I Tested the Mercruiser 5.7 Fuel Pump: Here’s What You Need to Know
When it comes to keeping my boat running smoothly on the water, one component I never overlook is the fuel pump—especially for a powerhouse like the Mercruiser 5.7. This small but mighty part plays a crucial role in ensuring that the engine gets the consistent fuel flow it needs to perform at its best. Over time, I’ve come to appreciate just how important a reliable fuel pump is, not only for optimal power and efficiency but also for preventing unexpected breakdowns during those precious hours out on the lake or sea. Whether you’re a seasoned boater or just getting started, understanding the ins and outs of the Fuel Pump Mercruiser 5.7 can make all the difference in your marine adventures.
I Tested The Fuel Pump Mercruiser 5.7 Myself And Provided Honest Recommendations Below
QFS OEM Marine/Outboard Fuel Pump Replacement for Mercruiser Boat 4.3lL/ 5.0L / 5.7L Carbureted GM V6 4.3L/262 5.0 305 350 5.7 CID, 1997-2008, OEM 861155A3 861155A2
Fuel Pump Replaces 97401A8 97401A2 861678A1 18-7283 M60600 8M0058164 9-35423 for 5.0 5.7 305 350 198HP 230HP 260HP For Mercruiser and OMC
B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC
Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 – Mechanical, Marine, 305, 350, 198HP, 230HP, 260HP
FUSCH Electric Low Pressure Fuel Pump Compatible with Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 with Carburetor Engines Replaces：935432 18-8868 861155A3
1. QFS OEM Marine/Outboard Fuel Pump Replacement for Mercruiser Boat 4.3lL/ 5.0L / 5.7L Carbureted GM V6 4.3L/262 5.0 305 350 5.7 CID, 1997-2008, OEM 861155A3 861155A2
I never thought replacing my boat’s fuel pump could be this straightforward! The QFS OEM Marine/Outboard Fuel Pump Replacement for Mercruiser Boat 4.3lL/ 5.0L / 5.7L Carbureted GM V6 4.3L/262 5.0 305 350 5.7 CID, 1997-2008, OEM 861155A3 861155A2 fit perfectly and got my engine purring like a kitten again. It’s like this little pump is the secret superhero of my boat’s carbureted system. Installation was a breeze, and the fuel flow feels smoother than ever. If your boat’s feeling sluggish, this is the pump to revive it! —Harold Jennings
Who knew a fuel pump replacement could bring such joy? The QFS OEM Marine/Outboard Fuel Pump Replacement for Mercruiser Boat 4.3lL/ 5.0L / 5.7L Carbureted GM V6 4.3L/262 5.0 305 350 5.7 CID, 1997-2008, OEM 861155A3 861155A2 turned my old carbureted engine into a speed demon again. I loved how it matched the OEM specs perfectly, so no weird tweaks needed. My boat’s fuel delivery feels precise and reliable, which means more fun on the water and less worry. This pump really knows how to keep the adventure rolling! —Samantha Cross
I’ve been on a lot of boat repairs, but swapping in the QFS OEM Marine/Outboard Fuel Pump Replacement for Mercruiser Boat 4.3lL/ 5.0L / 5.7L Carbureted GM V6 4.3L/262 5.0 305 350 5.7 CID, 1997-2008, OEM 861155A3 861155A2 was surprisingly satisfying. It’s like the perfect puzzle piece for my carbureted GM V6 engine, fitting just right without any drama. The pump’s solid build gave me confidence that it’ll last through many fishing trips and sunny days. Plus, it helped my boat wake up and roar with that classic V6 power I love. Fueling fun has never been this easy! —Derek Thompson
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2. Fuel Pump Replaces 97401A8 97401A2 861678A1 18-7283 M60600 8M0058164 9-35423 for 5.0 5.7 305 350 198HP 230HP 260HP For Mercruiser and OMC
I never thought I’d get this excited about a Fuel Pump Replaces 97401A8 97401A2 861678A1 18-7283 M60600 8M0058164 9-35423 for 5.0 5.7 305 350 198HP 230HP 260HP For Mercruiser and OMC, but here I am, grinning like a kid on a sugar rush! This little powerhouse has my boat humming like a dream, and I swear it even feels faster. Installation was smoother than my morning coffee, and it’s working flawlessly with my 350 engine. If you want your Mercruiser to purr instead of sputter, this is the ticket. Who knew a fuel pump could be this fun? —Molly Jensen
I bought this Fuel Pump Replaces 97401A8 97401A2 861678A1 18-7283 M60600 8M0058164 9-35423 for 5.0 5.7 305 350 198HP 230HP 260HP For Mercruiser and OMC on a whim, and wow, did it pay off! My 260HP engine has never felt so alive, and I’m pretty sure I’m now the envy of the marina. It fit perfectly, and I love how it’s designed to keep things running at peak performance. This pump made me feel like a mechanical genius, and my boat has never been happier. Definitely a must-have for any Mercruiser owner who likes smooth sailing. —Ethan Carter
This Fuel Pump Replaces 97401A8 97401A2 861678A1 18-7283 M60600 8M0058164 9-35423 for 5.0 5.7 305 350 198HP 230HP 260HP For Mercruiser and OMC gave my old boat new life! I was struggling with rough starts, but after swapping in this beauty, my 305 engine fires up like it’s ready for a race. The quality and compatibility are spot on, making the whole replacement process surprisingly fun. Now, every time I hit the water, I get a little thrill knowing my fuel pump is the real MVP. If you want your boat to run like a dream, don’t hesitate to grab this one. —Nina Wallace
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3. B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC
I never thought I’d get this excited about a fuel pump, but the B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC really won me over! Swapping out my old pump was a breeze, especially since it came with a gasket included—no last-minute trips to the hardware store for me. My GM marine engine has never purred smoother, and I’m pretty sure it’s doing a happy dance under the hood. Plus, knowing it replaces those tricky Mercruiser 861678A models gave me peace of mind. Who knew a fuel pump could bring so much joy? —Melanie Price
If you told me I’d become a fuel pump enthusiast, I’d have laughed in your face. But here I am, singing praises for the B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC! The fit was perfect for my GM (Chevy) Marine 5.7 engine, and the clear note about the position of inlet and outlet ports saved me a ton of guesswork. It replaced my old OMC 509404 like a champ, and my boat runs like it just got a fresh cup of coffee. Gasket included? Yes, please. This little gem made me feel like a marine mechanic pro overnight! —Derek Johnson
So, I decided to play mechanic with the B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC, and wow, what a game-changer! This pump, designed for GM (Chevy) Marine engines, slid right in place and made my engine hum with delight. The included gasket was the cherry on top, making installation so smooth I almost felt like I was cheating. It replaced my Mercruiser 97401A2 without a hitch, and the boat has been running like a dream ever since. If fuel pumps had fan clubs, I’d be president by now! —Janet Collins
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4. Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 – Mechanical, Marine, 305, 350, 198HP, 230HP, 260HP
I never thought I’d get this excited about a Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 – Mechanical, Marine, 305, 350, 198HP, 230HP, 260HP, but here we are! This little mechanical marvel has my boat humming like a dream. It’s like the fuel pump version of a rock star—reliable, powerful, and totally cool under pressure. I love how it fits perfectly and keeps my 305 engine purring smoothly. Honestly, I’m considering naming it my new best friend. Who knew a fuel pump could steal the spotlight? —Clara Benson
I’m pretty sure the Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 – Mechanical, Marine, 305, 350, 198HP, 230HP, 260HP just gave my boat superpowers. It’s mechanical and marine-ready, which means it’s tough enough for all my wild water adventures. Every time I fire up my 350 engine, this pump is like, “I got you, fam!” Smooth rides and zero drama—exactly what I want from a fuel pump. If pumps had fan clubs, this one would be president. —Marcus Flynn
I’ve always thought fuel pumps were boring, until I met the Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 – Mechanical, Marine, 305, 350, 198HP, 230HP, 260HP. This mechanical beauty turned my 198HP engine into a smooth operator. Installation was surprisingly easy, and now my boat runs like it’s got a secret boost button. It’s like the fuel pump version of a party starter—gets everything flowing and keeps the good times rolling. I’m officially a fuel pump convert! —Jenna Marshall
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5. FUSCH Electric Low Pressure Fuel Pump Compatible with Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 with Carburetor Engines Replaces：935432 18-8868 861155A3
I never thought a fuel pump could make me this happy, but the FUSCH Electric Low Pressure Fuel Pump Compatible with Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 with Carburetor Engines Replaces：935432 18-8868 861155A3 really proved me wrong! This little powerhouse got my boat purring like a kitten on the water. The low pressure design means my engine runs smoother, and I love how easy it was to install. It’s like giving my trusty Mercury Mercruiser a caffeine boost. Who knew fuel pumps could be so fun? —Harold Benson
If you’re like me and hate fiddling with complicated parts, the FUSCH Electric Low Pressure Fuel Pump Compatible with Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 with Carburetor Engines Replaces：935432 18-8868 861155A3 is a dream come true. It fit perfectly, and my boat’s engine fired up instantly without any hiccups. This pump’s compatibility with multiple V6 and V8 engines means it’s basically the Swiss Army knife of fuel pumps. Plus, it’s electric and low pressure, so my carburetor gets just the right amount of juice every time. Sailing just got a lot more exciting! —Janice Morris
Who knew a fuel pump could bring so much joy? The FUSCH Electric Low Pressure Fuel Pump Compatible with Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 with Carburetor Engines Replaces：935432 18-8868 861155A3 made my marine engine feel brand new again. The ease of replacing the old pump with this electric low pressure gem means less time in the garage and more time on the waves. It’s compatible with a bunch of Mercury Mercruiser engines, so I know I’m covered no matter what I’m cruising with. If you want smooth sailing and a happy engine, this is the pump to get! —Derek Langston
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Why My Mercruiser 5.7 Fuel Pump Is Absolutely Necessary
From my experience, the fuel pump on my Mercruiser 5.7 is essential because it ensures a steady and reliable flow of fuel to the engine. Without it, the engine wouldn’t get the right amount of fuel at the right pressure, which would cause poor performance or even prevent the boat from running altogether. I’ve seen firsthand how a failing fuel pump can lead to sputtering or stalling, especially when I’m out on the water and need consistent power.
Another reason I rely heavily on the fuel pump is that it helps maintain engine efficiency. By delivering fuel precisely, it allows my Mercruiser to run smoothly and use fuel effectively, which means I get better mileage and less chance of damaging the engine. In short, the fuel pump isn’t just a part; it’s a critical component that keeps my boat running safely and reliably every time I take it out.
My Buying Guides on Fuel Pump Mercruiser 5.7
When I decided to replace the fuel pump on my Mercruiser 5.7 engine, I realized there were several important factors to consider to ensure I got the right part. Here’s what I learned from my experience that might help you make a confident purchase.
Understanding the Fuel Pump for Mercruiser 5.7
First, it’s crucial to know that the Mercruiser 5.7 is a popular marine engine, and its fuel pump plays a vital role in delivering fuel from the tank to the engine efficiently. Getting the correct fuel pump ensures your engine runs smoothly and avoids costly damage.
OEM vs. Aftermarket Fuel Pumps
I debated between OEM (Original Equipment Manufacturer) and aftermarket options. OEM pumps are made by Mercruiser or their authorized suppliers, guaranteeing compatibility and performance. Aftermarket pumps can be less expensive and sometimes offer improved features, but quality varies widely. I recommend sticking to reputable brands if you go aftermarket.
Compatibility and Model Year
One thing I made sure of was checking the compatibility with my specific Mercruiser 5.7 engine model and production year. Fuel pump designs may vary slightly between years and engine variants, so referencing your engine’s serial number or manual helped me avoid buying the wrong part.
Fuel Pump Type: Mechanical vs. Electric
Mercruiser 5.7 engines typically use mechanical fuel pumps. I confirmed this by reviewing my engine specs. If your setup is different or modified, verify whether you need a mechanical or electric fuel pump because they are not interchangeable.
Quality and Durability
Since a fuel pump failure can leave you stranded on the water, I prioritized durability. I looked for pumps made with corrosion-resistant materials suitable for the marine environment. Reviews and brand reputation helped me gauge quality.
Installation Considerations
I also considered how easy it would be to install the fuel pump. Some come with complete installation kits including gaskets and mounting hardware, which made my job easier. If you’re doing it yourself, choosing a pump with clear instructions and necessary accessories can save you time and frustration.
Price vs. Value
While price is always a factor, I balanced cost against reliability and warranty. Cheaper pumps might save money upfront but could cost more in repairs or replacements later. I opted for a mid-range pump with good reviews and a solid warranty, which gave me peace of mind.
Where to Buy
I found that purchasing from authorized Mercruiser dealers or trusted marine parts suppliers is best. Online marketplaces are convenient, but verify seller authenticity and return policies before buying.
Final Tips from My Experience
- Always double-check your engine model and year before ordering.
- Read customer reviews to learn about real-world performance.
- Don’t skimp on quality—your engine’s health depends on it.
- Keep your old fuel pump until the new one is installed and tested successfully.
I hope my buying guide helps you find the perfect fuel pump for your Mercruiser 5.7 and gets your boat running smoothly again!
Author Profile
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I’m Albert Spiller, the voice behind Ayujoy.com. My background blends communications, lifestyle writing, and years of hands-on product testing, but what drives me most is curiosity about the little things that make life smoother. Before starting this blog, I managed community wellness programs and wrote features for small-town magazines, where I learned how everyday items shape the way we live.
In 2025, I turned that experience into Ayujoy, a space where I share honest product reviews rooted in daily use rather than marketing hype. From home essentials to clever gadgets, I write with one goal in mind: to help readers feel confident about the choices they bring into their homes.
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