Best LPG Conversion Kits for Generators: A Practical Guide for Quick, Safe Fuel Switching
Answering the buyer’s search, these LPG/CNG conversion kits let you run generators on propane, natural gas, or gasoline with improved versatility and potential fuel storage benefits. This guide highlights five select options, who they’re best for, and key considerations to help you choose with confidence.
Overview at a glance:
| Product | Best For | Notes |
|---|---|---|
| YAMAKATO 389cc Tri Dual Generator Carburetor | Large displacement generators; multi-fuel flexibility | OEM-style kit; broad compatibility list |
| YAMAKATO Dual Tri Fuel Carburetor for Predator / Honda GX | Mid-size generators; quick swap between fuels | Tri-fuel carb kit with mounting gaskets |
| Grenergy EU2200i Propane & Gasoline Tri-Fuel Kit | Honda EU2000i/2050i class; easy out-of-the-box propane | No carb modifications; convenient for emergencies |
| TREASURECAVE Dual Fuel Carburetor LPG-CNG Kit | 2-5KW petrol generators; CNG or LPG use | Zero-pressure regulator included |
| KELKONG GX390 LPG/NG Conversion Kit | Predator/Honda GX390-class engines | With air filter; broad generator compatibility |
YAMAKATO 389cc Tri Dual Generator Carburetor Kit
The YAMAKATO kit supports a wide range of small-to-mid sized generators and is designed for tri-fuel operation (gasoline, LPG, LNG, or CNG) with a manual carb kit. It’s labeled OEM quality and lists compatibility across various engine displacements including 301, 337, 389, 420, 439, and 459 cc. This makes it well-suited for buyers who want a single kit capable of powering many different models, especially for users who maintain multiple generators or who plan a retrofit for different fuel availability.
Best for: Builders and homeowners with multiple generators or an engine in the 301–459 cc range who want flexible fuel options and OEM-standard components.
Limitations: The extensive compatibility list means buyers should verify exact model compatibility for their engine family and mounting layout before purchase. Some users may require additional hardware depending on their current configuration.
YAMAKATO Dual Tri Fuel Carburetor for Predator 4000 / Honda GX
This carburetor kit targets Honda GX160 class and Predator generators, offering tri-fuel capability for 196cc–224cc displacements and related engine families. It emphasizes OEM-quality construction with non-asbestos mounting gaskets. The kit also extends to certain Generac, Ai Power, Ironton, and Champion models, but with a caveat: compatibility for some Champion generators is limited to specific 196cc–224cc units. Best for users who own smaller to mid-size units and want a true tri-fuel setup without modifying the factory carb beyond the replacement kit.
Limitation: Only certain Champion models are covered; verify your exact model number and displacement to ensure fitment.
Grenergy EU2200i Propane & Gasoline Tri Fuel Kit
The Grenergy EU2200i kit is designed for Honda EU2000i-class inverters and similar units. It’s promoted as a complete, ready-to-run kit that enables propane use without carburetor modification. The kit emphasizes an alternative-fuel advantage for emergencies when gasoline may not be reliably available and highlights long-term storage benefits for propane. It’s a good pick for users prioritizing simple installation and immediate propane compatibility.
Best for: Owners of compact inverter generators who want a straightforward, no-modification propane option with reliable tri-fuel capability.
Caution: The claim of “no carburetor modification” implies a plug-and-play installation; always confirm that your exact generator model is supported by the kit’s included components.
TREASURECAVE Dual Fuel Carburetor Kit for LPG-CNG
This TreasureCave kit targets petrol generators in the 2–5 kW range, enabling safe use of LPG/propane or CNG methane alongside gasoline. It includes a zero-pressure regulator to ensure stable gas pressure and safe operation. The kit preserves the original system’s flexibility, allowing operators to switch fuel sources as needed while maintaining generator power output dependent on the engine and gas quality.
Best for: Small to medium petrol generators where a reliable dual-fuel option is desired, without sacrificing the ability to revert to gasoline.
Limitation: It’s oriented toward 2–5 kW units; check your generator’s power rating and fuel system layout before purchasing.
KELKONG GX390 LPG/NG Conversion Kit
The KELKONG kit targets GX390-class engines and similar hardware, including a broad range of GX270/340/390 displacement engines in 301–459 cc. It is designed for dual-fuel operation with LPG/NG and is intended for generators in the Generac, WH, Firman, and Champion lines. The kit is marketed with an emphasis on safety, noting a reasonable structural design to maintain safe operation under typical generator use.
Best for: Users with Predator or Honda GX-series engines who want a robust, broadly compatible dual-fuel solution with an integrated air filter inclusion.
Limitation: While compatibility is broad, verify exact engine displacement and mounting compatibility for your model to avoid fitment issues.
Buying Guide: Key Considerations For LPG Conversion Kits
- Engine compatibility: Verify displacement (cc), model family (GX270/340/390, Predator, Generac, Champion, etc.), and mounting compatibility before selecting a kit.
- Fuel flexibility vs. installation effort: Some kits require minimal modification (propane-ready, no carb changes), while others may need more extensive mounting or gasket work. Decide how much retrofit work you’re willing to perform.
- Regulation and safety features: Look for kits that include pressure regulators, gas carburetors, and non-asbestos gaskets when applicable. Check for shutoff mechanisms when the engine stops.
- Fuel availability and storage: Propane and natural gas offer storage advantages and longer shelf life under proper conditions. Consider your typical emergency fuel access and storage space.
- Performance expectations: Dual- or tri-fuel kits aim to preserve engine power output within the constraints of the chosen fuel. Ensure the kit aligns with your generator’s rated capacity.
- Maintenance and spare parts: Choose kits with readily available components (gaskets, regulators, seals) and documented installation steps to simplify future maintenance.
- Warranty and support: Evaluate whether the kit provides clear guidance on compatibility and installation, and whether the seller offers support for common installation questions.
Frequently Asked Questions
- What is a tri-fuel generator kit?
A tri-fuel kit allows a generator to run on gasoline, propane (LPG), and natural gas (CNG) using a replacement carburetor or conversion components.
- Do these kits affect generator power output?
Most kits aim to preserve effective power, but actual output depends on engine size, fuel quality, and installation quality. Follow manufacturer instructions for best results.
- Is professional installation recommended?
For safety and reliability, consult or hire a qualified technician if you’re unsure about fuel lines, regulators, or carburetor changes.
- Can I revert back to gasoline after installing a dual-fuel kit?
Many kits are designed to allow seamless switching back to gasoline, but verify the specific kit’s features and any required reconfiguration.
- Which kits are best for emergency preparedness?
Kits that work with propane or natural gas and include easy installation, robust regulators, and compatibility with common portable generators are typically best for emergencies.
- Are there safety considerations with LPG/CNG conversions?
Yes. Proper regulator setup, leak testing, secure mounting, and adherence to local codes are essential for safe operation.