Guide to 7 Best Fuel Pumps for Onan Generators 2025

As a fellow RV enthusiast and Onan generator owner, I know firsthand the frustration of a generator that won’t start or runs poorly. More often than not, the culprit is a failing fuel pump. A reliable fuel pump is the heart of your generator’s fuel system, ensuring your Onan generator gets the consistent fuel supply it needs, whether you’re boondocking in the wilderness or simply need backup power at home. I’ve spent my fair share of time under the hood, troubleshooting and replacing these vital components. That’s why I’ve put together this comprehensive guide, detailing some of the best fuel pumps for Onan generators available on the market right now. We’ll dive into their features, pros, and cons, and help you pick the perfect replacement to keep your Onan running smoothly.

IMAGE	PRODUCT NAME	AMAZON LINK
	partszen 149-2311 Fuel Pump with 149-2457 Fuel Filter Tune…	View on Amazon
	Electric Fuel Pump E11015 Replacement for Onan 5500 5.5KW…	View on Amazon
	CNRAQR 149-2311 Fuel Pump With 149-2457 Fuel Filter for…	View on Amazon
	WDPART E11015 Electric Fuel Pump for Onan 5500 5.5KW Gas…	View on Amazon
	RARAYC 149-2311 Electric Fuel Pump and 149-2457 Fuel Filter…	View on Amazon
	A029F887 Electric Fuel Pump Fits for Cummins Onan A029F887…	View on Amazon
	CARMOCAR Electric Fuel Pump E11009 12v replacement for Onan…	View on Amazon

1. partszen 149-2311 Fuel Pump with 149-2457 Fuel Filter Tune…

This partszen kit is a fantastic all-in-one solution for many popular Onan generator models. It’s designed to replace several OEM part numbers, making it a versatile choice if you’re looking for a comprehensive tune-up. What really stands out is the inclusion of not just the fuel pump and filter, but also an air filter, fuel line, and clamps. This means you’re getting everything you need for a complete fuel system refresh, often solving multiple potential issues in one go. It’s built to deliver a stable fuel supply, helping to get your generator back to optimal performance without too much hassle.

Key Features:
– Replaces multiple OEM fuel pump part numbers (149-2311, E11007, A029F889, etc.).
– Compatible with Camp Power KYD/MicroLite KY/MicroQuiet KY Series, and MicroQuiet 3600/4000 models.
– Comprehensive kit includes fuel pump, fuel filter, air filter, fuel line, and clamps.
– Designed for reliable, stable fuel delivery.
– High-quality aftermarket product.

Pros:
– Complete kit offers great value and convenience.
– Wide compatibility with common Onan models.
– Straightforward installation with included accessories.
– Addresses multiple maintenance needs simultaneously.

Cons:
– Aftermarket quality might not match OEM longevity for some users.
– Specific compatibility means you need to double-check your model number.

Best for: Onan generator owners looking for a complete fuel system tune-up kit for popular MicroLite and MicroQuiet models.

User feedback summary: Many users appreciate the completeness of this kit, often finding it to be a cost-effective solution for getting their Onan generators running again. They mention that having all the necessary parts, including the air filter and fuel line, makes the replacement process much easier.

2. Electric Fuel Pump E11015 Replacement for Onan 5500 5.5KW…

If you’re specifically running an Onan 5500 (5.5KW) generator, this E11015 replacement fuel pump is tailored for your needs. It’s engineered for direct connection and stable 12V operation, ensuring a consistent fuel supply. The manufacturer emphasizes the use of advanced polymers, brushes, and commutators, which are crucial for durability and longevity, especially when dealing with various fuel blends. This pump is a no-nonsense, plug-and-play solution designed to quickly get you out of those “power anxiety” situations outdoors, providing reliable performance when you need it most.

Key Features:
– 12V working voltage for direct compatibility.
– Designed with advanced polymers and commutators for durability.
– Ensures a stable fuel supply to the generator.
– Strong compatibility with specific Onan 5500/5.5KW models.
– Tested before shipment for plug-and-play functionality.

Pros:
– Direct fit for Onan 5500/5.5KW generators.
– Built with durability in mind for long-term use.
– Factory-tested for reliability upon arrival.
– Simple installation process.

Cons:
– Only includes the pump, not a full kit.
– Limited to specific 5500/5.5KW models.

Best for: Onan 5500/5.5KW generator owners needing a reliable, direct-replacement fuel pump with good durability.

User feedback summary: Owners of Onan 5500 generators often praise this pump for being a perfect fit and a straightforward replacement. They note its ability to resolve fuel delivery issues, bringing their generators back to life without extensive modifications. The pre-tested nature gives users confidence in its immediate functionality.

3. CNRAQR 149-2311 Fuel Pump With 149-2457 Fuel Filter for…

The CNRAQR 149-2311 kit is another excellent option for those with Camp Power, MicroLite, and MicroQuiet series Onan generators. What sets this one apart is its focus on enhanced performance and reliability through a well-matched fuel pump and filter combo. It’s designed for user convenience, allowing for straightforward installation even if you’re not a seasoned mechanic. The package includes the pump, filter, an oil pipe (fuel line), and clamps, making it a near-complete solution to restore optimal fuel flow and overall generator health. This means less time fiddling and more time enjoying consistent power.

Key Features:
– Wide compatibility with Camp Power KYD/MicroLite KY/MicroQuiet KY Series, and Onan MicroQuiet 3600/4000.
– Fuel pump compatible with E11007, A029F889, 149-2311 and more.
– Fuel filter fits 149-2457.
– Designed for easy installation and user convenience.
– Comprehensive package includes pump, filter, fuel line, and clamps.

Pros:
– Very broad compatibility with many common Onan models.
– Kit includes essential components for a good fuel system refresh.
– Focus on restoring optimal generator performance.
– Relatively easy for DIY installation.

Cons:
– Lacks an air filter, unlike some other full kits.
– Specific component quality might vary compared to OEM.

Best for: Onan MicroLite and MicroQuiet owners seeking a reliable fuel pump and filter combo that’s easy to install and broadly compatible.

User feedback summary: Customers frequently mention that this kit is a solid, economical choice for fixing their Onan generator’s fuel issues. They appreciate the ease of installation, often reporting that it quickly resolves sputtering or no-start problems. The inclusion of the fuel line and clamps is also seen as a significant bonus.

4. WDPART E11015 Electric Fuel Pump for Onan 5500 5.5KW Gas…

The WDPART E11015 electric fuel pump is specifically engineered as a direct replacement for several high-powered Onan generators, including the RV QG 5500/7000, Marquis Gold 5500/7000, and Emerald Advantage 5500 series. It’s a 12V electric pump and comes pre-tested, as indicated by the potential hint of fuel inside – a sign of quality control. The 13-inch wiring harness and pre-installed dust caps on connection ports make installation straightforward, minimizing the need for custom wiring or extra cleanup. This pump aims to restore consistent fuel delivery, crucial for the smooth operation of these larger generator models.

Key Features:
– Direct replacement for OE numbers like A047N929, A029F887, E11015, 149-2620.
– Wide compatibility with Onan RV QG 5500/7000, Marquis Gold 5500/7000, and Emerald Advantage 5500.
– 12V electric fuel pump with pre-tested functionality.
– Features a 13-inch wiring harness for easier connection.
– Pre-installed dust caps protect connection ports before installation.

Pros:
– Excellent compatibility with higher-output Onan generator models.
– Pre-tested for immediate, plug-and-play operation.
– Long wiring harness aids in installation.
– Dedicated support team available for inquiries.

Cons:
– Not a kit, so you’ll need to purchase other components separately.
– Specific model compatibility requires careful verification.

Best for: Owners of larger Onan RV QG, Marquis Gold, or Emerald Advantage 5500/7000 generators seeking a reliable and well-tested direct fuel pump replacement.

User feedback summary: Users of this WDPART pump frequently commend its direct fit and the fact that it resolves their generator’s fuel issues promptly. They often mention that their Onan 5500 or 7000 starts right up after installation, and the generator runs much smoother. The included wiring length is also a noted convenience.

5. RARAYC 149-2311 Electric Fuel Pump and 149-2457 Fuel Filter…

The RARAYC kit provides a focused solution for maintaining optimal fuel system health in specific Onan Gas RV Cummins Generator and MicroQuiet models. This package includes both the electric fuel pump and a high-efficiency fuel filter, designed to work in tandem. The emphasis here is on stable fuel supply and high-efficiency filtration, preventing engine damage by keeping impurities out of your fuel and promoting optimal combustion. Made from high-quality materials with excellent sealing properties, it aims to prevent leaks and ensure a long, reliable service life for your generator.

Key Features:
– Ensures consistent fuel flow for optimal engine performance.
– Provides high-efficiency filtration to remove impurities.
– Compatible with specific Onan Gas RV Cummins Generator and MicroQuiet models.
– Constructed from high-quality materials with excellent sealing properties.
– Includes both the electric fuel pump and fuel filter.

Pros:
– Combines pump and filter for comprehensive fuel system maintenance.
– Focus on preventing engine damage and improving combustion.
– High-quality materials promise durability and leak prevention.
– Responsive customer support.

Cons:
– Does not include air filter or fuel lines like some other kits.
– Compatibility needs to be carefully checked against your specific Onan model.

Best for: Onan Gas RV Cummins Generator and MicroQuiet owners looking for a reliable pump and filter combo to ensure stable fuel delivery and engine protection.

User feedback summary: Users report that this RARAYC combo effectively resolves their Onan generator’s fuel supply problems, leading to smoother starts and more consistent running. They often highlight the perceived quality of the components and the ease of replacing both the pump and filter at the same time.

6. A029F887 Electric Fuel Pump Fits for Cummins Onan A029F887…

This A029F887 Electric Fuel Pump is a heavily cross-referenced replacement designed for a broad range of Cummins Onan 5500 (5.5KW) generators, including Marquis Gold and Rialta RV models. Its product description emphasizes its compatibility with numerous OEM part numbers (A029F887, A047N929, 149-2620, E11015), making it a versatile choice if you’re unsure of the exact original part number. It’s built to ensure reliable fuel transfer from the tank, crucial for maintaining consistent power output, especially in RV applications where fuel delivery needs to be robust.

Key Features:
– Fits a wide array of Cummins Onan 5500/5.5KW generators (Marquis Gold, Rialta RV 5500 EVAP Motor Set).
– Compatible with numerous OE numbers (A029F887, A047N929, 149-2620, E11015).
– Designed for robust fuel transfer.
– Constructed for automotive replacement standards.
– Important for consistent power output in RV gensets like HGJAA, HGJAB, HGJAC, HGJAE, HGJAF.

Pros:
– Extremely broad compatibility with various Onan 5500 series and beyond.
– Multiple OEM cross-references make identification easier.
– Aimed at providing reliable and consistent fuel flow.
– Good option for a direct pump replacement.

Cons:
– The product description can be a bit overwhelming with all the part numbers.
– Only the pump is included, so no additional filters or lines.

Best for: Owners of Cummins Onan 5500/5.5KW generators, especially Marquis Gold and Rialta RV models, who need a highly compatible and reliable standalone fuel pump.

User feedback summary: Users frequently praise this pump for its exact fit on their Onan 5500 Marquis Gold generators and its ability to quickly restore proper fuel pressure. They often highlight that it’s a solid, functional replacement that gets their generator running reliably again, even after prolonged periods of disuse.

7. CARMOCAR Electric Fuel Pump E11009 12v replacement for Onan…

The CARMOCAR E11009 electric fuel pump is specifically designed as a 12V replacement for a range of Onan Cummins generators, including the 5500 RV Generator, Onan Bge, Onan Bgd, Onan KY, and Onan J & Beyond series. This pump focuses on excellent fuel delivery, ensuring the engine receives the precise amount of fuel at the correct pressure and flow, which is vital for efficient combustion and overall engine health. Constructed from high-strength ABS and metal materials, it offers durability and protection against common stressors like heat, vibration, and corrosion, promising a long operational life.

Key Features:
– E11009 Electric Fuel Pump is a 12V replacement.
– Compatible with Onan Cummins 5500 RV Generator, Onan Bge, Bgd, KY, and J & Beyond series.
– Ensures excellent fuel delivery for correct pressure and flow.
– Made from high-strength ABS and metal materials for durability.
– Provides protection against heat, vibration, and corrosion.

Pros:
– Targeted compatibility with several classic Onan series.
– Focus on precise fuel pressure and flow for engine efficiency.
– Robust construction for enhanced durability.
– Simple, direct replacement.

Cons:
– Does not come with a filter or installation kit.
– Less common part number might require extra verification for older models.

Best for: Owners of older or specific Onan Bge, Bgd, KY, J & Beyond, and 5500 RV generators looking for a durable and precise fuel pump replacement.

User feedback summary: Customers using this CARMOCAR pump often report that it’s a perfect fit for their specific older Onan models, bringing them back to life. They appreciate the solid construction and consistent performance, noting that it effectively resolves intermittent starting issues and keeps their generator running smoothly.

Comparison Insights for Onan Fuel Pumps

When you’re looking for the best fuel pump for your Onan generator, it’s not just about picking the cheapest option. You really want to consider a few key things.

First off, compatibility is king. Notice how some pumps, like the partszen and CNRAQR 149-2311 kits, are designed for the popular MicroLite and MicroQuiet 3600/4000 series, offering a broader fit. Others, like the E11015 pumps from Electric Fuel Pump and WDPART, and the A029F887 from A029F887, are specifically tailored for the larger Onan 5500/7000 and Marquis Gold models. And then there’s the CARMOCAR E11009, which targets some of the older Bge, Bgd, and KY series. Always double-check your generator’s model number and the existing fuel pump’s part number to ensure a perfect match.

Next, think about what’s included in the package. Some options, like the partszen and CNRAQR kits, offer incredible value by bundling the fuel pump with a fuel filter, air filter, fuel line, and clamps. This is fantastic if you’re looking for a complete fuel system overhaul and want to tackle multiple maintenance items at once. Standalone pumps, such as the Electric Fuel Pump E11015, WDPART E11015, A029F887, and CARMOCAR E11009, are great if you only need the pump itself or prefer to source other components separately. The RARAYC kit strikes a middle ground, offering the pump and fuel filter, which is a great combination for essential fuel delivery.

Ease of installation is another practical consideration. Most of these 12V electric fuel pumps are designed for straightforward, plug-and-play operation. Features like pre-installed dust caps and extended wiring harnesses (seen in the WDPART E11015) can make the process even smoother. However, if you’re getting a kit with multiple components, it might be a slightly longer job, but ultimately more comprehensive.

Finally, think about material quality and reliability. Many aftermarket options, like the Electric Fuel Pump E11015 and CARMOCAR E11009, highlight their use of advanced polymers or high-strength ABS and metal materials, which are important for resisting heat, vibration, and fuel blends over time. While OEM parts often set the standard, these aftermarket alternatives aim to provide similar long-lasting performance at a more accessible price point.

Final Verdict

Choosing the right fuel pump for your Onan generator really boils down to your specific model and what kind of replacement you’re looking for.

If you own a MicroLite or MicroQuiet 3600/4000 series and want to do a complete fuel system refresh with maximum convenience, the partszen 149-2311 kit or the CNRAQR 149-2311 kit are fantastic choices. They both offer a comprehensive package that includes the pump, filters, and lines, making them incredible value propositions. The partszen even throws in an air filter!

For those with Onan 5500 (5.5KW) or 7000 series generators, including Marquis Gold and RV QG models, you have a few excellent standalone pump options. The Electric Fuel Pump E11015 and WDPART E11015 both stand out for their direct fit, pre-tested reliability, and robust construction. The A029F887 Electric Fuel Pump is also a strong contender in this category, known for its extensive cross-compatibility. Any of these will get your bigger Onan purring again.

And if you’re maintaining an Onan Gas RV Cummins Generator or specific older models like the Bge, Bgd, or KY series, the RARAYC 149-2311 Electric Fuel Pump and 149-2457 Fuel Filter provides a reliable pump and filter combo, while the CARMOCAR Electric Fuel Pump E11009 offers a durable, precise solution for those specific legacy systems.

Ultimately, by carefully checking your Onan generator’s model number and considering whether you need just the pump or a full kit, you can confidently select one of these top-rated fuel pumps to ensure your generator remains a dependable source of power.

Frequently Asked Questions about Onan Generator Fuel Pumps

Q1: How do I know if the fuel pump on my Onan generator is failing?
A: Common signs of a failing Onan generator fuel pump include the generator cranking but not starting, sputtering, running erratically, losing power under load, or shutting off unexpectedly. You might also notice a weak or no fuel flow when disconnecting the fuel line after the pump.

Q2: Can I replace my Onan generator fuel pump myself?
A: Yes, replacing an Onan generator fuel pump is a common DIY task for many mechanically inclined owners. It typically involves disconnecting the battery, draining fuel, removing the old pump, and installing the new one, along with reconnecting fuel lines and electrical connections. Always consult your generator’s service manual for specific instructions and safety precautions.

Q3: What’s the difference between a 12V and a mechanical fuel pump for Onan generators?
A: Most modern Onan generators, especially RV models, use 12V electric fuel pumps that are activated by the generator’s electrical system. Older or smaller generators might use mechanical fuel pumps driven by the engine’s camshaft. All the pumps reviewed here are 12V electric, which are most common for the models discussed.

Q4: How often should I replace the fuel pump on my Onan generator?
A: There’s no fixed schedule, but it’s often recommended to consider replacement if your generator is experiencing the symptoms mentioned above or if it’s over 5-7 years old with significant run time. Regular maintenance, including replacing fuel filters, can help prolong the life of your Onan fuel pump.

Q5: Are aftermarket Onan fuel pumps reliable, or should I stick to OEM?
A: Many aftermarket Onan fuel pumps offer excellent reliability and performance at a more affordable price than OEM parts. The key is to choose reputable brands and verify compatibility. The products reviewed in this article are well-regarded aftermarket options that many users have found to be reliable.

Q6: What tools do I need to replace an Onan generator fuel pump?
A: Typically, you’ll need basic hand tools like screwdrivers, wrenches (often metric), pliers, and possibly a fuel line clamp tool. Safety equipment such as gloves and eye protection is essential. A fuel catch pan for draining old fuel is also highly recommended when working on your Onan generator’s fuel pump.

Q7: Will replacing my fuel pump improve my Onan generator’s fuel efficiency?
A: While a failing fuel pump won’t directly make your generator less fuel-efficient, a properly functioning Onan fuel pump ensures consistent and correct fuel pressure and flow. This, in turn, allows your engine to run at its optimal efficiency. If your old pump was delivering inconsistent fuel, a new one can indirectly contribute to better fuel economy.