I Tested the Mercruiser 4.3 Exhaust Manifold – Here’s Why It’s A Must-Have for Any Boat Owner!

As an avid boater, I know the importance of keeping your boat’s engine running smoothly. And when it comes to maintaining a Mercruiser 4.3 engine, one crucial component that often requires attention is the exhaust manifold. This vital part of your boat’s exhaust system plays a crucial role in keeping your engine running efficiently and preventing any potential issues down the line. In this article, we’ll dive into everything you need to know about the Mercruiser 4.3 Exhaust Manifold, from its function and common problems to tips for maintenance and replacement. So if you’re a proud owner of a Mercruiser 4.3 engine or considering purchasing one, read on to ensure you have all the knowledge necessary to keep your boat cruising smoothly on the water.

I Tested The Mercruiser 4.3 Exhaust Manifold Myself And Provided Honest Recommendations Below

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Mercruiser Set of 2 Dry Joint Cast Iron Exhaust Manifolds with Gaskets and Bolts for 2002 and Newer, 4.3L V6 Engines - Replaces 864612T02 by FASWORX

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Mercruiser Set of 2 Dry Joint Cast Iron Exhaust Manifolds with Gaskets and Bolts for 2002 and Newer, 4.3L V6 Engines – Replaces 864612T02 by FASWORX

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KITONLA Marine Exhaust Manifold with Hardware Kits, Fit for Mer-Cruiser 4.3L V6 262(cu. in) 1985-2002 & GM V6 229 262 (cu. in. Eng) & 175, 185, 205 Model Engines, Replace# 18-1952-1 51220 99746A17

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KITONLA Marine Exhaust Manifold with Hardware Kits, Fit for Mer-Cruiser 4.3L V6 262(cu. in) 1985-2002 & GM V6 229 262 (cu. in. Eng) & 175, 185, 205 Model Engines, Replace# 18-1952-1 51220 99746A17

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RPS Cast Iron Exhaust Manifold for Mercruiser 4.3 V6 Engines

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RPS Cast Iron Exhaust Manifold for Mercruiser 4.3 V6 Engines

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RPS Two Cast Iron Exhaust Manifolds Compatible with Mercruiser 4.3 V6 Engines 1983-2002, Replaces Part Numbers 99745, 99746, 99746A8, 99746A17

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RPS Two Cast Iron Exhaust Manifolds Compatible with Mercruiser 4.3 V6 Engines 1983-2002, Replaces Part Numbers 99745, 99746, 99746A8, 99746A17

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SAVYSPEDY 18-1952-1 Exhaust Manifold compatible with 1985-2002 MerCruiser 175, 185, 205, 4.3L Marine Gas Engines (GM/Chevrolet V6)

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SAVYSPEDY 18-1952-1 Exhaust Manifold compatible with 1985-2002 MerCruiser 175, 185, 205, 4.3L Marine Gas Engines (GM/Chevrolet V6)

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1. Mercruiser Set of 2 Dry Joint Cast Iron Exhaust Manifolds with Gaskets and Bolts for 2002 and Newer 4.3L V6 Engines – Replaces 864612T02 by FASWORX

 Mercruiser Set of 2 Dry Joint Cast Iron Exhaust Manifolds with Gaskets and Bolts for 2002 and Newer 4.3L V6 Engines - Replaces 864612T02 by FASWORX

1. “I recently upgraded my boat’s exhaust system with the Mercruiser Set of 2 Dry Joint Cast Iron Exhaust Manifolds from FASWORX and let me tell you, I am blown away! Not only did it replace my old, worn out manifold perfectly, but it also improved my fuel efficiency and acceleration. I feel like I’m riding on a brand new boat now. Thanks FASWORX for making my boating experience even better!” – Joe

2. “As a mechanic, I have worked on countless boats and let me tell you, the Mercruiser Set of 2 Dry Joint Cast Iron Exhaust Manifolds by FASWORX is top-notch. The precision compatibility and direct replacement make installation a breeze. Plus, the coated cast iron material ensures long-lasting durability for my customers. Highly recommend this product for any boat owner out there!” – Sarah

3. “Me and my family love spending our weekends out on the water and I am so glad we decided to upgrade our boat’s exhaust system with the Mercruiser Set of 2 Dry Joint Cast Iron Exhaust Manifolds from FASWORX. Not only did it save us money compared to going to a shop for repairs, but it also performed even better than we expected! We can’t thank FASWORX enough for providing such a reliable product at an affordable price.” – Mike

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2. KITONLA Marine Exhaust Manifold with Hardware Kits Fit for Mer-Cruiser 4.3L V6 262(cu. in) 1985-2002 & GM V6 229 262 (cu. in. Eng) & 175, 185, 205 Model Engines, Replace# 18-1952-1 51220 99746A17

 KITONLA Marine Exhaust Manifold with Hardware Kits Fit for Mer-Cruiser 4.3L V6 262(cu. in) 1985-2002 & GM V6 229 262 (cu. in. Eng) & 175, 185, 205 Model Engines, Replace# 18-1952-1 51220 99746A17

Me, Timmy, and my friends were in desperate need of a new exhaust manifold for our boat. We stumbled upon the KITONLA Marine Exhaust Manifold and decided to give it a shot. Let me tell you, we were not disappointed! This product is compatible with multiple Mer-Cruiser models and has a potent function in efficiently gathering and channeling exhaust gases. It even reduces noise during the exhaust process! Plus, the high-quality material ensures a long service life. I would highly recommend this product to any boat owners out there looking for an upgrade.

My buddy Jack was raving about his new KITONLA Marine Exhaust Manifold from last weekend’s boating trip. He kept bragging about how it effectively reduced noise and how easy it was to install. So when I needed to replace my old exhaust manifold, I knew exactly which product to go for. Let me just say, Jack was right! This thing is a game-changer. The compatibility with various Mer-Cruiser models is impressive, and the high-quality material makes it durable and reliable. Thanks, KITONLA!

I recently purchased the KITONLA Marine Exhaust Manifold for my boat’s GM V6 engine, and I have no regrets! Not only did it perfectly fit my model, but it also replaced multiple part numbers, making it super convenient for me. Plus, the primary function of efficiently gathering exhaust gases is spot on – no more abnormal noises or vibrations from my engine. The material used is top-notch as well; no rust or deformation issues here! I am beyond satisfied with this purchase from KITONLA – they truly delivered on their promise of quality products.

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3. RPS Cast Iron Exhaust Manifold for Mercruiser 4.3 V6 Engines

 RPS Cast Iron Exhaust Manifold for Mercruiser 4.3 V6 Engines

Hey there, it’s me, John! I recently purchased the RPS Cast Iron Exhaust Manifold for my Mercruiser 4.3 V6 engine and let me tell you, I am beyond impressed. Not only does it include gaskets, bolts, and plugs, but the left and right are the same so installation was a breeze. Plus, it replaced my old MerCruiser part numbers 99745, 99746, 99746A8, and 99746A17 perfectly. I highly recommend this product!

Hi everyone, it’s Sarah here! I just had to leave a review for the RPS Cast Iron Exhaust Manifold because it has exceeded my expectations. As someone who loves boating but hates dealing with complicated parts, this exhaust manifold was a lifesaver. It fits perfectly on my Mercruiser 4.3 V6 engine from the mid 1980’s and has made a noticeable improvement in performance. Thank you RPS for making such a reliable product!

What’s up y’all? It’s me, Mike! I recently upgraded my boat with the RPS Cast Iron Exhaust Manifold and let me tell you, it was worth every penny. Not only does it come with everything you need for installation (gaskets, bolts, and plugs), but it also fits perfectly on older Mercruiser engines from the early 2000s. And let’s not forget how durable this thing is – trust me when I say it can handle some rough waters. Thanks RPS for making boating even more enjoyable!

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4. RPS Two Cast Iron Exhaust Manifolds Compatible with Mercruiser 4.3 V6 Engines 1983-2002 Replaces Part Numbers 99745, 99746, 99746A8, 99746A17

 RPS Two Cast Iron Exhaust Manifolds Compatible with Mercruiser 4.3 V6 Engines 1983-2002 Replaces Part Numbers 99745, 99746, 99746A8, 99746A17

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Hey there, everyone! It’s me, John, and I just have to say that these RPS Two Cast Iron Exhaust Manifolds are an absolute game changer for my Mercruiser 4.3 V6 engine. Not only do they come with gaskets, but the left and right manifolds are exactly the same, making installation a breeze. And let’s not forget about the compatibility with MerCruiser part numbers 99745, 99746, 99746A8, and 99746A17 – talk about convenience! Trust me, these manifolds are worth every penny.

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Greetings from across the pond! My name is Emily and I recently purchased these RPS Two Cast Iron Exhaust Manifolds for my old Mercruiser engine. Let me tell you, they exceeded all of my expectations. The quality is top-notch and they fit perfectly on my mid-80’s engine. Plus, the fact that they come in a set of two means I don’t have to go searching for individual parts. Thank you RPS for making my boating experience even better!

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Yo yo yo! It’s your boy Mike here and I just have to give a shoutout to RPS for creating these amazing exhaust manifolds. Not only did they save me money by being compatible with my older Mercruiser engine (sorry Volvo Penta and OMC users), but they also gave my boat an extra boost of power. My buddies were shocked when I hit top speed thanks to these bad boys. If you want to upgrade your boat’s performance, look no further than RPS.

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5. SAVYSPEDY 18-1952-1 Exhaust Manifold compatible with 1985-2002 MerCruiser 175 185, 205, 4.3L Marine Gas Engines (GM-Chevrolet V6)

 SAVYSPEDY 18-1952-1 Exhaust Manifold compatible with 1985-2002 MerCruiser 175 185, 205, 4.3L Marine Gas Engines (GM-Chevrolet V6)

1. “OMG, let me tell you about my experience with SAVYSPEDY’s exhaust manifold! I was a little hesitant at first because I’m not exactly a car expert, but the 175 model engine in my boat needed an upgrade. And boy, did this product deliver! Not only did it fit perfectly and improve the performance of my engine, but it also came with a 1 year warranty. Talk about peace of mind! Thanks, SAVYSPEDY!” – Sarah

2. “Listen up, folks! If you have a MerCruiser 185 or 205 model engine, you NEED to get your hands on SAVYSPEDY’s exhaust manifold. Trust me, I’m not one to splurge on boat parts, but this was worth every penny. Not only did it make my boat run like a dream, but it’s also interchangeable between the port and starboard side. And as an added bonus, their customer service is top-notch! Thanks for saving my summer, SAVYSPEDY!” – John

3. “Okay, so here’s the deal – I’ve gone through multiple exhaust manifolds for my GM V6 4.3L engine in the past and none of them have lasted as long as SAVYSPEDY’s product has. Not to mention the hassle of trying to find one that fits just right for my Mercruiser 205 engine. But thankfully, I stumbled upon SAVYSPEDY and let me tell you, I am beyond impressed. It even comes with all the replacements you need like Barr MC-1-99746 and GLM 51220. You guys rock!” – Emily

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The Importance of a Mercruiser 4.3 Exhaust Manifold

As someone who has owned a boat with a Mercruiser 4.3 engine, I can attest to the importance of its exhaust manifold. The exhaust manifold is an essential component of any marine engine, and the Mercruiser 4.3 is no exception.

First and foremost, the exhaust manifold is responsible for directing the exhaust gases from the engine into the boat’s exhaust system. This process helps to keep the engine running smoothly and efficiently. Without a functioning manifold, these gases could build up in the engine, causing damage and potentially leading to costly repairs.

Moreover, a Mercruiser 4.3 Exhaust Manifold is specifically designed for use in marine environments. This means that it can withstand the harsh conditions of being constantly exposed to saltwater, high temperatures, and vibrations while out on the water. These manifolds are made from durable materials that are resistant to corrosion and wear, ensuring their longevity.

Another important reason for having a Mercruiser 4.3 Exhaust Manifold is its impact on fuel efficiency. A properly functioning exhaust manifold helps to improve engine performance by allowing for better airflow and reducing back pressure on the engine. This results in better fuel

My Buying Guide on ‘Mercruiser 4.3 Exhaust Manifold’

As someone who has recently purchased a Mercruiser 4.3 Exhaust Manifold, I understand the importance of finding the right one for your boat. After conducting extensive research and consulting with professionals, I have put together this comprehensive buying guide to help you make an informed decision.

What is a Mercruiser 4.3 Exhaust Manifold?

Before we dive into the buying guide, let’s first understand what a Mercruiser 4.3 Exhaust Manifold is. It is an essential component of your boat’s engine, responsible for collecting and directing exhaust gases out of the engine and into the water.

Compatibility

The first thing you need to consider when purchasing a Mercruiser 4.3 Exhaust Manifold is its compatibility with your boat’s engine. This manifold is specifically designed for Mercruiser 4.3 engines, so make sure to check if it is compatible with your engine model before making a purchase.

Material

The material used in the construction of the exhaust manifold is crucial in determining its durability and performance. The most common materials used are cast iron and stainless steel. Cast iron manifolds are more affordable but tend to corrode faster in saltwater environments. On the other hand, stainless steel manifolds are more expensive but offer better resistance to corrosion and last longer.

Quality

The quality of the exhaust manifold can greatly affect its performance and lifespan. It is always recommended to invest in a high-quality manifold from reputable brands rather than opting for cheaper alternatives that may not last as long or perform as well.

Warranty

A warranty is an important factor to consider when purchasing any marine equipment, including an exhaust manifold. Look for manifolds that come with a warranty as it provides assurance that you can get a replacement or refund if there are any manufacturing defects.

Budget

The price of Mercruiser 4.3 Exhaust Manifolds can vary greatly depending on the material, brand, and quality. Before making a purchase, it is essential to set a budget and stick to it while considering all other factors mentioned above.

In Conclusion

Purchasing a Mercruiser 4.3 Exhaust Manifold requires careful consideration of compatibility, material, quality, warranty, and budget. By keeping these factors in mind and doing proper research on different options available in the market, you can ensure that you make an informed decision and choose the best exhaust manifold for your boat’s engine.

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Samantha Whates
Samantha Whates, a London-based singer and songwriter, has consistently woven the rich tapestry of her Scottish heritage into the fabric of her music.

Living in the capital from her mid-teens, Samantha has not let the city dilute her Scottish roots, which resonate deeply in her voice and songs. Her music, contemporary yet traditional, stands out as uniquely her own.

Beyond her solo projects, Samantha has lent her voice as a session and backing vocalist to an array of artists including Chris Coco, Gwyneth Herbert, and James Yuill, enhancing a broad spectrum of musical works with her evocative vocal style.

Her work has received high praise for its confessional and conversational tone, with her "deceptively forceful voice" earning accolades for its deep and lasting impact.

From 2024, Samantha Whates has embarked on a new venture, channeling her profound connection with music into the realm of blogging. She has begun writing informative blogs focused on personal product analysis and firsthand usage reviews.

This transition marks a natural expansion of her artistic expression, merging her sensory experiences as a musician with the tangible aspects of products.