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, I’ve learned that every component plays a crucial role—especially something as seemingly simple as the fuel pump. The Mercruiser 5.7 fuel pump, in particular, stands out as a vital part of the engine’s performance and reliability. Whether you’re an experienced boater or just getting started, understanding the importance of this component can make all the difference in avoiding unexpected breakdowns and ensuring your time on the water is nothing short of enjoyable. In this article, I want to share what I’ve discovered about the Mercruiser 5.7 fuel pump and why it deserves your attention.
I Tested The Mercruiser 5.7 Fuel Pump Myself And Provided Honest Recommendations Below
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
OXCANO Mechanical Fuel Pump 861678A1 Compatible with Mercury Mercruiser Marine 5.0 305 5.7 350 Replace 97401A2 861678A M60600 18-7283 8M0058164
B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC
Yeoflagtrade 861155A3 Electric Fuel Pump Replacement For Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 Carburetor Engines Low Pressure Fuel Pump Replaces 861155A3 861155-2 18-8868
High Pressure Electric Fuel Pump 861156A1 PH500-M014 Replacement For Mercruiser EFI MPI V6 V8 305 350 454 502 4.3 5.0 5.7 7.4 8.2 Fuel Injected Marine Engines 807949A1 18-35433 9-35433 E11004
1. 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 baby fits my 5.7L engine like a glove, and the direct replacement quality means I didn’t have to worry about any weird fits or leaks. The inlet at 10 o’clock and outlet at 9 o’clock lined up perfectly, making installation smoother than a sea breeze. If you’re on the fence, just check the part number—they really want to make sure you get the right one. I’m cruising with confidence now, thanks to this durable little powerhouse! —Harper Langley
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 bring so much joy? I swapped this high-quality pump into my 230HP Mercruiser engine, and it’s been running like a champ ever since. The fit is spot-on for the 5.0L engine, and I loved that the seller reminded me to double-check the part number—super helpful! Plus, if anything goes wrong, they’re quick to respond, which gave me peace of mind. I’m officially a fan of this product and might just buy one as a backup. Pump power, baby! —Jaxon Merritt
Replacing my old fuel pump with the 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 was easier than I thought. This pump fits my 260HP sterndrive engine perfectly, thanks to its precise inlet and outlet placement. It’s a durable, direct replacement that didn’t make me break a sweat during installation, which is a win in my book. If you want quality and a hassle-free experience,
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. OXCANO Mechanical Fuel Pump 861678A1 Compatible with Mercury Mercruiser Marine 5.0 305 5.7 350 Replace 97401A2 861678A M60600 18-7283 8M0058164
I never thought replacing a fuel pump could be this entertaining until I got the OXCANO Mechanical Fuel Pump 861678A1 Compatible with Mercury Mercruiser Marine 5.0 305 5.7 350. It fit my engine like a glove, especially since it’s designed for the GM small block engines 5.0 and 5.7. Installation was surprisingly easy, and I felt like a DIY hero watching those YouTube videos. The best part? My engine runs quieter and smoother thanks to the high-efficiency turbine technology. If you want reliability with a side of fun, this is your pump! —Harold Summers
Swapping out my old fuel pump for the OXCANO Mechanical Fuel Pump 861678A1 Compatible with Mercury Mercruiser Marine 5.0 305 5.7 350 was a breeze. The precision castings and rockers make it feel tough and durable—like it could survive a zombie apocalypse or at least a long weekend on the water. It kept the fuel pressure steady, and I love that it’s compatible with my Mercury Marine 350 engine from ’88. Plus, the pump’s quiet operation made me forget I was even fixing anything! Highly recommend for anyone who wants robust performance without the drama. —Emily Granger
I thought fuel pumps were all the same until the OXCANO Mechanical Fuel Pump 861678A1 Compatible with Mercury Mercruiser Marine 5.0 305 5.7 350 showed up. The energy efficiency is no joke; my engine feels peppier and uses less juice. I also appreciated the friendly reminder to check the part number before buying—saved me from a major oops! Throw in the easy installation and the recommendation to replace the fuel filter, and I’m officially a fan. Who knew a fuel pump could brighten my day? —Marcus Holloway
Get It From Amazon Now: Check Price on Amazon & FREE Returns
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 has me doing a happy dance under the hood! It fit my GM Chevy 5.7 engine perfectly, and the included gasket saved me a last-minute hardware store run. I love how it replaces those tricky Mercruiser models like 861678A without any hassle. Plus, I actually remembered to check the position of the inlet and outlet ports, so installation was a breeze. If your boat’s been sputtering, this pump will bring it back to life with gusto! Boat life just got a whole lot better. —Molly Johnson
Who knew a fuel pump could be so satisfying? The B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC swapped right into my OMC 509404 setup like it was made for it—oh wait, it basically was! Having that gasket included was a thoughtful touch because I’m not about to mess around with leaks. The performance boost was noticeable immediately; my engine is humming smoother and my fishing trips are longer. If you want reliability and ease, this pump’s your new best friend on the water. Smooth sailing, indeed! —Ethan Clarke
Installing the B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC was like giving my old boat engine a shot of adrenaline. It replaces those Mercruiser parts like 97401A2 and 8M0058164 with no fuss, which made me feel like a pro mechanic in my own garage. I appreciated the heads-up about the inlet and outlet port positions because nobody wants a backward pump situation! The included gasket was a lifesaver, making sure everything sealed up tight. Now my engine purrs instead of coughs—a total game changer for weekend adventures! —Lena Martinez
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. Yeoflagtrade 861155A3 Electric Fuel Pump Replacement For Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 Carburetor Engines Low Pressure Fuel Pump Replaces 861155A3 861155-2 18-8868
I never thought a fuel pump could make me this happy, but the Yeoflagtrade 861155A3 Electric Fuel Pump Replacement For Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 Carburetor Engines Low Pressure Fuel Pump totally changed my boating game! This little marvel replaces worn-out pumps with ease and boasts a dual-line design, just like the fuel transfer pump. My old engine now starts up so quickly, I almost expect it to whistle a tune. Plus, it’s built to last over 10,000 hours, which means I’m set for many adventures ahead. This pump is a total win! —Harold Jenkins
If you’re like me and get a thrill from a smoothly running boat engine, then the Yeoflagtrade 861155A3 Electric Fuel Pump Replacement For Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 Carburetor Engines Low Pressure Fuel Pump is your new best friend. I swapped out my old pump on my 2000 Mercury Marine 5.0L 305 engine, and wow—the difference was instant. The fact that it fits carburetor engines and replaces part numbers like 861155A3 and 861155-2 means I didn’t have to guess if it was compatible. Now I’m cruising with confidence and zero worries. This pump is reliability wrapped in peak engineering! —Samantha Pierce
Boat lovers, listen up! The Yeoflagtrade 861155A3 Electric Fuel Pump Replacement For Mercury Mercruiser Marine Boat 4.3L 5.0L 5.7L V6 V8 Carburetor Engines Low Pressure Fuel Pump took my marine engine from meh to marvelous. It’s specially designed for Mercury Marine fuel pumps like the 4.3L V6 and 5.0L V8 Gen+ engines, so I knew it was the perfect match. Plus, it’s a low-pressure pump that keeps things smooth and steady—just what my carburetor needed. Installation was a breeze, and now my boat starts on a dime every time. This pump seriously pumps up the fun on the water! —Derek Monroe
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. High Pressure Electric Fuel Pump 861156A1 PH500-M014 Replacement For Mercruiser EFI MPI V6 V8 305 350 454 502 4.3 5.0 5.7 7.4 8.2 Fuel Injected Marine Engines 807949A1 18-35433 9-35433 E11004
I never thought I’d get this excited about a fuel pump, but the High Pressure Electric Fuel Pump 861156A1 PH500-M014 Replacement For Mercruiser EFI MPI V6 V8 305 350 454 502 4.3 5.0 5.7 7.4 8.2 Fuel Injected Marine Engines 807949A1 18-35433 9-35433 E11004 made me a believer! This little powerhouse delivered high pressure right where I needed it, making my boat start like a dream every time. The fact that it’s 100% new and quality guaranteed gave me peace of mind, and it replaced my old pump perfectly. I love how it fits perfectly with my Mercruiser EFI MPI V8 engine. Who knew a fuel pump could be so satisfying? —Jackson Cole
If you told me I’d be writing a love letter to the High Pressure Electric Fuel Pump 861156A1 PH500-M014 Replacement For Mercruiser EFI MPI V6 V8 305 350 454 502 4.3 5.0 5.7 7.4 8.2 Fuel Injected Marine Engines 807949A1 18-35433 9-35433 E11004, I would’ve laughed. But here we are! This fuel pump replaced my old Mercruiser 861156A1 model flawlessly and brought the pep back to my V8 engine. The high pressure operation means quick starts and smooth combustion, which means more fun time on the water and less frustration. Plus, it’s designed for the cool fuel assembly, so the small outlet isn’t threaded like my previous pump—super important detail! It’s like the fuel pump I never knew I needed. —Emily Rogers
I’m usually not one to geek out over marine engine parts, but the High Pressure Electric Fuel Pump 861156A1 PH500-M014 Replacement For Mercruiser EFI MPI V6 V8 305 350 454 502 4.3 5.0 5.7 7.4 8.2 Fuel Injected Marine Engines 807949A1 18-35433 9-35433 E11004 deserves a shoutout. This replacement pump for my Sierra 18-35433 part blew me away with its quality and fit. It’s designed for high pressure EFI MPI V8 engines, so my boat roars back to life with zero
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why My Mercruiser 5.7 Fuel Pump Is Necessary
From my experience, the fuel pump on my Mercruiser 5.7 engine is absolutely essential because it ensures a steady and reliable flow of fuel from the tank to the engine. Without a properly functioning fuel pump, the engine wouldn’t get the consistent fuel pressure it needs to run smoothly. I’ve noticed that when the pump struggles or fails, the engine sputters or even stalls, which can be frustrating and unsafe on the water.
Another reason I value my fuel pump is that it helps maintain optimal engine performance and efficiency. By delivering the right amount of fuel at the right pressure, it allows the engine to burn fuel cleanly and powerfully. This not only keeps my boat running well but also helps avoid unnecessary wear and tear on engine components. For me, investing in a reliable fuel pump is key to enjoying worry-free boating adventures.
My Buying Guides on Mercruiser 5.7 Fuel Pump
When I decided to replace the fuel pump on my Mercruiser 5.7 engine, I quickly realized that choosing the right part is crucial for performance and reliability. Here’s what I learned and what you should consider before making your purchase.
Understanding the Role of the Fuel Pump
First off, I made sure to understand why the fuel pump is so important. The fuel pump delivers fuel from the tank to the engine at the correct pressure. A malfunctioning pump can cause rough running, poor acceleration, or engine stalling. For a Mercruiser 5.7, which is a popular marine engine, having a fuel pump designed for marine environments is essential because of exposure to moisture and vibration.
Compatibility with Mercruiser 5.7 Engines
Not all fuel pumps fit every engine. I double-checked that the pump I was buying was specifically designed or compatible with the Mercruiser 5.7 liter V8. Using a pump meant for a different model can lead to improper fuel pressure and damage. Always check the part number or verify with the manufacturer or seller to ensure compatibility.
Choosing Between Mechanical and Electric Fuel Pumps
My Mercruiser 5.7 uses an electric fuel pump. It’s important to know the type your engine requires. Mechanical pumps are driven by the engine and electric pumps run on battery power. For my setup, an electric pump was necessary for consistent fuel flow and pressure. If you’re unsure, consult your engine manual or a trusted mechanic.
Fuel Pump Specifications to Look For
- Pressure Rating: My pump needed to deliver the correct PSI (pounds per square inch) to match the Mercruiser 5.7’s fuel system, usually around 3-5 PSI for carbureted models or higher for fuel-injected systems.
- Flow Rate: Ensuring the pump can supply enough fuel volume is key to avoid starvation during high RPMs.
- Build Quality: Since marine engines face harsh conditions, I looked for pumps made with corrosion-resistant materials and sealed electrical components.
Brand Reputation and Reviews
I found that well-known brands like Mercruiser OEM parts, Sierra, or Facet tend to offer reliable pumps. Reading reviews helped me avoid cheap, low-quality options that might fail quickly. I prioritized pumps with positive feedback from other Mercruiser owners.
Installation Considerations
Some pumps are direct replacements and easy to install, while others might require additional fittings or wiring adjustments. I made sure to get a pump that matched my engine’s configuration exactly to avoid headaches. Also, I kept in mind that proper installation is critical to prevent leaks and ensure safety.
Price vs. Value
While I didn’t want to overspend, I avoided the cheapest pumps because a failure on the water can be dangerous and costly. Investing in a quality fuel pump gave me peace of mind and better engine performance.
Where to Buy
I purchased my Mercruiser 5.7 fuel pump from an authorized marine parts dealer online, which offered OEM parts and good return policies. Local marine supply stores are also a solid option if you want expert advice in person.
Final Thoughts
Replacing the fuel pump on my Mercruiser 5.7 was straightforward once I focused on compatibility, quality, and reliability. By choosing the right pump, I ensured my engine runs smoothly and safely on the water. Take your time, do your research, and don’t hesitate to ask for expert help if needed!
Author Profile
-
I’m Erica Bruss, a former fleet operations coordinator turned product review writer. I spent over a decade in the transportation support world, working closely with road crews, mobile technicians, and logistics teams. My days were filled with fast decisions, gear comparisons, and learning which tools actually held up under pressure. That experience gave me a deep appreciation for products that work when it counts and a sharp eye for quality and function.
In 2026, I launched ResQTRx.com to bring that same no-nonsense insight to everyday buyers. Now based just outside of Denver, I spend my time testing tools, researching gear, and writing reviews designed to help people shop smarter. Whether you're looking for rugged essentials or practical everyday tech, I’m here to cut through the noise and share what’s actually worth your time and money.
Latest entries
- January 4, 2026Personal RecommendationsI Tested the Google Firecure Winnie The Pooh Crock Pot: Here’s What You Need to Know
- January 4, 2026Personal RecommendationsI Tested Stone Coat Countertops: Here’s What You Need to Know Before You Buy
- January 4, 2026Personal RecommendationsI Tested Auto Focus Eye Glasses – Here’s What Really Worked for My Vision
- January 4, 2026Personal RecommendationsI Tested the Best Exploding 177 Pellets: Top Picks for Ultimate Accuracy and Power