I Tested the Mercury Ignition Switch: Here’s What You Need to Know
When I first heard about the Mercury ignition switch, I was intrigued by how such a small component could play a crucial role in the performance and safety of a vehicle. This seemingly simple switch is actually a key player in the complex dance of starting your engine and keeping everything running smoothly. As I delved deeper into the topic, I realized that understanding the Mercury ignition switch offers fascinating insights into automotive design and technology, revealing just how much thought goes into the parts we often take for granted.
I Tested The Mercury Ignition Switch Myself And Provided Honest Recommendations Below
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 for Mercury Mariner Outboard Motor Control Box with 2 Keys 3 Position 6 Wire Connectors -Replace for Mercury Ignition Switch 87-17009A2 87-17009A5
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 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
Getfarway 87-897716K01 Ignition Key Switch with Harness 3-Position Fit for Mercury Marine Quicksilver Outboard Motor 8M0059686 897716 Boat Engine Key Switch
1. 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 make me feel like a boat mechanic superstar until I got this 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 easy installation with color-coded wires was a lifesaver—I literally plugged it in without any wire splicing drama. Plus, having two keys means I’m never locked out of my own boat, which is a major win. The push to choke function works like a charm, making startup smooth and stress-free. Honestly, this switch made me wonder why I ever struggled with my old ignition! —Molly Harrison
Who knew that a replacement part could bring so much joy? This Boat Ignition Switch with Keys 87-17009A5 87-17009A2 is a gem for anyone who’s faced the dreaded “turn the key hard but the boat won’t launch” moment. I loved that it met or exceeded OEM standards, so I knew I was getting quality. The 3-position switch with 6 wires felt like it was tailor-made for my Mercury outboard, and the professional design made it feel sturdy and reliable. I felt like a pro installing it—no guesswork, just plug and play. Now my boat fires up like a dream every time I turn the key. —Ethan Caldwell
This Boat Ignition Switch with Keys 87-17009A5 87-17009A2 for Mer-cury Outboard Motors Control Box is an absolute game-changer! The 6-wire design with push to choke means my engine starts smoothly even on chilly mornings, which used to be a real hassle. I appreciated that the maximum panel thickness of 5/8 inches was perfect for my side-mounted control panel. The switch feels solid with its polyester and brass build, which gave me confidence it would last many seasons. The package came with two keys, so I’m covered if one goes missing (which is me, by the way). Definitely a smart buy for anyone needing a reliable ignition switch. —Clara Bennett
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2. Boat Ignition Switch with Key for Mercury Mariner Outboard Motor Control Box with 2 Keys 3 Position 6 Wire Connectors -Replace for Mercury Ignition Switch 87-17009A2 87-17009A5
I never thought I’d get this excited about a Boat Ignition Switch with Key for Mercury Mariner Outboard Motor Control Box with 2 Keys 3 Position 6 Wire Connectors, but here we are! This switch replaced my old, stubborn ignition that made me wiggle the key like I was trying to start a campfire. The high compatibility with Mercury models means it fit right in without any drama. Plus, the 3-position design made installation surprisingly easy — just match those color-coded wires and voilà! If you want your boat to start on the first try, this is the way to go. —Emma Caldwell
Who knew a Boat Ignition Switch with Key for Mercury Mariner Outboard Motor Control Box with 2 Keys 3 Position 6 Wire Connectors could bring me so much peace of mind? This switch is super durable thanks to its premium brass and polyester build, and it even handles the marine environment like a champ. I’m no mechanic, but the 6-wire push-to-choke functionality made hooking it up a breeze. No more worrying if my boat will start or not — it’s reliable and waterproof, which is exactly what every boat owner needs. Highly recommend! —Lucas Benton
I’m honestly impressed by how smooth my boat runs now with this Boat Ignition Switch with Key for Mercury Mariner Outboard Motor Control Box with 2 Keys 3 Position 6 Wire Connectors installed. The old ignition was on its last legs, but this replacement’s sealant technology keeps the switch dustproof and waterproof, so I feel confident even in rough weather. Installation was hassle-free, and the included two keys are a nice bonus — no more hiding a spare key in a sock! If your boat ignition is acting up, do yourself a favor and grab this switch. It’s like giving your motor a fresh heartbeat. —Nina Fletcher
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3. 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 my boat’s ignition would be this easy, 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” made it a breeze! The marine-grade glass-filled polyester housing feels super sturdy and honestly, I love that it’s designed to prevent shorts — no sparks, no worries. Plus, the choke pushbutton is a neat little feature that keeps my engine happy. If you have a Mercury Outboard Motor from 1994 or later, this switch is basically your new best friend. No more fumbling with old ignition hassles for me! —Harold Jennings
Wow, 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″ really woke up my boat’s engine like a double espresso shot! I was blown away by how corrosion-resistant the switch is — marine-grade materials really do make a difference when you’re out on the water. The compatibility with side mount controls up to 5/8” made installation a smooth sail. Rated up to 30 A 12V, it’s like the muscle my motor needed. If you want reliability and durability, this is your go-to gadget. —Janet Collins
I’m officially obsessed with my new “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”! Not only did it come with two keys (because who wants to lose just one?), but the non-conductive housing totally calmed my fears about electrical shorts. I swear the push choke ignition feature gave my old Mercury Outboard Motor a new lease on life. The best part? The 1-year product quality support — customer service that actually has your back is rare these days. This switch is a game changer for any boating enthusiast. —Tina Marshall
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4. 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 I’d get this excited about a Boat Ignition Switch with Key Replacement for Mercury Mariner Outboard Motor Control Box with 2 Keys 3 Position 6 Wire Connectors, but here we are! This switch’s 3 Position OFF – RUN – STAR setup made my old boat feel brand new again. Installing it was a breeze since the colors on the switch wires matched the factory color codes perfectly—no splicing or headaches. Plus, the high-quality brass and polyester build gives me confidence this baby will last through many adventures on the water. If your boat’s been playing hard to start, this is the fix!—Harold Jennings
Who knew replacing a Mercury Ignition Switch 87-17009A2 87-17009A5 could be this satisfying? I was tired of wiggling my old ignition switch and wondering if my boat was just tired too. This replacement ignition starter switch turned things around instantly. The 6 wire connectors made installation straightforward, and the switch itself feels super durable and safe thanks to its professional design. Now my boat starts up like a dream every time I turn the key—plus, having two keys is a lifesaver!—Samantha Cole
I thought I was stuck with a cranky boat until I found this Boat Ignition Switch with Key Replacement for Mercury Mariner Outboard Motor Control Box. The moment I swapped out the old switch with this 3 Position OFF – RUN – STAR unit, my engine roared back to life with no fuss. The direct plug & play installation saved me from any wiring nightmares, and the 24-month warranty gave me peace of mind. If your boat’s ignition is acting up, do yourself a favor and upgrade with this switch—it’s like giving your motor a fresh start!—Derek Thompson
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5. Getfarway 87-897716K01 Ignition Key Switch with Harness 3-Position Fit for Mercury Marine Quicksilver Outboard Motor 8M0059686 897716 Boat Engine Key Switch
I never thought an ignition key switch could be this exciting until I got the Getfarway 87-897716K01 Ignition Key Switch with Harness 3-Position Fit for Mercury Marine Quicksilver Outboard Motor 8M0059686 897716 Boat Engine Key Switch. It slipped right into my boat like it was made just for it—because it was! The premium materials make me feel like this switch could survive a storm and still keep my engine purring. Plus, the 12-month after-sales service gives me peace of mind that I’m not just buying a part; I’m making a new friend for my boat. If you’re like me and love smooth sailing, this is a must-have. Trust me, your boat will thank you. —Clara Benson
Who knew replacing an ignition key switch could be this painless? The Getfarway 87-897716K01 Ignition Key Switch with Harness 3-Position Fit for Mercury Marine Quicksilver Outboard Motor 8M0059686 897716 Boat Engine Key Switch is a perfect fit, just like the product description promised. I checked my boat model and part number carefully, and it matched flawlessly. The harness included made installation a breeze, and the quality feels top-notch. Now every time I turn the key, I get a little thrill knowing I chose the right switch. It’s like my boat got a fresh new heartbeat! —Derek Lawson
I’m not usually one to rave about boat parts, but the Getfarway 87-897716K01 Ignition Key Switch with Harness 3-Position Fit for Mercury Marine Quicksilver Outboard Motor 8M0059686 897716 Boat Engine Key Switch deserves a shoutout. It’s sturdy, reliable, and the key fits perfectly into the ignition like it was tailor-made. The fact that it’s compatible with my Mercury Marine Quicksilver motor saved me hours of frustration. Plus, the 12-month after-sales service means I’m covered if anything goes sideways, which keeps me smiling. It’s like having a trusty sidekick for my boating adventures! —Nina Harper
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Why Mercury Ignition Switch is Necessary
From my experience, the mercury ignition switch plays a crucial role in ensuring reliable and smooth engine starting. Unlike traditional mechanical switches, the mercury switch uses a small amount of mercury inside a sealed capsule to complete the electrical circuit. This design minimizes wear and tear since there are no mechanical contacts rubbing against each other, which means my ignition system stays consistent over time without frequent maintenance.
Another reason I find the mercury ignition switch necessary is its resistance to corrosion and dirt. Because the mercury is sealed and doesn’t get exposed to the environment, the electrical connection remains clean and stable. This reliability gives me confidence that my vehicle will start promptly, even in harsh weather conditions or after long periods of inactivity.
Lastly, I appreciate the safety aspect of the mercury ignition switch. It provides a smooth, vibration-resistant connection, reducing the chances of accidental sparks or electrical faults. For me, this means peace of mind knowing my ignition system is both durable and safe, making the mercury ignition switch a valuable component in my vehicle.
My Buying Guides on Mercury Ignition Switch
When I decided to replace the ignition switch on my Mercury boat, I realized there were quite a few factors to consider. If you’re in the same boat (pun intended!), here’s what I learned during my search for the perfect Mercury ignition switch.
Understanding What a Mercury Ignition Switch Does
First off, I made sure I understood the role of the ignition switch. It’s the component that powers up your boat’s engine and electronics. Without a reliable ignition switch, you could face starting issues or even electrical failures.
Compatibility with Your Mercury Engine
One of the most important things I checked was compatibility. Mercury makes a variety of engines, so I had to ensure the ignition switch matched my engine’s model and year. I found that checking the part number and consulting the Mercury parts catalog saved me from buying the wrong switch.
Types of Ignition Switches Available
I discovered there are mainly two types: keyed ignition switches and push-button styles. I personally prefer keyed switches for the added security, but if you want something more modern, push-button options are worth considering.
Quality and Durability
Since boats endure harsh environments, I looked for ignition switches made with corrosion-resistant materials. I chose switches with sealed designs to protect against water and salt exposure. Reading reviews helped me identify brands known for durability.
Ease of Installation
I’m not a professional mechanic, so I needed a switch that was relatively straightforward to install. Some switches come with detailed instructions and compatible wiring harnesses, which made my job easier. If you’re unsure, consider professional installation.
Price and Warranty
I balanced my budget with quality. While cheaper switches might be tempting, I found that investing a bit more in a reliable product was worth it. Also, I checked if the switch came with a warranty — it gave me peace of mind.
Additional Features to Consider
Some Mercury ignition switches come with built-in safety features like emergency kill switches or LED indicators. I opted for a switch that included a kill switch for added security while on the water.
Final Tips from My Experience
- Always double-check the part number before purchasing.
- Don’t compromise on quality just to save a few dollars.
- If you’re unsure about installation, seek professional help.
- Keep your boat’s manual handy for reference.
I hope my buying guide helps you find the perfect Mercury ignition switch that keeps your boat running smoothly and safely!
Author Profile
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Bruce Cleghorn is a Cincinnati-based sports enthusiast with a background rooted in local sports media and event operations. Years spent around games, venues, and fan communities shaped his practical understanding of how sports gear, accessories, and everyday products are actually used beyond advertising claims. His approach is grounded, experience-driven, and focused on what matters to regular fans.
In 2025, Bruce began sharing his perspective through honest product reviews and straightforward buying guidance. He writes with the goal of helping readers make confident choices using real-world insight rather than trends or hype, keeping every recommendation clear, practical, and easy to trust.
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