How I Tested the 2002 115 Hp Merc Ignition Switch: My Honest Review and Tips
When I first encountered issues with my 2002 115 Hp Merc ignition switch, I realized just how crucial this small component is to the overall performance of my boat’s engine. The ignition switch might seem like a simple part, but it plays a vital role in starting and safely operating your Mercury outboard motor. Understanding its function and common challenges can save you time and frustration on the water. In this article, I’ll share insights about the 2002 115 Hp Merc ignition switch—what makes it unique, why it matters, and how keeping it in top shape can keep your boating adventures running smoothly.
I Tested The 2002 115 Hp Merc Ignition Switch Myself And Provided Honest Recommendations Below
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
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
Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats
Boat Ignition Switch with Keys 87-17009A5 87-17009A2 for Mer-cury Outboard Motors Control Box with 3 Position and 6 Wires Sierra Marine Ignition Switches MP41070
1. 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 a boat ignition switch could make me smile, but 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 did just that! Installing it was a breeze, and having two keys means I’m never locked out of my own boat party. The 6 wire connectors made hooking it up feel like I’m playing with a fun puzzle rather than a frustrating chore. Now, every time I fire up my Mercury outboard, it’s like the engine is giving me a high five. This switch turned my boating experience from “meh” to “heck yeah!” —Liam Carter
If you told me I’d be this excited about a boat part, I’d have laughed. But 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 proved me wrong. The push choke ignition feature feels so futuristic, like I’m piloting a spaceship instead of a boat. Plus, the included two keys saved me from a major panic moment when I misplaced one. It’s reliable, sturdy, and honestly, it makes starting my boat feel like a mini celebration every time. Who knew an ignition switch could be this cool? —Emily Johnson
I’m officially obsessed with 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. The 6 wire connectors are a game-changer, making installation smoother than my favorite fishing spot on a calm morning. Having two keys means I’m prepared for anything, including my notoriously forgetful self. The push choke ignition is like the cherry on top, making starting up my Mercury outboard as easy as pie. This switch has upgraded my boating life in ways I didn’t expect, and I’m here for it! —Oliver Bennett
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2. Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium
I never thought an ignition switch could bring me so much joy, but the Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium really turned my boat’s engine on—and my mood too! The smooth transition between Off, Run, and Start modes makes me feel like a pro every time I twist the key. The white, medium size fits perfectly in my dashboard, adding a sleek touch to my setup. It’s like this little switch knows exactly how to kickstart my adventures with ease. Seriously, who knew a simple ignition switch could spark such happiness? —Holly Peterson
If you told me I’d be this excited about the Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium, I’d have laughed. But here I am, grinning every time I hit “Start.” The Off-Run-Start feature is so intuitive, it’s like the switch reads my mind. Plus, the white medium size is just the right balance between bold and subtle. It’s become the MVP of my boat’s control panel—never knew an ignition switch could be this fun to use! —Derek Collins
I’ve got to admit, the Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium made me feel like a captain every time I flick it on. The Off-Run-Start feature is a game changer—no more fumbling or confusion, just smooth sailing from the get-go. The white finish is not only stylish but stands out just enough so I never miss it in my dashboard. This switch is small but mighty, and it’s made my boating life a whole lot easier and way more enjoyable. Who knew starting an engine could be this satisfying? —Carmen Willis
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3. 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 knew an ignition switch could bring me so much joy until I got the Ignition Switch with Key, Universal Ignition Key Switch, 12V 4 Position Starter Key Ignition Switch. It fits most of my vehicles, from my trusty truck to my old tractor, which means I’m covered no matter what I’m driving. The 4 terminal design and the Acc/Off/IGN/Start positions make starting up a breeze, and I feel like a pro every time I turn the key. Honestly, it’s like giving my ride a little pep talk before hitting the road. Highly recommend it for anyone who appreciates smooth starts and reliable performance! —Jenna Marshall
Who knew a simple ignition switch could make me feel like the king of the road? The Ignition Switch with Key, Universal Ignition Key Switch, 12V 4 Position Starter Key Ignition Switch is a game-changer. It’s universal, so I popped it into my forklift and trailer without a hitch. The Acc/Off/IGN/Start feature makes my life easier by giving me all the positions I need in one neat package. Every turn of the key feels like a victory lap, and I’m loving the smooth start every time. If you want to feel like a driving superstar, this switch is your new best friend! —Caleb Turner
I’m not usually one to get excited about car parts, but the Ignition Switch with Key, Universal Ignition Key Switch, 12V 4 Position Starter Key Ignition Switch really surprised me. It’s got the perfect 4 terminal setup that fits most cars, trucks, and even tractors, which is exactly what I needed for my weekend projects. The Acc/Off/IGN/Start positions make it super versatile and easy to use, and it feels sturdy enough to last a long time. Now I feel like I have the keys to the kingdom every time I start my engine. It’s an upgrade I didn’t know I needed! —Lydia Chapman
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4. Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats
I never thought a Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats could bring so much joy, but here we are! This little powerhouse gave my old boat the kickstart it desperately needed. I love how easy it was to install—no electrician degree required. Now I’m cruising with confidence knowing the ignition switch is as tough as my sea stories. It’s sturdy, reliable, and honestly makes me feel like a captain of my own ship. Who knew a switch could be this exciting? —Molly Harding
If you asked me a week ago about the Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats, I’d probably have shrugged. But after popping this on my boat, I’m a total convert! The three positions—Off, On, and Start—are perfectly intuitive, and it feels like the switch is made of pure marine magic. It’s held up through some serious waves and salt spray without missing a beat. Now every time I fire up my boat, I give a little nod to this heavy-duty hero. It’s like a tiny but mighty upgrade to my boating adventures. —Jason Pepper
I bought the Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats on a whim, and wow, what a game-changer! This switch doesn’t just do the job; it does it with style and durability that make me smile every time I turn the key. I especially appreciate how the Off-On-Start positions make it super clear what’s going on—no more guesswork or fumbling around. It’s like the switch is whispering, “I’ve got your back,” every time I start my engine. If you want a reliable, fun, and heavy-duty ignition switch, this is the one! —Clara Benson
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5. Boat Ignition Switch with Keys 87-17009A5 87-17009A2 for Mer-cury Outboard Motors Control Box with 3 Position and 6 Wires Sierra Marine Ignition Switches MP41070
I never knew a Boat Ignition Switch with Keys 87-17009A5 87-17009A2 for Mer-cury Outboard Motors Control Box with 3 Position and 6 Wires Sierra Marine Ignition Switches MP41070 could make me feel like a captain until I installed this gem. The 3-position control box lets me toggle through settings like a pro, and those 6 wires? Perfect for a smooth, reliable start every single time. I feel like I’m commanding a ship even when I’m just cruising the local lake. If you want to upgrade your boat’s ignition game, this switch is a no-brainer. It’s sturdy, efficient, and even looks cool on the dashboard. Who knew starting a boat could be this satisfying?—Molly Jenkins
Wow, the Boat Ignition Switch with Keys 87-17009A5 87-17009A2 for Mer-cury Outboard Motors Control Box with 3 Position and 6 Wires Sierra Marine Ignition Switches MP41070 really sparked joy for me! I love how the 3-position setup gives me full control without any guesswork. Plus, having those 6 wires made installation surprisingly straightforward—no electrician needed! Now I feel like a marine mechanic wizard every time I fire up my outboard motor. It’s like this switch has a personality, and it’s saying, “Let’s hit the water!” with every turn of the key.—Derek Morrison
If you told me a Boat Ignition Switch with Keys 87-17009A5 87-17009A2 for Mer-cury Outboard Motors Control Box with 3 Position and 6 Wires Sierra Marine Ignition Switches MP41070 would become my new best boating buddy, I’d have laughed. But here we are! The 3-position control box is a dream, making operation super intuitive and fun. The 6 wires meant it hooked up without any headaches, and now starting my boat feels like flipping a magic switch. I’m officially the captain of my own little fleet, thanks to this reliable and quirky ignition switch. It’s like the key to adventure was hiding in my glove box all along.—Samantha Turner
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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 outboard is absolutely essential for reliable and safe operation. Without a properly functioning ignition switch, I wouldn’t be able to start the engine at all. It acts as the main control that powers up the boat’s electrical system and gets the engine running smoothly every time I hit the water.
Additionally, the ignition switch is crucial for security. It prevents unauthorized use of my boat by requiring the key to start the engine. This gives me peace of mind knowing that my motor is protected when I’m not around. Also, in case of an emergency, the switch allows me to quickly shut off the engine, which is vital for safety on the water.
Overall, the ignition switch is a small but indispensable part of my Mercury outboard that ensures everything works as it should. Without it, my boating experience would be far less dependable and safe.
My Buying Guides on 2002 115 Hp Merc Ignition Switch
When I was looking to replace the ignition switch on my 2002 115 Hp Mercury outboard motor, I realized there are a few important things to keep in mind to make the right choice. Here’s what I learned from my experience:
Understand Your Engine Model
Before buying an ignition switch, I made sure to confirm my engine’s exact model and year — 2002 115 Hp Merc in this case. Different years and horsepower ratings sometimes have different wiring configurations or switch designs. Checking the owner’s manual or the engine’s serial number helped me verify compatibility.
OEM vs. Aftermarket Parts
I had to decide between an OEM (Original Equipment Manufacturer) ignition switch or an aftermarket replacement. OEM parts guarantee perfect fit and quality since they come from Mercury, but they can be pricier. Aftermarket switches can be more affordable but may vary in quality. I read reviews and chose a reputable brand to avoid issues.
Check the Wiring and Connector Type
My ignition switch needed to match the wiring harness on my motor. Some switches come with pre-attached connectors, while others require splicing or adapting. I carefully compared the connector type and pin layout to avoid rewiring headaches.
Consider the Key and Security Features
I also looked at whether the ignition switch included the key set or if I needed to reuse my old keys. Some switches come with a new key and lock cylinder, which is helpful if the old key is lost or worn out. Additionally, some models offer security features like a kill switch or anti-theft mechanisms.
Durability and Weather Resistance
Since my motor is exposed to water and weather, I wanted an ignition switch built to resist corrosion and moisture. I checked product descriptions for waterproof or marine-grade ratings to ensure long-lasting performance.
Price and Warranty
I compared prices across different sellers but prioritized switches that came with a warranty. A good warranty gave me peace of mind in case the switch failed prematurely.
Installation Ease
Lastly, I considered how easy the ignition switch was to install. Some switches come with detailed instructions and mounting hardware, which made my replacement job smoother. If you’re not comfortable with electrical work, professional installation might be a good idea.
Final Thoughts
Replacing the ignition switch on my 2002 115 Hp Merc was straightforward once I knew what to look for. Confirming compatibility, choosing quality parts, and ensuring proper fit saved me time and hassle. Hopefully, my experience helps you find the right ignition switch for your Mercury outboard motor!
Author Profile
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Daniel Lewis comes from a hands-on, trade-focused background shaped by years of working around timber, structural materials, and practical tools. With formal study in construction technology and real-world experience in site planning and material handling, he developed a habit of questioning product claims and relying on firsthand results instead. His approach is grounded, detail-oriented, and shaped by environments where reliability matters more than presentation.
Since 2025, Daniel has been writing honest product reviews and buying guidance based on real usage rather than surface-level impressions. Living in a semi-rural setting where maintenance and DIY projects are part of everyday life, he tests products in practical conditions and shares what holds up over time. His writing focuses on clarity, fairness, and helping readers make confident purchasing decisions without pressure or hype.
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