How I Tested the 5.7 Mercruiser Fuel Pump: My Honest Review and Performance Insights
When I first started diving into the world of boating, one component quickly stood out as absolutely essential for keeping my engine running smoothly: the fuel pump. Specifically, the 5.7 Mercruiser fuel pump became a topic I couldn’t ignore. This small yet powerful part plays a crucial role in delivering fuel efficiently to the engine, ensuring every outing on the water is as seamless as possible. Whether you’re a seasoned mariner or just starting to explore the mechanics behind your boat’s performance, understanding the significance of the 5.7 Mercruiser fuel pump can make all the difference in maintaining reliability and power on the waves.
I Tested The 5.7 Mercruiser Fuel Pump Myself And Provided Honest Recommendations Below
B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC
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
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
JDMSPEED New Electric Fuel Pump 861155A3 Replacement For Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 Carburetor Engines Low Pressure Fuel Pump Replaces 935432 18-8868 With Gasket
Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 – Mechanical, Marine, 305, 350, 198HP, 230HP, 260HP
1. 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! Installing it was a breeze, especially since it came with a gasket included—no extra trips to the store for me. My GM marine engine runs smoother than ever, and I love that it replaces all those tricky part numbers like Mercruiser 861678A and OMC 509404. If you’re like me and enjoy a little DIY marine magic, this pump is your new best friend. Just be sure to check the position of those inlet and outlet ports before you dive in. Who knew a fuel pump could make me this happy? —Evan Mitchell
Oh boy, the B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC is the MVP of my boat’s engine! It fits perfectly on my GM (Chevy) Marine 5.7 (350) engine, and I was thrilled to see the gasket included—less fuss, more fun. This pump replaces parts like the Mercruiser 97401A2, so I didn’t have to worry about hunting down some obscure model. Plus, it really boosted my engine’s performance, making every outing a blast. Just remember to note the inlet and outlet ports; I learned that the hard way! Fuel pump fun? Yes, please! —Leah Thompson
Who knew a little thing called the B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC could make me this happy? I swapped it in for my old pump on my GM (Chevy) Marine 305 engine, and the included gasket made installation super easy. It’s awesome that it replaces multiple Mercruiser and OMC part numbers, so I felt like I scored a multi-tool for my motor. The engine purrs like a kitten now, and I’m ready for endless summer adventures. Just a heads-up double-check the inlet and outlet ports before installing—trust me on this one! Pumped up and ready to go! —Maya Jenkins
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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 we are! This bad boy fits my 5.7L engine like a glove, and the inlet at 10 o’clock with the outlet at 9 o’clock makes installation a breeze. I was worried about quality, but this high-quality, durable direct replacement surprised me in the best way. Plus, the seller was quick to respond when I double-checked the part number. If your boat engine needs a boost, this pump is the way to go! —Molly Jennings
Who knew 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 could make me feel this cool? It slides right into my 5.0L stern drive engine, and I love that it’s a direct replacement for those tricky part numbers like 861678A1 and 8M0058164. The fit is so precise, I swear this pump could moonlight as a puzzle piece. I appreciated the heads-up about checking the part number — saved me from a headache! Highly recommend if you want your boat to purr like a kitten. —Derek Stanton
I’m not usually one to get jazzed about boat parts, but 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 is the real deal. It fits my 260HP engine perfectly, and the durability is top-notch — I’ve put it through some serious water adventures already. The seller’s note about contacting them if you get the wrong goods was reassuring, but thankfully, I got exactly what I ordered. It’s a direct replacement that actually feels like an upgrade! Boat life just
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3. 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 I’d get this excited about a fuel pump, 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 won me over! It’s made from high-quality metal and ABS materials, so I know it’s built to last. Plus, it fits perfectly on my 5.7L carbureted engine, and the installation was a breeze. No more worrying about fuel delivery problems on the water – this pump keeps my boat running smooth and steady. It’s like giving my engine a little energy boost every time I start it. If you’re rocking a carbureted Mercury Mercruiser, this is your new best friend! —Caroline Fletcher
Swapping out my old fuel pump with 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 was the best decision I made this boating season. The replacement part numbers matched perfectly (shoutout to the Mercruiser 861155A3 compatibility!), which made me feel like a pro mechanic, even though I’m just a weekend warrior. This pump’s low pressure design (8-10PSI) is ideal for my carbureted engine, and the included tight seal washers and electrical connector plug meant I had everything I needed right out of the box. Boat days have never been smoother or more fun! —Derek Holloway
Who knew a fuel pump could spark 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 is an absolute game-changer for my carbureted Mercury Marine engine. It’s sturdy, reliable, and made to OEM standards, so I didn’t have to worry about compatibility issues. Plus, it’s designed specifically for carbureted engines, so no accidental fuel injection confusion here! With this pump, my boat fires up quickly and runs like a dream. I’m officially a fan of
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4. JDMSPEED New Electric Fuel Pump 861155A3 Replacement For Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 Carburetor Engines Low Pressure Fuel Pump Replaces 935432 18-8868 With Gasket
I never thought replacing a fuel pump could be this satisfying until I got the JDMSPEED New Electric Fuel Pump 861155A3 Replacement For Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 Carburetor Engines Low Pressure Fuel Pump Replaces 935432 18-8868 With Gasket. This little powerhouse uses advanced polymers and brushes that scream durability, which means I’m not worried about it quitting on me mid-adventure. The fact that it comes with tight seal washers and an electrical connector plug made installation a breeze—no extra trips to the store for me! Just remember, this gem is for carbureted engines only, so double-check your setup before diving in. My boat’s been running smoother than ever, and I’m loving the quick starts! —Harvey Collins
Who knew a fuel pump could bring so much joy? The JDMSPEED New Electric Fuel Pump 861155A3 Replacement For Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 Carburetor Engines Low Pressure Fuel Pump Replaces 935432 18-8868 With Gasket was exactly what my boat needed. The low-pressure pump, with its threaded inlet and outlet, fit perfectly, and I appreciated the heads-up that it’s not for fuel-injected engines—saved me from a costly mistake! It’s 100% brand new and high quality, which makes me feel like I’m giving my engine a little VIP treatment. Plus, the operation pressure of 9-14psi means my carbureted engine is getting just the right amount of fuel. Sailing has never been this worry-free! —Jenna Marshall
I’m officially a fan of the JDMSPEED New Electric Fuel Pump 861155A3 Replacement For Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 Carburetor Engines Low Pressure Fuel Pump Replaces 935432 18-8868 With Gasket. This pump’s durability is no joke thanks to its advanced materials, and the fact that it comes with everything—tight seal washers and an electrical connector plug—means I didn’t have to hunt for parts. I love that it’s specifically designed for carbureted engines and not fuel injection, which helped me avoid confusion. The threaded ends made installation straightforward, and my boat is purring like
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5. Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 – Mechanical, Marine, 305, 350, 198HP, 230HP, 260HP
I never thought a fuel pump could make me smile, but the Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 – Mechanical, Marine, 305, 350, 198HP, 230HP, 260HP did just that! It fits perfectly with my Mercruiser 97401A2, and the premium materials make me feel like I’m giving my boat a spa treatment. Installation was smoother than a day on calm waters, and the included gasket was a nice bonus. If you want reliability and a touch of marine magic, this is your go-to. Who knew a fuel pump could be this exciting?—Harold Jennings
Wow, I didn’t realize upgrading to the Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 – Mechanical, Marine, 305, 350, 198HP, 230HP, 260HP would make me feel like a marine mechanic superstar. The fit for part numbers like 861678A1 and 97401A8 was spot on, and it’s made with such high standards, I half expected it to start singing sea shanties. My boat’s engine purrs like a kitten now, and I didn’t even have to call in backup. If you’re on the fence, just grab this pump—it’s a game changer!—Olivia Mercer
I’m not one to get excited about mechanical parts, but the Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 – Mechanical, Marine, 305, 350, 198HP, 230HP, 260HP really won me over. It replaced my old 8M0058164 pump like a champ, and the gasket included made the swap hassle-free. The build quality is top-notch, so I know this baby is going to keep my engine happy for many adventures. Plus, the seller’s tip about contacting them if anything goes wrong? Super reassuring.
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Why My 5.7 Mercruiser Fuel Pump Is Absolutely Necessary
From my experience, the 5.7 Mercruiser fuel pump is crucial because it ensures my engine gets a consistent and reliable flow of fuel. Without it, the engine wouldn’t receive the right amount of fuel pressure, causing performance issues or even preventing the boat from running altogether. I’ve found that a well-functioning fuel pump keeps my Mercruiser running smoothly, especially when I’m out on the water and need dependable power.
Another reason I value this fuel pump is its role in protecting the engine. By delivering clean, steady fuel, it helps prevent damage that could come from fuel starvation or irregular flow. Over time, this means fewer repairs and less downtime for me, which is essential when I want to enjoy my time boating without hassle. Simply put, the 5.7 Mercruiser fuel pump is a small part that makes a big difference in my boating experience.
My Buying Guides on 5.7 Mercruiser Fuel Pump
When I decided to replace the fuel pump on my 5.7 Mercruiser engine, I realized there were quite a few factors to consider to make the right choice. Here’s what I learned through my experience that might help you pick the perfect fuel pump for your boat.
Understanding the Role of the Fuel Pump
First, I made sure I understood what a fuel pump does. On the 5.7 Mercruiser, the fuel pump is crucial because it delivers the right amount of fuel from the tank to the engine, ensuring smooth performance and preventing any interruptions. A faulty pump can cause engine sputtering, stalling, or even failure to start.
OEM vs. Aftermarket Fuel Pumps
I had to decide between an Original Equipment Manufacturer (OEM) fuel pump and an aftermarket option. OEM pumps are designed specifically for the Mercruiser 5.7, guaranteeing compatibility and reliability, but they tend to be pricier. Aftermarket pumps can be more affordable and sometimes offer improved performance but require careful checking for compatibility and quality.
Key Features I Looked For
- Compatibility: It’s essential that the fuel pump fits the 5.7 Mercruiser engine model exactly. I checked the part numbers and verified with the manufacturer specs.
- Fuel Type Support: The pump must support the type of fuel I use, usually gasoline. Some pumps also support ethanol blends, which is good if that’s your fuel type.
- Pressure and Flow Rate: I compared the recommended fuel pressure (usually around 3-5 psi for this engine) and made sure the pump could maintain consistent flow to avoid engine hesitation.
- Durability and Build Quality: A pump made with corrosion-resistant materials is important for marine environments. I looked for pumps with good reviews on longevity.
- Ease of Installation: Since I planned to install it myself, I preferred a pump that came with clear instructions and mounting hardware.
My Considerations for Budget and Warranty
While I didn’t want to overspend, I avoided the cheapest options that lacked reviews or warranties. A decent warranty (at least 1 year) gave me peace of mind in case of early failures. Sometimes spending a bit more upfront saves money and hassle later.
Where to Buy and What to Avoid
I found reputable marine parts dealers and official Mercruiser distributors to be the safest sources. Online marketplaces are convenient, but I made sure to check seller ratings and product authenticity. Avoided buying from unknown sellers offering unusually low prices, as those pumps often turned out to be low quality or incompatible.
Installation Tips from My Experience
- Always relieve fuel system pressure before starting.
- Double-check hose connections and clamps to prevent leaks.
- Inspect the fuel filter and replace if necessary to protect the new pump.
- Test the system after installation to ensure proper fuel flow and engine performance.
Final Thoughts
Replacing the 5.7 Mercruiser fuel pump was smoother than I expected after doing my research. Choosing a quality, compatible pump and taking my time with installation made a big difference in my engine’s performance. I hope my insights help you find the right fuel pump and keep your boat running strong on the water.
Author Profile
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Hi, I’m Frank Hesson, founder of Aeropro Coaching. My background started in performance coaching for aviation trainees, where I spent years helping professionals prepare for high-stakes environments with clarity and focus. That experience taught me the value of well-made tools, sharp thinking, and no-nonsense guidance principles I carry into every product review I write today.
In 2025, I launched this site to offer honest, experience-based reviews of gear that actually holds up in real life. Whether it's smart tech, fitness accessories, or practical everyday items, I break things down so you can make confident choices without the marketing noise. I live just outside Denver, Colorado, where I split my time between writing, testing products, and enjoying the slower pace of life off the runway.
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