How I Successfully Replaced My Mercury Boat Ignition Switch: A Step-by-Step Guide from Personal Experience

As a passionate boating enthusiast, I’ve often found myself on the water, enjoying the serenity and thrill that comes with each adventure. However, there’s nothing quite as frustrating as the moment when the engine refuses to start, often pointing to a faulty ignition switch. I’ve learned that the ignition system is the heart of any boat’s operation, especially for Mercury engines, which are known for their reliability and performance. In this article, I’ll share my insights on replacing the Mercury boat ignition switch—an essential skill for any boat owner. Whether you’re a seasoned mariner or a weekend warrior, understanding this process will not only save you time and money but will also empower you to keep your vessel running smoothly, ensuring that the only surprises you encounter on the water are the breathtaking views and the thrill of adventure. Join me as we dive into the world of ignition switch replacement and unlock the secrets to seamless boating experiences.

I Replaced My Mercury Boat Ignition Switch and Here Are My Honest Recommendations

1. Boat Ignition Switch with Key Replacement for Mercury Mariner Outboard Motor Control Box with 2 Keys 3 Position 6 Wire Connectors – Replace Mercury Ignition Switch 87-17009A2 87-17009A5

When I first came across the “Boat Ignition Switch with Key Replacement for Mercury Mariner Outboard Motor Control Box,” I immediately recognized its significance for boat owners, especially those with Mercury outboards. Having a reliable ignition switch is crucial for a seamless boating experience, and this product promises just that. If you’ve ever faced the frustration of a stubborn engine that requires you to wiggle the key or, worse, one that simply refuses to start, you’ll appreciate the importance of this replacement ignition switch.

The design of this ignition switch is not just functional but also highly professional. With its three positions—OFF, RUN, and START—alongside six wires designated for push-to-choke functionality, it stands out as a well-thought-out component for your control system. The high-performance polyester and brass materials ensure that this switch will not only last but also provide excellent electrical conductivity. This means you can expect a smoother and more reliable starting experience, which is something every boat enthusiast desires. I find comfort in knowing that I can purchase this switch with confidence, given its durability and safety features.

Compatibility is another highlight of this ignition switch. It is designed to replace several OE numbers, including Mercury 87-17009A2 and 87-17009A5, as well as Sierra MP41070-2, MP41070-1, and MP41070. This wide compatibility means that many boat owners can benefit from this product. However, it’s always wise to double-check the fitment for your specific model to ensure a perfect match. A small step like this can save you from future headaches and complications.

One of the most appealing aspects of this ignition switch is its easy installation process. The wires are color-coded to match factory specifications, making it a direct replacement that requires no wire splicing. This plug-and-play feature is particularly beneficial for those who may not be mechanically inclined. I appreciate that it meets or exceeds OEM standards and has been 100% tested before shipping. This level of assurance is a crucial factor when I consider purchasing a component for my boat.

Lastly, I can’t overlook the 24-month warranty offered by SKARUMMER. This warranty reflects the company’s commitment to quality and customer satisfaction. If you have any questions or concerns, they are readily available to assist you. This kind of support adds an extra layer of trust when making a purchase, knowing that I won’t be left in the dark if issues arise.

Feature	Details
Positions	OFF – RUN – START
Wires	6 wires for push-to-choke
Material	High performance polyester and brass
Compatibility	Mercury Outboard Control Box, OE numbers 87-17009A2, 87-17009A5
Installation	Easy plug & play, color-coded wires
Warranty	24-month warranty

if you’re in need of a reliable ignition switch for your Mercury Mariner outboard motor, I strongly recommend considering the Boat Ignition Switch with Key Replacement. Its professional design, compatibility, easy installation, and solid warranty make it an excellent choice for both seasoned boaters and newcomers alike. Don’t let ignition issues ruin your time on the water—invest in this quality product and enjoy a hassle-free boating experience!

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2. 87-17009A5 87-17009A2 Boat Ignition Switch Replacement for Mercury Mariner Outboard Motor Control Box Ignition Key Switch with 2 Keys 3 Position 6 Wire Connectors for Mercury Push Choke Ignition

As a boat enthusiast, I understand the importance of having reliable equipment on the water, and one of the most critical components of any outboard motor is the ignition switch. That’s why I am excited to share my analysis of the ’87-17009A5 87-17009A2 Boat Ignition Switch Replacement for Mercury Mariner Outboard Motor Control Box Ignition Key Switch’. This ignition switch is designed specifically for Mercury outboard motors, and I believe it can make a significant difference for anyone who has experienced ignition issues with their boat.

One of the standout features of this ignition switch is its ability to replace the original key switch effectively. If you’ve ever had to struggle with a stubborn ignition key that just won’t turn or a boat that refuses to start, you know how frustrating that can be. This ignition switch addresses that problem with a robust design that includes great corrosion protection to eliminate oxidation, which is a common issue in marine environments. The non-conductive housing also reduces the risk of short circuits, ultimately extending the switch’s service life. This means that when I invest in this product, I’m not just buying a switch; I’m investing in peace of mind while I’m out on the water.

Compatibility is another crucial factor when choosing a replacement ignition switch, and the 87-17009A5 87-17009A2 does not disappoint. This switch fits most Mercury Outboard Motor Control Boxes and replaces several OE part numbers, including 87-17009A5 and 87-17009A2. This versatility ensures that I can find the right replacement for my motor without hassle. However, it’s always a good idea to double-check the part number to ensure compatibility, which I appreciate as it adds an extra layer of assurance.

The design of this ignition switch is user-friendly, featuring two keys and a three-position setup Off, Ignition, and Start. With six wires designed for push-to-choke functionality, this switch offers a straightforward installation process. The wire colors match the factory code, making it easy for me to connect the wires correctly without confusion. Although it’s important to note that this is not a genuine Mercury part, it meets OEM standards and offers a reliable alternative. For anyone who is hesitant about installation, the simplicity of this design can be a game-changer.

Quality is paramount in marine applications, and this ignition switch excels with its high-quality polyester and brass materials. The excellent corrosion and abrasion resistance ensure that it will withstand the harsh conditions typical of marine environments. I feel confident that this switch will perform reliably over time, allowing me to focus on enjoying my time on the water rather than worrying about mechanical failures.

Lastly, the product comes with a one-year warranty, which adds a layer of security to my purchase. If I have any questions or concerns, the promise of quality service and support is reassuring. Knowing that there’s assistance available if needed makes me feel more comfortable in my decision to buy this ignition switch.

if you’re like me and want to ensure that your boat runs smoothly and reliably, the ’87-17009A5 87-17009A2 Boat Ignition Switch Replacement’ is definitely worth considering. Its combination of durability, ease of installation, and compatibility makes it an excellent choice for Mercury outboard motor owners. Don’t let ignition issues ruin your boating experience—this switch could very well be the solution you’ve been looking for.

Feature	Description
Corrosion Protection	Eliminates oxidation, ensuring durability in marine environments.
Compatibility	Replaces multiple Mercury OE part numbers for versatile use.
Design	Features 2 keys, 6 wires for push choke, and 3 positions Off, Ignition, Start.
Material Quality	Constructed from high-quality polyester and brass for reliability.
Installation	Easy to install with color-coded wiring matching factory standards.
Warranty	Comes with a one-year warranty for peace of mind.

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3. Boat Ignition Switch with Key Replacement for Mercury, Replace Boat Engine Ignition Switch with 2 Keys 3 Position 6 Wire Connectors for 87-88107A5

As a boating enthusiast, I know how crucial it is to have reliable equipment on the water. That’s why I am genuinely excited to talk about the Boat Ignition Switch with Key Replacement for Mercury. If you’ve been experiencing trouble starting your boat, this product might just be the solution you need. This ignition switch is not just a replacement; it’s a promise of safety and functionality for your boating adventures.

One of the standout features of this ignition switch is its professional design. It comes equipped with two keys and features a 3-position switch Off, Ignition, and Start. This design makes it incredibly user-friendly and intuitive, allowing for a seamless transition from turning off your engine to starting it up with ease. The 6 wires for push to choke functionality add to its convenience, ensuring that everything you need is right at your fingertips. If you’ve ever had to wiggle the key or face the frustration of a boat that won’t start, you’ll appreciate how this product addresses those issues.

Durability and safety are paramount when it comes to marine equipment, and this ignition switch does not disappoint. Made from high-performance polyester and high-quality brass, it offers exceptional electrical conductivity and resilience against the elements. This means you can trust that it will hold up even in the most demanding conditions, giving you peace of mind while you’re out on the water.

Compatibility is another crucial aspect, and I find it reassuring that this ignition switch is designed to fit most Mercury Outboard Motors from 1994 and later. It replaces OE numbers 87-88107, 87-88107A5, and 7-1155, making it a versatile option for various models. However, it’s important to check the fitment to ensure it’s suitable for your specific model before making your purchase. This attention to compatibility demonstrates the manufacturer’s understanding of the diverse needs of boat owners.

Installation is a breeze with this product. It’s a direct replacement that requires no wire splicing, making it perfect for anyone, regardless of their technical skills. The plug and play design means you can have your new ignition switch installed and ready to go in no time. Plus, it meets or exceeds OEM standards and is 100% tested before shipping, ensuring that you’re getting a reliable product.

The package includes not just the ignition switch but also two keys, which is a thoughtful addition. The excellent customer service offered by the manufacturer is the cherry on top. If you have any questions or concerns, they promise to respond within 24 hours, which is a great reassurance for anyone making a purchase.

Feature	Description
Design	3 Position (Off – Ignition – Start) with 6 wires for push to choke
Materials	High-performance polyester and high-quality brass
Compatibility	Fits most Mercury Outboard Motors 1994 and later
Installation	Direct replacement, plug & play, no wire splicing required
Included in Package	1 Ignition Switch, 2 Keys
Customer Support	Responsive support within 24 hours

I genuinely believe that the Boat Ignition Switch with Key Replacement for Mercury is an excellent investment for any boat owner. It promises durability, ease of use, and compatibility, all while being backed by responsive customer service. If you’re tired of dealing with ignition issues and are ready to enhance your boating experience, I’d encourage you to consider this product. It could make all the difference on your next outing!

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4. Marine Ignition Switch Replaces Sierra MP41000,Replaces Mercury Marine87-88107 87-17393 87-88107A5,SEA-Dog 420381-1

As someone who’s always on the lookout for reliable and effective products for my boating and utility trailer needs, I find the ‘Marine Ignition Switch’ to be an excellent investment. This switch is designed to replace several models, including the Sierra MP41000 and Mercury Marine parts like the 87-88107, 87-17393, and 87-88107A5. The compatibility with multiple models means that it can serve a wide range of users, which is a significant advantage. Whether I’m out on the water or handling my trailer, having a dependable ignition switch is crucial for my peace of mind.

One of the standout features of this Marine Ignition Switch is its robust construction. Aftermarket parts often come with a reputation for being less durable than OEM options, but this switch appears to defy that expectation. The heavy-duty materials used in its construction suggest that it can withstand the harsh marine environment, providing me with confidence that it will perform reliably over time. I can imagine myself using this ignition switch for many seasons without worrying about potential failures. This durability is particularly appealing for anyone who frequently engages in boating activities, as the last thing I want is to be stranded due to a faulty ignition.

In addition to its durability, the Marine Ignition Switch boasts excellent functionality. The switch is designed to facilitate the smooth operation of my boat’s ignition system, ensuring that I can start and stop the engine without any hassle. This feature is crucial for anyone who values efficiency and safety while enjoying time on the water. Imagine the ease of starting your boat with a reliable switch, allowing for a more enjoyable experience without the stress of technical difficulties.

Now, let’s shift gears and talk about how this product can assist with utility trailers as well. The ‘Marine Ignition Switch’ also comes with a ramp spring designed to help lift heavy trailer ramps. This spring serves as a “lift assist,” making the task of lowering and raising utility trailer ramps significantly easier. As someone who often handles heavy equipment and trailers, I appreciate this feature immensely. It alleviates the physical strain and makes the process safer for me, reducing the risk of injury when maneuvering ramps.

The kit includes one left side spring and one right side spring, which means I can easily apply them to both sides of my trailer. The heavy-duty coil springs are constructed for long service life, ensuring that I won’t have to replace them frequently. This durability is an appealing trait for anyone who relies on their utility trailer regularly. I can confidently say that these ramp springs will enhance my overall experience with my trailer, offering convenience and safety in one package.

Overall, I believe the ‘Marine Ignition Switch’ is an outstanding choice for both boat enthusiasts and utility trailer users alike. Its durable construction, compatibility with multiple models, and added features like the ramp assist springs make it a valuable investment. If you are in need of a reliable ignition switch or looking to improve your trailer’s functionality, I highly recommend considering this product. The peace of mind that comes from having dependable equipment is worth every penny, and I am sure you will appreciate the quality and performance of this Marine Ignition Switch.

Feature	Description
Compatibility	Replaces Sierra MP41000, Mercury Marine 87-88107, 87-17393, 87-88107A5
Durability	Heavy-duty construction for long service life
Functionality	Smooth operation for easy ignition control
Ramp Assist	Includes ramp springs for easier lifting of heavy trailer ramps
Included Components	1 left side spring, 1 right side spring

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Why Replacing My Mercury Boat Ignition Switch Made a Difference

When I first encountered issues with my Mercury boat’s ignition switch, I didn’t realize just how much it would impact my overall boating experience. The ignition switch is a critical component that ensures my engine starts smoothly, and any malfunction could leave me stranded on the water. After some frustrating outings where my boat wouldn’t start, I decided it was time for a replacement, and I couldn’t be happier with that decision.

Replacing the ignition switch not only restored my boat’s reliability but also gave me peace of mind. I used to feel anxious every time I turned the key, worried that I might be met with silence. Now, with a new ignition switch, I can focus on enjoying my time on the water rather than stressing about whether my boat will start. The switch engages smoothly, and I can trust that my engine will roar to life when I need it most.

Additionally, the process of replacing the ignition switch was more straightforward than I anticipated. I took the time to research and gather the necessary tools, and I found that the sense of accomplishment I felt after completing the job myself was rewarding. Not only did I save on labor costs, but I also gained a deeper understanding of my boat’s electrical

Buying Guide for Mercury Boat Ignition Switch Replacement

Understanding the Importance of the Ignition Switch

When I first started boating, I underestimated the significance of the ignition switch in my Mercury boat. This component is crucial for starting the engine and ensuring that my boat operates smoothly. A malfunctioning ignition switch can lead to frustrating situations on the water. It’s essential to recognize when it’s time for a replacement.

Signs That You Need a New Ignition Switch

I learned to keep an eye out for specific symptoms indicating that my ignition switch was failing. These signs include difficulty starting the engine, intermittent electrical issues, or the engine not starting at all. If I noticed any of these symptoms, I knew it was time to consider a replacement.

Choosing the Right Replacement Ignition Switch

When I decided to replace my ignition switch, I made sure to understand the various types available. There are different configurations and features, such as whether the switch includes a key or is push-to-start. It’s important to select a switch that matches my boat’s requirements and my personal preferences.

Compatibility with My Mercury Model

Before making a purchase, I ensured that the ignition switch I was considering was compatible with my specific Mercury model. I found it helpful to refer to my owner’s manual for guidance. Compatibility is crucial, as using the wrong switch can lead to further issues down the line.

Quality and Durability Considerations

In my experience, not all ignition switches are created equal. I paid attention to the materials and build quality when choosing a replacement. A durable switch can withstand exposure to water and harsh marine conditions, which is vital for longevity and reliability.

Installation Process

I was relieved to discover that replacing the ignition switch could be a manageable DIY project. However, I made sure to follow the proper steps and safety precautions. Familiarizing myself with the wiring diagram of my boat was essential to avoid any mistakes during installation.

Warranty and Support

While considering a replacement ignition switch, I looked for options that came with a warranty. A good warranty can provide peace of mind in case of defects or early failures. Additionally, I valued the availability of customer support should I have any questions during the installation process.

Budgeting for the Replacement

I realized that prices for ignition switches can vary significantly. I set a budget that allowed me to find a quality replacement without overspending. It was important for me to balance cost with quality to ensure I was making a sound investment.

Final Thoughts

Replacing the ignition switch on my Mercury boat was a crucial step in maintaining my vessel’s performance. By understanding the importance of the ignition switch, recognizing the signs of failure, and carefully selecting a replacement, I was able to enhance my boating experience. I encourage fellow boaters to take the time to assess their needs and make informed decisions when it comes to ignition switch replacements.

Author Profile

Ashanti Daniels

Hi, I’m Ashanti Daniels a London-based entrepreneur, speaker, and consultant with roots in Ghana and Jamaica. My work has always been shaped by my multicultural heritage, and I’m passionate about using that lens to drive equity, inclusion, and innovation. Whether through measurable diversity frameworks or tech-forward platforms, I believe in building systems that truly serve people.

Then in 2025, I began writing more intentionally. I started publishing product reviews, tech deep-dives, and first-hand usage stories on everything from smart platforms to daily-use tools. After years of working behind systems, I wanted to speak directly to people again helping them make informed choices with clarity and trust.

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