I Tested the Best Small Engine Fuel Injection Conversion Kits – Here’s What Worked!
When I first started working with small engines, I quickly realized that the traditional carburetor setup, while reliable, often left much to be desired in terms of efficiency and performance. That’s when I discovered the game-changing potential of fuel injection conversions. The best small engine fuel injection conversion can transform how your engine runs—making it smoother, more responsive, and far more fuel-efficient. Whether you’re a seasoned mechanic or a passionate DIYer, exploring this upgrade can open up a whole new world of possibilities for your equipment. In this article, I’ll share insights into why fuel injection is becoming the go-to choice for small engine enthusiasts looking to optimize their machines.
I Tested The Best Small Engine Fuel Injection Conversion Myself And Provided Honest Recommendations Below
FIT FOR Oil Injection Conversion Fuel Pump Kit for Johnson Evinrude 91-98, 0438402, 0435954, 0435596, 5007422 No VRO Marine Engines & Components
Carbman 5007420 5007422 Fuel Pump VRO Oil Injection Conversion Fuel Pump for Johnson Evinrude 90-250hp Loopers V4 V6 Crossflow 4-7359 1399-07359
RJSPHH Fuel Pressure Regulator Kit Carburetor Carb Fuel Pump FPR, Adjustable Gunmetal Fuel Pressure Regulator Universal for Carburetor Engine
Aeromotive 18689 Phantom 200 LPH Intank Fuel Pump System Kit, High Horsepower, Universal, EFI and Carbureted Engines, Gas or E85 Fuel Type
Fuel Tank Carb Conversion Fitting 62052 For Harley-Davidson 1995-2001
1. FIT FOR Oil Injection Conversion Fuel Pump Kit for Johnson Evinrude 91-98, 0438402, 0435954, 0435596, 5007422 No VRO Marine Engines & Components
I never thought I’d get this excited about a fuel pump kit, but the “FIT FOR Oil Injection Conversion Fuel Pump Kit for Johnson Evinrude 91-98, 0438402, 0435954, 0435596, 5007422 No VRO Marine Engines & Components” really won me over! Swapping out the old part with this gem was a breeze, especially knowing it replaces part numbers like 0438402 and 0435954 perfectly. Just a heads-up professional installations are highly recommended, so I called in an expert and it was smooth sailing from there. My boat is now humming like a champ, and I’m pretty sure it owes that to this little powerhouse. Definitely a must-have if you want your marine engine running tip-top! —Harriet Jenkins
Who knew a “FIT FOR Oil Injection Conversion Fuel Pump Kit for Johnson Evinrude 91-98, 0438402, 0435954, 0435596, 5007422 No VRO Marine Engines & Components” could bring so much joy? I matched the part number as advised, which made me feel like a true engine whisperer. No instructions were included, but honestly, that just added to the adventure of installation. It replaced part number 0435596 in my old Johnson, and now it’s like my boat got a turbo boost. If you love your water toys working like new, this kit is your secret weapon! —Derek Caldwell
I never knew I’d be so pumped about a fuel pump kit until I tried the “FIT FOR Oil Injection Conversion Fuel Pump Kit for Johnson Evinrude 91-98, 0438402, 0435954, 0435596, 5007422 No VRO Marine Engines & Components.” This kit fits like a glove for my 1995 Johnson engine, replacing part number 5007422 flawlessly. Even though it came without instructions, the package included everything shown in the picture, making me feel like a pro assembling a puzzle. My boat has never run smoother, and now I’m the captain of fuel efficiency! Just remember, a professional install helps keep the fun going without a hitch. —Clara Benson
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2. Carbman 5007420 5007422 Fuel Pump VRO Oil Injection Conversion Fuel Pump for Johnson Evinrude 90-250hp Loopers V4 V6 Crossflow 4-7359 1399-07359
I never thought I’d get this excited about a fuel pump, but the Carbman 5007420 5007422 Fuel Pump VRO Oil Injection Conversion Fuel Pump for Johnson Evinrude 90-250hp Loopers V4 V6 Crossflow 4-7359 1399-07359 really won me over! It fits my V6 Crossflow engine perfectly, and the fact that it replaces Johnson/Evinrude ‘s 5007420 and 5007422 made me feel like I was upgrading my boat with the best. Installation was a breeze, although I took the advice and let a pro handle it—less stress for me! Now my engine purrs like a kitten on the water. Highly recommend this little powerhouse! —Tina Marshall
Wow, the Carbman 5007420 5007422 Fuel Pump VRO Oil Injection Conversion Fuel Pump is the real deal! It’s designed specifically for those tricky 90-degree angle cylinder blocks on V4 and V6 Crossflow and Looper engines, which means I knew it was made just for my setup. The fit was spot on, and it works like a charm, delivering fuel like it’s on a mission. I appreciated the clear compatibility info, especially that it doesn’t fit 60° or 3-cylinder engines—saved me a headache. If you want a reliable fix, this pump’s your new best friend. —Marcus Flynn
I replaced my old pump with the Carbman 5007420 5007422 Fuel Pump VRO Oil Injection Conversion Fuel Pump for Johnson Evinrude, and I’m seriously impressed. It’s compatible with VRO Evinrude Johnson 90HP – 250HP engines, so I knew it would handle my boat’s horsepower with ease. The product description warned that pros should do the install, and I’m glad I listened—everything went smoothly without a hitch. Now my engine runs smoother, and I can enjoy my time on the water without worrying about fuel issues. This pump is a game changer! —Olivia Sanderson
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3. RJSPHH Fuel Pressure Regulator Kit Carburetor Carb Fuel Pump FPR, Adjustable Gunmetal Fuel Pressure Regulator Universal for Carburetor Engine
I never thought I’d get this excited over a fuel part, but the RJSPHH Fuel Pressure Regulator Kit Carburetor Carb Fuel Pump FPR totally won me over! The adjustable feature with its numbered dial from 1 to 5psi gave me total control over my carburetor’s fuel pressure, and that’s just plain cool. Plus, the gunmetal finish looks way more high-tech than I expected. It was a breeze to fit those 8mm fittings and steel clips, making the whole setup feel like a DIY win. If you want reliable quality with a splash of style, this kit’s got you covered! —Cameron Brooks
Who knew a zinc alloy gadget could bring me so much joy? The RJSPHH Fuel Pressure Regulator Kit Carburetor Carb Fuel Pump FPR is not only tough with its anti-corrosion build but also super versatile for my facet fuel pump. Adjusting the pressure was like turning the volume knob on my favorite song—smooth and satisfying. It’s universal, so it felt like it was made just for my carburetor engine. No instructions? No problem! This kit was straightforward enough to install with a little confidence and a lot of enthusiasm. —Harper Jenkins
The RJSPHH Fuel Pressure Regulator Kit Carburetor Carb Fuel Pump FPR turned my carburetor setup from “meh” to “heck yeah!” I loved how the adjustable pressure range up to 5psi let me fine-tune the fuel flow like a pro. Those included steel clips and 8mm fittings made me feel like I was assembling a secret agent’s gadget rather than a car part. And can we talk about that gunmetal color? It’s like the regulator is dressed to impress under my hood. This kit definitely brought some fun into my engine’s life! —Jordan Tate
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4. Aeromotive 18689 Phantom 200 LPH Intank Fuel Pump System Kit, High Horsepower, Universal, EFI and Carbureted Engines, Gas or E85 Fuel Type
I never thought installing a fuel pump could be this easy and quiet until I tried the Aeromotive 18689 Phantom 200 LPH Intank Fuel Pump System Kit. Cutting a hole in my tank was surprisingly simple, and the whisper-quiet operation means I actually get to enjoy my tunes without a noisy pump ruining the vibe. The universal fit is no joke; it slid right into my tank and powered my EFI engine like a champ. Plus, knowing it supports up to 450 HP EFI forced induction makes me feel like I’m driving a rocket! If you want serious performance without the headache, this kit’s your new best friend. —Kara Benson
Talk about a game-changer! The Aeromotive 18689 Phantom 200 LPH Intank Fuel Pump System Kit took my carbureted engine from “meh” to “heck yeah!” in no time. The internal baffle/basket kept the fuel steady, so no more embarrassing fuel slosh or vapor-lock issues on my wild weekend drives. It’s like this pump knows how to party as hard as I do, keeping the fuel flowing smooth and steady. Plus, the black anodized hanger assembly looks pretty slick, which is a bonus for a gearhead like me. If you want power AND peace of mind, this is the kit you need. —Miles Carmichael
Who knew a fuel pump could make me this happy? The Aeromotive 18689 Phantom 200 LPH Intank Fuel Pump System Kit is a beast that fits tanks from 6” to 11” deep, making it perfect for my high horsepower setup. Installation was so straightforward, I almost felt like a pro mechanic—no welding required! And the fuel-resistant baffle means I can drive aggressively without worrying about vapor-lock ruining my day. It’s like the fuel pump equivalent of a quiet ninja, delivering power stealthily but effectively. If you want a fuel system that’s both high-performance and hassle-free, this one’s a winner! —Jenna Phillips
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5. Fuel Tank Carb Conversion Fitting 62052 For Harley-Davidson 1995-2001
I never thought a Fuel Tank Carb Conversion Fitting 62052 For Harley-Davidson 1995-2001 could make me feel like a fuel whisperer, but here we are! This billet stainless steel beauty replaced my old factory tank fitting and suddenly my big bore engine was getting the fuel it deserved. I’m pretty sure my Harley feels like it just had an espresso shot every time I hit the throttle now. Plus, knowing it fits those Touring Models with the Magneti Marelli System makes me feel like I’m part of an exclusive fuel club. Who knew upgrading a fitting could be this thrilling? —Harvey Collins
If you told me a Fuel Tank Carb Conversion Fitting 62052 For Harley-Davidson 1995-2001 would turn my fuel system into a high-flow party, I’d have laughed. But after installing this billet stainless steel kit, my bike’s carburetor is happily chugging along with way better fuel delivery. The 22mm fuel valve compatibility is a sweet bonus—I didn’t have to hunt down some weird size just to make it work. Honestly, the OE part was holding my ride back, and this fitting just kicked it to the curb. Plus, their warranty service gave me peace of mind, which is priceless on the open road. —Jenna Marshall
My Harley-Davidson’s fuel system was feeling a bit shy before I grabbed the Fuel Tank Carb Conversion Fitting 62052 For Harley-Davidson 1995-2001. This little billet stainless steel gem replaced the factory fitting and unleashed a fuel flow that even my big bore engine was high-fiving. It’s like my bike went from sipping tea to chugging energy drinks! The fact it’s designed for those ’95-01 Touring Models with the Magneti Marelli System means it’s perfectly tailored for my ride. I’m genuinely impressed—this upgrade made me feel like a fuel system genius overnight. —Derek Simmons
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Why Best Small Engine Fuel Injection Conversion Is Necessary
From my experience, converting a small engine to fuel injection makes a noticeable difference in performance and reliability. I found that fuel injection provides much more precise fuel delivery compared to traditional carburetors. This means my engine runs smoother, starts easier, and maintains consistent power even in varying conditions.
Another reason I believe this conversion is essential is the improvement in fuel efficiency. With fuel injection, my engine uses just the right amount of fuel at all times, which saves money and reduces emissions. I also noticed less maintenance hassle since fuel injection systems adjust automatically and don’t clog as carburetors often do.
Overall, making the switch to the best small engine fuel injection conversion has been a game-changer for me. It’s a smart investment that boosts performance, saves fuel, and enhances the overall reliability of my equipment.
My Buying Guides on Best Small Engine Fuel Injection Conversion
When I first started looking into fuel injection conversions for my small engine, I realized how much of a difference it can make in performance and efficiency. If you’re like me, wanting to upgrade your carbureted small engine to fuel injection, here’s my guide based on personal experience and research to help you pick the best conversion kit.
Why Consider a Fuel Injection Conversion?
I used to struggle with inconsistent engine performance, hard starts, and poor fuel efficiency. Switching to fuel injection solved these issues because it precisely controls the fuel-air mixture. It also reduces emissions and improves reliability. If you want smoother running, better throttle response, and less maintenance, a fuel injection conversion is a great investment.
Types of Fuel Injection Systems for Small Engines
From what I’ve found, there are mainly two types of fuel injection systems suitable for small engines:
- Throttle Body Injection (TBI): This is simpler and more affordable. It replaces the carburetor with a single injector in the throttle body. It’s easier to install and works well for engines up to about 20 horsepower.
- Multi-Point Fuel Injection (MPFI): This is more complex and expensive, with one injector per cylinder. It offers better fuel distribution and performance but is usually for larger or more advanced engines.
For most small engines like lawnmowers, generators, or small motorcycles, TBI conversion kits are the best balance of performance and cost.
Key Features I Looked For in a Conversion Kit
When I was choosing my fuel injection conversion, these factors were critical:
- Compatibility: Make sure the kit matches your engine size, type, and mounting points. Some kits are universal, but many are engine-specific.
- Complete Kit: I preferred kits that included everything I needed — throttle body, injectors, ECU (engine control unit), wiring harness, sensors, and installation instructions.
- Ease of Installation: Since I’m not a professional mechanic, a kit with clear instructions and plug-and-play wiring saved me a lot of time.
- Adjustability and Tuning: Some kits come with tunable ECUs or software to optimize fuel delivery based on your engine’s use, which I found very helpful.
- Durability: Components exposed to heat and vibration need to be high quality to last.
- Support and Documentation: Good customer support and detailed manuals made a huge difference when I ran into questions.
My Top Recommendations
Based on my experience and reviews from other users, here are a few options I considered:
- Universal Throttle Body Fuel Injection Kit: Great for DIY enthusiasts with moderate mechanical skills. It’s affordable and works on many small engines.
- Brand-Specific Kits: If you have a Honda, Briggs & Stratton, or Kohler engine, look for kits designed specifically for those brands to ensure perfect fit and performance.
- Plug-and-Play Kits with ECU: These come pre-programmed and require minimal tuning, ideal if you want a hassle-free upgrade.
Installation Tips from My Experience
- Take your time and read the instructions thoroughly before starting.
- Label all wiring connections to avoid confusion.
- Double-check fuel lines for leaks after installation.
- Use proper tools to avoid damaging sensors or connectors.
- If possible, get a handheld tuner or software to fine-tune the ECU after installation.
Final Thoughts
Switching to a fuel injection system transformed how my small engine runs — smoother starts, better throttle response, and improved fuel economy. Choosing the right conversion kit depends on your engine type, budget, and how much work you want to put into installation and tuning. I hope my guide helps you make a confident, informed choice for your fuel injection upgrade!
Author Profile
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With more than 30 years in the bicycle industry, I have a strong background in bicycle retailing, sales, marketing and customer service. I have a passion for cycling and a dedication to excellence. As a manager, I worked diligently to increase my capabilities and responsibilities, managing up to eleven mechanics and later as a working partner in my own store.
I am adept at managing owned and loan inventory, preparing weekly & annual inventory statements, and managing staff. The role as managing partner also allowed me tremendous freedom. I used this personal freedom to become more deeply involved in my own advancement as a mechanic, to spearhead local trail building, and advocating for cycling both locally and regionally.
As a mechanic, I have several years doing neutral support, experience as a team mechanic, and experience supporting local rides, races, club events. I consistently strive to ensure that bicycles function flawlessly by foreseeing issues and working with the riders, soigneurs, coaches and other mechanics. Even with decades of experience as a shop mechanic and team mechanic, and continue to pursue greater involvement in this sport as a US Pro Mechanic, and UCI Pro Mechanic.
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