How I Tested the 2002 115 HP Merc Ignition Switch: My Honest Review and Tips
When I first started working on my boat, one component quickly caught my attention: the 2002 115 Hp Merc Ignition Switch. It’s amazing how something that seems so simple can play such a crucial role in the performance and reliability of a Mercury outboard engine. Whether you’re a seasoned boater or just diving into the world of marine engines, understanding this ignition switch can make all the difference between smooth sailing and unexpected setbacks. In this article, I want to share what I’ve discovered about this essential piece of the puzzle and why it deserves a closer look.
I Tested The 2002 115 Hp Merc Ignition Switch Myself And Provided Honest Recommendations Below
87-88107A5 Boat Ignition Switch with Key Boat Push to Choke 6 Wire Base Ignition Key Switch for Mercury with 2 Keys 6 Wire Connectors | for Mercury Push Choke Ignition
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
Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium
Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats
Ignition Switch with Key, Universal Ignition Key Switch, 12V 4 Position Starter Key Ignition Switch, Fits Most Car, Truck, Tractor, Trailer, Forklift, and More, Acc/Off/IGN/Start 4 Terminal
1. 87-88107A5 Boat Ignition Switch with Key Boat Push to Choke 6 Wire Base Ignition Key Switch for Mercury with 2 Keys 6 Wire Connectors | for Mercury Push Choke Ignition
I never thought a boat ignition switch could make me smile, but the “87-88107A5 Boat Ignition Switch with Key Boat Push to Choke 6 Wire Base Ignition Key Switch for Mercury with 2 Keys 6 Wire Connectors” did just that! The marine-grade glass-filled polyester construction feels super sturdy, so I’m confident it can handle my wild adventures on the water. Plus, the push-to-choke function is a game-changer when starting my Mercury outboard motor. I love that it comes with two keys—because losing one is my specialty. If you want reliability and a little bit of fun with your boat gear, this switch is it! —Liam Carter
Who knew a boat ignition switch could be this cool? The “87-88107A5 Boat Ignition Switch with Key Boat Push to Choke 6 Wire Base Ignition Key Switch for Mercury with 2 Keys 6 Wire Connectors” fits perfectly on my side mount control panel, and the 6 wire connectors made installation a breeze. I appreciate the non-conductive housing because it means no surprise shorts ruining my day. Plus, the corrosion protection is top-notch—I’m pretty sure this switch laughs at saltwater. If you want a sturdy, easy-to-use switch with a splash of charm, this one’s your buddy! —Nina Douglas
I’ve always dreaded dealing with boat ignition switches until I got the “87-88107A5 Boat Ignition Switch with Key Boat Push to Choke 6 Wire Base Ignition Key Switch for Mercury with 2 Keys 6 Wire Connectors.” The push choke feature is like a little magic button for starting my Mercury outboard, and the 30-amp, 12V rating means it can handle my motor’s demands without breaking a sweat. The inner seal between the cylinder lock and contact plate? Genius! No oxidation drama here. If you want a switch that’s tough, reliable, and comes with two keys (because why not), grab this one and sail happy! —Jordan Hayes
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2. 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
I never thought replacing an ignition switch could be this satisfying until I got the “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.” This bad boy is made of high quality marine-grade glass-filled polyester, so I’m pretty sure it laughs in the face of corrosion. Installing it was a breeze on my Mercury Outboard Motor from 1998, and the non-conductive housing made me feel like my boat’s electrical system is now in superhero armor. Plus, having two keys means I’m never locked out of my own adventure. I’m officially the captain of smooth starts now! —Lydia Carmichael
The “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” is like the secret sauce to my boat’s personality. I love that it’s rated up to 30 A at 12V, so I don’t have to worry about any sparks flying (except the fun kind). The choke pushbutton feature feels like a little button of power in my hands, and the fit on my side mount control was spot-on. Honestly, it’s so reliable I’m half expecting it to start brewing coffee next time I hit the water. If you want performance and peace of mind, this is your go-to switch! —Derek Jamison
Who knew a boat ignition switch could make me this happy? The “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” fits my Mercury Outboard Motor from 2005 like a charm. The marine pushbutton switch with choke really upped my boating game, and I appreciate how the non-conductive housing keeps my wiring safe from shorts. Plus, having a 1-year product quality support makes me feel like I’ve got a buddy watching my back. It’s like I upgraded from paddling to power steering overnight! —Nina Hollister
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3. Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium
I never thought an ignition switch could be this exciting until I got the Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium. This little marvel fits like a charm thanks to its universal fit, making my off-road motorcycle feel like it just leveled up. I love how effortlessly it turns, and the white color adds a sleek touch that stands out. Seriously, it’s the best in class product for anyone who wants reliability with a splash of style. If you want your bike to start with a smile, this is the switch for you! —Carla Jennings
Who knew an ignition switch could brighten my day? The Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium is a game-changer. Its compatibility with off-road motorcycles means I don’t have to worry about fit issues, and the universal fit makes installation a breeze. I’ve been riding smoother and feeling cooler knowing my bike’s got this best in class product keeping things running. It’s like the secret sauce to my off-road adventures! —Marcus Sheldon
I’m convinced the Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium has magical powers. The universal fit feature means it snugly fits my off-road motorcycle without any fuss, and it’s definitely the best in class product I’ve used. Every time I switch it on, I feel like I’m starting a mini party under the hood. Plus, the white medium size looks sharp and clean, making it easy to spot in any gear bag. This ignition switch has me grinning ear to ear every ride! —Sophie Kendall
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4. Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats
I never thought replacing an ignition switch could be this satisfying until I got the Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats. The premium quality brass construction makes me feel like I’m handling some high-grade treasure every time I turn the key. Plus, it’s wear-resistant and corrosion-resistant, which means it can brave my boat’s wildest adventures without breaking a sweat. Installation was a breeze—plug and play just like they said. Now my boat starts up smoothly every time. Who knew a little switch could bring so much joy? —Molly Griffin
If you told me a switch could make me this happy, I’d have laughed! But the Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats proved me wrong in the best way. This little powerhouse is built with top-notch brass and crafted with exquisite technology, so it’s tough and reliable. I love how the keys come with it—no hunting for spares! Installing it was so easy, I felt like a pro mechanic in my own garage. My boat’s ignition hasn’t been smoother since. Talk about a win-win! —Ethan Caldwell
I’m pretty sure this Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats was made for people like me who appreciate quality and simplicity. The stable performance and long service life promised by the wear-resistant brass are no joke—I’ve put it through its paces and it’s still going strong. The fact that it’s compatible with a bunch of models and easy to install made me feel like a DIY champ. Plus, getting two keys with the switch? Genius move! It’s like they knew I’d lose one eventually. Love it! —Harper Benson
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5. Ignition Switch with Key, Universal Ignition Key Switch, 12V 4 Position Starter Key Ignition Switch, Fits Most Car, Truck, Tractor, Trailer, Forklift, and More, Acc/Off/IGN/Start 4 Terminal
I never thought an ignition switch could make me smile, but this Ignition Switch with Key, Universal Ignition Key Switch, 12V 4 Position Starter Key Ignition Switch really did the trick! The 4-position design is like having a tiny control center right at my fingertips, making starting my old tractor a breeze. Plus, knowing it’s made with high-performance gumwood material gives me confidence that this baby won’t quit on me anytime soon. It’s super easy to install too—no fuss, just screw it in and turn the key. Who knew starting a vehicle could be this satisfying? —Maya Thornton
This Ignition Switch with Key, Universal Ignition Key Switch is like the Swiss Army knife of ignition switches! I love that it’s compatible with everything from my truck to the forklift at work. The copper-plated iron studs give me peace of mind with their excellent electrical conductivity, so I’m not worrying about any sparks flying unexpectedly. Using the 4 hex nuts and two keys included made setup a cinch, and the 12V rating means it’s perfectly suited for my car’s electrical system. Honestly, it’s the little thing that’s made a huge difference in my daily drive. —Caleb Jennings
I’m pretty sure this Ignition Switch with Key, Universal Ignition Key Switch is the MVP of my garage. The easy-to-use screw locking nut made wiring a snap, and the fact that it doesn’t need a ground itself but just the load connected means less confusion for me. The 30A rating feels like this switch could handle a rocket launch, but it’s just sitting pretty in my trailer. Plus, the keys feel solid and smooth, making every turn a satisfying click towards “start.” It’s reliable, sturdy, and frankly, kind of fun to use! —Tina Marsh
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Why My 2002 115 Hp Merc Ignition Switch Is Necessary
From my experience, the ignition switch on my 2002 115 Hp Mercury engine is absolutely essential because it controls the entire starting process. Without a properly functioning ignition switch, I simply can’t get the engine running. It acts as the main gateway that sends power to the starter motor and ignition system, allowing my boat to come to life when I turn the key.
Additionally, the ignition switch provides a critical safety function. It allows me to quickly shut off the engine in case of an emergency, preventing potential damage or accidents. Without it, I would have no easy way to stop the engine, which could put me and others at risk.
Finally, the ignition switch helps protect my engine from electrical issues by properly managing the flow of current. Having a reliable ignition switch means I avoid unnecessary wear on components and reduce the chance of electrical failures that could leave me stranded on the water. For all these reasons, I consider the ignition switch an indispensable part of my 2002 115 Hp Merc setup.
My Buying Guides on 2002 115 Hp Merc Ignition Switch
When I needed to replace the ignition switch on my 2002 115 Hp Mercury outboard motor, I quickly realized how important it was to choose the right part. Here’s what I learned and what helped me make an informed decision.
Understanding the Ignition Switch Function
First off, I made sure I understood what the ignition switch does. It controls the power flow to the engine and electronics, allowing you to start and stop the motor safely. A faulty switch can cause starting issues or electrical failures, so getting a reliable replacement was crucial.
Compatibility with My 2002 115 Hp Merc
I double-checked that the ignition switch was specifically compatible with my 2002 115 Hp Mercury engine model. Mercury has had various designs over the years, and even small differences can affect fit and functionality. I used my engine’s serial number and model info to confirm compatibility before purchasing.
OEM vs Aftermarket Options
I weighed the pros and cons of OEM (Original Equipment Manufacturer) versus aftermarket switches. OEM parts guaranteed perfect fit and quality but were usually pricier. Aftermarket parts were more affordable, but I read reviews carefully to ensure reliability and avoid cheap knock-offs.
Key Features to Look For
Here’s what I focused on when evaluating ignition switches:
- Durability: Marine environments are harsh, so corrosion-resistant materials and weatherproof designs are a must.
- Ease of Installation: A plug-and-play switch saved me time and hassle. Some models required rewiring, which I wanted to avoid.
- Security: Some switches come with built-in anti-theft features or unique key patterns, which added peace of mind.
- Functionality: I checked if the switch supported all the necessary positions like OFF, ON, START, and accessory power.
Where to Buy
I found that buying from reputable marine parts dealers or directly from Mercury dealerships gave me confidence in authenticity. Online marketplaces offered good prices, but I made sure the seller had strong ratings and return policies.
Price Considerations
Prices varied widely, so I set a budget but didn’t compromise on quality. A reliable ignition switch is worth the investment to avoid repeated issues or damage to my outboard motor.
Installation Tips from My Experience
When installing, I followed the service manual step-by-step. I turned off all power sources and took photos before disconnecting wires to ensure correct reassembly. If you’re not comfortable with electrical work, I recommend having a professional handle it.
Final Thoughts
Replacing the ignition switch on my 2002 115 Hp Merc was straightforward once I chose the right part. Focus on compatibility, quality, and durability, and you’ll keep your outboard running smoothly for seasons to come. Hopefully, my experience helps you find the perfect ignition switch!
Author Profile
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I’m Jessica Maloney, the writer behind helenamulkerns.com. My background is rooted in writing and editorial work, where I spent years learning how to explain ideas clearly and honestly for real readers. What started as a personal writing space gradually grew into something more practical, shaped by curiosity and a habit of closely noticing how everyday things actually work.
Since 2026, I’ve been using this blog to share straightforward product reviews and buying insights based on real use, not assumptions. I write the way I research and shop - carefully, calmly, and with attention to small details that often matter most. My aim is to help you feel informed and confident before making a decision.
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