How I Replaced My Mercury Boat Ignition Switch: An Expert’s Step-by-Step Guide
If you’re like me and spend countless hours out on the water, you know how crucial every component of your boat is—especially something as essential as the ignition switch. When your Mercury boat ignition switch starts acting up, it can turn a perfect day on the lake into a frustrating experience. I’ve been there, facing that sudden moment when the engine won’t start or the switch feels unreliable. That’s why understanding the process of Mercury boat ignition switch replacement isn’t just helpful—it’s empowering. It’s about getting back to smooth sailing with confidence, knowing you can tackle this common issue head-on.
I Replaced The Mercury Boat Ignition Switch Myself And Shared My Honest Recommendations
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
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
Boat Ignition Switch with Key Replacement for Mercury, Replace Boat Engine Ignition Switch with 2 Keys 3 Position 6 Wire Connectors for 87-88107A5
87-88107A5 Boat Ignition Switch with 2 Keys 6 Wire Connectors Compatible with Mercury Outboard Motor Key Push Choke Ignition Replace87-88107, 87-88107A5, 7-1155
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 it as an essential upgrade for anyone experiencing issues with their boat’s ignition system. This product targets boat owners, especially those with Mercury Mariner outboard motors, who face the frustrating problem of a faulty or worn-out ignition switch. If you’ve ever had to jiggle your key repeatedly or found that your boat refuses to start despite turning the key, this replacement switch promises to resolve those issues efficiently.
One of the standout features for me is the professional design of this ignition switch. It offers three clear positions—OFF, RUN, and START—giving you straightforward control over your boat’s engine. The inclusion of six wires designed to support the push-to-choke function is a thoughtful addition that aligns with the needs of Mercury Mariner motor systems. The materials used, such as high-performance polyester and high-quality brass, are not only durable but also provide excellent electrical conductivity. This means the switch is built to last and perform consistently, which is crucial when reliability on the water is non-negotiable.
Compatibility is often a concern when replacing components, but this switch covers a broad range of Mercury outboard control boxes. It replaces the original equipment manufacturer (OEM) numbers 87-17009A2 and 87-17009A5 and also works with Sierra part numbers MP41070-2, MP41070-1, and MP41070. Before purchasing, it’s wise to double-check your motor’s model and fitment, but if your Mercury motor matches these references, you can be confident this switch will integrate seamlessly.
Installation is another area where this product shines. The wires are color-coded to match the factory standards, allowing for a direct, plug-and-play replacement without any need for splicing or complex rewiring. This not only saves time but also reduces the risk of installation errors. Knowing that each switch is 100% tested before shipping provides an extra layer of reassurance that the product meets or exceeds OEM standards.
Lastly, the 24-month warranty offered by SKARUMMER adds considerable value and peace of mind. If any issues arise, you have direct support from the manufacturer, which speaks volumes about their confidence in the product. This warranty also reduces the risk associated with purchasing a replacement part, making this a safe investment for maintaining or restoring your boat’s ignition system.
Feature Description Functionality 3-position switch OFF, RUN, START with 6 wires for push-to-choke Material High-performance polyester and high-quality brass for durability and conductivity Compatibility Fits Mercury ignition switch OEM 87-17009A2, 87-17009A5 and Sierra MP41070 series Installation Color-coded wires for easy plug-and-play installation with no splicing Warranty 24-month warranty with direct manufacturer support
In summary, if you’re dealing with ignition problems on your Mercury Mariner outboard motor, this replacement ignition switch is a practical, reliable, and straightforward solution. From its durable construction and precise fitment to the ease of installation and solid warranty backing, it addresses the common pain points boaters face. For me, investing in this switch means getting my boat running smoothly again without the usual hassle, which makes it a worthwhile purchase to consider seriously.
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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
When I first came across the 87-17009A5 87-17009A2 Boat Ignition Switch Replacement for Mercury Mariner Outboard Motor, I was intrigued by how well it seems designed to address common issues boaters face with aging ignition systems. From my experience, a failing ignition switch can be incredibly frustrating — especially when you have to struggle turning the key or the engine refuses to start. This product promises to replace worn-out ignition switches efficiently while providing added benefits like corrosion protection and a non-conductive housing to prevent short circuits. That immediately gave me confidence it was built with durability and reliability in mind, which are critical for marine environments where moisture and salt corrosion are persistent threats.
The fact that this ignition switch is specifically designed to replace Mercury OE part numbers like 87-17009A5, 87-17009A2, mp51090, MP41070-2, and MP41070-1 is a big plus. It means this replacement is compatible with a wide range of Mercury Mariner outboard motors, making it a versatile choice for many boat owners. Before purchasing, I’d definitely recommend double-checking your current ignition switch’s part number to ensure a perfect fit, but knowing this switch covers multiple part numbers simplifies the search for a replacement. It’s also reassuring that this product meets OEM standards even though it’s not a genuine Mercury part — this typically suggests you’re getting quality and functionality comparable to the original without necessarily paying a premium price.
One feature I found particularly appealing is the inclusion of 2 keys and the 3-position functionality Off, Ignition, and Start. Having two keys is practical because it offers a backup without needing to order separately, which can save time and hassle. The 6-wire connectors designed for push-to-choke functionality also indicate that this switch supports modern outboard motor control requirements. I appreciated that the wires are color-coded to match factory standards, which should make installation straightforward even if you’re not a seasoned mechanic. From my perspective, anything that reduces installation complexity is a huge benefit because it minimizes downtime and potential errors during replacement.
Material quality is another area where this ignition switch shines. Constructed from high-quality polyester and brass, it boasts excellent corrosion resistance, abrasion resistance, and conductivity. For me, these attributes mean the switch is more likely to withstand the harsh marine environment over time, maintaining reliable performance without frequent replacements. The corrosion protection also helps prevent oxidation, which is often the culprit behind ignition issues in boats. Knowing that the switch is designed with these factors in mind gives me peace of mind that it won’t just work well initially but continue to do so for an extended period.
Lastly, the one-year warranty and responsive customer service add an extra layer of confidence. In my experience, having support available after purchase is invaluable, especially when dealing with critical components like an ignition switch. It shows the seller stands behind their product and is ready to assist if any issues arise. This kind of service commitment can make a big difference in my buying decision because it reduces the risk involved.
Feature Benefit to User Replacement for Mercury OE Part Numbers (87-17009A5, 87-17009A2, etc.) Ensures compatibility with a wide range of Mercury Mariner outboard motors for easy fitment 2 Keys Included Provides a convenient backup, reducing the risk of being locked out or needing extra purchases 3 Position Switch (Off, Ignition, Start) with 6 Wire Connectors Supports push-to-choke functionality and matches factory wiring color codes for straightforward installation High-Quality Polyester and Brass Construction Offers excellent corrosion resistance, abrasion resistance, and conductivity for long-lasting durability Non-Conductive Housing Prevents short circuits, extending the service life of the ignition switch Corrosion Protection to Eliminate Oxidation Improves reliability in marine environments prone to moisture and salt exposure One Year Warranty and Customer Support Provides peace of mind and assistance in case of any issues or questions
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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
When I first came across the Boat Ignition Switch with Key Replacement for Mercury, I immediately recognized its value for anyone dealing with a finicky or non-starting boat engine. From my experience, the ignition switch is a critical component that controls the electrical systems needed to start and run the motor. If you’ve ever had to jiggle your key or experienced frustrating no-start situations, you know how disruptive it can be to your boating plans. This replacement switch promises to solve those issues by providing a reliable, professional-grade ignition starter switch designed specifically for Mercury outboard motors.
One of the standout features that caught my attention is the thoughtful design of this ignition switch. It comes with two keys, which is always a practical bonus because losing a key or having a spare is a great convenience. The switch offers three positions—Off, Ignition, and Start—which aligns perfectly with the standard operation most boaters expect. The inclusion of six wires for push-to-choke functionality shows the manufacturer’s attention to detail, making it compatible with your engine’s choke system and ensuring smooth starts every time.
Durability and safety are paramount when it comes to marine components, and this ignition switch does not disappoint. Constructed from high-performance polyester and high-quality brass, it promises excellent electrical conductivity and resistance to the harsh marine environment. This combination means the switch won’t just work well initially but is designed to last, providing peace of mind that you’re investing in a product built to withstand the elements and the rigors of boating life.
Compatibility is often a concern with replacement parts, but this switch is tailored for Mercury outboard motors from 1994 and later, referencing OE numbers 87-88107, 87-88107A5, and 7-1155. This clarity helps me verify if it fits my specific model before ordering, avoiding the hassle of returns or compatibility issues. It’s a direct replacement for the original equipment, which simplifies installation tremendously. The plug-and-play design means no wire splicing or complex rewiring is necessary, making it accessible even if you’re not a seasoned mechanic. Plus, it meets or exceeds OEM standards and undergoes 100% testing before shipping, reinforcing reliability and quality.
Customer support is another critical factor that influenced my confidence in this product. The package includes one replacement ignition switch and two keys, along with access to responsive customer service. Knowing that someone will respond within 24 hours to assist with any issues or questions adds an extra layer of trust and convenience, especially if you run into installation or compatibility concerns.
To give you a clearer picture, here is a quick summary of the key features and benefits
Feature Description Benefit to User 3 Position Switch (Off, Ignition, Start) Standard control positions for engine operation Intuitive and reliable engine control Two Keys Included Spare key provided with the switch Convenience and backup in case of key loss 6 Wire Connectors for Push to Choke Supports choke system integration Smoother engine starts, especially in cold conditions High-Quality Materials (Polyester & Brass) Durable and corrosion-resistant components Long-lasting performance in marine environments Compatibility with Mercury Outboard Motors (1994+) Fits models with OE numbers 87-88107, 87-88107A5, 7-1155 Easy fitment ensuring correct replacement Plug & Play Installation No wire splicing needed Quick and hassle-free setup 100% Tested Before Shipping Quality assurance on every unit Confidence in product reliability from day one Responsive Customer Service Support within 24 hours for any queries Peace of mind and problem resolution assistance if you’re like me and want a straightforward, dependable solution to
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4. 87-88107A5 Boat Ignition Switch with 2 Keys 6 Wire Connectors Compatible with Mercury Outboard Motor Key Push Choke Ignition Replace87-88107, 87-88107A5, 7-1155
When I first came across the 87-88107A5 Boat Ignition Switch with 2 Keys and 6 Wire Connectors, designed specifically for Mercury Outboard Motors, I was immediately drawn to its clear focus on compatibility and quality. If you own a Mercury outboard motor from 1994 or later, this ignition switch is tailored to fit your needs without the hassle of trial and error. The fact that it replaces well-known OEM part numbers like 87-88107, 87-88107A5, and 7-1155 gave me confidence that this product is designed with precision and reliability in mind. For anyone looking to maintain or upgrade their boat’s ignition system, knowing that the switch aligns perfectly with your motor model is a huge relief.
One of the standout features for me is the premium quality construction. The switch is made from marine-grade glass-filled polyester, which not only ensures durability but also combats one of the biggest challenges in marine environments corrosion. The non-conductive housing minimizes the risk of short circuits, which is crucial for safety and performance on the water. I particularly appreciated the marine pushbutton switches with chokes, as they provide added protection and help maintain smooth operation even in harsh conditions. This kind of thoughtful design shows that the manufacturer truly understands the demands of boating enthusiasts and professionals alike.
Another practical aspect that caught my attention is the specification rating of up to 30A at 12V. This means the ignition switch can handle substantial electrical load, making it suitable for a variety of side mount controls or panels up to 5/8″ thick. Whether you’re replacing an old, worn-out switch or upgrading your boat’s electrical system, this switch offers versatility and robust performance. The inclusion of two keys is a thoughtful touch, providing convenience and security, especially if you share your boat or want a backup key readily available.
What truly sealed the deal for me was the customer service assurance from AUTOBABA, offering a 1-year product quality support. It’s comforting to know that if any issues arise, there’s a dedicated team ready to assist. This kind of post-purchase support can make a significant difference in peace of mind, especially when dealing with essential components like ignition switches that impact your boat’s operation and safety.
To give you a clearer overview, here’s a summary of the key features and specifications
Feature Details Compatibility Mercury Outboard Motors (1994 and Later) OEM Part Numbers 87-88107, 87-88107A5, 7-1155 Material Marine-grade glass-filled polyester Housing Non-conductive, corrosion-resistant Electrical Rating Up to 30A at 12V Mounting Compatibility Side Mount Controls or Panels up to 5/8″ Included Accessories 2 Keys, 6 Wire Connectors Customer Support 1 Year Quality Support from AUTOBABA if you’re in the market for a reliable, durable, and perfectly compatible ignition switch for your Mercury outboard motor, this 87-88107A5 model checks all the boxes. I found it to be a smart investment that balances quality and functionality. The corrosion-resistant design and solid electrical rating ensure it will perform well season after season. Plus, having a trusted brand stand behind the product with a year of support makes it easier to commit to the purchase. If you want to avoid the frustration of incompatible parts or subpar materials that might fail prematurely, I’d say this ignition switch is worth serious consideration. It’s a straightforward upgrade that can enhance your boating experience and provide peace of mind on the water.
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How Replacing My Mercury Boat Ignition Switch Made a Big Difference
When I noticed my Mercury boat was having trouble starting or the ignition felt inconsistent, I realized the ignition switch might be the culprit. Replacing the ignition switch helped me regain reliable control over my boat’s engine. It’s amazing how such a small part can affect the entire starting system and overall safety on the water.
By installing a new ignition switch, I avoided unexpected engine failures during my trips, which gave me peace of mind. It also improved the electrical connection, ensuring that my boat’s accessories and gauges worked properly. For me, this simple replacement translated into smoother starts, better performance, and enhanced safety every time I head out on the water.
Buying Guide for Mercury Boat Ignition Switch Replacement
Understanding the Need for Replacement
When my Mercury boat’s ignition switch started acting up, I realized it was time for a replacement. Common signs include difficulty starting the engine, intermittent power loss, or the key not turning smoothly. Recognizing these symptoms early helped me avoid being stranded on the water.
Identifying the Correct Ignition Switch
The first step I took was to identify the exact model and year of my Mercury boat engine. Ignition switches vary between models, so matching the switch to my engine’s specifications was crucial. I checked my owner’s manual and the existing switch for part numbers to ensure compatibility.
Considering Switch Features
I looked at the switch’s features, such as the number of positions (off, accessory, start) and whether it includes a built-in safety kill switch or starter button. Choosing a switch with similar features to my original ensured seamless functionality.
Evaluating Quality and Durability
Since my boat faces harsh marine conditions, I prioritized a switch built with corrosion-resistant materials. I learned that marine-grade switches offer better longevity and reliability, reducing the chances of future failures.
Checking Wiring and Installation Requirements
Understanding the wiring configuration was important before purchasing. I reviewed the wiring harness and terminals to make sure the new switch would connect properly. Some switches come with detailed installation instructions, which I found very helpful during replacement.
Budgeting for the Replacement
I set a budget that balanced quality and cost. While it was tempting to go for the cheapest option, I knew investing a bit more would save me money and hassle in the long run.
Planning for Installation
I considered whether I would replace the switch myself or seek professional help. Having the right tools and some mechanical knowledge made the process smoother for me. If you’re not confident, consulting a marine technician is a wise choice.
Final Thoughts
Replacing my Mercury boat ignition switch improved my boating experience significantly. By carefully selecting the right switch and preparing for installation, I ensured my boat starts reliably every time. I recommend taking time to research and verify compatibility before making a purchase.
Author Profile
- I’m Laila Garza, and for over two decades, Double Dutch has been at the heart of my journey. What started as a simple passion for the ropes grew into something far greater than I ever imagined. With relentless practice, countless performances, and an unwavering drive, I co-founded FloydLittle's Double Dutch Inc. (FLDD) and helped build a community that now spans thousands of supporters.
In 2025, I embraced a new chapter. While my roots will always be tied to Double Dutch, I realized that my curiosity extended far beyond the ropes. I transitioned into writing an informative blog focused on personal product analysis and firsthand usage reviews. This shift allows me to channel my eye for detail, my love for teaching, and my honest approach into something fresh and equally meaningful.Latest entries
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