Best Gasoline To Propane Conversion Kit For Generator

#1 · Best Overall

1. Hipa GX390 Tri-Fuel Carburetor

Best for: Multi-fuel GX390 owners.

Why it ranks #1: Supports gasoline, LPG, and CNG; lists GX340/GX390 engines and clones plus named Champion models, with a manual choke and included conversion parts.

A three-position fuel selector gives this Hipa kit a practical edge: it lets compatible generators switch among gasoline, propane, and natural gas, with an OFF position to shut off the gas supply. Its manual choke lever also supports cold starts across changing weather conditions.

The kit targets Honda GX340 and GX390 engines and compatible clones, with listed fits for several Champion generator sizes and Predator 700. That compatibility makes it relevant to owners matching those engine families rather than seeking a universal carburetor. The three-position rotary switch handles fuel selection and has an OFF setting, while the manual choke gives the operator control for cold starts. Included components are a dual-fuel carburetor, gasket, and LPG/CNG conversion kit; listed LPG output is 4.5–5.5 kW.

Skip it if you own a Honda EU3000is; Hutch Mountain’s EU3000is-specific kit is the more directly matched option.

Choose this for backup power or camping when your generator uses a listed GX-series engine or compatible model and you want three fuel choices. Check the engine family against the stated fit before planning installation.

Listed on Amazon as: HIPA 389cc 420cc Tri Dual Generator Carburetor Propane Conversion kit for Champion Predator Generac Honda OHV Engine 338cc 389cc 420cc 460cc GX340 GX390 GX420 GX460 Portable Generator

#2 · Best EU3000is Fit

2. Hutch Mountain EU3000is Kit

• Wattage: 3000 W
• Output Wattage: 2000 W

Best for: Honda EU3000is conversion.

Why it ranks #2: Made specifically for the Honda EU3000is and lists gasoline, propane, and natural gas conversion options; the kit includes related parts.

Straightforward installation with basic tools is the key draw of Hutch Mountain’s EU3000is kit, enabling many owners to complete setup in under an hour. It also supports gasoline, propane, and natural gas, so this generator-specific conversion offers fuel flexibility for camping and residential backup.

This kit is specifically for the Honda EU3000is, making generator model the central fit consideration. Its basic-tool installation and stated setup time of under an hour offer a relatively direct conversion workflow for owners of that model. The listed components support gasoline, propane, and natural gas operation, while the product information describes cold starts in one to three pulls and smooth operation. Its 120-volt specification and listed 2,800-watt running wattage help frame the generator context, rather than suggesting a different output class.

Skip it if you own a Honda EU2000i or EU2200i; Grenergy’s EU2000i kit is specified for those Honda inverter models.

This suits Honda EU3000is owners seeking a three-fuel conversion for camping or residential use, especially those who value a basic-tool setup. Its model-specific fit makes it unsuitable as a general-purpose kit for other generators.

Listed on Amazon as: Generator Dual-Fuel Conversion Kit for Honda EU3000is

#3 · Best EU2000i Fit

3. Grenergy EU2000i Tri-Fuel Kit

• Wattage: 1800 W
• Output Wattage: 1800

Best for: Honda EU2000i tri-fuel users.

Why it ranks #3: Lists Honda EU2000i compatibility, including serial model EAAJ-2017306 or lower, and includes regulator and fuel-adapter assemblies with quick connect.

A propane-preset setup lets the Grenergy kit arrive ready for propane operation, enabling a simpler start for owners converting a compatible Honda inverter generator. It also supports gasoline and natural gas, and the kit states that it bolts on without modifying the factory carburetor.

The stated fit covers Honda EU2000i models, including serial number EAAJ-2017306 or lower, as well as the Companion and EB2000i. Because the kit comes preset for propane and requires no factory-carburetor modification, the conversion workflow avoids altering that original component. Its included regulator assembly and fuel-adapter assembly with quick connect support the fuel connection setup. At a listed 1,800 watts and 120 volts, it is aimed at the output class of the specified inverter generators, not larger units.

Skip it if you own a Honda EU3000is; Hutch Mountain’s EU3000is conversion kit matches that larger specified model.

A good match for owners of the listed Honda EU2000i, Companion, or EB2000i models who want tri-fuel flexibility without changing the factory carburetor. Keep its 1,800-watt specification and model coverage in mind.

Listed on Amazon as: EU2000i Propane, Natural Gas & Gasoline Tri Fuel Conversion Kit for Honda Generator Inverter LPG CNG

#4 · Best Predator Fit

4. Cirecsiy Predator 3200/4000W Kit

• Wattage: 3200 W
• Output Wattage: 4000 W

Best for: Predator 3200W and 4000W owners.

Why it ranks #4: Targets Predator 3200W or 4000W generators and supports gasoline, propane, and natural gas; the listing names a regulator, hose, clamps, and fittings.

A supplied regulator, fuel hose, clamps, and fittings make this Cirecsiy kit a more complete conversion package for Predator 3200W and 4000W generators. It enables those gasoline portable generators to run on propane or natural gas while retaining gasoline as a fuel option.

Compatibility is specifically stated for Predator 3200W or 4000W portable generators, giving owners of those models a clear starting point for assessing fit. The included carburetor adapter, regulator, fuel hose, clamps, and required fittings support the fuel-system conversion without sourcing those listed connection parts separately. Tri-fuel operation preserves gasoline while adding propane and natural gas, a useful choice for home backup, camping, RV power, or off-grid use. The stated wattage range keeps the kit focused on those Predator generator classes.

Skip it if you own a Honda EU2000i; Grenergy’s EU2000i-specific kit lists that inverter model and its Companion and EB2000i variants.

This fits Predator 3200W and 4000W owners who want fuel flexibility for backup power, RV use, or outdoor settings. Its stated compatibility is narrow, so it is not a general kit for other generator models.

Listed on Amazon as: Propane Conversion Kit for Predator 3200/4000W Generator – Tri‐Fuel LPG/NG Carburetor Adapter for Gasoline Portable Generator

#5 · Best GX160 Range

5. Toolyuan GX160 Carburetor Kit

Best for: GX160 and Predator 212 owners.

Why it ranks #5: Names GX160/GX200 and Predator 212cc compatibility, plus Duromax XP4400EH and XP4850EH; its stated rated output range is 2KW to 2.8KW.

Broad small-engine compatibility is the defining feature of this Toolyuan carburetor kit, which lists Honda GX160/GX200 and Predator 212cc applications. It enables gasoline generators in that engine range to use LPG or natural gas as well, with a stated rated output of 2–2.8 kW.

The listed fit spans GX160, GX200, 168F, and 170F engines, plus Harbor Freight Predator 212cc engines and specified Duromax models. That breadth helps owners identify a compatible small-engine generator across several named platforms, though the engine and model match remains essential. The kit supports gasoline with LPG or natural gas conversion, offering fuel alternatives while retaining gasoline use. Its 2–2.8 kW rated output sets the stated power range, so it is not presented for larger generator classes.

Skip it if you have a 3,200W or 4,000W Predator; Cirecsiy’s kit specifically lists those generator models.

Consider this for a smaller generator using one of its listed engine families when LPG or natural gas operation is needed alongside gasoline. The 2–2.8 kW rating and named fit list define its practical boundaries.

Listed on Amazon as: GX160 Dual Fuel Carburetor LPG NG Conversion Kit for Hon-da GX160 GX200 2KW – 2.8KW 168F 170F 6.5HP 7.5HP Harbor Freight Predator 212cc 4000 63962 4375 Portable Gasoline Generator

#6

6. IDEASHIP EU2200i Tri-Fuel Kit

• Wattage: 1800 W
• Output Wattage: 1800 W

Best for: EU2200i emergency power.

Why it ranks #6: Specifically names Honda EU2200i compatibility and gasoline, propane, and natural gas operation, with a stated 1800-watt output.

Three fuel options—propane, natural gas, and gasoline—give this IDEASHIP kit flexibility for Honda EU2200i owners facing changing fuel availability. Its stated 1,800-watt output places the conversion in a compact generator power class relevant to family emergencies, RV use, and camping.

The product description identifies compatibility with the Honda EU2200i and presents the kit for emergency situations, RVs, and camping. Its three listed fuels let an owner choose among gasoline, propane, and natural gas according to what is available. The 1,800-watt output specification is useful for setting expectations about the generator class this conversion serves. Included components are described as a generator propane conversion kit, but the supplied facts do not detail installation steps or individual connection parts.

Skip it if you own a Honda EU3000is; Hutch Mountain’s EU3000is kit is specified for that generator model.

Consider this for Honda EU2200i owners who value three fuel choices for camping, RV use, or family emergency preparedness. The 1,800-watt rating and model-specific compatibility are the key boundaries to check.

Listed on Amazon as: EU2200i Propane, Natural Gas and Gasoline Tri Fuel Conversion Kit, Compatible with Honda Eu2200i Generator, 3 Year Warrnaty, Suitable for Family Emergencies, RVs and Camping

#7

7. Nashfuel GP7500E Kit

• Wattage: 12500 W
• Output Wattage: 12500 W

Best for: GP7500E commercial conversions.

Why it ranks #7: Targets the GP7500E and lists low-pressure propane, natural gas, and gasoline operation; its stated output is 12,500 watts.

A venturi adapter that bolts between the carburetor and air cleaner is the key installation feature of this Nashfuel kit, enabling alternative-fuel conversion without modification on most units. It is specified for the GP7500E and supports low-pressure propane, natural gas, and gasoline.

The GP7500E model designation gives owners of that generator a specific fit reference, while the venturi design is described as suitable for installation without modification on most units. The adapter’s position between the carburetor and air cleaner explains where it enters the intake workflow. This complete, low-pressure kit supports propane and natural gas alongside gasoline, giving commercial-use buyers multiple fuel options. Its listed 12,500-watt specification places it in a substantially higher output class than small inverter-generator conversions.

Skip it if you need high-pressure propane compatibility; Nashfuel’s GP8000E kit explicitly supports high-pressure propane as well as low-pressure fuels.

This suits GP7500E owners seeking a low-pressure alternative-fuel conversion for commercial use. The venturi installation approach and listed output are useful fit cues, but high-pressure propane operation is not stated for this kit.

Listed on Amazon as: Propane Natural Gas Generator Conversion Generic GP7500E GP7500 Alternative Fuel

#8

8. Nashfuel GP8000E Kit

• Wattage: 13.8 W
• Output Wattage: 13.8 W

Best for: GP8000E multi-pressure users.

Why it ranks #8: Names the GP8000E and supports high- or low-pressure propane, low-pressure natural gas, and gasoline through a venturi adapter.

Support for high-pressure propane alongside low-pressure propane and natural gas distinguishes this Nashfuel GP8000E kit, enabling several gas-supply arrangements plus gasoline operation. Its venturi adapter is described as bolting between the carburetor and air cleaner without modification on most generators.

The GP8000E designation provides a specific model reference, while the kit’s fuel list covers high-pressure propane, low-pressure propane, low-pressure natural gas, and gasoline. That range offers operating flexibility across different stated gas pressures. The venturi adapter fits between the carburetor and air cleaner, a defined placement that helps explain the conversion’s installation path; the design is described as requiring no modification on most units. If the included regulator is not used, the stated maximum inlet pressure is 13.8 inches water column.

Skip it if you own a CAT RP6500; GENERIC’s CAT RP6500 kit is the specifically named conversion option.

Choose this for GP8000E owners who need the stated high-pressure propane option as well as low-pressure fuels and gasoline. Note the 13.8-inch-water-column limit when operating without the included regulator.

Listed on Amazon as: Tri-Fuel Propane Natural Gas Generator Conversion Generic GP8000E GP8000 Green

#9

9. Nashfuel CAT RP6500 Kit

Best for: CAT RP6500 tri-fuel owners.

Why it ranks #9: Specifically fits the CAT RP6500 listing and allows high- or low-pressure propane, low-pressure natural gas, or gasoline using a venturi adapter.

Specific compatibility with the CAT RP6500 makes this GENERIC-branded kit a focused tri-fuel option, enabling gasoline, propane, or natural gas operation. Its venturi adapter is described as fitting between the carburetor and air cleaner without modification on most units.

The title identifies the CAT RP6500 as the target generator, giving buyers a clear model to check before conversion. The kit supports high-pressure propane, low-pressure propane, low-pressure natural gas, and gasoline, offering multiple fuel choices for commercial use. Its venturi adapter bolts between the carburetor and air cleaner, and the described design avoids modification on most generators. Without the included regulator, the stated maximum inlet pressure is 13.8 inches water column, an important limit for selecting a gas supply setup.

Skip it if you need a GP8000E-specific conversion; Nashfuel’s GP8000E kit explicitly names that generator model.

This is a focused choice for CAT RP6500 owners seeking gasoline, propane, and natural-gas capability. The venturi placement and stated pressure limit matter when evaluating installation and the intended gas supply.

Listed on Amazon as: Propane/Natural Gas Tri-Fuel Conversion Kit Fits CAT RP6500 Generator

#10

10. HOgardenME 2–5KW Conversion Kit

Best for: Two-to-five-kilowatt generators.

Why it ranks #10: Covers petrol generators in a broad 2–5KW range and includes a pressure regulator and gas carburetor, but gives no named engine or generator fit.

A pressure regulator that shuts off gas when the generator stops is the practical differentiator of this HOgardenME kit, helping prevent continued gas supply to the engine after shutdown. It is specified for 2–5 kW petrol generators and supports propane or methane CNG operation.

The stated 2–5 kW range helps owners screen whether their petrol generator falls within the kit’s intended power class. A gas carburetor and pressure regulator are included, and the regulator is described as shutting off gas when the generator stops. That feature connects the conversion to a clear shutdown workflow rather than leaving gas flowing after operation. The kit is specified for low-pressure gases and supports LPG propane or CNG methane, while retaining the generator’s gasoline option.

Skip it if you need a kit for a named Honda inverter model; Grenergy’s EU2000i kit explicitly lists Honda EU2000i compatibility.

This is a candidate for owners of 2–5 kW petrol generators seeking low-pressure propane or CNG operation with an automatic gas shutoff at shutdown. Its low-pressure-gas restriction is an important operating boundary.

Listed on Amazon as: Conversion Kits For Petrol Generators 2-5KW, For LPG Propane Or CNG Methane Gas Generators Conversion Kit