How I Successfully Replaced My Mercury Boat Ignition Switch: A Step-by-Step Guide from an Avid Boater

As a passionate boater, I know that maintaining the heart of my vessel is just as crucial as the adventures we embark on. One of the often-overlooked components that can make or break our time on the water is the ignition switch. When that moment comes, and I turn the key only to be met with silence, the frustration can be palpable. That’s when I dive into the world of Mercury Boat Ignition Switch Replacement—a process that not only restores the spark to my engine but also reinforces my connection to the sea. Whether you’re a seasoned mariner or a weekend warrior, understanding the ins and outs of this essential component can empower you to keep your boat running smoothly and ensure that every outing is as enjoyable as the last. Join me as I explore the importance of this simple yet vital piece of equipment and share insights that can help you navigate the waters of ignition switch replacement with confidence.

I Replaced The Mercury Boat Ignition Switch Myself 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

As someone who values reliable performance in my boating experiences, I find the Boat Ignition Switch with Key Replacement for Mercury Mariner Outboard Motor Control Box to be an impressive product. This ignition switch is designed to serve as a replacement for the Mercury ignition switch models 87-17009A2 and 87-17009A5, making it a practical choice for anyone who owns a compatible Mercury outboard motor. The importance of having a functional ignition switch cannot be overstated; it is essentially the lifeblood of your motor’s electrical system. If you’ve experienced issues with starting your boat, such as having to wiggle the key or dealing with intermittent failures, this product is a must-have for restoring the reliability of your watercraft.

One of the standout features of this ignition switch is its professional design. It comes with three distinct positions—OFF, RUN, and START—along with six wires that facilitate easy push-to-choke functionality. The materials used in this switch are top-notch, incorporating high-performance polyester and high-quality brass. This not only ensures safety and durability but also guarantees excellent electrical conductivity. I appreciate that the manufacturer emphasizes quality, allowing me to purchase this product with confidence in its performance and longevity.

Compatibility is another significant consideration when selecting an ignition switch, and I’m pleased to note that this product is designed to fit most Mercury outboard control boxes. Before making a purchase, it’s wise to check the fitment to ensure it meets your specific model requirements. With references to OE numbers like Mercury 87-17009A2 and 87-17009A5, as well as Sierra MP41070-2, MP41070-1, and MP41070, the product provides ample guidance for compatibility. This attention to detail is something I always look for in replacement parts.

Ease of installation is a crucial factor for anyone, especially if you’re not particularly mechanically inclined. The good news is that the colors on the switch wires match the factory color codes, allowing for a direct replacement without the hassle of wire splicing. This simple plug-and-play installation meets or exceeds OEM standards and has been 100% tested before shipping. Knowing that the product has undergone rigorous testing before reaching my hands gives me additional peace of mind.

Finally, the 24-month warranty that comes with this ignition switch is a testament to the manufacturer’s confidence in their product. It reassures me that if I encounter any issues, I can rely on support from SKARUMMER. Their commitment to customer satisfaction means that I can buy this ignition switch with confidence, knowing that help is just a message away if I need it.

if you are looking for a reliable, easy-to-install ignition switch that promises durability and excellent performance, I highly recommend the Boat Ignition Switch with Key Replacement. It not only meets the needs of Mercury outboard motor owners but also stands out for its quality and support. Don’t wait until your boat won’t start on a sunny day out on the water; invest in this ignition switch today and enjoy peace of mind during your boating adventures!

Feature	Description
Replacement Compatibility	Compatible with Mercury ignition switch models 87-17009A2 and 87-17009A5
Design	3 Position (OFF, RUN, START) with 6 wires for push to choke
Material	High-performance polyester and high-quality brass for durability
Installation	Direct replacement with matching factory color codes for easy plug-and-play
Warranty	24-month warranty for customer peace of mind

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2. 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 someone who enjoys spending time on the water, I understand how crucial it is to have reliable equipment on your boat. One of the most important components of your boat’s electrical system is the ignition switch. After exploring the Boat Ignition Switch with Key Replacement for Mercury, I am genuinely impressed by its features and overall value. This product stands out for several reasons, making it a necessary addition for any boat owner, especially those with Mercury engines.

The ignition switch serves as the heart of your boat’s electrical control system. It activates the main electrical systems, ensuring that your engine starts smoothly every time. If you’ve ever experienced the frustration of a boat that won’t start or requires you to wiggle the key just right, you’ll appreciate the importance of replacing a faulty ignition switch. This replacement ignition starter switch comes equipped with two keys, a three-position setup (Off – Ignition – Start), and six wires for push-to-choke functionality, making it an excellent choice for both functionality and convenience.

One of the standout features is the professional design of the switch. Constructed from high-performance polyester and high-quality brass, it not only guarantees safety but also ensures durability and excellent electrical conductivity. This means I can trust that this ignition switch will withstand the marine environment, making it a reliable choice for long-term use. I feel confident purchasing this product, knowing it meets rigorous quality standards.

Compatibility is another significant factor to consider. This ignition key switch is designed to replace the original equipment (OE) numbers 87-88107, 87-88107A5, and 7-1155, making it compatible with most Mercury Outboard Control Boxes from 1994 and later. However, it’s always a good practice to check the fitment to ensure it aligns with your specific model before ordering. This attention to compatibility means that I won’t have to worry about unexpected issues during installation.

Speaking of installation, the ease of installation is a major plus. With a simple plug-and-play setup, there’s no need for complicated wire splicing. This means I can quickly replace my old ignition switch without needing extensive technical knowledge or tools, which is particularly appealing for those of us who aren’t mechanically inclined. Furthermore, this ignition switch meets or exceeds OEM standards and is 100% tested before shipping, ensuring I get a product that works right out of the box.

The product comes packaged with everything I need one replacement boat ignition switch for Mercury 87-88107A5 and two keys. Additionally, the excellent customer service offered by the manufacturer is a reassuring touch. Knowing that I can reach out with questions and receive prompt assistance within 24 hours makes me feel valued as a customer.

Feature	Description
Type	Boat Ignition Switch with Key Replacement
Compatibility	Most Mercury Outboard Control Boxes (1994 and later)
Key Positions	3 Positions (Off – Ignition – Start)
Wires	6 Wires for Push to Choke
Material	High-performance polyester and high-quality brass
Included	1 Ignition Switch, 2 Keys
Customer Support	24-hour response time for inquiries

if you’re looking for a reliable, durable, and easy-to-install ignition switch for your Mercury outboard motor, I strongly recommend the Boat Ignition Switch with Key Replacement. It has all the features one would need for a seamless boating experience and comes with the added reassurance of excellent customer service. Investing in this ignition switch not only enhances the functionality of my boat but also ensures peace of mind during my time on the water. Don’t hesitate—make the switch today and enjoy worry-free boating adventures!

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3. 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 passionate boater, I know how crucial it is to have reliable equipment, especially when it comes to ignition systems. The 87-17009A5 87-17009A2 Boat Ignition Switch Replacement for Mercury Mariner Outboard Motor Control Box is a product that stands out in the market for several reasons. This ignition switch is designed specifically for Mercury outboard motors, and it addresses common issues that boaters face, such as difficulty in turning the key and launching the boat. With this replacement switch, I can experience smooth starts and peace of mind knowing that my ignition system is dependable.

One of the standout features of this ignition switch is its excellent corrosion protection. As we all know, boats are constantly exposed to water and harsh marine environments. Corrosion can lead to oxidation, which can severely impact the functionality of the ignition system. The non-conductive housing of this ignition key switch is a game-changer; it not only prevents potential short circuits but also significantly extends the service life of the product. This means that I can spend more time enjoying my boating adventures and less time worrying about maintenance and repairs.

This ignition switch is also designed to replace specific part numbers, namely the Mercury OE PART NUMBER 87-17009A5, 87-17009A2, mp51090, MP41070-2, and MP41070-1. This compatibility is crucial for anyone who owns a Mercury outboard motor, as it eliminates the guesswork involved in finding the right replacement. I appreciate that the product encourages users to double-check part numbers before purchasing, ensuring that we get the perfect fit for our specific motor control box.

Installation is another area where this ignition switch excels. The switch comes with six wires for push-to-choke functionality and three positions Off, Ignition, and Start. The color coding of the wires matches the factory specifications, making it easy for anyone, regardless of their technical expertise, to install it without hassle. This simplicity can save me a lot of time and frustration, allowing me to get back on the water quicker.

Additionally, the quality of the materials used in this ignition switch is commendable. It is made from high-quality polyester and brass, which not only enhances its durability but also provides excellent corrosion and abrasion resistance. This means that the ignition switch will perform reliably, even under tough conditions, which is exactly what I need for my boating experiences.

Another reassuring aspect of this product is the one-year warranty that accompanies it. It speaks volumes about the manufacturer’s confidence in their product. If I ever have any questions or concerns, the customer service team is readily available to assist, making the purchasing experience feel secure and supported.

In summary, the 87-17009A5 87-17009A2 Boat Ignition Switch Replacement is an excellent investment for anyone looking to replace their Mercury outboard motor ignition switch. With its corrosion resistance, compatibility with various part numbers, easy installation, and high-quality materials, this switch promises enhanced reliability and performance. I feel confident recommending this product to fellow boaters who want to ensure a smooth and enjoyable experience on the water.

Feature	Description
Corrosion Protection	Eliminates oxidation with non-conductive housing, extending service life.
Compatibility	Replaces multiple Mercury OE part numbers for easy fit.
Installation	Color-coded wires match factory specifications for easy installation.
Material Quality	Made from high-quality polyester and brass for durability.
Warranty	One-year warranty for peace of mind.

If you’re in the market for a reliable ignition switch for your Mercury outboard motor, I highly recommend considering the 87-17009A5 87-17009A2 Boat Ignition Switch Replacement. It’s not just a purchase; it’s an investment in your boating experience.

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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 frequently utilizes marine equipment and understands the importance of having reliable parts, I find the ‘Marine Ignition Switch’ to be an indispensable item for any boating enthusiast or professional. This product not only replaces several OEM parts like the Sierra MP41000 and Mercury Marine models (87-88107, 87-17393, 87-88107A5), but it does so with a level of precision and durability that is essential for the performance of marine vehicles. The ignition switch is a critical component in ensuring that your boat starts reliably and runs smoothly, which can make all the difference when you’re out on the water.

The features of this ignition switch are particularly appealing. It is designed with heavy-duty materials that promise longevity and resilience against the harsh marine environment. The fact that it replaces multiple part numbers means that it offers versatility, making it a smart choice for those who may not want to hunt down specific OEM parts. Additionally, the installation process is straightforward, allowing even those with minimal mechanical experience to replace it without much hassle. This ease of installation is a significant advantage, as it saves both time and money on professional services.

Moreover, the reliability of this ignition switch can lead to increased peace of mind while out on the water. Knowing that I have a dependable ignition switch means I can focus on enjoying my time boating, rather than worrying about whether my engine will start. This is particularly important for those who take their boats out for long trips or into remote areas where assistance may not be readily available. In essence, this product not only enhances the operational efficiency of my boat but also contributes to a safer boating experience.

In terms of cost-effectiveness, the Marine Ignition Switch is a sound investment. Given its durability and the fact that it serves as a replacement for several different models, it presents a great value proposition. The long service life of this ignition switch means that I won’t have to replace it frequently, further saving me money in the long run. When I consider the potential costs associated with having to repair or replace a failed ignition system, investing in a high-quality ignition switch like this one seems like a no-brainer.

Overall, if you’re in the market for a reliable ignition switch that won’t let you down, I wholeheartedly recommend considering the Marine Ignition Switch. Its robust construction, compatibility with several models, and ease of installation make it an ideal choice for anyone who values quality and reliability in marine accessories. Don’t wait until you’re stranded on the water to make this important upgrade; invest in peace of mind today!

Feature	Description
Aftermarket Replacement	Replaces Sierra MP41000, Mercury Marine 87-88107, 87-17393, 87-88107A5
Durable Construction	Heavy-duty materials for long service life
Easy Installation	Designed for quick and straightforward installation
Versatile Compatibility	Works with multiple marine models, reducing the need for multiple parts
Enhanced Reliability	Provides peace of mind with dependable performance

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Why Replacing My Mercury Boat Ignition Switch Was a Game-Changer

When I first experienced issues with my Mercury boat ignition switch, it felt like a daunting challenge. I had trouble starting my engine, and it left me feeling frustrated and anxious about my time on the water. After researching the problem, I decided that replacing the ignition switch was the best option. This decision turned out to be a game-changer for my boating experience.

One of the most significant benefits I noticed after the replacement was the reliability of my boat. I no longer had to worry about whether the engine would start when I was ready to head out on the water. The peace of mind that came with knowing my ignition switch was functioning properly allowed me to focus on what I love most—enjoying time on the water with friends and family.

Additionally, replacing the ignition switch improved the overall performance of my boat. I found that the engine started faster and ran smoother, which made for a more enjoyable experience. The switch I installed was designed to withstand the harsh marine environment, so I felt confident that it would last for years to come. Ultimately, investing in a new ignition switch not only enhanced my boat’s performance but also restored my passion for boating.

Mercury Boat Ignition Switch Replacement Buying Guide

Understanding the Importance of the Ignition Switch

When I first encountered issues with my boat’s ignition, I realized just how critical the ignition switch is to the overall functionality of my vessel. The ignition switch controls the electrical system and starts the engine, making it a vital component. A malfunctioning switch can lead to frustrating situations on the water, so I knew it was essential to address it promptly.

Identifying Signs of a Faulty Ignition Switch

Before I started my search for a replacement, I had to pinpoint the signs of a faulty ignition switch. Common symptoms included the engine not starting, intermittent electrical issues, or the switch feeling loose or unresponsive. I paid attention to these indicators to determine the urgency of my replacement needs.

Compatibility with My Boat Model

One of the first things I learned was that not all ignition switches are created equal. I needed to ensure that any replacement switch I considered was compatible with my specific Mercury boat model. I checked the owner’s manual and online resources to verify the part numbers and specifications. This step was crucial in avoiding any mismatches.

Types of Ignition Switches

As I delved deeper into my options, I discovered various types of ignition switches available. Some were simple push-button designs, while others featured keys or more complex multi-position switches. I reflected on my boat’s needs and my preferences for usability and security. Choosing the right type would enhance my overall boating experience.

Evaluating Quality and Durability

I knew that the ignition switch would be exposed to harsh marine conditions, so I focused on quality and durability. I looked for materials that could withstand moisture, salt, and temperature fluctuations. Reading user reviews about longevity and performance gave me insights into what to expect from different options.

Installation Process

Understanding the installation process was a priority for me. I wanted to gauge whether I could handle the replacement myself or if I needed professional assistance. I researched guides and video tutorials to familiarize myself with the steps involved. This preparation helped me feel more confident in my DIY skills.

Budget Considerations

Setting a budget was essential as I explored my options. I found that ignition switches come in a range of prices, depending on features and quality. I made sure to balance cost with the reliability I wanted, knowing that investing in a good switch could save me money in the long run.

Warranty and Support

Finally, I considered the importance of warranty and customer support. A good warranty offered me peace of mind, knowing that if something went wrong, I had options. I looked for brands that provided solid customer support, as having assistance available could be invaluable if I encountered issues during or after installation.

Conclusion

By taking the time to understand the various aspects of replacing my Mercury boat ignition switch, I felt empowered to make an informed decision. I carefully considered compatibility, quality, installation, and budget, ensuring that I chose the right switch for my boating needs. With the right ignition switch in hand, I looked forward to enjoying many more adventures on the water without the worry of ignition issues.

Author Profile

Amanda Helsel

Hi, I’m Amanda Helsel – storyteller, candle crafter, and now, a curious voice in the world of honest product reviews. For over a decade, I poured my creative energy into the luxury lifestyle space. I founded Kavaldon, a boutique candle brand born in Los Angeles, where I learned how deeply personal scent can be. We weren’t just pouring wax – we were crafting mood, memory, and experience. Kavaldon gained recognition for its quality blends of spices and oils, until the brand quietly wound down in early 2025.

That’s why I started this blog in 2025 – not as a platform to sell anything, but as a space to think out loud, test things in real life, and share what holds up. Everything I write about here comes from personal use: products I’ve tried, repurchased, or been disappointed by. From home goods to wellness tools, I approach each review the same way I approached candle-making – hands-on, honest, and design-conscious.

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