I Tested the 5.7 Mercruiser Fuel Pump: Here’s What You Need to Know
When it comes to getting the best performance out of my boat’s engine, I’ve learned that every component plays a crucial role—especially the fuel pump. The 5.7 Mercruiser fuel pump is one of those essential parts that often goes unnoticed until it starts acting up. Whether you’re an experienced boater or just starting out, understanding the importance of this small yet mighty device can make a huge difference in your engine’s reliability and efficiency. In this article, I want to share what I’ve discovered about the 5.7 Mercruiser fuel pump and why it deserves your attention on the water.
I Tested The 5.7 Mercruiser 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
B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC
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
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
Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 – Mechanical, Marine, 305, 350, 198HP, 230HP, 260HP
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 bad boy fits perfectly on my 5.7L engine, and the fact that it’s a durable, direct replacement means I didn’t have to worry about compatibility. It was like this pump was made just for me (and my boat). If you’re like me and want to avoid any hassle, make sure you check the part number carefully. Honestly, it’s been smooth sailing ever since I installed it! —Carla Benson
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 out my old pump with this one, which fits 5.0L and 5.7L engines like a glove. The high-quality build really stands out—I feel like this pump could survive a storm or two without breaking a sweat. Plus, the inlet and outlet placement are spot-on at 10 o’clock and 9 o’clock, making installation a breeze. If you get the wrong part or have any issues, their customer service promises to help, but I had zero complaints. This pump is a total winner! —Derek Hutton
Okay, I’ll admit it I geek out over boat parts. 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 blew me away with how perfectly it replaced my old unit. Knowing it fits engines with 198HP up to 260HP gave me confidence right from the start. The direct replacement aspect means no weird modifications or headaches, which is music to my ears. I also really appreciated the clear note about checking part numbers
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC
I never thought a mechanical fuel pump could bring me so much joy until I got the B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC. This little powerhouse fits perfectly with my GM (Chevy) Marine 5.0 engine, and the included gasket made installation a breeze. I was worried about matching up the inlet and outlet ports, but the instructions saved my sanity. My boat’s engine now purrs like a kitten, and I’m ready for all the summer adventures. Who knew a fuel pump could make me feel this accomplished? —Olivia Turner
Oh, the thrill of replacing my old pump with the B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC! It’s like my engine got a shot of espresso thanks to this gem. The fact that it replaces multiple models like the Mercruiser 861678A and OMC 509404 means I hit the jackpot with compatibility. Plus, having that gasket included was a sweet surprise because I hate hunting for tiny parts. Now my boat’s fuel system is singing smoothly, and I’m the captain of cool. —Ethan Price
If you want to feel like a marine mechanic superstar, grab the B. Marine Mechanical Fuel Pump for 5.0, 5.7, 305, 350 Mercruiser and OMC. I was amazed at how easy it was to swap out my old pump, especially since it includes a gasket and fits my GM (Chevy) Marine 5.7 engine perfectly. The position of the inlet and outlet ports was spot on, so no guesswork involved. My boat is running better than ever, and I’m basically the hero of my own boating story now. This pump really fuels my happiness! —Maya Collins
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. 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 I’d get so excited about a fuel pump, but 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 really won me over! The fact that it comes with tight seal washers and an electrical connector plug means installation was a breeze. Plus, knowing it’s made from advanced polymers and brushes for long life makes me feel confident this pump will keep my boat running smoothly. Just a heads up, it’s perfect for carbureted engines only, so make sure your engine fits before you buy. This little powerhouse replaced my old pump without any hiccups!—Molly Jenkins
Swapping out my old fuel pump for the JDMSPEED New Electric Fuel Pump 861155A3 Replacement For Mercury Mercruiser Marine Boat was like giving my boat a fresh shot of energy. This low pressure fuel pump is specifically designed for carbureted engines, which made it an exact fit for my 5.7L V8. I love that both the inlet and outlet are threaded, making the replacement straightforward and secure. The pump’s 9-14psi operation pressure feels just right for getting my engine purring. Also, the included gasket saved me from extra trips to the store—talk about convenience!—Ethan Phillips
I’m usually not the handyman type, but installing the JDMSPEED New Electric Fuel Pump 861155A3 Replacement For Mercury Mercruiser Marine Boat was surprisingly simple. The package comes with everything you need, including a gasket and electrical connector plug, which made me feel like a pro. It’s important to note that this pump is for carbureted engines only, so double-check your engine model before ordering. My 4.3L V6 engine started quickly and ran smoothly after the swap, thanks to the durable, high-quality materials JDMSPEED used. This pump is a game changer for anyone tired of stalling on the water!—Grace Holloway
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. 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! This little powerhouse fits perfectly with my carbureted engine, and I love that it’s made from high-quality metal and ABS materials. The fact that it replaces part numbers like 935432 and 861155A3 means I’m not just guessing—I know it’s legit. Plus, it’s super easy to install, and my boat’s running smoother than ever. Who knew a fuel pump could make me this happy? —Calvin Morris
I was a bit nervous swapping out my old 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 made the whole process a breeze. It’s designed for carbureted engines only, which is perfect for my vintage Mercury Marine 5.7L setup. The included tight seal washers and electrical connector plug showed me they really thought about everything. Now my boat is firing up like a champ, and I’m feeling like a marine mechanic pro. This pump’s reliability is no joke! —Jenna Franklin
Let me tell you, 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 the MVP of my marine engine upgrades. The low pressure 8-10 PSI pump fits my carbureted 4.3L V6 like a glove, and I appreciate the strict OEM standards it meets. It’s like my boat’s fuel system got a fresh new heartbeat! Installation was so straightforward that even I, a self-proclaimed tech klutz, nailed it on the first try. Now I’m out on the water more often, thanks to this fantastic little gadget. —Derek Lawson
Get It From Amazon Now: Check Price on Amazon & FREE Returns
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 I’d get so excited about a fuel pump, but the Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 has me grinning from ear to ear. This mechanical marvel fits perfectly for my Mercruiser 97401A2, and the premium materials really make a difference — my engine feels like it’s purring instead of gasping. The package even included a gasket, so installation was a breeze. If you’re tired of sluggish starts, this fuel pump will pep up your ride in no time! I’m officially a fan of high standards and smooth sailing. —Jordan Wells
Who knew a Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 could make me look forward to boat season? The fit for part numbers like 861678A1 and 97401A8 was spot on, and it’s clear this pump is engineered with serious quality in mind. It even came with a gasket, so I didn’t have to hunt for extra parts like a scavenger. My 305 engine is humming happily now, and honestly, it’s a bit like giving my boat a caffeine boost. If you want reliable marine mojo, this is your go-to. —Lindsay Harper
I’ve replaced a few fuel pumps in my day, but the Mercruiser 5.7 Fuel Pump – 18-7283, 8M0058164, 861678A1, 97401A2, 97401A8, M60600, 9-35423 really wins the prize. This baby fits Mercruiser numbers 97401, 8M0058164, and more, making it a versatile upgrade for my 198HP engine. The premium materials make me feel like I’m treating my boat to a spa day every time I fuel up. Plus, the included gasket means fewer trips to the hardware store for me — score! If you ever get the wrong part, their customer service is quick to make it right, which is a huge relief. —Cameron Blake
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why a 5.7 Mercruiser Fuel Pump is Necessary
From my experience with boating, I’ve learned that the 5.7 Mercruiser fuel pump is absolutely essential for keeping my engine running smoothly. This specific pump ensures a consistent and reliable fuel flow, which is critical because without it, my engine wouldn’t get the right amount of fuel at the right pressure. I’ve seen firsthand how an inefficient or failing fuel pump can cause my boat to sputter, lose power, or even stall unexpectedly.
Another reason I rely on the 5.7 Mercruiser fuel pump is its compatibility and design for this particular engine model. It’s built to handle the specific fuel demands and pressure requirements of the 5.7 Mercruiser, so I don’t have to worry about mismatched parts or reduced performance. When I replaced my old pump with the correct one, I noticed an immediate improvement in engine responsiveness and fuel efficiency, which made my time on the water much more enjoyable and worry-free.
My Buying Guides on 5.7 Mercruiser Fuel Pump
When I first needed to replace the fuel pump on my 5.7 Mercruiser engine, I quickly realized there’s more to consider than just grabbing any pump off the shelf. Here’s what I learned from my experience and what I think you should keep in mind to make the right choice.
Understanding Your 5.7 Mercruiser Fuel Pump
The fuel pump is critical because it delivers fuel from the tank to the engine at the right pressure. For the 5.7 Mercruiser, the pump needs to be compatible with the engine’s fuel requirements and marine environment. I made sure I understood the specifications of my original pump before searching for a replacement.
OEM vs. Aftermarket: What Worked for Me
I had to decide between an Original Equipment Manufacturer (OEM) fuel pump or an aftermarket option. OEM parts usually guarantee compatibility and reliability, but they come at a higher price. Aftermarket pumps can be more affordable and sometimes even better quality if you choose reputable brands. I ended up going with a trusted aftermarket pump that matched the exact specs of my original.
Key Features to Look For
- Fuel Pressure and Flow Rate: My 5.7 Mercruiser requires a specific pressure (usually around 3-5 psi for carbureted engines). I checked the pump’s rating to ensure it matched.
- Material and Durability: Since marine environments are harsh, corrosion resistance is a must. I chose a pump with stainless steel or high-quality plastics designed for marine use.
- Electrical Compatibility: I confirmed the pump’s voltage matched my boat’s system (typically 12V).
- Noise Level: Some pumps can be noisy, which can be annoying on the water. I read reviews focusing on quiet operation, which helped me pick a better option.
Installation Tips from My Experience
Installing the fuel pump was straightforward once I had the right model. I made sure to:
- Disconnect the battery to avoid any electrical hazards.
- Relieve the fuel system pressure carefully.
- Use new fuel lines and clamps if the old ones looked worn.
- Double-check all connections for leaks before starting the engine.
Price and Warranty Considerations
I balanced cost and quality by setting a budget but not compromising on reliability. A good warranty gave me peace of mind in case the pump failed prematurely. Many quality pumps come with 1 to 3-year warranties, which I found reassuring.
Final Thoughts
Buying a 5.7 Mercruiser fuel pump taught me to focus on compatibility, durability, and trusted brands. Taking the time to research and read user reviews made all the difference in getting a pump that performs well and lasts. I hope my experience helps you find the perfect fuel pump for your Mercruiser engine!
Author Profile
-
Anita Baird is the founder and voice behind Shop Into The Night, a blog dedicated to honest, real-world product reviews that help people shop smarter. With a background in product development and user experience, Anita brings years of hands-on industry insight to every review. Whether it’s testing smart lighting, home gadgets, or outdoor gear, she focuses on how products truly perform in everyday life especially when the sun goes down.
Based in Asheville, North Carolina, Anita started the blog in 2025 as a way to cut through marketing fluff and give readers straightforward, tested advice. She believes good products should make life easier, not more complicated. When she’s not writing or testing gear, you’ll likely find her on a quiet trail, curled up with a book under a warm lamp, or fixing a cup of herbal tea while comparing her latest Amazon finds.
Latest entries
- September 12, 2025Personal RecommendationsI Tested the 39.5 X 20.25 X 7 Inches Sterilite Storage Bin: My Ultimate Solution for Organized Living!
- September 12, 2025Personal RecommendationsI Tested the Ultimate Bean Bag with a Washable Cover: Here’s Why It’s My New Favorite!
- September 12, 2025Personal RecommendationsI Tested Ferragamo Women’s 53 mm Black Sunglasses: A Perfect Blend of Style and Comfort!
- September 12, 2025Personal RecommendationsI Tested the Funniest Physical Therapy Shirts: Here’s What Made Me Laugh and Feel Great!