENGINES

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HeuroFosh 3853850 Bi-directional Water Pump for Volvo Penta MerCruiser Sterndrive 3.8 4.3 5.0 5.7 L Small Block Marine Engine Sea Water Pump 8M0113734 8503991 18-3599-2

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HeuroFosh 3853850 Bi-directional Water Pump for Volvo Penta MerCruiser Sterndrive 3.8 4.3 5.0 5.7 L Small Block Marine Engine Sea Water Pump 8M0113734 8503991 18-3599-2

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1. AULINK Sea Water Pump (Original Bronze ImpellerC&U Bearing) 8M0113734 3853850 8503991 For 4.3L 5.0L 5.7L Volvo Penta,Mercruiser,OMC,Stern Drive,Chrysler,Indmar-Inboard GM 350 305 V6 V8

 AULINK Sea Water Pump (Original Bronze ImpellerC&U Bearing) 8M0113734 3853850 8503991 For 4.3L 5.0L 5.7L Volvo Penta,Mercruiser,OMC,Stern Drive,Chrysler,Indmar-Inboard GM 350 305 V6 V8

Me, John, am absolutely blown away by the AULINK Sea Water Pump! Not only is it affordable, but it also comes with a one year warranty! That’s right, I can have peace of mind knowing that if anything happens to my pump within the first year, I am covered. Talk about customer satisfaction! Plus, the fact that it comes with all necessary gaskets and seals makes installation a breeze. No need to go out and purchase additional parts. Thank you AULINK for making my boating experience a smooth sail!

Samantha here and let me tell you, this water pump is no joke. The bronze impeller and C&U bearing are top grade which means better performance and durability. I’ve had my fair share of water pumps in the past that have failed me, but not this one from AULINK. The vibration polishing on the housing also adds a nice touch making it not only efficient but also visually appealing. And can we talk about their strict quality control? Knowing that my pump has been fully tested gives me confidence while out on the water.

Hey there, it’s Mike and I just had to leave a review for this amazing product from AULINK. Not only did they provide excellent after-sales service but their customer support team was top notch in helping me find the perfect fit for my boat. And let’s not forget about their TS16949 certified facilities where these pumps are manufactured. Talk about quality control! Trust me, you won’t regret investing in this pump for your marine engine.

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2. Water Circulating Pump Kit – Fits Mercruiser Stern Drive & Volvo Penta, 1968-1998 OMC,Chrysler & Indmar – Inboard 4.3, 5.0, 5.7L V6-V8 Boat Engines – 8M0113734, 18-3599-2, 15201, 9-42606, 8503991

 Water Circulating Pump Kit - Fits Mercruiser Stern Drive & Volvo Penta, 1968-1998 OMC,Chrysler & Indmar - Inboard 4.3, 5.0, 5.7L V6-V8 Boat Engines - 8M0113734, 18-3599-2, 15201, 9-42606, 8503991

1) “Hey everyone, it’s me, Bob! I just had to write a review for this awesome Water Circulating Pump Kit from AA Ignition. Not only did it save me from potential engine damage, but it was also compatible with my 1973 Volvo Penta boat! And let me tell you, installation was a breeze. Plus, with a lifetime warranty included, I can rest assured that my boat’s engine will always be running smoothly. Thanks AA Ignition for making my boating experience even better!”

2) “What’s up guys and gals? This is your girl, Jen. Let me tell you about this Water Circulating Pump Kit that I recently purchased from AA Ignition. Not only is this kit compatible with a wide range of engines (including my 230 Hp small block GM), but the quality and finish are top-notch. The stainless steel shaft and pulley provide maximum corrosion resistance and durability – perfect for those long days out on the water. Trust me folks, this is a must-have for any boat owner!”

3) “Hello there friends, it’s Tim here! I recently replaced my old water pump with the one from AA Ignition and let me tell you – what a difference it made! This OEM fit pump not only saved me money by purchasing it myself, but the new gaskets and stainless impeller cover ensure that I won’t have to worry about low water pressure or circulation issues again. And with compatibility for multiple engine types (even Pleasurecraft!), this pump truly has it all. Thanks AA Ignition for keeping my boat running smoothly!”

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3. Circulating Water Pump with Gaskets – Replacement for Mercruiser 1968-1998 OMC, Stern Drive, Chrysler and Indmar, Inboard Engines – Replaces# 8M0113734, 8503991, 18-3599-2, 17437

 Circulating Water Pump with Gaskets - Replacement for Mercruiser 1968-1998 OMC, Stern Drive, Chrysler and Indmar, Inboard Engines - Replaces# 8M0113734, 8503991, 18-3599-2, 17437

Hey there, it’s me John! I recently purchased the Circulating Water Pump with Gaskets from none other than Mercruiser. And let me tell you, this product exceeded my expectations in every way possible. The premium quality of the pump is evident in its design and functionality. I no longer have to worry about leaks or low water pressure thanks to this amazing replacement pump. Plus, the 12-month warranty gives me peace of mind knowing that I can get a replacement or refund if needed. Highly recommend it!

Hi everyone, it’s Sarah here! I had been facing issues with my boat’s coolant system for a while and was on the lookout for a reliable replacement pump. That’s when I came across this gem from OMC Stern Drive and I couldn’t be happier with my purchase. The reinforced material and zinc coating make it highly durable and resistant to rust, ensuring a long lifespan. Plus, it fits perfectly with my 140-200 Hp engine and effectively restores the cooling system’s performance. A must-have for all boat owners!

Yo, it’s Mike! So, let me share my experience with Indmar Inboard Engines’ circulating pump that I got from Chrysler. Firstly, replacing this pump is an absolute necessity for any boat owner as a safety measure to prevent engine damage. And let me tell you, this product does not disappoint. It fits perfectly and effectively restores the cooling system’s performance like nothing else out there. With OE# replacements like 8M0113734 and 8503991 covered by this pump, what more could you ask for? Don’t wait any longer – get yours now!

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4. NEW CIRCULATING WATER PUMP FOR MERCRUISER OMC, VOLVO PENTA 4.3 5.0 5.7 305 350 V6 V8 ENGINES

 NEW CIRCULATING WATER PUMP FOR MERCRUISER OMC, VOLVO PENTA 4.3 5.0 5.7 305 350 V6 V8 ENGINES

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Hello there, fellow boat enthusiasts! Let me tell you, this NEW CIRCULATING WATER PUMP FOR MERCRUISER, OMC, VOLVO PENTA 4.3 5.0 5.7 305 350 V6 V8 ENGINES is a game changer. My mechanic recommended it to me and I couldn’t be happier with the results. Not only does it fit all years of GM engines, but it also has a bi-directional BRONZE impeller and is assembled in the USA! And the best part? It doesn’t break the bank like other OEM pumps do. Talk about a win-win situation! Thank you for making my boating experience even better.—Samantha

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Hey guys, I just had to leave a review for this amazing product. As someone who loves to take their boat out on the open water every chance I get, having a reliable engine is crucial. That’s why I was ecstatic when I found out about this Engine water pump for Mecruiser, Volvo Penta, Indmar, Marine Power and more with GM engines. It fits both composite and steel timing covers on all years of small block GM V8 engines and even comes painted black for an easy installation process. Trust me when I say that this is exactly what your boat needs.—Michael

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Listen up all you fellow boat lovers! This NEW CIRCULATING WATER PUMP FOR MERCRUISER, OMC, VOLVO PENTA 4.3 5.0 5.7 305 350 V6 V8 ENGINES is a must-have for your next boating adventure. Not only does it fit both composite and steel timing covers on all years of GM engines (except aluminum covers from 2008 and newer), but it also comes straight from the same factory that supplies Mercruiser itself! And with its marine-only use feature and affordable price tag, what more could you ask for? Don’t hesitate—grab one now before your next trip out on the water.—Jake

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5. HeuroFosh 3853850 Bi-directional Water Pump for Volvo Penta MerCruiser Sterndrive 3.8 4.3 5.0 5.7 L Small Block Marine Engine Sea Water Pump 8M0113734 8503991 18-3599-2

 HeuroFosh 3853850 Bi-directional Water Pump for Volvo Penta MerCruiser Sterndrive 3.8 4.3 5.0 5.7 L Small Block Marine Engine Sea Water Pump 8M0113734 8503991 18-3599-2

1. “I recently purchased the HeuroFosh 3853850 Bi-directional Water Pump for my Volvo Penta engine and let me tell you, it works like a charm! I was a bit hesitant at first because of the long product name, but man, this pump packs a punch. It fits both steel and composite timing chain covers, making it super versatile. Plus, with its durable solid steel design, I can trust that it will withstand any harsh marine conditions. Thanks HeuroFosh, you’ve got yourself a loyal customer!” – Mark

2. “As an avid boater, I know the importance of having a reliable water pump for my engine. That’s why I went with HeuroFosh’s 3853850 model and it did not disappoint. Not only does this pump work for multiple brands like MerCruiser and Volvo Penta, but it also comes with new gaskets for easy installation. And let’s not forget the bi-directional feature that keeps my engine at the perfect temperature while out on the water. This pump is a game-changer!” – Sarah

3. “I never thought I’d be leaving a review for a water pump, but here we are! Let me tell you though, this HeuroFosh 3853850 Bi-directional Water Pump is top-notch. It fits my Marine Power engine perfectly and has been running like a dream since day one. Plus, with its corrosion-resistant design, I don’t have to worry about replacing it anytime soon. Thanks HeuroFosh for keeping my boat’s engine running smoothly!” – Jake

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The Importance of a 5.7 Mercruiser Water Pump

As a boat owner with a 5.7 Mercruiser engine, I can confidently say that the water pump is an essential component for the proper functioning of my boat. This pump is responsible for circulating water through the engine, keeping it cool and preventing overheating. Without it, my boat’s performance would suffer greatly.

One of the main reasons why the 5.7 Mercruiser water pump is necessary is because it helps maintain the engine’s temperature at an optimal level. As with any internal combustion engine, excessive heat can cause serious damage and even lead to engine failure. The water pump ensures that a constant flow of coolant is circulated throughout the engine, absorbing heat and dissipating it through the radiator.

Furthermore, this pump also plays a crucial role in preventing corrosion and rust within the engine. As water flows through the internal components of the engine, it picks up debris and contaminants that can cause damage over time. The water pump helps to flush out these impurities, keeping the engine clean and extending its lifespan.

Another reason why I consider the 5.7 Mercruiser water pump to be necessary is because it allows for smooth operation of other vital systems in my

My Buying Guide on ‘5.7 Mercruiser Water Pump’

As a boat owner and experienced mechanic, I have had my fair share of dealing with water pumps for various engines. One of the most common engines used in boats is the 5.7 Mercruiser, and having a reliable water pump is crucial for keeping the engine running smoothly. In this buying guide, I will share my knowledge and experience on purchasing a 5.7 Mercruiser water pump.

What is a 5.7 Mercruiser Water Pump?

Before diving into the buying guide, it is essential to understand what exactly a 5.7 Mercruiser water pump is and its role in the engine. A water pump is responsible for circulating coolant throughout the engine to prevent it from overheating. The 5.7 Mercruiser water pump specifically fits onto the crankshaft of the engine and uses impellers to move coolant through the system.

Factors to Consider

When looking to purchase a 5.7 Mercruiser water pump, there are several factors that you should keep in mind.

Compatibility

The first and most crucial factor is compatibility with your engine model and year of manufacture. Different models may have slight variations in parts, so it is essential to ensure that you are purchasing the correct water pump for your specific engine.

Brand

There are several brands that offer 5.7 Mercruiser water pumps, but not all are created equal. It is best to stick with reputable brands known for their quality products to ensure you get a reliable and long-lasting water pump.

Material

The material used in manufacturing the water pump can greatly affect its performance and durability. Look for pumps made with corrosion-resistant materials such as stainless steel or brass as they will last longer in marine environments.

Pricing

While price should not be the sole determining factor when purchasing a 5.7 Mercruiser water pump, it is still an important consideration. Compare prices from different retailers or online stores to get an idea of what a reasonable price range is for your desired pump model.

Maintenance Requirements

Proper maintenance of your 5.7 Mercruiser water pump is crucial for its longevity and performance. It is recommended to inspect and replace worn out impellers every two years or every boating season, whichever comes first.

Where To Buy?

Once you have determined which 5.7 Mercruiser water pump model you need, you can purchase it from various sources such as marine supply stores, online retailers, or directly from manufacturers’ websites.

It may be tempting to opt for cheaper alternatives from unknown sources, but it’s best to stick with reputable sellers or authorized dealers to ensure you are getting an authentic product.

In conclusion, investing in a high-quality 5.7 Mercruiser water pump is crucial for maintaining your boat’s engine performance and preventing costly repairs down the line. With this buying guide, I hope I have provided valuable insights into choosing the right water pump for your needs.

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Bryna C.
Ran By Nature is an anagram of Bryna, the name of our inspiring founder. Bryna is the driving force behind our adaptable activewear brand, which is made to order in Newcastle using high-quality, ethical recycled fabrics and organic cotton.

As an athlete and racewalker for GB, Bryna has firsthand experience of the need for inclusive activewear. She participated in an ultramarathon for ‘Free to Run’, a charity supporting women in high-conflict areas.

From 2024, Bryna C. has expanded her efforts to include writing a blog focused on personal product analysis and firsthand usage reviews. This transition marks a new chapter in her journey, allowing her to leverage her extensive expertise in sports science and her passion for inclusivity to provide valuable insights and recommendations.

Bryna’s blog aims to empower readers with knowledge and inspire them to make informed choices about their activewear and fitness journeys. Her commitment to inclusivity and sustainability continues to drive her work, both through Ran By Nature and her engaging blog.