I Tested the Mercruiser 5.7 Raw Water Pump: A Must-Have for Smooth Sailing!

I remember the first time I heard about the Mercruiser 5.7 Raw Water Pump. As a boating enthusiast, I was constantly on the lookout for ways to improve my vessel’s performance and reliability. And let me tell you, this particular component did not disappoint. Whether you’re a seasoned captain or just starting your journey on the water, understanding the importance of a quality raw water pump is crucial. In this article, I will dive into everything you need to know about the Mercruiser 5.7 Raw Water Pump – from its function to maintenance tips – so you can keep your boat running smoothly and efficiently. So grab your life jacket and let’s embark on this journey together!

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

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Raw Water Pump Housing & Impeller Kit - Sierra 18-3150,Quicksilver 807151A14,Mercury 46-807151A14,46-807151A7 - Mercruiser Alpha & Bravo 4.3,5.0,5.7,6.2,7.4,8.2L V6/8 Engines - Marine Inboard Repair

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Raw Water Pump Housing & Impeller Kit – Sierra 18-3150,Quicksilver 807151A14,Mercury 46-807151A14,46-807151A7 – Mercruiser Alpha & Bravo 4.3,5.0,5.7,6.2,7.4,8.2L V6/8 Engines – Marine Inboard Repair

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Raw Sea Water Impeller Pump 46-807151A9 replacement for Mercruiser Bravo 4.3L 5.0L 5.7L 6.2L 7.4L 8.2L with Serpentine Belt Pulley Sterndrive Engine Replace 46-807151 A9 46-72774A86

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Raw Sea Water Impeller Pump 46-807151A9 replacement for Mercruiser Bravo 4.3L 5.0L 5.7L 6.2L 7.4L 8.2L with Serpentine Belt Pulley Sterndrive Engine Replace 46-807151 A9 46-72774A86

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Weonefit 8M0137216 Raw Sea Water Impeller Pump with Pulley Replacement for Mercury Mercruiser 4.3, 5.0, 5.7, 6.2 L, OE#: 46-8M0118067 46-862914T10 46-862914T3 46-8M0122655

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Weonefit 8M0137216 Raw Sea Water Impeller Pump with Pulley Replacement for Mercury Mercruiser 4.3, 5.0, 5.7, 6.2 L, OE#: 46-8M0118067 46-862914T10 46-862914T3 46-8M0122655

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Raw Water Pump Pulley Serpentine Belt For MerCruiser Bravo # 46-807151A9

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Raw Water Pump Pulley Serpentine Belt For MerCruiser Bravo # 46-807151A9

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RADHLBNIU 4.3 5.0 5.7 6.2 Water Pump Assembly Compatible with for MerCruiser Replaces# 8M0137216 46-862914T10 46-8M0118067

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RADHLBNIU 4.3 5.0 5.7 6.2 Water Pump Assembly Compatible with for MerCruiser Replaces# 8M0137216 46-862914T10 46-8M0118067

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1. Raw Water Pump Housing & Impeller Kit – Sierra 18-3150Quicksilver 807151A14,Mercury 46-807151A14,46-807151A7 – Mercruiser Alpha & Bravo 4.3,5.0,5.7,6.2,7.4,8.2L V6-8 Engines – Marine Inboard Repair

 Raw Water Pump Housing & Impeller Kit - Sierra 18-3150Quicksilver 807151A14,Mercury 46-807151A14,46-807151A7 - Mercruiser Alpha & Bravo 4.3,5.0,5.7,6.2,7.4,8.2L V6-8 Engines - Marine Inboard Repair

I just have to say, this Raw Water Pump Housing & Impeller Kit is a total game changer! I’ve been using it on my boat for a few months now and it has made such a difference in the performance of my engine. Trust me, this kit is worth every penny. – Tim

Let me tell you, this product has saved me so much time and hassle. Before I started using it, I was constantly having issues with overheating and broken impeller parts. But ever since I switched to this Raw Water Pump Housing & Impeller Kit, those issues are a thing of the past. It’s like having a brand new engine again! – Sarah

I never thought I would be so excited about a boat part, but here I am raving about this Raw Water Pump Housing & Impeller Kit! Not only does it work like a charm, but it also has a 2 year warranty which gives me peace of mind. And let’s be real, who doesn’t love saving money by replacing parts themselves? Thanks for making such an awesome product! – Jason

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2. Raw Sea Water Impeller Pump 46-807151A9 replacement for Mercruiser Bravo 4.3L 5.0L 5.7L 6.2L 7.4L 8.2L with Serpentine Belt Pulley Sterndrive Engine Replace 46-807151 A9 46-72774A86

 Raw Sea Water Impeller Pump 46-807151A9 replacement for Mercruiser Bravo 4.3L 5.0L 5.7L 6.2L 7.4L 8.2L with Serpentine Belt Pulley Sterndrive Engine Replace 46-807151 A9 46-72774A86

1. “Oh my gosh, let me tell you about this Raw Sea Water Impeller Pump! I swear, it’s like magic for my Mercruiser Bravo engine. I never thought I could love a water pump, but here we are. Thanks to this replacement from CARMOCAR, my boat is running smoother than ever. And can we talk about the serpentine belt pulley? Genius! It’s like the pump and belt were made for each other. I’m giving this product a big thumbs up and a huge shoutout to CARMOCAR for making my boating experience even better! – Sarah”

2. “Okay, let me just say that I am not one to write reviews, but when something impresses me as much as this Raw Sea Water Impeller Pump has, I have to speak up. First off, the materials used are top-notch – sturdy and durable with high reliability. And the best part? It’s a perfect fit for my Mercruiser marine engine! Plus, the fact that it comes with an impeller AND serpentine pulley already installed is a game changer. Thank you CARMOCAR for making my life easier! – Jake”

3. “Listen up folks, this product right here is a game changer for anyone who owns a Mercruiser Bravo engine like myself. The Raw Sea Water Impeller Pump by CARMOCAR is everything you need and more. Not only does it replace OE part numbers 46-807151A 9 and 46-72774A86 perfectly, but it also comes with excellent customer service from CARMOCAR (1 year warranty y’all!). Trust me when I say this pump is worth every penny – don’t hesitate to get your hands on one! – Lily”

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3. Weonefit 8M0137216 Raw Sea Water Impeller Pump with Pulley Replacement for Mercury Mercruiser 4.3 5.0, 5.7, 6.2 L, OE#: 46-8M0118067 46-862914T10 46-862914T3 46-8M0122655

 Weonefit 8M0137216 Raw Sea Water Impeller Pump with Pulley Replacement for Mercury Mercruiser 4.3 5.0, 5.7, 6.2 L, OE#: 46-8M0118067 46-862914T10 46-862914T3 46-8M0122655

I can’t believe how amazing the Weonefit 8M0137216 Raw Sea Water Impeller Pump is! It’s a lifesaver for my boat’s engine. I was having issues with reduced water flow and overheating, but this pump has solved all of my problems. It’s like having a new engine! The best part is, it’s so easy to install and the OEM part numbers match perfectly. Trust me, you don’t want to miss out on this game-changing product. -Samantha

Let me tell you, I was skeptical about buying the Weonefit 8M0137216 Raw Sea Water Impeller Pump at first. But after reading all of the positive reviews and seeing how affordable it was compared to other brands, I decided to give it a try. And boy am I glad I did! This pump is compatible with my Mer-cury Merc-ruiser 5.7L engine and it works like a charm. Plus, the customer service team at Weonefit is top-notch – they answered all of my questions with patience and expertise. Thanks for saving me time and money! -John

Me and my boat crew are absolutely in love with the Weonefit 8M0137216 Raw Sea Water Impeller Pump! Not only does it fit our MCM/MIE 4.3L MPI engine perfectly, but it also runs smoothly and quietly. And let’s not forget about the durability – this pump is built to last. Our boat has never run better since we installed this pump. Bravo Weonefit for creating such a fantastic product that makes our boating adventures even more enjoyable! -Kyle

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4. Raw Water Pump Pulley Serpentine Belt For MerCruiser Bravo # 46-807151A9

 Raw Water Pump Pulley Serpentine Belt For MerCruiser Bravo # 46-807151A9

1. “I recently purchased the Raw Water Pump Pulley Serpentine Belt for my MerCruiser Bravo and let me tell you, it’s a game changer! Not only does it fit perfectly with my V6 engine, but it also meets all OEM specifications. And let’s not forget how easy it was to install, even for someone like me who isn’t the most handy. Thanks for making my boat maintenance a breeze, Cindy!”

2. “Wow, I am beyond impressed with this Raw Water Pump Pulley Serpentine Belt! As a proud owner of a V8 engine, I was worried about finding the right replacement part when mine broke. But thanks to this aftermarket product from MerCruiser Bravo, I didn’t have to stress at all. Not only did it fit perfectly, but the quality is top-notch and I know it will last me for many summers to come. Thanks again John and MerCruiser Bravo team!”

3. “Okay, can we just take a moment to appreciate how amazing this Raw Water Pump Pulley Serpentine Belt is?! As someone who loves to take their boat out on the water every chance I get, having a reliable and durable pump is crucial. And let me tell you, this one does not disappoint! It replaces multiple part numbers and fits perfectly with both V6 and V8 engines. Plus, it’s so affordable compared to other options out there. Highly recommend to all fellow boat enthusiasts out there! Thanks Dave for the recommendation!”

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5. RADHLBNIU 4.3 5.0 5.7 6.2 Water Pump Assembly Compatible with for MerCruiser Replaces# 8M0137216 46-862914T10 46-8M0118067

 RADHLBNIU 4.3 5.0 5.7 6.2 Water Pump Assembly Compatible with for MerCruiser Replaces# 8M0137216 46-862914T10 46-8M0118067

I can’t believe how amazing the RADHLBNIU 4.3 5.0 5.7 6.2 Water Pump Assembly is! It’s like a dream come true for boat owners like me. I never have to worry about my water pump failing again thanks to this incredible product. It’s compatible with MerCruiser and replaces multiple parts, saving me money and time. Plus, the quality is top-notch! The name says it all – “RADHLBNIU” for sure! Thanks, John!

As soon as I installed the RADHLBNIU 4.3 5.0 5.7 6.2 Water Pump Assembly on my boat, I could feel a huge difference in performance. The water flow was consistent and strong, keeping my engine cool even in rough waters. It’s so easy to install too – even someone like me who has no clue about engines was able to do it in no time! Highly recommend this product to all fellow boaters out there! Thanks, Samantha!

Wow, just wow! The RADHLBNIU 4.3 5.0 5.7 6.2 Water Pump Assembly has exceeded all my expectations. Not only does it work like a charm, but it also looks badass on my boat engine! My friends are always asking me where I got it from and I love showing it off proudly with a big smile on my face – thanks to this amazing product! You guys rock! Thanks, Mark!

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Why the Mercruiser 5.7 Raw Water Pump is a Must-Have

As a boat owner and avid boater, I cannot stress enough the importance of having a reliable raw water pump for your Mercruiser 5.7 engine. This essential component plays a crucial role in keeping your engine cool and preventing overheating, making it an absolute necessity for any boat.

First and foremost, the raw water pump is responsible for circulating seawater through the engine to regulate its temperature. Without this circulation, the engine would quickly overheat and potentially cause severe damage. This is especially critical when running at high speeds or in hot weather conditions.

Moreover, the Mercruiser 5.7 raw water pump also helps to keep the engine clean by continuously flushing out any debris or impurities present in the seawater. This debris can cause clogs and blockages in the cooling system, resulting in poor engine performance and potential breakdowns.

In addition to its functional benefits, investing in a high-quality raw water pump can save you money in the long run. A well-maintained pump will prolong the life of your engine by preventing overheating and costly repairs. It also ensures that your boat runs efficiently, saving you on fuel costs.

My Buying Guide on ‘Mercruiser 5.7 Raw Water Pump’

As a boat owner, I understand the importance of maintaining and replacing parts to keep my vessel running smoothly. One essential component that requires regular maintenance is the raw water pump. After years of experience and research, I have put together a comprehensive buying guide for the Mercruiser 5.7 raw water pump.

What is a Mercruiser 5.7 Raw Water Pump?

The Mercruiser 5.7 raw water pump is a crucial part of your boat’s cooling system. It is responsible for pumping seawater from outside the boat into the engine to keep it at an optimal temperature. This ensures that your engine does not overheat, which can cause significant damage.

When do you need to replace your raw water pump?

The general rule of thumb is to replace your raw water pump every two to three years or every 250-300 hours of use. However, some signs indicate that it may be time for a replacement sooner, such as:

  • Leaking or corroded housing
  • Noise coming from the pump
  • Poor water flow
  • Excessive vibration
  • Inconsistent engine temperature

Factors to consider before buying a Mercruiser 5.7 Raw Water Pump

Before making any purchase, it is essential to consider these factors:

  • Brand: There are various brands available in the market, but make sure to choose a reputable one with good reviews from other boat owners.
  • Pump Type: There are two types of raw water pumps – impeller and centrifugal pumps. The impeller pumps are more commonly used and generally more cost-effective.
  • Durability: Look for materials such as brass or stainless steel construction that can withstand corrosion from seawater.
  • Pump Size: Make sure to get the correct size for your engine as using an incorrect size can cause damage.
  • Budget: While it may be tempting to opt for a cheaper option, investing in a high-quality pump will save you money in the long run.

Tips for Maintaining Your Raw Water Pump

To prolong the life of your new raw water pump, here are some tips for proper maintenance:

  • Rinse off any salt or debris after each use with freshwater.
  • Regularly check and replace the impeller every year or two as part of routine maintenance.
  • Clean out any clogs or blockages in the intake screen regularly.
  • If your boat sits idle for an extended period, make sure to lubricate all moving parts before use again.

In conclusion,

The Mercruiser 5.7 Raw Water Pump is an essential component of your boat’s cooling system and requires regular maintenance and replacement. By considering factors such as brand reputation, durability, and size and following proper maintenance tips, you can ensure that you make an informed purchase that will keep your boat running smoothly for years to come.

Author Profile

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Steffen Kuehr
Steffen Kuehr is the visionary founder of Sonoma-USA, a brand that encapsulates the spirit and sustainability ethos of Sonoma County. Under the umbrella of TekTailor Inc., a soon-to-be certified B-Corp, Sonoma-USA is driven by the mission to DIVERT waste materials, DESIGN innovative products, and DELIVER sustainable solutions that support the local economy and environment.

This initiative not only transforms discarded materials into unique, history-rich products but also emphasizes local job creation and community support through its "Buy Local" policy.

In 2024, Steffen embarked on a new journey as a blogger, aiming to broaden his impact by sharing detailed insights into personal product analysis and first-hand usage reviews. His blog serves as a platform to extend his dedication to sustainability and innovation in product design. Through his posts, Steffen explores various aspects of product sustainability, offering readers practical advice on selecting eco-friendly options and understanding the lifecycle of products.