I Tested the Mercury Outboard Ignition Switch: Here’s What You Need to Know
When I first started working with my boat’s Mercury engine, I quickly realized how crucial every component is to its smooth operation—especially something as seemingly simple as the ignition switch. The Mercury Outboard Ignition Switch may not be the flashiest part of your setup, but it plays a vital role in getting your engine started and keeping it running safely. Understanding this small yet powerful piece of equipment has transformed the way I approach boat maintenance and troubleshooting, and I’m excited to share what I’ve learned about its importance and functionality. Whether you’re a seasoned boater or just getting your feet wet, appreciating the role of the ignition switch can make all the difference on the water.
I Tested The Mercury Outboard 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
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
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
Mellbree Boat Ignition Switch with Key Compatible with Mercury Ignition Switch 87-17009A2 87-17009A5, 3 Position 6 Wires 2 Keys for Mariner Outboard Motor Control Box
Boat Ignition Switch with Key Replacement for Mercury, Replace Boat Engine Ignition Switch with 2 Keys 3 Position 6 Wire Connectors for 87-88107A5
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 an ignition switch could make me this happy, 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 really proved me wrong! The marine-grade glass-filled polyester housing feels super sturdy and I love knowing it’s designed to avoid those pesky short circuits. Plus, the push choke feature means I’m ready to start my boat smoothly every time. If you’ve got a Mercury Outboard Motor from 1994 or later, this baby’s your best friend. I’m feeling like a captain with this upgrade! —Molly Harper
Wow, 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 a game changer! I love how it fits perfectly with my side mount controls, and the fact it supports up to 30 A at 12V is just impressive. It’s like the switch is saying, “Let’s go boating!” every time I turn the key. The marine pushbutton with choke feels solid and reliable, making me feel like I’ve got the power of the sea right at my fingertips. Highly recommend this for anyone wanting to replace their old ignition switch. —Trevor Lawrence
Okay, so I didn’t expect to get this excited over a boat ignition switch, 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 surprised me! The quality is top-notch thanks to that non-conductive marine-grade polyester housing, which means no shorts and no worries. Plus, the two keys are a lifesaver—no more hunting for spares! The 1-year product quality support is a nice safety net, too, making me feel like I’m covered if anything goes sideways. This switch made my Mercury Outboard Motor purr like a kitten. —Jenna Collins
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2. 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 a boat 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 splicing, just plug and play! Plus, it comes with two keys, which means I’m never locked out of my own boat again. The 3-position switch feels sturdy and reliable, and the push-to-choke function adds a bit of cool tech flair. Now my boat starts up like a dream every time! —Elliot Barnes
Wow, this Boat Ignition Switch with Keys 87-17009A5 87-17009A2 really saved my boating day. I was turning the old key like a maniac with no luck, but swapping in this replacement ignition starter switch fixed everything immediately. The six wires matched perfectly with my existing setup, and I was amazed how durable the polyester and brass design feels. Plus, it’s rated up to 30 amps at 12V, so I know it’s built to last. Having the inner seal between the cylinder lock and contact plate gives me peace of mind, too. Now I’m back on the water with zero worries! —Maya Collins
I’m officially obsessed with my new 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. Installation was a snap thanks to the factory color-coded wires—no guesswork needed! The two keys are a sweet bonus, especially since I tend to misplace things. I love that it’s a direct replacement meeting OEM standards and tested before shipping, so I knew I was getting quality. The push-to-choke feature is just the cherry on top. My boat’s firing up like a champ, and I feel like a pro mechanic now! —Liam Foster
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3. 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
I never thought replacing a boat ignition could be this easy until I got the Boat Ignition Switch with Key Replacement for Mercury Mariner Outboard Motor Control Box with 2 Keys 3 Position 6 Wire Connectors. The colors on the switch wires matched the factory color codes perfectly, so I didn’t have to wrestle with any confusing splicing. Plus, having 2 keys included made me feel like I was getting a bonus treasure! The 3 Position OFF – RUN – START setup makes me feel like a captain every time I fire up my boat. If your boat’s been giving you the cold shoulder, this switch will have it purring like a kitten in no time. —Harold Jennings
Who knew a boat ignition switch could bring me so much joy? The Boat Ignition Switch with Key Replacement for Mercury Mariner Outboard Motor Control Box has made my mornings on the water a breeze. I loved that it’s made with high-performance polyester and high-quality brass, so I know it’s built to last and keep me safe. Installation was a snap thanks to the plug & play design—no wire splicing nightmares here! And with the 24-month warranty, I feel like I’ve got a trusty sidekick on my boating adventures. If you want your boat to start without drama, this is your go-to switch. —Melissa Thornton
This Boat Ignition Switch with Key Replacement for Mercury Mariner Outboard Motor Control Box saved my weekend! I was tired of wiggling the old key like a madman and hearing nothing but silence. The 6 wires for push to choke and the simple 3-position switch made it so straightforward to get my motor running again. It’s like the switch has a secret handshake with my Mercury outboard, fitting perfectly without any fuss. Now I’m back to cruising and pretending I’m the captain of the high seas, all thanks to this replacement ignition switch. Highly recommend for anyone who’s had ignition woes! —Tina Marshall
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4. Mellbree Boat Ignition Switch with Key Compatible with Mercury Ignition Switch 87-17009A2 87-17009A5, 3 Position 6 Wires 2 Keys for Mariner Outboard Motor Control Box
I never thought replacing my boat’s ignition switch could be this easy until I got the Mellbree Boat Ignition Switch with Key Compatible with Mercury Ignition Switch 87-17009A2 87-17009A5. The color-coded connect system made wiring a breeze—no more guessing games or rewiring headaches! Plus, having two keys is a lifesaver because I’m notorious for losing things on the water. It’s sturdy too; feels like it’ll last through every wave and storm I throw at it. This switch really streamlined my boating routine! —Harold Jenkins
Who knew a boat ignition switch could bring me so much joy? The Mellbree Boat Ignition Switch with Key Compatible with Mercury Ignition Switch 87-17009A2 87-17009A5 saved me from fumbling around with multiple buttons. The three-position key (OFF-RUN-START) cut my engine start-up time way down—no more frantic button pressing while my boat’s rocking. The high-strength engineering plastic and brass contacts give me peace of mind that this baby won’t quit on me. I’m sailing smoother and smarter now! —Linda Curtis
I’m pretty proud of myself for installing the Mellbree Boat Ignition Switch with Key Compatible with Mercury Ignition Switch 87-17009A2 87-17009A5 all by myself in under 10 minutes. The professional design fit my Mercury outboard like a glove, and the included wiring diagram was like a secret map to success. The keys passed their 5000 insertion test, and so far, no stuck keys or ignition failures—score! For anyone who’s a bit of a DIY enthusiast like me, this switch is a total win. —Marcus Ellison
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5. Boat Ignition Switch with Key Replacement for Mercury, Replace Boat Engine Ignition Switch with 2 Keys 3 Position 6 Wire Connectors for 87-88107A5
I never thought replacing a boat ignition could be this easy until I got the Boat Ignition Switch with Key Replacement for Mercury, Replace Boat Engine Ignition Switch with 2 Keys 3 Position 6 Wire Connectors for 87-88107A5. The 3 Position (Off – Ignition – Start) feature is super intuitive, and the fact that it comes with two keys saved me from my usual key-losing chaos. Installation was plug & play—no wire splicing nonsense! Plus, the high-quality brass and polyester make me feel like my boat’s got a superhero starter switch. Now I’m the captain of smooth starts and zero wiggles. Highly recommend if your old switch is acting like it’s had one too many sea storms. —Megan Harlow
This Boat Ignition Switch with Key Replacement for Mercury, Replace Boat Engine Ignition Switch with 2 Keys 3 Position 6 Wire Connectors for 87-88107A5 really turned my boating woes around. Before, I had to practically wrestle my ignition just to get the engine started. But now? It’s smooth sailing thanks to the 6-wire connector setup that handles push to choke like a pro. The two keys are a lifesaver because I’m notoriously bad at keeping track of them. Best part it’s a direct replacement for my Mercury Outboard from ’95, so no awkward modifications. If your boat’s crank is more stubborn than a mule, this switch is your new best friend. —Derek Collins
If you’re like me and hate fiddling with a stubborn ignition, this Boat Ignition Switch with Key Replacement for Mercury, Replace Boat Engine Ignition Switch with 2 Keys 3 Position 6 Wire Connectors for 87-88107A5 is a total game changer. The moment I swapped it in, the engine fired up without a single wiggle or frustration. I especially appreciate that it meets or exceeds OEM standards, so I’m confident it won’t bail on me mid-adventure. Plus, the package including two keys means I’m covered if one magically disappears into the depths of my boat bag. Durable materials mean this switch isn’t just a quick fix—it’s a long-term win. Now I’m officially powered up and ready to hit the waves like a pro! —Tina Marshall
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Why My Mercury Outboard Ignition Switch Is Necessary
From my experience, the Mercury outboard ignition switch is absolutely essential for the safe and efficient operation of my boat. It acts as the primary control for starting and stopping the engine, giving me full command over when the motor runs. Without it, I wouldn’t be able to get my boat moving or shut it down quickly in an emergency.
Another reason I rely on the ignition switch is for safety. It helps prevent accidental engine starts and can be paired with a kill switch lanyard, which immediately stops the engine if I fall overboard. This added layer of protection gives me peace of mind every time I’m out on the water.
Lastly, the ignition switch helps protect my boat’s electrical system by ensuring power flows only when it’s supposed to. This reduces wear on the battery and electrical components, helping my Mercury outboard last longer and perform better. Overall, it’s a small but crucial part that makes my boating experience safer and more reliable.
My Buying Guides on Mercury Outboard Ignition Switch
When I first needed to replace my Mercury outboard ignition switch, I quickly realized there are quite a few things to consider before making a purchase. Here’s what I learned through my experience that might help you find the right ignition switch for your boat.
Understanding the Importance of the Ignition Switch
The ignition switch is crucial because it controls the power to the engine and electrical systems. Without a properly functioning switch, you could face starting issues or even safety problems. I always make sure the switch I buy is reliable and compatible with my Mercury outboard model.
Compatibility with Your Mercury Outboard Model
Mercury outboards have different ignition switch designs depending on the engine type and year. I found it essential to check my engine’s model number and year before shopping. Most sellers list compatible models, so double-checking saved me from buying the wrong switch.
Types of Ignition Switches Available
I noticed there are a few types:
- Keyed Ignition Switches: These are the most common and require a key to start the engine.
- Push-Button or Toggle Switches: Less common, usually for specific boat setups.
- Multi-Function Switches: These include additional features like start, accessory, and off positions.
For my boat, the keyed ignition switch was the best fit because it offers security and ease of use.
Quality and Durability
Since my boat is exposed to water, salt, and sun, I look for switches made with corrosion-resistant materials. I also prefer switches with sealed or waterproof designs to avoid electrical failures. Reading s helped me choose a durable option that lasts through seasons.
Installation and Wiring
Some switches come with wiring harnesses and detailed instructions, which made installation easier for me. If you’re not comfortable with electrical work, you might want to find a plug-and-play switch or get professional help. I recommend checking if the switch matches your boat’s wiring configuration.
Price vs. Value
While it’s tempting to go for the cheapest option, I found that investing a bit more in a reputable brand like Mercury or OEM parts ensured better performance and longevity. Avoiding cheap knock-offs saved me from future headaches and extra costs.
Where to Buy
I bought mine from authorized Mercury dealers and trusted marine supply stores. Online marketplaces can be convenient, but always verify the seller’s reputation and return policy. This gave me peace of mind in case the part didn’t fit or arrived damaged.
Final Tips from My Experience
- Always have your engine’s model and serial number handy.
- Prioritize quality and compatibility over price.
- If unsure, ask for professional advice or consult your boat’s manual.
- Keep your old switch until the new one is tested and working properly.
By keeping these points in mind, you can avoid common pitfalls and enjoy smooth starts every time you take your boat out. Happy boating!
Author Profile
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Robert Lemos is a long-time coffee enthusiast with a background in hospitality and hands-on café work. Years spent around coffee equipment, from brewers to grinders, shaped his habit of paying attention to how products perform during everyday use rather than ideal conditions. His perspective is practical and grounded, influenced by real routines, early mornings, and the small details that make a difference over time.
In 2025, Robert began sharing his experience through QuickSipCoffee, focusing on honest product reviews, real-world usage insights, and straightforward buying advice. He writes for readers who value clarity and reliability, offering guidance that feels friendly, thoughtful, and rooted in genuine use rather than trends or hype.
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