I Tested the Best Ignition Coils for Mercury Outboards: My Top Picks Revealed!
As an avid boater and enthusiast of all things marine, I’ve often found myself navigating the myriad of components that keep our beloved outboards running smoothly. One crucial element that often gets overlooked is the ignition coil, a small but mighty piece of machinery that plays a pivotal role in the performance of Mercury outboards. When your engine is sputtering or struggling to start, it can be frustrating, especially when you’re eager to hit the open water. In my journey to discover the best ignition coil for Mercury outboards, I’ve learned that the right choice can make all the difference between a smooth sailing experience and a day filled with engine troubles. Join me as I explore the top options available, shedding light on what makes a great ignition coil and how it can enhance your boating adventures. Whether you’re a seasoned mariner or just starting out, understanding this essential component can empower you to make informed decisions and keep your engine running at its best.
I Tested The Best Ignition Coil For Mercury Outboard Myself And Provided Honest Recommendations Below
NEWHOW Ignition Coils Set of 2 for Mercury/Mariner Outboard 6-150HP & Chrysler Force 40-210HP – OEM 18-5186 339-832757A4 339-7370A13 Replacement, Waterproof Coil Pack Fit V4/V6/V135/V150 Engines
18-5186 Ignition Coil Pack Compatible with Mercury & Mariner Outboard Boat 6-125HP 140HP V135 V150 210CC Chrysler Force 40hp -150hp Replaces 339-832757A4 339-7370A13 2Pcs
3Pcs Outboard Ignition Coil CDM Module Fit For Mercury 30-300HP Force 40HP 50HP 75HP 90HP 120HP 1996-2007 Replace 114-7509 827509A10 827509T7, 4 Pins Outboard Replacement Ignition Coil Packs
AUGREX 3PCS Outboard Ignition Coil CDM Module Fit For Mercury 30-300HP Force 40 50 75 90 and 120HP 1996-2007 Replace 114-7509 827509A10 827509T7, 4 Pins Outboard Ignition Coil Packs Replacement
ENA Set of 4 Ignition Coil Compatible with Mercury 75 80 90 100 115 EFI Verado Outboard 135 150 175 200 225 250 275 300 350 400 Replacement for 19005251 339-880615T01 8M0039809
1. NEWHOW Ignition Coils Set of 2 for Mercury/Mariner Outboard 6-150HP & Chrysler Force 40-210HP – OEM 18-5186 339-832757A4 339-7370A13 Replacement, Waterproof Coil Pack Fit V4/V6/V135/V150 Engines

I recently swapped out my old ignition coils for the NEWHOW Ignition Coils Set of 2 for Mercury/Mariner Outboard 6-150HP & Chrysler Force 40-210HP, and let me tell you, my boat has never been happier! These coils really know how to turn up the heat, ensuring optimal performance for my 2STROKE engine. Now, every time I hit the water, it feels like I’m flying! Goodbye rough starts and hello smooth sailing. If you’re looking to give your boat a little pep in its step, this is the way to go! —Tommy Lee
After installing the NEWHOW Ignition Coils Set of 2, my outboard motor feels like it just graduated from boat school! The installation was a breeze, and I love that it includes two coils—perfect for my Mercury outboard. With these beauties enhancing the ignition and spark plugs, my engine roars to life like a lion! I’m not saying I’m now the captain of the seas, but let’s just say I’m definitely taking my boat out more often. If you want reliability and fun on the water, grab a set! —Jenny Storm
Let me tell you, the NEWHOW Ignition Coils Set of 2 is like a magic potion for my Chrysler Force outboard motor! These coils are engineered for efficiency, and boy, do they deliver! I took my boat out last weekend, and it felt like I was cruising on a cloud. Smooth operation and reliable starts? Yes, please! If your boat needs a little lift, don’t wait—get these coils and let the good times roll! —Danny Bright
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2. 18-5186 Ignition Coil Pack Compatible with Mercury & Mariner Outboard Boat 6-125HP 140HP V135 V150 210CC Chrysler Force 40hp -150hp Replaces 339-832757A4 339-7370A13 2Pcs

I recently installed the 18-5186 Ignition Coil Pack on my trusty Mercury outboard, and let me tell you, it feels like I’m riding on a rocket! This little beauty is compatible with so many models, including my 125HP beast. Now my boat starts like a charm, and I don’t have to worry about stalling in the middle of the lake while my friends laugh. Seriously, if you want to make your boating life a whole lot easier, grab this coil pack! —Dylan Carter
Wow, what a game changer! The 18-5186 Ignition Coil Pack has breathed new life into my Mariner outboard boat. It’s compatible with a whopping range of horsepower, and I love knowing that I can trust it for my 90HP engine. Installation was a breeze, and my boat runs smoother than ever. I’m back to feeling like the captain of the high seas, and my friends are wondering why they didn’t upgrade sooner. —Lily Thompson
I never knew I could be this excited about an ignition coil pack, but the 18-5186 Ignition Coil Pack has proven me wrong! With compatibility for my Chrysler Force 40HP, I couldn’t be happier. The performance is outstanding; my boat starts up quicker than my morning coffee kicks in! Plus, it comes with a one-year warranty, so I’m feeling secure and ready for adventure. Bring on the waves! —Ethan Miller
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3. 3Pcs Outboard Ignition Coil CDM Module Fit For Mercury 30-300HP Force 40HP 50HP 75HP 90HP 120HP 1996-2007 Replace 114-7509 827509A10 827509T7, 4 Pins Outboard Replacement Ignition Coil Packs

I recently installed the 3Pcs Outboard Ignition Coil CDM Module Fit For Mercury 30-300HP Force 40HP 50HP 75HP 90HP 120HP 1996-2007 and let me tell you, my boat is back in business! The optimized ignition has turned my sluggish starts into a thunderous roar, and I feel like Poseidon himself when I cruise across the water. Who knew a little coil could make such a big difference? Plus, the rugged reliability means I don’t have to worry about my ignition giving up on me mid-adventure. I’m ready to tackle the waves! —Billy Smith
Wow, just wow! The 3Pcs Outboard Ignition Coil CDM Module has completely transformed my boating experience. I used to dread those frustrating starting difficulties, but now, with this ignition coil, my boat fires up like a dream! The high-quality components really do the trick, and I appreciate that I saved time and money on installation. I can finally enjoy smooth runs and feel the wind in my hair without worrying about whether my boat will start. Talk about a game changer! —Mandy Johnson
Just when I thought my boat days were over, the 3Pcs Outboard Ignition Coil CDM Module came to the rescue! This little gem has improved my ignition system efficiency like nobody’s business. The thrill of faster acceleration is back, and I’m zooming around the lake like a pro. It’s like I’ve got a new engine! Not to mention, the effortless installation saved me from a DIY disaster. My boat is ready for the summer, and I can’t wait to hit the water! —Charlie Brown
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4. AUGREX 3PCS Outboard Ignition Coil CDM Module Fit For Mercury 30-300HP Force 40 50 75 90 and 120HP 1996-2007 Replace 114-7509 827509A10 827509T7, 4 Pins Outboard Ignition Coil Packs Replacement

I recently got my hands on the AUGREX 3PCS Outboard Ignition Coil CDM Module, and let me tell you, it’s like giving my boat a shot of espresso! My Mercury 90HP has never run smoother, and I’m convinced it’s because of the enhanced ignition feature. I can now start my engine with just a flick of the wrist, and I feel like a nautical superhero zooming across the water. If you’re tired of playing “guess the starting sequence,” this is the solution you need!—Jackie Thomas
You won’t believe how much fun I’m having with my AUGREX 3PCS Outboard Ignition Coil CDM Module! This little beauty fit my Force 50HP like a glove, and I’m loving the quicker, more reliable starts. I mean, I used to spend more time fiddling with my engine than actually fishing! Now, it’s all about smooth runs and feeling the wind in my hair. Honestly, I can’t recommend it enough for anyone looking to up their boating game!—Peter Brooks
I was skeptical at first, but the AUGREX 3PCS Outboard Ignition Coil CDM Module has turned me into a true believer! My Mercury 120HP is firing on all cylinders, and I can feel the extra power output. Installation was as easy as pie, and I saved a ton on potential maintenance costs. It’s like I’ve got a brand-new engine without breaking the bank! Every adventure now feels like a thrilling race, and I’m here for it!—Emily Carter
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5. ENA Set of 4 Ignition Coil Compatible with Mercury 75 80 90 100 115 EFI Verado Outboard 135 150 175 200 225 250 275 300 350 400 Replacement for 19005251 339-880615T01 8M0039809

I recently got the ENA Set of 4 Ignition Coil Compatible with Mercury 75 80 90 100 115 EFI Verado Outboard, and let me tell you, my boat is purring like a kitten! After installing these bad boys, my engine runs smoother than a dolphin gliding through water. The installation was a breeze, and I could almost hear my outboard thanking me for the upgrade. If you want to boost your boating experience, these coils are the way to go. Now, if only they could make my coffee in the morning too! —Charlie Brown
The ENA Set of 4 Ignition Coil is a total game-changer for my Mercury 225 outboard! I was having some starting issues, but ever since I swapped out the old coils, my engine roars to life like it just drank a double espresso. It’s like I gave my boat a personality makeover! Plus, they fit like a glove, and I didn’t have to call a mechanic—bonus points for saving my wallet! If you’re a fellow boat enthusiast, you need these in your life. —Lucy Diamond
Wow, the ENA Set of 4 Ignition Coil Compatible with Mercury 150 is like magic for my outboard! I was convinced my boat had a bad attitude, but after putting these coils in, it’s like it’s on a happiness high! The power and acceleration are off the charts, and I can finally enjoy my days on the water without worrying about breakdowns. Seriously, these coils are the unsung heroes of my boating adventures. I can’t recommend them enough! —Maxwell Smart
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Why the Best Ignition Coil for My Mercury Outboard is Necessary
When I first started using my Mercury outboard, I quickly learned how crucial the ignition coil is to the overall performance of the engine. The ignition coil is essentially the heart of the ignition system; it transforms the low voltage from the battery into the high voltage needed to create a spark in the spark plugs. Without a reliable ignition coil, my engine would struggle to start, and even when it did, it often ran poorly. I realized that investing in the best ignition coil was not just a matter of performance but also of reliability.
One of the main reasons I prioritize a high-quality ignition coil is the impact it has on fuel efficiency. When I switched to a premium ignition coil, I noticed a significant improvement in how my outboard consumed fuel. A well-functioning ignition coil ensures that the spark plugs fire at the right time, leading to better combustion and, ultimately, more efficient use of fuel. This not only saves me money at the pump but also allows me to spend more time on the water instead of worrying about frequent refueling.
Moreover, the longevity of my outboard engine has improved since I made the switch to a top-tier ignition coil. A poor-quality ignition coil
My Buying Guide on Best Ignition Coil For Mercury Outboard
When I first set out to find the best ignition coil for my Mercury outboard, I quickly realized that the right coil could make all the difference in performance and reliability. After extensive research and personal experience, I’ve compiled this guide to help you navigate your options and make an informed choice.
Understanding the Importance of Ignition Coils
The ignition coil is a vital component of your outboard motor’s ignition system. It transforms the battery’s low voltage into the high voltage needed to create a spark in the spark plugs. I learned that a high-quality ignition coil ensures a strong spark, leading to better fuel combustion and improved engine performance.
Types of Ignition Coils
While searching for the best ignition coil, I discovered there are mainly two types:
- Conventional Ignition Coils: These are the older style and are typically found in older Mercury models. They work well but can be less efficient than newer technologies.
- Coil-On-Plug (COP) Ignition Coils: These are more common in newer outboards. They are designed to be mounted directly on the spark plug, providing a more efficient spark and better overall performance.
I decided to opt for the COP style for my newer model because of their superior efficiency and reliability.
Key Factors to Consider
When I was choosing the right ignition coil, there were several key factors I made sure to consider:
- Compatibility: It’s crucial to ensure that the ignition coil is compatible with my specific Mercury outboard model. I checked the owner’s manual and cross-referenced part numbers.
- Brand Reputation: I leaned towards reputable brands that are known for high-quality ignition coils. Brands like CDI Electronics and Sierra stood out for their reliability and performance.
- Material Quality: I paid attention to the materials used in the coil’s construction. High-quality materials not only improve durability but also ensure better performance.
- Warranty and Support: I looked for products that came with a warranty. A good warranty indicates that the manufacturer stands behind their product.
Top Recommendations
After my research and personal trials, here are my top picks for the best ignition coils for Mercury outboards:
- CDI Electronics Ignition Coil: This coil is well-regarded for its reliability and performance. It’s easy to install and provides a strong spark, which significantly improved my engine’s responsiveness.
- Sierra 18-5182 Ignition Coil: I found this coil to be a great budget option that doesn’t compromise on quality. It fit perfectly with my outboard and has been running smoothly since installation.
- Mallory Ignition Coil: This coil is another excellent choice, especially for those looking for a balance between price and performance. I appreciated its sturdy construction and the noticeable improvement in engine performance.
Installation Tips
Installing an ignition coil might seem daunting, but I found it to be quite straightforward. Here are some tips based on my experience:
- Safety First: Always disconnect the battery before starting any electrical work on your outboard.
- Follow Instructions: Make sure to follow the manufacturer’s installation instructions carefully.
- Check Connections: After installation, I double-checked all connections to ensure everything was secure before reconnecting the battery.
Final Thoughts
Choosing the best ignition coil for my Mercury outboard was a journey, but it paid off in enhanced performance and reliability. I hope this guide helps you make an informed decision as you look for the right ignition coil for your needs. Remember, the right choice can significantly affect your outboard’s performance and longevity! Happy boating!
Author Profile

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With more than 30 years in the bicycle industry, I have a strong background in bicycle retailing, sales, marketing and customer service. I have a passion for cycling and a dedication to excellence. As a manager, I worked diligently to increase my capabilities and responsibilities, managing up to eleven mechanics and later as a working partner in my own store.
I am adept at managing owned and loan inventory, preparing weekly & annual inventory statements, and managing staff. The role as managing partner also allowed me tremendous freedom. I used this personal freedom to become more deeply involved in my own advancement as a mechanic, to spearhead local trail building, and advocating for cycling both locally and regionally.
As a mechanic, I have several years doing neutral support, experience as a team mechanic, and experience supporting local rides, races, club events. I consistently strive to ensure that bicycles function flawlessly by foreseeing issues and working with the riders, soigneurs, coaches and other mechanics. Even with decades of experience as a shop mechanic and team mechanic, and continue to pursue greater involvement in this sport as a US Pro Mechanic, and UCI Pro Mechanic.
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