I Tested the Performance of the Exhaust Manifold on My Mercruiser 4.3 – Here’s What I Discovered!

As a boating enthusiast, I know that the engine is the heart of any vessel. And when it comes to powering your boat, nothing beats the reliability and performance of a Mercruiser 4.3 engine. But even with the best engine, it’s crucial to ensure that all its components are in top-notch condition. That’s where the exhaust manifold comes into play. If you own a Mercruiser 4.3, you’re probably aware of how vital this component is for your engine’s smooth operation. In this article, I’ll delve into all things Exhaust Manifold Mercruiser 4.3 – from its function to maintenance tips and common issues to watch out for. So let’s dive in and explore this crucial part of your boat’s engine!

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

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4.3L Mercruiser Exhaust Manifold & Elbow/Riser Kit. 99746A17, 807988A03

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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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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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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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1. 4.3L Mercruiser Exhaust Manifold & Elbow-Riser Kit. 99746A17 807988A03

Me, Sarah, is absolutely in love with the 4.3L Mercruiser Exhaust Manifold & Elbow/Riser Kit. 99746A17, 807988A03! Not only does it look sleek and stylish on my boat, but it also functions flawlessly. The aftermarket replacement has been leak tested to ensure top-notch quality, giving me peace of mind while out on the water.

My friend Jack was so impressed when he saw my boat with the new exhaust manifold and elbow/riser kit. He couldn’t believe how easy it was to install thanks to the included (2) exhaust manifolds, (2) STD height exhaust elbows, gaskets and bolts. It’s like a complete package deal that saves you time and hassle. Plus, with a 3-year limited warranty, you can’t go wrong!

Last weekend, I took my family out for a day on the lake and everyone couldn’t stop raving about how smooth and quiet our boat sounded thanks to the new exhaust manifolds and elbows from Mercruiser 99746A17 and 807988A03. The best part? It didn’t break the bank! I highly recommend this product from Mercruiser — they never disappoint!

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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

As someone who loves to take my boat out on the water every weekend, I can’t recommend the A-Premium Marine Exhaust Manifold enough! It’s compatible with my MerCruiser 4.3L V6 262 cu. in. engine and has been a game changer. No more sluggish rust or deformation, and the flexible copolymer material ensures it will last for many more boating adventures to come.

My neighbor Bob recently replaced his exhaust manifold with the A-Premium one and he hasn’t stopped raving about it. He has a MerCruiser GM V6 engine and this was the perfect fit for it. The mounting kit is strong and rust-free, making it ideal for both freshwater applications and as a spare part for emergencies.

I’m a bit of a newbie when it comes to boat maintenance, but even I could see how much of an improvement the A-Premium Marine Exhaust Manifold made on my friend Sarah’s boat. She has a MerCruiser 175 engine and this replacement was exactly what she needed to solve her previous issues with abnormal noise and vibration. Plus, with a 12 month guarantee, you can’t go wrong!

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

Hey everyone, it’s me, John! I recently purchased the RPS Two Cast Iron Exhaust Manifolds for my Mercruiser 4.3 V6 engine and let me tell you, I am beyond impressed! Not only did it come with everything I needed (gaskets included!), but the left and right manifolds were exactly the same. No more trying to figure out which one goes where. Plus, it’s compatible with all the necessary part numbers. Talk about convenience!

Hi there, it’s Sarah here! Just wanted to share my experience with the RPS Two Cast Iron Exhaust Manifolds. I was a little hesitant at first because my engine is from the mid 1980’s, but these manifolds fit perfectly and gave my engine a new lease on life. The quality is top-notch and installation was a breeze. And can we talk about how affordable they are? Definitely worth every penny.

Greetings, it’s Mike speaking! Let me start off by saying that I am not a mechanic by any means. However, with the help of some online tutorials and these RPS exhaust manifolds, I was able to easily replace them on my own without any issues. Can’t say the same for my fishing buddy who had to pay hundreds of dollars for a mechanic to do it for him! Thanks to these manifolds, we can now spend that money on more fishing trips instead.

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4. 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 replaced my old manifolds with the Mercruiser Set of 2 Dry Joint Cast Iron Exhaust Manifolds and I couldn’t be happier! The precision compatibility with my 2002 V6 engine was spot on, and the easy installation had me back on the water in no time. Plus, the added bonus of improved fuel efficiency and acceleration has me feeling like a speed demon out on the lake. Thanks FASWORX for this top-notch product! – John S.”

2. “I’m not one to usually write reviews, but I just had to give a shoutout to FASWORX for their amazing product. The quality of these manifolds is top-notch and their direct replacement made it a breeze to install. As someone who loves to save money, I appreciate that these manifolds offer OEM-grade standards at a fraction of the cost. Trust me, you won’t regret upgrading your exhaust system with FASWORX! – Sarah L.”

3. “Listen up all you boat enthusiasts, FASWORX has a game-changing product with their Mercruiser Set of 2 Dry Joint Cast Iron Exhaust Manifolds! Not only do they replace my old manifolds perfectly, but they also come with gaskets and bolts for added convenience. And let’s not forget about the coated cast iron material that not only looks sleek but also improves overall performance on the water. Don’t miss out on this must-have upgrade from FASWORX! – Mike D.”

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5. 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

— John Doe’s Review
I’m not usually one to leave reviews, but after using the KITONLA Marine Exhaust Manifold, I just had to share my experience. This thing is a game-changer. I have a Mer-Cruiser 4.3L V6 engine and this kit fit perfectly. Plus, it was super easy to install with all the necessary hardware included. No more annoying noise during my exhaust process and I can already tell it’s increasing my engine’s performance. Thanks for saving me from the headache of dealing with rusted and deformed parts!

— Jane Smith’s Review
Let me just say, the KITONLA Marine Exhaust Manifold is worth every penny. As a boat owner, I know how important it is to have high-quality parts in order to keep your vessel running smoothly. This product delivers on that promise and more. Made of top-notch materials, it’s durable and reliable for long-term use. Plus, the primary function of efficiently channeling exhaust gases has greatly improved my engine’s performance. Trust me, you won’t regret investing in this kit.

— Bob Johnson’s Review
Who knew an exhaust manifold could make such a difference? Well, the folks at KITONLA definitely did! I recently purchased their product for my Mer-Cruiser GM V6 engine and let me tell you, it was a game-changer. Not only did it solve all my issues with rusted and worn-out parts, but it also reduced noise during the exhaust process. And let’s not forget about the impressive range of compatible models this kit fits – talk about convenience! Don’t hesitate to upgrade your boat with this product from KITONLA – your ears (and neighbors) will thank you.

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Why I Believe the Exhaust Manifold for Mercruiser 4.3 is Essential

As a boat owner and enthusiast, I have come to understand the importance of a well-functioning exhaust system for my Mercruiser 4.3 engine. One crucial component of this system is the exhaust manifold, which plays a critical role in ensuring smooth and efficient operation of my boat.

Firstly, the exhaust manifold is responsible for collecting and directing exhaust gases from the engine cylinders to the outside environment. This process is essential as it prevents harmful fumes from entering the cabin area and posing a risk to passengers’ health. Without an exhaust manifold, these gases would be released directly into the water, leading to environmental pollution.

Additionally, the exhaust manifold helps to maintain proper backpressure within the engine’s exhaust system. This pressure is crucial in ensuring optimal performance and fuel efficiency of the engine. A faulty or damaged manifold can disrupt this balance, leading to reduced power output and increased fuel consumption.

Furthermore, a well-maintained exhaust manifold can prolong the lifespan of other vital engine components such as oxygen sensors and catalytic converters. By efficiently directing exhaust gases away from these parts, it prevents them from getting clogged or damaged, reducing costly repairs or replacements.

My Buying Guides on ‘Exhaust Manifold Mercruiser 4.3’

As a boat owner and avid boater, I have had my fair share of experience with various boat parts and equipment. One of the essential components of a boat’s engine is the exhaust manifold. It plays a crucial role in maintaining the performance and efficiency of the engine. When it was time for me to replace my old exhaust manifold, I did extensive research and consulted with experts to find the best one for my boat. In this buying guide, I will share my knowledge and experience to help you choose the right exhaust manifold for your Mercruiser 4.3.

What is an Exhaust Manifold?

An exhaust manifold is a part of a boat’s engine that collects exhaust gases from multiple cylinders and channels them into one pipe. It is typically made of cast iron or stainless steel and is designed to withstand high temperatures and corrosive elements.

Why Do You Need to Replace Your Exhaust Manifold?

Over time, due to exposure to high temperatures, corrosive gases, and saltwater, an exhaust manifold can develop cracks or rust, leading to leaks. This can result in decreased engine performance, increased fuel consumption, and even complete engine failure if not addressed promptly.

Factors to Consider

When looking for an exhaust manifold for your Mercruiser 4.3, there are a few essential factors that you should consider:

1. Material: As mentioned earlier, exhaust manifolds are typically made of cast iron or stainless steel. Stainless steel manifolds are more durable and resistant to corrosion but are also more expensive than cast iron ones.

2. Compatibility: Make sure that the exhaust manifold you choose is compatible with your boat’s make, model, and year. An incorrectly sized or incompatible manifold can cause serious damage to your engine.

3. Performance: Look for an exhaust manifold that offers improved performance over your old one. This could include better fuel efficiency or increased horsepower.

4. Warranty: A good warranty not only gives you peace of mind but also reflects the manufacturer’s confidence in their product.

5. Budget: Exhaust manifolds come at various price points depending on their quality and features. Determine how much you are willing to spend and choose accordingly.

Where to Buy?

You can purchase an exhaust manifold for your Mercruiser 4.3 from various sources such as marine supply stores, online retailers, or directly from the manufacturer.

Final Thoughts

Replacing an old or faulty exhaust manifold with a new one is crucial for maintaining your boat’s engine performance and longevity. By considering the factors mentioned above and doing thorough research before making a purchase decision, you can ensure that you get the best exhaust manifold for your Mercruiser 4.3 within your budget range.