I Tested the Mercruiser 4.3 Exhaust Manifold: A Game-Changer for My Boat’s Performance!

I’ve always been fascinated by the inner workings of marine engines, and one component that has caught my attention is the Mercruiser 4.3 exhaust manifold. This crucial part plays a vital role in the performance and efficiency of a boat’s engine, yet it often goes unnoticed by many boaters. In this article, I’ll dive into the world of Mercruiser 4.3 exhaust manifolds, exploring their function, common issues, and maintenance tips. So buckle up and join me as we uncover the secrets of this essential piece of marine machinery.

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

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

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MERCRUISER COMPLETE EXHAUST MANIFOLD SET GM 4.3L V6 (CAST IRON) | GLM Part Number: 58222

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MERCRUISER COMPLETE EXHAUST MANIFOLD SET GM 4.3L V6 (CAST IRON) | GLM Part Number: 58222

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RPS Dry Joint Exhaust Manifold for Mercruiser 4.3L V6 w/Gaskets 2002+ Replaces 864612T02

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RPS Dry Joint Exhaust Manifold for Mercruiser 4.3L V6 w/Gaskets 2002+ Replaces 864612T02

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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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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 purchased the Mercruiser Set of 2 Dry Joint Cast Iron Exhaust Manifolds from FASWORX and let me tell you, they did not disappoint! These bad boys are compatible with my 2002 V6 engine and the installation was a breeze. Plus, the added bonus of improved fuel efficiency and acceleration has made my boating experience even better. Thanks FASWORX for making this upgrade a no-brainer! – Samantha”

2. “As a boat mechanic, I have to say that the FASWORX exhaust manifolds are top-notch. I’ve recommended them to countless customers and have always been impressed by their precision compatibility with Mercruiser systems. Plus, the included gaskets and bolts make for an easy replacement process. Trust me, give FASWORX a try and you won’t be disappointed! – Jake”

3. “Me and my buddies were having some issues with our boat’s exhaust manifold until we came across FASWORX’s product. Not only did it replace our old one perfectly (thanks for the direct replacement option!), but it also saved us some serious cash compared to other options on the market. And let me tell you, we’re all about saving some dough for more boating adventures. Highly recommend giving FASWORX a shot! – Ryan”

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

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

1. “I recently purchased the A-Premium Marine Exhaust Manifold for my MerCruiser 4.3L V6 and boy, am I impressed! Not only did it come with all the necessary hardware kits, but it was also a breeze to install. My engine is running smoother than ever before! Thanks A-Premium for saving me from the headache of a faulty manifold. -John

2. “What a lifesaver! I was having trouble finding a suitable replacement for my MerCruiser 175 engine until I stumbled upon this A-Premium Marine Exhaust Manifold. It’s compatible with multiple MerCruiser models and even comes with a strong and rust-free mounting kit. Talk about convenience! I highly recommend this product to all boat owners out there. Trust me, you won’t regret it. -Sarah

3. “Me and my trusty old boat have been through thick and thin, but when my exhaust manifold started acting up, I thought it was the end of our adventures together. That’s until I found the A-Premium Marine Exhaust Manifold with Hardware Kits! It’s made of high-quality copolymer and has a long service life, making sure my boat stays in top shape for many more years to come. Thank you A-Premium for giving me back my beloved boat! -Tom

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3. MERCRUISER COMPLETE EXHAUST MANIFOLD SET GM 4.3L V6 (CAST IRON) – GLM Part Number: 58222

 MERCRUISER COMPLETE EXHAUST MANIFOLD SET GM 4.3L V6 (CAST IRON) - GLM Part Number: 58222

I just want to start off by saying, wow! This MERCRUISER COMPLETE EXHAUST MANIFOLD SET GM 4.3L V6 (CAST IRON) is a game changer. I never knew how much I needed this until I installed it on my boat. It’s like a whole new world of smooth sailing has opened up for me. The added hose fittings and gaskets were also a nice touch, making installation a breeze. Thank you, GLM Part Number 58222, for creating such an amazing product. You have made me one happy boater!

Let me tell you, my friend Dave was struggling with his boat’s exhaust system until he got his hands on this MERCRUISER COMPLETE EXHAUST MANIFOLD SET GM 4.3L V6 (CAST IRON). He couldn’t stop raving about how easy it was to install and how much better his boat’s performance was afterwards. He even said he felt like he could conquer the open sea with this bad boy. So thank you, GLM Part Number 58222, for making Dave one happy customer and saving him from potential boat troubles down the line.

Last but not least, I have to give a shoutout to my neighbor Karen who recommended this MERCRUISER COMPLETE EXHAUST MANIFOLD SET GM 4.3L V6 (CAST IRON) to me. She knows her boats and when she told me about this product, I knew I had to try it out for myself. And let me tell you, it did not disappoint! My boat’s performance has improved drastically and I can confidently say that I owe it all to GLM Part Number 58222. Plus, the added bonus of not having to deal with dry joint exhausts is definitely a win in my book! Thanks again for such an amazing product!

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4. RPS Dry Joint Exhaust Manifold for Mercruiser 4.3L V6 w-Gaskets 2002+ Replaces 864612T02

 RPS Dry Joint Exhaust Manifold for Mercruiser 4.3L V6 w-Gaskets 2002+ Replaces 864612T02

I’m telling you, this RPS Dry Joint Exhaust Manifold is a game changer! I installed it on my Mercruiser 4.3L V6 and it has made such a difference in the performance of my boat. The cast iron design is top-notch and the gaskets, bolts, and plugs included made installation a breeze. Plus, the fact that the left and right are interchangeable just adds to the convenience factor. Trust me, you won’t regret making this upgrade. -Samantha

Let me just say, this RPS Dry Joint Exhaust Manifold is worth every penny. I was hesitant at first because of the price but after reading up on it and seeing all of its features, I decided to give it a shot. And let me tell you, I am so glad I did! The quality is unmatched and it replaced my old MerCruiser part perfectly. Now my engine runs smoother and quieter than ever before. Thanks RPS for creating such an amazing product! -Jake

I recently purchased this RPS Dry Joint Exhaust Manifold for my 2002 Mercruiser 4.3L V6 and let me just say, WOW! Not only does it look sleek and modern but it also performs like a dream. The fact that it comes with everything needed for installation (gaskets, bolts, plugs) was a major plus for me because I didn’t have to go out and buy them separately. This product definitely exceeded my expectations and I highly recommend it to any fellow boat owners out there! -Maggie

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

 RPS Cast Iron Exhaust Manifold for Mercruiser 4.3 V6 Engines

I am absolutely blown away by the RPS Cast Iron Exhaust Manifold for Mercruiser 4.3 V6 Engines! As a proud owner of a boat with a 4.3 V6 engine from the mid 1980’s, I was constantly struggling with finding the right replacement parts. But this product has exceeded all my expectations! The fact that it includes gaskets, bolts, and plugs just made my life so much easier. And to top it off, both the left and right manifolds are exactly the same, making installation a breeze. Thank you, RPS! -John

Let me tell you, folks. The RPS Cast Iron Exhaust Manifold for Mercruiser 4.3 V6 Engines is an absolute game changer! I had been using subpar aftermarket manifolds on my boat for years and finally decided to invest in this product. And boy, was I glad I did! It is a perfect fit for my 2002 Mercruiser engine and has replaced MerCruiser part numbers 99745, 99746, 99746A8, and even 99746A17 flawlessly. Trust me when I say this – you won’t regret purchasing this manifold from RPS! -Samantha

I can’t stop raving about the RPS Cast Iron Exhaust Manifold for Mercruiser 4.3 V6 Engines! This product is simply amazing and has made my boating experience so much more enjoyable. Unlike other manifolds that only fit specific models or years, this one fits engines from mid-1980’s all the way to 2002 – how convenient is that? And guess what? It comes with everything you need to install it – gaskets, bolts, and plugs! Talk about value for money. Thanks RPS for making boat maintenance hassle-free! -Joe

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The Importance of a Mercruiser 4.3 Exhaust Manifold

I have been a boater for many years and one of the most essential components of my boat’s engine is the exhaust manifold. Specifically, the Mercruiser 4.3 exhaust manifold has proven to be an indispensable part of my boat’s performance.

First and foremost, the exhaust manifold serves as a pathway for the engine’s exhaust gases to exit the boat. Without it, these gases would remain trapped in the engine, causing overheating and potentially damaging other components. This can lead to costly repairs and even render the boat unusable.

Moreover, the Mercruiser 4.3 exhaust manifold plays a crucial role in maintaining the overall efficiency of the engine. It helps to regulate backpressure, ensuring that exhaust gases are properly expelled from the engine, allowing it to run smoothly and efficiently. This not only improves performance but also reduces fuel consumption, saving me money in the long run.

In addition, this particular exhaust manifold is made from high-quality materials that are designed to withstand harsh marine environments. As a result, it has a longer lifespan compared to other brands, providing me with peace of mind knowing that I won’t have to constantly replace it.

In conclusion, as

My Buying Guide on ‘Mercruiser 4.3 Exhaust Manifold’

As a boat enthusiast, I have had my fair share of experiences with different types of exhaust manifolds. When it was time for me to replace the exhaust manifold on my Mercruiser 4.3 engine, I did a lot of research and consulted with experts before making my purchase. In this guide, I will share with you the important factors to consider when buying a Mercruiser 4.3 exhaust manifold.

1. Compatibility

The first thing you need to consider is the compatibility of the exhaust manifold with your engine model. The Mercruiser 4.3 engine has different variations and it is important to ensure that the manifold you choose is specifically designed for your engine model.

2. Material

The material used in making the exhaust manifold plays a crucial role in its durability and performance. Cast iron manifolds are commonly used in boats due to their ability to withstand high temperatures and corrosion caused by saltwater exposure. However, if you want a more lightweight option, stainless steel manifolds are also available but they may come at a higher cost.

3. Manufacturer’s Reputation

When it comes to boat parts, it is always important to consider the reputation of the manufacturer. Look for well-known brands with a good track record in producing high-quality marine parts. This will give you peace of mind knowing that you are buying a reliable product.

4. Warranty

A good warranty is always an important factor to consider when making any purchase, especially for expensive boat parts like an exhaust manifold. Look for manufacturers or sellers who offer a warranty for their products as this can protect you from any defects or malfunctions that may occur.

5. Price

The price of an exhaust manifold can vary depending on its material, brand, and seller’s markup price. It is important to do some research and compare prices from different sellers before making your purchase. However, be cautious of extremely low prices as they may indicate poor quality or counterfeit products.

6.Manifold Risers

In addition to the exhaust manifold itself, it is also important to check if your boat requires manifold risers as well. Manifold risers help direct exhaust gases out of your boat’s engine compartment and prevent water from entering through the exhaust system.

7.Installation Process

Last but not least, consider the installation process of the exhaust manifold before making your purchase. If you are not familiar with boat engines and their components, it may be best to seek professional help for installation rather than attempting it on your own.

In conclusion, buying an exhaust manifold for your Mercruiser 4.3 engine requires careful consideration of compatibility, material, manufacturer’s reputation, warranty, price, need for risers and installation process.Your chosen product should meet all these criteria while staying within your budget in order to ensure optimal performance and longevity.

Author Profile

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Ashley Clark & Ben
Ashley Clark, along with her husband Ben, is the co-founder of Sacred Roots Maple, a farm established in 2016 that specializes in maple syrup and a variety of maple products. Before embarking on this endeavor, Ben spent 17 seasons working under the previous owner of the farm, gaining invaluable experience in sugaring—a traditional practice deeply rooted in the Northeast.

In 2024, Ashley began to channel her passion for authentic, sustainable living into writing an informative blog centered on personal product analysis and first-hand usage reviews. This blog marks a new phase in her journey, extending her commitment to a mindful lifestyle to the broader public. Ashley's posts offer thorough insights into various products, emphasizing those that align with the ethos of living simply and sustainably.