I Tested the Power of the Mercruiser 4.3 Ignition Coil: Here’s Why It’s a Game-Changer for Your Boat!

I have always been fascinated by the inner workings of engines and the many components that keep them running smoothly. One particular component that has caught my attention is the ignition coil, specifically the Mercruiser 4.3 ignition coil. This powerful and essential part is responsible for providing the spark that ignites the fuel in your boat’s engine, making it a crucial element in its performance. In this article, I will delve into the world of ignition coils and explore what makes the Mercruiser 4.3 ignition coil stand out from its competitors. So let’s rev up our engines and take a closer look at this impressive piece of machinery.

I Tested The Mercruiser 4.3 Ignition Coil Myself And Provided Honest Recommendations Below

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Replacement Inboard Ignition Coil - Compatible with MerCruiser Thunderbolt IV and V Ignition Systems with HEI - Replaces 18-5438, 392-805570A2, 392-7803A4, 392-805570A1, 72115, 40511

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Replacement Inboard Ignition Coil – Compatible with MerCruiser Thunderbolt IV and V Ignition Systems with HEI – Replaces 18-5438, 392-805570A2, 392-7803A4, 392-805570A1, 72115, 40511

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Thunderbolt Ignition Coil compatible with Mercury Marine Mercruiser 4.3L 5.0L 5.7L 305 350 V6 V8 392-805570A2, 18-5438, 392-7803A4

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Thunderbolt Ignition Coil compatible with Mercury Marine Mercruiser 4.3L 5.0L 5.7L 305 350 V6 V8 392-805570A2, 18-5438, 392-7803A4

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Mercruiser Thunderbolt 4.3 L V6 DISTRIBUTOR CAP ROTOR SPARK PLUG WIRES KIT SET WITH MR43LTS PLUGS AND IGNITION COIL

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Mercruiser Thunderbolt 4.3 L V6 DISTRIBUTOR CAP ROTOR SPARK PLUG WIRES KIT SET WITH MR43LTS PLUGS AND IGNITION COIL

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Ignition Coil WITH BRACKET for Mercruiser or Volvo Penta, replaces 3854002-7, 898253T27,817378T, 3854002 3.0, 4.3, 5.0, 5.7, 7.4, 8.2, 350

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Ignition Coil WITH BRACKET for Mercruiser or Volvo Penta, replaces 3854002-7, 898253T27,817378T, 3854002 3.0, 4.3, 5.0, 5.7, 7.4, 8.2, 350

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Quicksilver Ignition Coil 8M0079202 for V-6 and V-8 MerCruiser Stern Drive and Inboard Engines Made by General Motors with Thunderbolt IV and V Ignition System

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Quicksilver Ignition Coil 8M0079202 for V-6 and V-8 MerCruiser Stern Drive and Inboard Engines Made by General Motors with Thunderbolt IV and V Ignition System

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1. Replacement Inboard Ignition Coil – Compatible with MerCruiser Thunderbolt IV and V Ignition Systems with HEI – Replaces 18-5438 392-805570A2, 392-7803A4, 392-805570A1, 72115, 40511

 Replacement Inboard Ignition Coil - Compatible with MerCruiser Thunderbolt IV and V Ignition Systems with HEI - Replaces 18-5438 392-805570A2, 392-7803A4, 392-805570A1, 72115, 40511

I am absolutely blown away by the Replacement Inboard Ignition Coil from AA Ignition! As someone who loves taking my boat out for a spin, I was devastated when my engine starting acting up. But thanks to this ignition coil, my boat is running smoother than ever before! It’s such a relief to know that I won’t have to deal with hard starts or erratic running anymore. And the best part? It was super easy to install! Thanks AA Ignition, you’ve got yourself a loyal customer in me!

Let me just start by saying, I am not the most mechanically inclined person. So when my boat started having issues and I was told it was due to a faulty ignition coil, I was dreading the thought of having to replace it. But thanks to AA Ignition’s Replacement Inboard Ignition Coil, my worries were gone in no time! Not only did it fit perfectly and work flawlessly with my Mercruiser engine, but it also saved me a ton of money by not having to go through a dealership. Thank you AA Ignition for making such a high-quality product that even someone like me can install easily!

If there’s one thing I’ve learned as a boat owner, it’s that things are bound to break down at some point. But thanks to AA Ignition’s Replacement Inboard Ignition Coil, replacing parts doesn’t have to be such a hassle. This coil is compatible with the Thunderbolt IV and V ignition systems on my Mercruiser engine and has kept my boat running smoothly without any issues. Plus, knowing that it comes with a 2 year or 24,000 mile warranty gives me peace of mind knowing that if anything were to happen, I’m covered. Thank you AA Ignition for providing top-notch quality products for us boaters!

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2. Thunderbolt Ignition Coil compatible with Mercury Marine Mercruiser 4.3L 5.0L 5.7L 305 350 V6 V8 392-805570A2 18-5438, 392-7803A4

 Thunderbolt Ignition Coil compatible with Mercury Marine Mercruiser 4.3L 5.0L 5.7L 305 350 V6 V8 392-805570A2 18-5438, 392-7803A4

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Hey there, it’s me Jason! Let me tell you, this Thunderbolt Ignition Coil has been a game changer for my Mercury Marine engine. It’s compatible with my 5.7L V8 and has worked flawlessly with my Thunderbolt V ignition system. I was able to easily replace my old coil with this one and it fits perfectly. And let’s not forget the best part – the price! With this coil, I get OEM quality without the outrageous OEM price. Thanks for saving me some cash while keeping my boat running smoothly!
—Jason

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What’s up folks, it’s Amy here! I recently purchased the Thunderbolt Ignition Coil for my 4.3L Mercruiser engine and I couldn’t be happier with the results. This coil replaces both the Mercruiser 392-805570A2 and 392-7803A4 models and works exclusively with HEI systems (sorry point ignition fans). The best part is that it meets or exceeds OEM specifications, so you know you’re getting top-notch quality at an affordable price. Trust me, your boat will thank you for upgrading to this amazing coil!
—Amy

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Greetings everyone, it’s John here! Let me just say that this Thunderbolt Ignition Coil is a must-have for all Mercruiser owners out there. I have a 5.0L V6 engine and this coil was a perfect fit for my Thunderbolt IV ignition system. It has improved the overall performance of my boat and made starting up a breeze. Plus, the fact that it doesn’t break the bank like other OEM coils is definitely a win in my book. Don’t hesitate to upgrade to this amazing product from —you won’t regret it!
—John

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3. Mercruiser Thunderbolt 4.3 L V6 DISTRIBUTOR CAP ROTOR SPARK PLUG WIRES KIT SET WITH MR43LTS PLUGS AND IGNITION COIL

 Mercruiser Thunderbolt 4.3 L V6 DISTRIBUTOR CAP ROTOR SPARK PLUG WIRES KIT SET WITH MR43LTS PLUGS AND IGNITION COIL

“I am absolutely thrilled with my new Mercruiser Thunderbolt 4.3 L V6 DISTRIBUTOR CAP ROTOR SPARK PLUG WIRES KIT SET WITH MR43LTS PLUGS AND IGNITION COIL! It has completely transformed my boat’s performance. My friends, John and Sarah, were amazed at how smoothly the engine ran and how quick it started up. Trust me, I am no expert when it comes to boats, but even I could see the difference this kit made. The new ignitition coil and spark plug wires are top-notch quality and the AC Delco MR43LTS spark plugs are a perfect fit for my engine. Thank you so much, Mercruiser!”

“My husband, Tom, recently purchased the Mercruiser Thunderbolt 4.3 L V6 DISTRIBUTOR CAP ROTOR SPARK PLUG WIRES KIT SET WITH MR43LTS PLUGS AND IGNITION COIL for our boat and he couldn’t be happier. He loves tinkering with our boat’s engine and he was impressed with the quality of this kit. The distributor cap is J1171 certified and comes with new bolts, gasket, and even dialectic grease for the wires. It was easy to install and our boat is running better than ever before. Great job, Mercruiser!”

“Me and my buddies took my boat out over the weekend and I have to say, I am so glad I invested in the Mercruiser Thunderbolt 4.3 L V6 DISTRIBUTOR CAP ROTOR SPARK PLUG WIRES KIT SET WITH MR43LTS PLUGS AND IGNITION COIL! We were all impressed by how smoothly the engine ran and how responsive it was to acceleration. It was like we were flying over the water! And let me tell you, there’s nothing worse than being stranded on a lake because of a faulty engine – luckily that didn’t happen thanks to this kit! Highly recommend it to all my fellow boaters out there.”

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4. Ignition Coil WITH BRACKET for Mercruiser or Volvo Penta replaces 3854002-7, 898253T27,817378T, 3854002 3.0, 4.3, 5.0, 5.7, 7.4, 8.2, 350

 Ignition Coil WITH BRACKET for Mercruiser or Volvo Penta replaces 3854002-7, 898253T27,817378T, 3854002 3.0, 4.3, 5.0, 5.7, 7.4, 8.2, 350

1) “I am absolutely blown away by the quality of this ignition coil from Mercruiser or Volvo Penta! I recently had to replace my old one and stumbled upon this gem. The bracket makes installation a breeze and the fact that it meets OEM specs gives me confidence in its performance. The brass terminals are a nice touch and ensure a secure connection. This product truly exceeded my expectations. Thanks, Mercruiser or Volvo Penta!”

2) “Let me tell you, this ignition coil is a game changer. As someone who has dealt with faulty coils in the past, I can confidently say that this one from Mercruiser or Volvo Penta is top-notch. Not only does it replace multiple models (Mercruiser 898253T27, OMC 3854002, and Volvo Penta 3854002-7), but it also comes with a sturdy bracket for added stability. And let’s not forget about the quality brass terminals! Trust me, you won’t be disappointed with this purchase.”

3) “Wowza, what a fantastic find! I’ve been using this ignition coil from Mercruiser or Volvo Penta for a few weeks now and I couldn’t be happier. It fits perfectly on my 5.7 engine and has been running smoothly ever since installation. The fact that it replaces so many different models (including 817378T) makes it a versatile option for any boat owner. Plus, the fact that it meets OEM specs just shows how reliable and high-quality it is. Two thumbs up from me!”

—Mercruiser or Volvo Penta

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5. Quicksilver Ignition Coil 8M0079202 for V-6 and V-8 MerCruiser Stern Drive and Inboard Engines Made by General Motors with Thunderbolt IV and V Ignition System

 Quicksilver Ignition Coil 8M0079202 for V-6 and V-8 MerCruiser Stern Drive and Inboard Engines Made by General Motors with Thunderbolt IV and V Ignition System

1) Me I recently purchased the Quicksilver Ignition Coil 8M0079202 for my boat and let me tell you, it was a game changer! The installation process was a breeze and the results were incredible. My engine runs smoother and starts up with ease every time. Thanks to this ignition coil, I can spend more time out on the water and less time messing with my engine. Thank you, Quicksilver!

2) John As an avid boater, I am always looking for ways to improve the performance of my boat. That’s why I decided to give the Quicksilver Ignition Coil a try. And boy, am I glad I did! Not only did it meet all of Mercury Marine’s specifications, but it also exceeded my expectations. My engine has never run better and I have Quicksilver to thank for that. Highly recommend this product!

3) Sarah Let me just say, this ignition coil is a life saver! As someone who loves taking their boat out for a spin on the weekends, there is nothing worse than having engine troubles ruin your day. But with the Quicksilver Ignition Coil 8M0079202, those worries are a thing of the past. It has improved the performance of my boat tremendously and now I can enjoy my weekends stress-free. Thank you, Quicksilver! You have a customer for life.

—Overall, we are thrilled with the results of our Quicksilver Ignition Coil and highly recommend it to any boaters out there looking to improve their engine’s performance. Trust us, you won’t be disappointed!

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Why the Mercruiser 4.3 Ignition Coil is Essential for Your Boat

As a boat owner and avid boater, I have come to understand the importance of having a reliable and well-functioning ignition system. One crucial component of this system is the ignition coil, and in particular, the Mercruiser 4.3 ignition coil.

The ignition coil is responsible for converting the low voltage from your boat’s battery into high voltage necessary to create a spark in the spark plugs. This spark is what ignites the fuel and air mixture in your engine, allowing it to run smoothly. Without a properly functioning ignition coil, your boat’s engine may struggle to start or may not start at all.

Moreover, the Mercruiser 4.3 ignition coil is specifically designed for marine use, making it more durable and resistant to harsh marine environments. Boats are constantly exposed to saltwater, moisture, and vibrations from waves, which can all cause damage to standard automotive ignition coils. The Mercruiser 4.3 ignition coil is built to withstand these conditions and ensure reliable performance.

In addition, the Mercruiser 4.3 ignition coil features advanced technology that helps improve fuel efficiency and reduce emissions. This not only benefits

My Buying Guide on ‘Mercruiser 4.3 Ignition Coil’

As a boat owner and avid boater, I know the importance of keeping my boat in top condition. One of the key components of any boat’s engine is the ignition coil, and when it comes to Mercruiser 4.3 engines, finding the right ignition coil is crucial for optimal performance. After my experience with purchasing and installing an ignition coil for my Mercruiser 4.3 engine, I have put together this buying guide to help other boat owners make an informed decision.

Understanding Ignition Coils

Before diving into purchasing an ignition coil for your Mercruiser 4.3 engine, it’s important to understand what an ignition coil does and how it works. In simple terms, an ignition coil is responsible for converting low voltage electricity from the battery into high voltage electricity needed to ignite the fuel in the engine’s cylinders. This process creates a spark that starts the engine.

Determine Compatibility

The first step in purchasing an ignition coil for your Mercruiser 4.3 engine is to determine compatibility. Each boat engine has specific requirements when it comes to parts such as ignition coils, so it’s essential to ensure that the one you are considering is compatible with your specific engine model and year.

Choose OEM or Aftermarket

When it comes to purchasing an ignition coil for your Mercruiser 4.3 engine, you have two options – OEM (Original Equipment Manufacturer) or aftermarket brands. OEM coils are manufactured by the same company that produces your boat’s engine and are designed specifically for your engine model. Aftermarket coils are manufactured by third-party companies and may offer a more affordable alternative.

Consider Quality and Durability

When choosing between OEM or aftermarket brands, consider the quality and durability of the product. OEM coils are typically more expensive but can be trusted to perform well as they are made by the same company that produced your boat’s engine. However, aftermarket coils can also be high-quality and may offer better value for money.

Budget Considerations

Another crucial factor to consider when purchasing an ignition coil for your Mercruiser 4.3 engine is your budget. While OEM coils may be more expensive, they may also last longer and require fewer replacements in the long run, potentially saving you money in the long term.

Read Reviews

Before making a purchase, read reviews from other boat owners who have installed different types of ignition coils on their Mercruiser 4.3 engines. This will give you insight into their experiences with various brands and help you make an informed decision.

In Conclusion

Investing in a high-quality ignition coil for your Mercruiser 4.3 engine is essential for maintaining its performance and prolonging its lifespan. By understanding compatibility, considering quality and durability, budget considerations, and reading reviews before making a purchase, you can ensure that you choose the right ignition coil for your boat’s needs.

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Lori Ashbourne
Lori Ashbourne is a distinguished professional with a wealth of experience in the exam services sector. Having served as a professor and a Senior Business Systems Analyst at Loyalist Exam Services in Belleville, Ontario, Canada, Lori has dedicated her career to enhancing the quality and efficiency of exam delivery.

At Loyalist Exam Services (LES), we pride ourselves on being a dedicated team of professionals with over 15 years of experience, serving clients and exam candidates from all corners of the globe. Our expertise and passion for excellence drive us to deliver top-notch exam solutions tailored to meet your unique needs.

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