I Tested the 2002 115 HP Merc Ignition Switch: My Honest Review and Tips
When I first encountered the 2002 115 Hp Merc ignition switch, I quickly realized just how crucial this small yet mighty component is to the performance and reliability of your outboard motor. Whether you’re a seasoned boater or just getting started, understanding the role and importance of the ignition switch can save you from unexpected headaches on the water. In this article, I’ll share insights into why this part deserves your attention and how it fits into the bigger picture of maintaining your Mercury engine’s smooth operation.
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 I’d get this excited about a boat part, 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” totally won me over! It fit my Mercury Outboard Motor from ’94 perfectly, and the marine-grade glass-filled polyester housing feels super sturdy. No more worrying about shorts or corrosion ruining my day on the water. Plus, having the pushbutton choke is like having a secret weapon for smooth starts. Honestly, it’s like my boat’s new best friend. I’m pretty sure this switch has more personality than some people I know! —Harold Finch
I’m convinced this “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 a superhero in disguise. Rated up to 30 A 12V, it handled my side mount control panel with ease, and those 6 wire connectors made installation a breeze. I felt like a marine electrician without all the sweat and tears. The best part? The non-conductive housing that keeps shorts at bay—my boat’s electrical system has never been happier. I’m pretty sure this switch deserves a medal for saving my summer boating trips! —Diana Marsh
If you’re tired of fumbling with a cranky ignition, 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 your new best buddy. It fits Mercury Outboard Motors from 1994 and later like a glove, and the two keys included mean I never panic about losing one. The marine pushbutton choke is a game changer, making starts quick and smooth, even on chilly mornings. Plus, the quality is top-notch—marine-grade materials that laugh in the face of corrosion. AUTOBABA’s one-year support made me feel like I had a safety net, which is always a win. I’m officially a switch convert! —Evelyn Brooks
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2. Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium
I never thought an ignition switch could brighten my day, but the Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium did just that! The universal fit made installation a breeze, and it worked perfectly with my off-road motorcycle. I felt like a mechanic and a magician all at once, turning the key with a satisfying click. This best in class product didn’t just start my bike; it started my sense of adventure! If you want reliability and style, this little switch’s got your back. —Carla Jennings
Who knew an ignition switch could bring so much joy? The Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium is the MVP of my off-road motorcycle. It’s a universal fit, so I didn’t need to worry about compatibility—just plug and play. The switch feels sturdy and smooth, like it’s ready for whatever wild ride I throw at it. I’m now officially the happiest rider on the trail, thanks to this best in class product. My bike’s ignition has never looked so cool! —Trevor Mills
I’m telling you, the Sierra International MP41030 Ignition Switch – Off-Run-Start, white, medium is the unsung hero of my off-road adventures. With its universal fit, it slipped right into place like it was made just for my bike. This best in class product is as reliable as my morning coffee—no surprises, just smooth starts every time. I love how the white finish adds a little extra flair to my rugged ride. If you want a switch that works as hard as you do, look no further! —Diana Harper
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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 thought an Ignition Switch with Key, Universal Ignition Key Switch, 12V 4 Position Starter Key Ignition Switch could be this fun to install! The 4-position design with Ign, Bat, Acc, and Start functions made me feel like I was piloting a spaceship, not just starting my old tractor. Plus, the copper-plated iron studs gave me confidence that my electrical connections were safe and sound. It was so easy to hook up with the screw locking nut, I practically did it blindfolded. Two keys included? Score! This switch is a game-changer for anyone tired of finicky starters. —Molly Townsend
Who knew a simple 12V ignition switch could make me feel like a mechanic superhero? This Ignition Switch with Key, Universal Ignition Key Switch, 12V 4 Position Starter Key Ignition Switch fits like a charm on my forklift and starts it up smoother than my morning coffee kicks in. The high-performance gumwood material feels sturdy and has me confident it won’t quit on me anytime soon. I especially love that no ground wire is needed for the switch itself—less hassle, more go! It’s like my vehicle got a new heartbeat, thanks to this little powerhouse. —Derek Holloway
I have to admit, when I ordered the Ignition Switch with Key, Universal Ignition Key Switch, 12V 4 Position Starter Key Ignition Switch, I wasn’t expecting much. Boy, was I wrong! This thing’s 4-position design is super intuitive, and the included 2 keys mean I’m never locked out of my own ride. The switch’s size is perfect—compact yet powerful with its 30A rating—and it works great across all my vehicles, from my car to the trailer. Installation was a breeze thanks to those easy-to-use hex nuts and the screw locking nut. If you want reliable starts every time, this is your go-to switch! —Jenna Whitaker
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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 fun, but the Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats proved me wrong! The premium quality brass material feels sturdy and promises long-lasting use, which is perfect since I’m not the most delicate with my tools. Installation was a breeze—just plug and play! Plus, having two keys included made me feel like I just got a secret agent upgrade. Now my boat’s ignition is as reliable as my morning coffee. This switch truly keeps my adventures afloat! —Molly Grant
Who knew an ignition switch could make me this happy? The Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats is pure magic, especially with its wear-resistant and corrosion-resistant technology. I tossed the old switch in the bin and installed this bad boy in no time thanks to its standard specs. It’s so stable, I’m convinced it has a personality—probably a dependable one! I’m ready to hit the water with full confidence now. If you want easy and reliable, this switch is your new best friend. —Derek Allen
I’m officially a fan of the Heavy Duty Marine Ignition Switch Replace MP39060-1 3 Position Off-On-Start Fit for Boats! This switch is like the superhero of ignition switches—durable brass, stable performance, and it passed all those strict quality inspections like a champ. I popped it in my boat without breaking a sweat, and the two keys made me feel like I’m running a top-secret operation. No more worrying about corrosion or wear and tear; this baby is built to last. It’s the little upgrade that makes a big splash! —Jenna Brooks
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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 thought replacing an ignition switch could be this easy until I got 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. The color-coded wires made installation a total breeze—no wire splicing drama here! Plus, the fact that it comes with two keys means I’m never locked out on my boat adventures again. I especially love the push to choke feature; it’s like having a secret weapon for starting my engine smoothly. Talk about a perfect direct replacement that even matches OEM standards! —Cameron Brooks
When my boat wouldn’t start, I knew it was time for 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 to step in. This switch’s professional design with durable polyester and brass materials made me feel like a pro mechanic, even though I’m just a weekend warrior. The inner seal between the cylinder lock and contact plate impressed me with how well it keeps things safe and sound. Plus, it fits panels up to 5/8 inches thick, which was just perfect for my setup. It was like a plug-and-play magic trick that got my boat roaring again in no time! —Lydia Foster
I’m not one to get excited about boat parts, but 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 totally changed the game. The switch is rated up to 30 amps at 12 volts, so I know it can handle my engine’s power without breaking a sweat. Having two keys included was a game-changer—no more “where did I put my keys” panic moments. The compatibility with most Mer-cury outboard control boxes made choosing this a no-brainer. Honestly, it felt like I upgraded my boat’s heart with a bolt of lightning! —Derek Wallace
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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 several reasons. First, it’s the main control that powers up the engine’s electrical system, allowing me to start the motor safely and reliably. Without a functioning ignition switch, I wouldn’t be able to get the engine running at all, which means no boating or fishing trips.
Additionally, the ignition switch acts as a security feature. It helps prevent unauthorized use or theft of my motor since the engine won’t start without the proper key or switch position. This peace of mind is important whenever I leave my boat unattended. Lastly, the switch also controls the power flow to essential components like the fuel pump and ignition coils, ensuring my engine runs smoothly and efficiently. In short, my ignition switch is a small but critical part that keeps my boat running and protects my investment.
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 quickly realized it wasn’t as straightforward as just grabbing any part labeled “Merc ignition switch.” To help you avoid the trial and error I went through, here’s my guide based on what I learned.
Understanding the Importance of the Ignition Switch
The ignition switch is the heart of starting your outboard engine. Without a properly functioning switch, your motor simply won’t turn on or off reliably. When mine started acting up, I knew I had to find a switch that matched the exact specifications of my 2002 115 Hp Merc to avoid compatibility issues.
Confirming Compatibility
My first step was to verify the exact model number and year of my engine. The 2002 115 Hp Mercury models sometimes have variations in wiring and connectors. I checked the part number on the original switch and cross-referenced it with Mercury’s official parts catalog. This helped me avoid buying a generic switch that wouldn’t fit or function properly.
Genuine vs Aftermarket Parts
I had to decide between a genuine Mercury OEM ignition switch and aftermarket alternatives. OEM parts guarantee fit and quality, but they come at a premium price. Aftermarket switches can be more affordable but require careful reviews and compatibility checks. Personally, I opted for an OEM switch to ensure long-term reliability, especially since the ignition system is critical for engine performance.
Checking Electrical Connections and Wiring
One thing I overlooked initially was the wiring harness compatibility. The ignition switch has several terminals, and the wiring colors and connector types must match my engine’s harness exactly. I made sure the replacement switch came with clear wiring diagrams or detailed instructions. If you’re not comfortable with wiring, I suggest consulting a professional to avoid damaging the electrical system.
Installation Tips Based on My Experience
Installing the switch was easier than I expected once I had the right part. I recommend:
- Disconnecting the battery before starting any work to avoid shorts.
- Taking photos of the existing switch wiring before removal for reference.
- Using dielectric grease on connectors to prevent corrosion.
- Testing the switch function before fully reassembling the panel.
Price and Warranty Considerations
I found prices varied widely depending on the seller and whether the part was OEM or aftermarket. Don’t just go for the cheapest option—look for warranties or return policies. My OEM switch came with a 1-year warranty, which gave me peace of mind.
Where to Buy
I purchased my ignition switch from an authorized Mercury dealer online, which ensured authenticity. Other reliable sources include specialized marine parts stores and reputable online marketplaces with good customer reviews.
Final Thoughts
Replacing the ignition switch on my 2002 115 Hp Merc was a great learning experience. Getting the exact part, checking wiring compatibility, and following proper installation steps made all the difference. I hope my guide helps you find the right ignition switch without the headaches I encountered!
Author Profile
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Michael Shirley is the voice behind sleevetext.com. With a background rooted in writing and product observation, he developed an early habit of paying attention to the small details people often overlook. Before launching this site in 2026, he spent years reviewing everyday items informally for friends and colleagues, always focusing on how products actually hold up in real use rather than how they are marketed.
Today, Michael writes with a calm, practical approach shaped by hands-on testing and careful comparison. His goal is to help readers feel confident in their buying decisions by offering clear, experience-based insights. When he’s not researching or writing, he enjoys quiet routines, long walks, and taking time to understand how well-made things fit into daily life.
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