Best Dual Fuel Conversion Kit For Generator: 10 Options Compared

#1 · Best Overall

1. Hutch Mountain EU2200i Kit

Best for: Honda EU2200i propane conversion.

Why it ranks #1: Made specifically for the Honda EU2200i, with a 2,200-watt running rating, fuel adapters and manual listed in the package.

A quick-start propane conversion specifically for the Honda EU2200i gives owners an alternative to gasoline while retaining the generator’s existing platform. Hutch Mountain says installation uses basic tools and can take most owners under an hour, making this a practical option for camping or residential backup when propane is preferred.

The kit’s basic-tool installation and stated setup time of under an hour help keep conversion manageable for an EU2200i owner without specialized equipment. Hutch Mountain also specifies cold starts in one to three pulls and smooth operation, useful when setting up portable power at a campsite or during an outage. Included fuel adapters and a manual support the installation workflow. Its listed fit is narrow, however: the product is identified for the Honda EU2200i, not a general-purpose generator carburetor.

Skip it if you own a different generator; Hipa’s GX340/GX390 kit covers a broader range of listed engine families.

Choose this for a Honda EU2200i owner seeking portable propane power for camping or residential use, especially if a basic-tool installation matters. Its specific EU2200i fit makes generator compatibility the key boundary.

Listed on Amazon as: Generator Dual-Fuel Conversion Kit for Honda EU2200i

#2 · Best Welder Fit

2. Impco Onan P220G-I Kit

Best for: Onan P220G welder generators.

Why it ranks #2: A complete dual-fuel kit for the Miller Bobcat welder generator with Onan P220G-I/11592H, designed for propane or gasoline.

A direct connection to a liquid forklift tank distinguishes this Impco dual-fuel kit for the listed Miller Bobcat welder generator and Onan P220G-I/11592H. It lets the compatible generator run on propane or gasoline, making it a specialized option for commercial users already working with that tank arrangement.

The complete conversion kit is identified for the Miller Bobcat welder generator and Onan P220G-I/11592H, giving it a focused application rather than broad engine-family coverage. Its direct connection to a liquid forklift tank supports a specific propane supply workflow, while gasoline remains the other stated fuel. The generic parts description confirms a liquid-propane conversion kit, so this is most relevant where that tank setup is appropriate. The product’s narrow model and fuel arrangement should guide compatibility decisions.

Skip it if you need a low-pressure natural-gas inlet for a DuroMax XP12000EH; the Generic XP12000EH kit specifies that conversion.

This suits commercial owners of the listed Miller Bobcat or Onan P220G-I/11592H setup who can use a liquid forklift tank. Its specialized application and tank connection are important fit boundaries.

Listed on Amazon as: Impco Propane Conversion Kit Miller Bobcat Welder Generator Onan P220G-I/11592H

#3 · Three-Fuel Support

3. Hipa GX390 Conversion Kit

Best for: Multi-fuel GX engine conversion.

Why it ranks #3: Supports gasoline, propane and natural gas, with compatibility listed for Honda GX340/GX390 and several Champion engine sizes.

Three fuel choices—gasoline, propane, and natural gas—set this Hipa conversion apart for compatible generator owners who want options as supply changes. Its 3-position rotary switch includes an OFF setting, while the manual choke lever supports cold starts, combining fuel flexibility with controls suited to practical operation.

The stated gasoline, LPG, and CNG capability gives compatible generator owners more than a propane-only conversion route. A 3-position rotary switch with OFF setting provides a direct way to select or shut off the fuel system, and the manual choke lever is specified for reliable cold starts in any weather condition. Listed compatibility includes Honda GX340 and GX390 engines and clones, plus named Champion engine sizes. The broad title should not substitute for checking the particular generator’s engine family.

Skip it if you need a conversion specifically for a Honda EU2200i; Hutch Mountain’s EU2200i kit is the specifically identified match.

This suits owners of listed GX340/GX390-family generators who value gasoline, propane, and natural-gas choices. The manual choke and fuel selector are useful controls, but the engine-family compatibility is the deciding fit boundary.

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

#4 · Broad Engine Range

4. YAMAKATO GX Carb Kit

Best for: Broad GX clone carburetor replacement.

Why it ranks #4: Lists Honda and clone engines from 301cc to 459cc and numerous generator families; package includes non-asbestos mounting gaskets.

Coverage across listed 301–459 cc Honda and clone engines makes this YAMAKATO manual carb kit a broad replacement option for owners converting generator fuel systems. Its stated LPG, LNG, and CNG use, along with non-asbestos mounting gaskets, addresses both alternative-fuel flexibility and a practical part needed during carburetor installation.

The listing names Honda and clone GX270, GX340, and GX390 families across several engine displacements, plus specific Generac, Westinghouse, and Firman models. That breadth can help owners of those generators source a replacement carburetor and conversion components together. The kit includes non-asbestos mounting gaskets, supporting the carburetor mounting workflow, and is described for natural gas, LPG, LNG, and CNG conversion. Since the fit list is extensive but model-specific, matching the engine and generator remains essential.

Skip it if you want a specifically described 3-position fuel selector and manual choke; Hipa’s GX340/GX390 kit lists both controls.

This is aimed at owners replacing a carburetor on a listed Honda or clone generator and seeking multiple gas-fuel options. Its broad model list helps, but the exact engine and generator match remains decisive.

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

#5 · Useful Included Parts

5. AUTOKAY GX390 Carb Kit

Best for: GX390 kit with air-filter parts.

Why it ranks #5: Targets GX390 188F generators and lists a 5,000-watt rated, 5,500-watt maximum output plus filter, spark plug and gaskets.

A GX390 188F conversion package that includes an air filter, gasoline filter, spark plug, heat-insulation board, and gaskets gives this AUTOKAY kit a parts-rich installation profile. Its stated 5,000-watt rated and 5,500-watt maximum output figures identify the generator class the listing associates with the carburetor.

The package combines the carburetor with an air filter, gasoline filter, spark plug, heat-insulation board, and four gaskets, consolidating several replacement parts for the conversion workflow. Its stated GX390 188F generator type and 4.5–6 kW fit range give owners a practical starting point for compatibility checks. The listing also names Honda GX340/GX420 and Champion applications. Rated output is 5,000 watts and maximum output is 5,500 watts, figures that describe the listed generator context rather than a guaranteed conversion result.

Skip it if you need a small 208–212 cc generator carburetor; Zreneyfex’s 170G-GX200 kit lists those engine sizes.

This package suits owners of listed GX390-family generators who want several related replacement parts included with the conversion carburetor. Check the engine and 4.5–6 kW application range before settling on it.

Listed on Amazon as: AUTOKAY Dual Fuel Carburetor LPG NG Conversion Kit for Gasoline Generator 4.5-5.5KW GX390 188F Carburetor with Air Filter and Spacer Insulator

#6

6. FWYWNL GX390 Carb Kit

Best for: GX-family LPG and natural gas.

Why it ranks #6: Covers Honda and clone GX270/GX340/GX390 engine families and lists multiple Generac, Firman and Champion generator models.

A wide stated GX-family displacement range gives this FWYWNL carburetor conversion relevance to owners of numerous Honda-clone generator engines. The listing also names several Generac, Westinghouse, Firman, All Power, and Champion models, making its compatibility roster the main practical differentiator for LPG and natural-gas conversion shoppers.

The listed 182F–192F and 301–459 cc engine families, alongside named GX270, GX340, and GX390 applications, give buyers several ways to assess fit. Specific Generac and other generator models are also identified, which can help narrow a replacement-carburetor search. The product is labeled LPG/NG, supporting propane and natural-gas conversion use, while the included component is described as the GX390 LPG/NG carburetor. Because the data spans many configurations, matching the actual engine and model is important.

Skip it if you need a listed 4.5–5.5 kW GX390 kit supplied with an air filter; AUTOKAY’s M700509 includes one.

Choose this when your generator matches one of its listed GX-family engines or named models and LPG/NG operation is the goal. The broad compatibility claims make exact engine identification the main boundary.

Listed on Amazon as: GX390 LPG/NG Generator Carburetor Dual Fuel Conversion Kit for Predator 188F 190F 8500 8750 7000 9000 Generator Replace for Honda GX270 GX340 389cc 420cc Engine

#7

7. Zreneyfex GX200 Carb Kit

Best for: Compact GX200 generator conversion.

Why it ranks #7: A narrower option for 208cc, 210cc or 212cc GX200/170F generators, with listed 2,800-watt rated and 3,500-watt maximum output.

For 208–212 cc GX200 or 170F portable generators, this Zreneyfex carburetor kit is specified at 2,800 watts rated and 3,500 watts maximum output. Its included carburetor, three gaskets, and choke lever support a straightforward replacement workflow for owners of this smaller generator class.

The stated replacement fit for Tonco GX200/170F portable gasoline generators and 208–212 cc engines gives buyers a defined compatibility target. The package includes the carburetor, three gaskets, and a choke lever, supplying several installation pieces together instead of separating them. Listed output is 2,800 watts rated and 3,500 watts maximum, useful for identifying the generator class described. These figures and the named engine fit make this a narrower choice than kits aimed at larger GX390 applications.

Skip it if you need a GX390 conversion for a 4.5–5.5 kW generator; AUTOKAY’s M700509 lists that application and includes an air filter.

This fits owners of the listed GX200/170F portable generator class seeking a replacement carburetor kit with gaskets and choke lever. The 208–212 cc application and output figures define its boundary.

Listed on Amazon as: GX200 Carburetor Dual Fuel Carb Conversion Kits Replacemant for Honda 170F Generator LPG/CNG Gasoline Carb Assembly

#8

8. TreasureCave 2–5 kW Kit

Best for: Low-pressure LPG and CNG generators.

Why it ranks #8: Designed for 2–5 kW petrol generators and low-pressure propane or methane, but the listed compatibility details are less specific.

A zero-pressure regulator paired with a gas carburetor lets compatible 2–5 kW petrol generators use propane or methane while retaining the original system. The listing says generator output remains unchanged after conversion, subject to generator and gas quality, making this a gas-fuel option for owners who want to preserve their existing setup.

The included zero-pressure regulator and gas carburetor work together to provide stable gas pressure, which the listing links to safe operation. Support for low-pressure domestic propane or methane gives a compatible petrol generator two gas-fuel routes alongside its original system. The stated 2–5 kW range helps narrow the intended generator class, while the output claim is conditional on generator and gas quality. This is not presented as a high-pressure gas conversion, so supply type is a material fit consideration.

Skip it if you need an explicit natural-gas conversion for a DuroMax XP12000EH; the Generic XP12000EH kit states its inlet pressure range.

Consider this for a 2–5 kW petrol generator when low-pressure propane or methane is available and preserving the original system matters. Its stated gas-pressure limitation is central to whether it fits.

Listed on Amazon as: Dual fuel carburetor LPG-CNG conversion kit for Petrol Generators 2-5KW manual choke to Use Methane CNG/Propane LPG-Gas

#9

9. Generic WGEN9500DF Kit

Best for: WGEN9500DF propane conversion.

Why it ranks #9: Lists propane and gasoline support for the WGEN9500DF with a maximum inlet pressure of 13.86 inches WC, but limited fit detail.

A built-in overcurrent protection device that cuts off gas when abnormal airflow is detected is the key safety feature in this WGEN9500DF-focused conversion. The kit supports low-pressure propane and gasoline, with a stated maximum inlet pressure of 13.86 inches water column, making supply pressure and generator fit central considerations.

The named WGEN9500DF application gives owners a specific generator target, while low-pressure propane and gasoline support two operating fuel choices. Its stated maximum inlet pressure of 13.86 inches water column helps define the required gas-supply conditions. The built-in device is described as cutting off gas when abnormal airflow is detected, adding an automatic response to that condition. The listing also describes a high-precision pressure regulator that adapts to tank-pressure changes, supporting stable output air pressure for the stated fuel setup.

Skip it if you want a reversible natural-gas conversion for a DuroMax XP12000EH; the Generic XP12000EH kit retains gasoline and stock propane use.

This is for WGEN9500DF owners seeking gasoline and low-pressure propane capability with an airflow-triggered gas cutoff. The stated inlet-pressure ceiling and named generator application are the key fit boundaries.

Listed on Amazon as: NF-GEN-KIT-710-DFNV-WGEN9500DF Dual fuel conversion kit – for generator supports low-pressure propane gasoline Max inlet pressure 13.86" WC 0.5psi simple installation long-lasting fuel solution

#10

10. Generic DuroMax XP12000EH Kit

Best for: DuroMax XP12000EH natural gas.

Why it ranks #10: Converts the XP12000EH for low-pressure natural gas only; it is not a general dual-fuel conversion kit for other generator models.

Using the carburetor’s existing port for its natural-gas inlet lets this kit add low-pressure natural gas to a DuroMax XP12000EH without permanent modification. Owners can retain gasoline operation and return to the stock propane hose, so the conversion offers a reversible fuel change rather than replacing the generator’s original setup.

The existing carburetor port is the natural-gas connection point, avoiding a permanent modification according to the listing. That reversible approach preserves gasoline use, and the stated switch back to propane is simply to reconnect the stock propane hose. The kit is specified for low-pressure natural gas and an inlet pressure of 9–13.8 inches water column. Those pressure and model limits make it most relevant to XP12000EH owners whose gas supply matches the stated range.

Skip it if you need gasoline, propane, and natural gas on a GX390-family generator; Hipa’s GX340/GX390 tri-fuel kit lists all three.

A DuroMax XP12000EH owner seeking reversible low-pressure natural-gas capability is the clear buyer. Keep the stated 9–13.8 inches water-column inlet range and single-model fit in view before choosing it.

Listed on Amazon as: Natural Gas Conversion Kit Compatible with Duromax XP12000EH Generator