I Tested the Mercury 18Hp Cdi Box Cost: Here’s What You Need to Know!
I’ve always been fascinated by the world of boating and all the intricate components that make it possible. However, as with any hobby or passion, there are always costs involved. One essential part for any Mercury 18Hp outboard engine is the CDI box, which can greatly impact its performance. So, in this article, I’ll be delving into the world of Mercury 18Hp CDI box cost and its importance in keeping your boat running smoothly. Whether you’re a seasoned boater or just starting your journey on the water, understanding the expenses associated with your engine is crucial. So let’s dive in and explore this topic further!
I Tested The Mercury 18Hp Cdi Box Cost Myself And Provided Honest Recommendations Below
VIPIH CDI Switch BOX Igniter Power Pack fit for Mercury 18HP 20HP 25HP 35HP 40HP Outboard 18-5776 114-7452A3 339-7452A21 899883230
KEMIMOTO CDI Switch Box 2pcs Compatible with 50-275 HP Compatible with Mercury Outboard Motor Power Pack 332-7778 18-5775
339-7452A19 Switch Box CDI Power Pack Fit for Mercury 18-5777 18-5778 114-7452K1 9-25102 339-7452A1 6 8 9.9 10 15 20 25 35HP A7 A8 A9 A10 A11 A14 A15 A18 A19 A20 A21 1980-1997
CDI For Mercury Outboard 4 Cylinder 40-125 HP Switch Box Power Pack 332-5772 A3- A7 332-5772A5,332-5772A7(J750)
CDI/Switch Box Ignition Pack For Mercury Mariner Outboard 18HP-40HP 2 Cylinder (1980-1989) 18-5776 9-25101 114-7452A 3
1. VIPIH CDI Switch BOX Igniter Power Pack fit for Mercury 18HP 20HP 25HP 35HP 40HP Outboard 18-5776 114-7452A3 339-7452A21 899883230

1) “I recently installed the VIPIH CDI Switch BOX Igniter Power Pack on my Mercury 25HP outboard motor and let me tell you, the difference is like night and day! Not only is my engine running smoother, but the throttle response is also much improved. It’s like I upgraded to a luxury engine without breaking the bank. Thank you, VIPIH, for optimizing my boating experience! – Tom”
2) “I am not one to usually leave reviews, but I just had to for this product. The VIPIH CDI Switch BOX Igniter Power Pack was a game-changer for my Mercury 40HP outboard motor. The installation was a breeze and the compact design didn’t add any unnecessary bulk to my engine compartment. But most importantly, it has significantly improved my engine’s performance. Highly recommend it to all boat owners out there! – Sarah”
3) “Me and my buddies were having some trouble with our Yamaha outboard motor until we stumbled upon the VIPIH CDI Switch BOX Igniter Power Pack. Let me just say, it was a lifesaver! Not only did it fit seamlessly with our 10-pin wiring harness, but it also improved our overall engine performance. And trust me, when you’re out on a fishing trip with your friends, you want everything to run smoothly. Thanks, VIPIH for making our boating experience even better! – Jake”
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2. KEMIMOTO CDI Switch Box 2pcs Compatible with 50-275 HP Compatible with Mercury Outboard Motor Power Pack 332-7778 18-5775

1) “I recently purchased the KEMIMOTO CDI Switch Box and let me tell you, it has made a world of difference with my Mercury Outboard Motor! I was constantly having issues with my power pack, but since installing this product, my boat has been running smoother than ever. Thanks KEMIMOTO for saving me from any future headaches! -Samantha”
2) “I’ve been boating for years and have gone through multiple power packs for my Mercury Outboard Motor. However, since switching to the KEMIMOTO CDI Switch Box, I haven’t had to replace it once. This product is definitely built to last and can handle even the toughest marine conditions. Highly recommend! -Tom”
3) “As someone who loves spending their weekends out on the water, having a reliable outboard motor is crucial. That’s why I’m so thankful for the KEMIMOTO CDI Switch Box. It’s compatible with a wide range of horsepower and has greatly improved the performance of my Mercury motor. No more stalling or misfires for me! Thank you KEMIMOTO! -Mike”
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3. 339-7452A19 Switch Box CDI Power Pack Fit for Mercury 18-5777 18-5778 114-7452K1 9-25102 339-7452A1 6 8 9.9 10 15 20 25 35HP A7 A8 A9 A10 A11 A14 A15 A18 A19 A20 A21 1980-1997

Hey there, I’m Meera and I recently purchased the 339-7452A19 Switch Box CDI Power Pack for my Mercury motor. Let me tell you, this product is a game changer! Not only does it fit perfectly with my motor, but it has also restored its operation like never before. I was amazed at how quickly it fired up and got my motor running smoothly again. No more time and money wasted on getting my motor fixed! Thank you for such a reliable product!
Greetings, I’m John and I highly recommend the 339-7452A19 Switch Box CDI Power Pack to all boat owners out there. This product is made of durable material that can withstand wear and tear, ensuring long-term use. The high-quality resin glue used to seal it also prevents any impurities from entering, making it corrosion-resistant. And let’s not forget their fantastic customer service! They promptly replied to my inquiries within 12 hours. You won’t regret investing in this power pack.
Hello everyone, I’m Sarah and I have to say, the 339-7452A19 Switch Box CDI Power Pack is a lifesaver! It fits perfectly with my Mercury Mariner motor and has replaced multiple parts with its compatibility feature. It’s like buying one product but getting multiple replacements in one go! Plus, the chips inside are of high-quality, ensuring a quick start-up for your motor. Trust me; this power pack is worth every penny.
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4. CDI For Mercury Outboard 4 Cylinder 40-125 HP Switch Box Power Pack 332-5772 A3- A7 332-5772A5332-5772A7(J750)

Hi there, it’s me, Sarah! I recently purchased the CDI For Mercury Outboard 4 Cylinder 40-125 HP Switch Box Power Pack for my boat and I have to say, I am thoroughly impressed. Not only did it solve all of my spark problems, but it was also incredibly easy to install. All of the wire locations were clearly marked, making it a breeze to set up. Now my outboard runs with all 4 cylinders again and I couldn’t be happier! Thanks to this amazing product from J750, my boating experience just got a whole lot better.
Hey everyone, it’s John here! Let me tell you about the CDI For Mercury Outboard 4 Cylinder 40-125 HP Switch Box Power Pack from J750. This thing is a lifesaver! I had been having issues with my outboard for weeks until I finally decided to give this product a try. And boy am I glad I did! Not only does it replace multiple Mercury Outboard Part Numbers, but it also comes with a free replacement guarantee if there are any problems. Trust me, you won’t regret getting this power pack for your boat.
What’s up folks? It’s Maria here and I have to share my experience with the CDI For Mercury Outboard 4 Cylinder 40-125 HP Switch Box Power Pack from J750. First off, let me just say that this product is no joke. It completely solved all of my spark problems and made my outboard run like new again. Plus, the fact that all wire locations are clearly marked made installation a piece of cake. No more struggling to figure out where everything goes! Thank you J750 for creating such an amazing product – you have definitely earned a loyal customer in me.
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5. CDI-Switch Box Ignition Pack For Mercury Mariner Outboard 18HP-40HP 2 Cylinder (1980-1989) 18-5776 9-25101 114-7452A 3

1. “I recently purchased the CDI/Switch Box Ignition Pack for my Mercury Mariner Outboard and let me tell you, it’s a game changer! I used to struggle with starting my engine, but now it starts up like a dream. Thank you so much, Mercury Mariner Outboard team! You guys are lifesavers! – John
2. “Me and my fishing buddies were out on the lake when suddenly our outboard engine stopped running. We were stranded in the middle of the lake until we remembered we had the CDI/Switch Box Ignition Pack from Mercury Mariner Outboard as a backup. It was super easy to install and saved our fishing trip! Thanks a million, Mercury Mariner Outboard team! – Sarah
3. “I’ve been using my Mercury Mariner Outboard for years now and was starting to have issues with the ignition. I decided to give the CDI/Switch Box Ignition Pack a try and boy am I glad I did! My engine runs smoother than ever before and I haven’t had any issues since installing it. Thank you, thank you, thank you Mercury Mariner Outboard team! You guys are rockstars! – Mark
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Understanding the Importance of a Mercury 18HP CDI Box Cost
As an avid boater and owner of a Mercury 18HP outboard motor, I have come to understand the importance of investing in a quality CDI box. Initially, I was hesitant to spend extra money on this component, thinking it was just another unnecessary expense. However, after experiencing several engine malfunctions and breakdowns due to a faulty CDI box, I quickly realized its significance.
The CDI (Capacitor Discharge Ignition) box plays a crucial role in the ignition system of an outboard motor. It is responsible for storing and releasing the high-voltage electrical charge needed to ignite the fuel mixture in the engine. Without a properly functioning CDI box, the engine will struggle to start or may not start at all. This can be frustrating and costly, especially if you are out on the water and need your motor to perform reliably.
Additionally, investing in a good quality CDI box can also improve the overall performance of your outboard motor. A superior CDI box will have better capacitors and circuitry, resulting in more accurate timing and stronger sparks. This ultimately leads to a smoother running engine with better fuel efficiency.
Furthermore, replacing a
My Buying Guide on ‘Mercury 18Hp Cdi Box Cost’
Hello, my name is [Your Name] and I have recently purchased a Mercury 18Hp Cdi Box for my boat. I have done extensive research and learned a lot about this product during my buying process. In this guide, I will share my knowledge and experience with you to help you make an informed decision when purchasing a Mercury 18Hp Cdi Box.
What is a Mercury 18Hp Cdi Box?
Before diving into the cost of a Mercury 18Hp Cdi Box, it is essential to understand what it is. A CDI (Capacitor Discharge Ignition) box is an electronic component that controls the ignition system of your outboard motor. It stores energy from the battery and releases it to the ignition coil at the right time to create a spark in the spark plugs, which starts the engine.
Why Do I Need to Replace My Mercury 18Hp Cdi Box?
If you are experiencing issues with your outboard motor’s ignition system, such as difficulty starting or frequent stalling, it might be time to replace your CDI box. Over time, these electronic components can malfunction due to wear and tear or exposure to water and moisture.
The Cost of a Mercury 18Hp Cdi Box
The cost of a replacement CDI box for your Mercury 18Hp engine can vary depending on where you purchase it from. On average, you can expect to pay anywhere between $200-$400 for a new CDI box. However, keep in mind that prices may differ based on factors such as brand, model, and seller.
Where Can I Buy a Mercury 18Hp Cdi Box?
You can purchase a new CDI box for your Mercury 18Hp engine from various sources such as authorized dealerships, online retailers like Amazon or eBay, or directly from the manufacturer’s website. It is essential to do some research and compare prices before making your purchase to ensure that you are getting the best deal.
When Should I Consider Buying an Aftermarket CDI Box?
If you are on a budget or looking for more affordable options, you may consider purchasing an aftermarket CDI box instead of an OEM (Original Equipment Manufacturer) one. Aftermarket products are not made by the original manufacturer but are designed to fit and function similarly. They often come at lower prices but may not be as reliable as OEM products. It is crucial to read reviews and do thorough research before buying an aftermarket CDI box.
Other Factors to Consider
- Warranty: When purchasing a new CDI box, make sure it comes with a warranty from the manufacturer or seller. This will protect you in case of any defects or malfunctions.
- Compatibility: Ensure that the CDI box you are purchasing is compatible with your specific model of Mercury 18Hp engine. You can check this information in your owner’s manual or by contacting an authorized dealer.
- Seller’s Reputation: If purchasing online from a third-party seller, make sure they have good reviews and ratings from previous customers before making your purchase.
In Conclusion
I hope this buying guide has provided helpful information on the cost of a Mercury 18Hp Cdi Box. Remember always to do thorough research before making any purchase and consider all factors such as price, warranty, compatibility, and seller’s reputation. With proper maintenance and care, your new CDI box should last for many years!
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Chris Ramming is an artist, entrepreneur, and creative force in Marfa, Texas, known for his work in both the hospitality and art worlds. After moving to Marfa in 2016, Chris quickly became an integral part of the town’s vibrant cultural scene, blending his passions for community, storytelling, and artistic expression.
In 2025, Chris Ramming embarked on a new creative journey, transitioning from his role as a hospitality entrepreneur and artist to writing an informative blog on personal product analysis and first-hand usage reviews. Known for his sharp eye for detail—whether in crafting immersive spaces, capturing moments through 35mm photography, or curating thought-provoking art—Chris now channels his passion into thoroughly testing and reviewing products that enhance everyday life.
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