Best Propane Conversion Kit For Carbureted Engines

#1 · Best Overall

1. Hipa GX340/GX390 Conversion Carburetor

Best for: Tri-fuel portable generator users.

Why it ranks #1: Supports gasoline, LPG, and CNG; names Honda GX340/GX390 engines and clones, and includes a conversion carburetor, gasket, OFF setting, and manual choke.

A three-position rotary switch includes an OFF setting, letting owners select a fuel position and shut off the gas setting when the generator is not running. Hipa's kit supports gasoline, propane, and natural gas, with compatibility listed for Honda GX340 and GX390 engines and their clones.

The rotary switch provides three fuel positions, including OFF, which the product identifies as a way to prevent gas leaks. A manual choke lever is also included to support cold starts in any weather condition, so starting workflow has a dedicated control. Compatibility covers Honda GX340 and GX390 engines and clones, with named Champion generator applications as well. The stated generator output on LPG is 4.5–5.5 kW for the listed GX390 188F setup.

Skip it if you want a conversion kit specifically listed for Honda EU2200i; Hutch Mountain's EU2200i kit names that generator model.

Hipa fits owners converting a compatible GX340 or GX390 generator for gasoline, propane, or natural gas, especially where the OFF switch and manual choke suit the operating routine. Check the stated engine and generator applications before selecting it.

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 · Broadest Displacement

2. YAMAKATO Generator Carb Kit

Best for: Multi-engine generator owners.

Why it ranks #2: Lists 301–459 cc engine displacements and gasoline, LPG, and CNG conversion use; includes a manual carb kit and non-asbestos mounting gaskets.

A manual tri-fuel or dual-fuel carb kit supports gasoline-generator conversion to LPG or CNG across a listed range of 301cc to 459cc engines. YAMAKATO names Honda and clone GX-series engines and several generator families, giving owners a broad compatibility list to check against their existing carburetor and generator model.

The manual carb kit is listed for Huayi P27-3DL and Honda or clone GX 270, 340, and 390 applications, with engine displacements spanning 301cc to 459cc. That range can help owners of different-size generators assess whether the replacement matches their engine family. Non-asbestos mounting gaskets are included, providing the stated gasket components for installation. Named generator families include Generac, Westinghouse, and Firman, so buyers can compare their model against the supplied list.

Skip it if you need a kit with a stated 3-position OFF switch; Hipa's GX340/GX390 conversion kit lists one.

This kit suits generator owners whose engines match its listed GX-family, displacement, or generator-model applications and who want a manual route to LPG or CNG. Check the specific engine and generator listing; compatibility is not universal.

Listed on Amazon as: YAMAKATO 389cc 420cc Tri Dual Generator Carb Gas to LPG CNG Conversion

#3 · Warranty Included

3. KELKONG GX340/GX390 Kit

Best for: GX-series LPG and NG users.

Why it ranks #3: Targets GX270, GX340, and GX390 generator carburetor replacements across listed 301–459 cc displacements, with a carburetor, gasket, and one-year warranty.

This GX340/GX390 conversion kit is listed for LPG and natural gas use, giving owners of compatible 188F generator engines a dual-fuel alternative to a gasoline carburetor. KELKONG also names Honda and clone GX engines across several displacements, plus specific Generac and Westinghouse generator families.

The carburetor kit lists Honda and clone GX 270, 340, and 390 engines and a 301cc-to-459cc displacement range, helping buyers screen their engine family before replacing the carburetor. LPG and natural gas are the stated fuel applications, so it addresses gas conversion without claiming gasoline operation. Included components are a carburetor, damper handle, screw, and gasket, giving the installer named hardware and a gasket for the replacement workflow.

Skip it if you need a kit explicitly supporting gasoline alongside propane; Hipa's GX-series kit lists gasoline, LPG, and CNG.

Consider this KELKONG kit for a compatible GX-series or listed generator application when LPG or natural gas is the intended fuel. Its included carburetor hardware supports replacement, but gasoline operation is not among the stated fuel options.

Listed on Amazon as: GX340 GX390 Carburetor LPG/NG Dual fuel Conversion Kit 188F

#4 · 2-5 kW Generators

4. HOgardenME 2-5 kW Kit

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

Why it ranks #4: Designed for petrol generators rated 2–5 kW, it includes a pressure regulator and gas carburetor for LPG or CNG conversion.

A pressure regulator that shuts off gas when the generator stops is the key safety feature in this conversion kit for petrol generators rated from 2 to 5 kW. HOgardenME lists propane and methane CNG use while retaining the option to use the generator's original gas fuel.

The pressure regulator is specified to stop gas flow when the generator stops, helping prevent gas from entering the engine during shutdown. A gas carburetor accompanies it to provide the stated gas-supply components for conversion. The kit is intended for petrol generators in the 2–5 kW range and supports LPG propane or CNG methane while retaining the option to use gas. The product description specifies low-pressure gases, an important operating boundary for choosing a compatible supply.

Skip it if you need a kit listed for a named Honda GX engine; KELKONG's GX340/GX390 kit specifies those engine families.

This kit suits owners of 2–5 kW petrol generators seeking LPG or CNG conversion while retaining gas use. The regulator shutoff is relevant to shutdown operation, but the stated low-pressure-gas limitation must match the intended fuel supply.

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

#5 · Forklift Engines

5. D MART PARTS BP-4T Kit

Best for: Four-cylinder forklift conversions.

Why it ranks #5: Purpose-built for gasoline-powered 4-cylinder forklift and industrial engines, with a dual-stage regulator, vaporizer, vacuum lock-off, and mixer.

A dual-stage LPG regulator, vaporizer, and air-gas mixer come together for converting gasoline-powered four-cylinder forklift engines to propane. The kit specifically includes compatibility for 4Y-type industrial engines, making it a focused option for equipment owners seeking a complete set of core fuel-delivery components rather than a general-purpose generator carburetor.

The dual-stage regulator and vaporizer form the fuel-delivery side of the conversion, while the air-gas mixer handles the engine-side mixture; together, these named components provide the core set for a propane setup. Its stated fit for four-cylinder engines, including 4Y-type forklift applications, helps narrow the intended use before installation. The vacuum lock-off regulator is specified as VFF-30 type, and the mixer is similar to a CA55-271 configuration for reference, not a universal fit guarantee.

Skip it if you need a kit for a portable generator; YAMAKATO's generator carb kit lists multiple generator-engine applications.

Choose this kit for a gasoline-powered, four-cylinder forklift or industrial engine in the stated 4Y-type category. Its regulator, vaporizer, and mixer make the intended conversion clear, but the listed application is specialized rather than broadly generator-focused.

Listed on Amazon as: BP-4 TAftermarket Gasoline to Propane (LPG) Conversion Kit for 4-Cylinder Forklift Engines | Includes Regulator, Vaporizer & Mixer | Compatible with 4Y-Type Industrial Engines

#6

6. Hutch Mountain EU2200i Kit

Best for: Honda EU2200i dual-fuel users.

Why it ranks #6: A model-specific option for Honda EU2200i generators, listed for propane and gasoline use and supplied with a manual and fuel adapters.

Specifically listed for the Honda EU2200i, this Hutch Mountain kit adds propane use while retaining gasoline as a fuel option. That model-specific fit makes it a clear candidate for EU2200i owners preparing portable power for home backup, RV trips, or camping without changing to a different generator.

The propane-and-gasoline setup gives EU2200i owners two stated fuel choices for portable power, while the product information names home backup, RV use, and camping as relevant applications. The included kit components are a dual-fuel conversion kit, manual, and fuel adapters, supporting the conversion and fuel-connection workflow. Its listed electrical details are 120 volts and 2,200 watts running output. The stated EU2200i fit is the central compatibility boundary.

Skip it if you own a Honda EU3000is; Hutch Mountain's EU3000is conversion kit is listed for that generator instead.

EU2200i owners seeking propane and gasoline options for camping, RV use, or home backup are the intended buyers. The included manual and adapters support the conversion workflow, but this kit's stated fit is specific to the Honda EU2200i.

Listed on Amazon as: Hutch Mountain Generator Propane Conversion Kit for Honda EU2200i

#7

7. Grenergy EU2000i Tri-Fuel Kit

Best for: Honda inverter tri-fuel conversion.

Why it ranks #7: Designed for Honda EU2000i models and compatible Companion and EB2000i units; it includes regulator and fuel-adapter assemblies and supports three fuels.

A preset propane setup and a bolt-on installation that requires no factory-carburetor modification distinguish Grenergy's tri-fuel kit for Honda EU2000i generators. It supports propane, natural gas, and gasoline, giving owners multiple fuel choices while keeping the original carburetor unmodified according to the product details.

The kit arrives preset to run on propane, so the listed starting configuration avoids setting up the carburetor for that fuel. Its bolt-on installation and no-modification approach leave the factory carburetor untouched, a practical distinction for owners who do not want a carburetor alteration. Grenergy includes a regulator assembly and fuel-adapter assembly with quick connect. Compatibility is listed for Honda EU2000i, Companion, and EB2000i models, with EU2200i also named in the model description.

Skip it if you need a conversion for a Honda EU3000is; Hutch Mountain's EU3000is kit names that generator model.

Choose Grenergy for a listed Honda EU2000i-family generator when tri-fuel flexibility and an unmodified factory carburetor matter. Its preset propane setup and included quick-connect adapter support the stated workflow, but the compatibility list is model-specific.

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

#8

8. Hutch Mountain EU3000is Kit

Best for: Honda EU3000is dual-fuel owners.

Why it ranks #8: Fits Honda EU3000is portable generators and permits propane or gasoline use, but its model-specific generator application is less broadly applicable.

Compatibility with the Honda EU3000is lets this Hutch Mountain kit add propane alongside gasoline for owners of that specific portable generator. The two-fuel setup suits home backup, RV, and camping use, while the listed 120-volt specification identifies the generator context for buyers planning portable or household power applications.

The propane-and-gasoline fuel choice gives EU3000is owners an alternative to relying on a single fuel, while retaining the listed gasoline option. Hutch Mountain identifies home backup, RVs, and camping among the intended uses, connecting the conversion to both stationary and mobile generator routines. The product information also references a generator-to-house hookup kit for home power access. Its fit is specific to the Honda EU3000is, so the named model is central to the purchase decision.

Skip it if you own a Honda EU2200i; Hutch Mountain's EU2200i conversion kit is listed for that generator instead.

This is a fit-focused choice for Honda EU3000is owners who want propane and gasoline options for backup power, RV use, or camping. The key boundary is its named generator model, so it is not the listed choice for other Honda units.

Listed on Amazon as: Hutch Mountain Generator Propane Conversion Kit for Honda EU3000is