Best Propane Conversion Kit For Carbureted Engines

#1 · Best Overall

1. Hipa GX390 Tri-Fuel Kit

Best for: Three-fuel generator conversion.

Why it ranks #1: Lists gasoline, propane and natural gas operation, a manual choke and compatibility with Honda GX340/GX390 engines and several Champion generator models.

A three-position rotary switch gives this Hipa kit a clear way to select OFF, gasoline, propane, or natural gas operation. That fuel flexibility suits backup power and camping setups where the available supply can change, while the OFF setting helps prevent gas leaks when the generator is not in use.

The kit is specified for Honda GX340 and GX390 engines and clones, with listed Champion generator compatibility across several engine sizes. Its manual choke lever supports cold starts in different weather conditions, while the rotary switch provides an OFF position as well as fuel selection. The included carburetor, gasket, and conversion components make this a replacement-and-conversion package for compatible portable generators; check the engine and generator model against the supplied compatibility list before choosing it.

Skip it if you have a GX160 or GX200 engine; the Toolyuan GX160 kit lists those smaller engine families.

Choose this Hipa kit for backup power or camping with a compatible GX340/GX390-family generator when access to multiple fuels matters. Its engine-specific fit makes the listed compatibility details an important 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

#2 · Best Included Parts

2. AUTOKAY GX390 Carburetor Kit

Best for: GX390 kit with replacement parts.

Why it ranks #2: Targets GX390 188F generators and lists 4.5–5.5 kW rated output, with an air filter, gasoline filter, spark plug, insulator and gaskets.

An included air filter, gasoline filter, spark plug, heat-insulation board, and four gaskets distinguish this AUTOKAY GX390 conversion package. It targets 4.5–5.5 kW GX390/188F portable generators and lists LPG/NG operation, pairing fuel conversion with several replacement components.

AUTOKAY lists a 5000-watt rated output and 5500-watt maximum output for GX390/188F generator use, plus compatibility references for GX340 and GX420 engines and selected Champion models. The supplied air filter, gasoline filter, spark plug, insulation board, and gaskets give buyers several associated service parts alongside the carburetor. That package can support a broader replacement workflow, while the stated engine families and output figures remain the key fit boundaries.

Skip it if you need a listed Honda EU2200i conversion; the Hutch Mountain kit specifically names that generator.

This AUTOKAY package suits owners servicing a compatible GX390/188F-family generator who want conversion hardware and several replacement parts together. Check the stated engine and output range against your generator before treating it as a fit.

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

#3 · EU2200i Specific

3. Hutch Mountain EU2200i Kit

Best for: Honda EU2200i propane conversion.

Why it ranks #3: Designed for the Honda EU2200i and includes fuel adapters; listed output is 2200 watts, making its stated fit more focused than general GX kits.

An installation using basic tools that most owners can complete in under an hour makes the Hutch Mountain kit approachable for Honda EU2200i owners. It adds propane operation to that specific generator, with listed quick cold starts of one to three pulls and smooth operation.

The kit is made for an existing Honda EU2200i and includes the dual-fuel conversion kit, manual, and fuel adapters. Straightforward basic-tool installation helps keep setup within the stated under-an-hour timeframe for most owners, while the listed one-to-three-pull cold starts address restart workflow. Its 120-volt, 2200-watt running output identifies the generator class, so this is a focused conversion rather than a fit for unrelated engine platforms.

Skip it if you need a kit for GX390 engines; the Hipa GX390 kit lists that engine family.

This Hutch Mountain kit suits Honda EU2200i owners who want a propane conversion with a basic-tool installation and included manual. Its generator-specific fit is the boundary, so it is not intended for other Honda engine families.

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

#4 · Small-Engine Fit

4. Toolyuan GX160 Carburetor Kit

Best for: Compact GX160-family generators.

Why it ranks #4: Lists GX160/GX200, 168F/170F and Predator 212cc compatibility, plus gasoline, LPG and natural-gas operation for 2–2.8 kW generators.

A stated 2–2.8 kW output range makes this Toolyuan conversion kit a targeted option for smaller generator setups. It supports gasoline alongside LPG or natural gas, giving owners of compatible GX160-family engines fuel choices without stepping outside the kit’s listed output class.

Toolyuan lists Honda GX160 and GX200, 168F and 170F engines, plus the Predator 212cc horizontal OHV engine and selected Duromax generators. Those specific fit references help narrow the choice to smaller portable-generator platforms, while the gasoline/LPG/NG conversion options allow operation across three fuel types. The stated 2–2.8 kW rated output is the relevant capacity boundary: this kit is not presented as a conversion for larger generator classes.

Skip it if you need a conversion for a GX390-family generator; the AUTOKAY GX390 kit lists that engine class.

This Toolyuan kit suits owners converting a compatible lower-output GX160-family portable generator for varied fuel availability. Keep the stated 2–2.8 kW range and the specific engine list in view when deciding whether it fits your setup.

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

#5

5. HAISHINE GX160 Dual-Fuel Kit

Best for: Quick GX160/GX200 replacement.

Why it ranks #5: Lists Honda GX160/GX200 and Chinese 168F/170F fit for 2–3 kW engines, with LPG/CNG and gasoline conversion stated.

A stated replacement process that takes only a few minutes is the practical draw of this HAISHINE conversion assembly. It targets Honda GX160/GX200 and Chinese 168F/170F generator engines, adding LPG or CNG capability while keeping gasoline in the listed fuel options.

The fit references focus on 5.5HP and 6.5HP GX160/GX200 engines and their 168F/170F counterparts, which helps owners of that generator class narrow the application. The assembly supports LPG/CNG alongside gasoline, while the description emphasizes easy replacement and maintenance. Those details make the kit relevant to a straightforward carburetor swap and fuel conversion, but the supplied compatibility information is centered on these small-engine families rather than larger generator platforms.

Skip it if you are converting a GX390 generator; the AUTOKAY GX390 kit lists that larger engine family.

This HAISHINE assembly fits owners seeking a quick replacement and LPG/CNG conversion for a listed GX160/GX200-class generator. Its stated engine range is the key boundary, so it is not a general-purpose kit for every carbureted engine.

Listed on Amazon as: Carburetor Dual Fuel Conversion Kit For Honda GX160 GX200 168F 170F 2KW-3KW Generator Engine LPG/CNG Gasoline Carb Assembly

#6

6. YAMAKATO GX160 Tri-Fuel Carburetor

Best for: Small-engine multi-model coverage.

Why it ranks #6: Covers GX160/GX200 and clone engines from 196cc to 224cc, and lists compatibility with multiple generator brands and models.

Compatibility spanning 196–224cc engines gives the YAMAKATO kit a broad small-generator fit range. Its tri-fuel carburetor format adds fuel flexibility to listed Honda and clone GX160/200 platforms, while the included non-asbestos mounting gaskets address a practical part of replacement installation.

The compatibility list covers GX160/200 displacement families and 168F/170F engines, with named generator examples including Generac GP1800, GP3250, GP3300, and GP3600. That combination helps buyers compare both engine and generator model references before replacing a carburetor. Non-asbestos mounting gaskets are included, so the package supplies those installation pieces alongside the carburetor. The listing also identifies gasoline-generator conversion to natural gas, making the stated fuel use and fit range the key selection boundaries.

Skip it if you need named 22R truck-engine hardware; the Impco 22R kit is specifically listed for that engine.

Consider YAMAKATO for a compatible small generator when its GX160/200 engine coverage and included gaskets match your replacement needs. Its fit is defined by the listed engine and generator families, so use those references as the boundary.

Listed on Amazon as: Dual Tri Fuel Carburetor for Predator 4000 4375 Honda GX160

#7

7. FWYWNL GX390 LPG/NG Kit

Best for: Broad GX270–GX390 generator fit.

Why it ranks #7: Lists GX270/GX340/GX390-family engines from 301cc to 459cc and multiple generator models, but supplied specifications give limited installation detail.

Coverage across GX270, GX340, and GX390 engine families gives this FWYWNL carburetor kit a wide listed range for larger generator platforms. It supports LPG or natural-gas conversion and names numerous Generac, Firman, Champion, and other generator models for fit reference.

The listing spans 182F through 192F and several displacement sizes, including 301–459cc, with named generator examples from Generac and Champion among others. This breadth helps owners compare engine and generator references when selecting a replacement carburetor. LPG/NG conversion is the stated fuel focus, while the description also calls out stability and safety during operation. Because the compatibility list is extensive and model-specific, use its named engine and generator references as the fit boundary.

Skip it if you need a kit specifically for a Honda EU2200i; the Hutch Mountain EU2200i kit lists that generator.

Consider FWYWNL for a larger generator when its listed GX270–GX390 engine coverage and LPG/NG use match your setup. The long compatibility list is useful, but the specific engine and generator references define the fit.

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

#8

8. HOgardenME 2–5 kW Kit

Best for: Low-pressure LPG or CNG generators.

Why it ranks #8: Offers propane or CNG conversion for petrol generators rated 2–5 kW and includes a pressure regulator and gas carburetor, but no engine-specific fit list.

A pressure regulator that shuts off gas when the generator stops is the key safety feature of this HOgardenME kit. It targets petrol generators in the 2–5 kW range and supports propane or methane conversion, while retaining the option to use gasoline.

The package includes a pressure regulator and gas carburetor, linking gas delivery control with the engine’s conversion hardware. The regulator is described as stopping supply when the generator stops and preventing gas from entering the engine, a practical operating safeguard. HOgardenME specifies a 2–5 kW generator range and low-pressure gases, so both output class and gas pressure are essential fit boundaries for choosing this kit.

Skip it if you need a named Predator 3200/4000W kit with hose and fittings; the Cirecsiy kit lists those components.

This HOgardenME kit suits owners converting a 2–5 kW petrol generator to low-pressure propane or methane while retaining gasoline use. The gas-pressure requirement and generator output range are important boundaries for selecting it.

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

#9

9. Cirecsiy Predator 3200/4000W Kit

Best for: Predator 3200/4000W fuel flexibility.

Why it ranks #9: Targets Predator 3200W/4000W generators and includes an adapter, regulator, hose, clamps and fittings for propane or natural gas conversion.

The included carburetor adapter, regulator, hose, clamps, and fittings give this Cirecsiy kit a defined conversion package for Predator 3200W and 4000W generators. It enables gasoline, propane, or natural-gas operation, offering flexibility for home backup, camping, RV, and off-grid use.

Cirecsiy specifies compatibility with Predator 3200W/4000W portable generators and lists tri-fuel operation across gasoline, LPG, and natural gas. The included adapter, regulator, fuel hose, clamps, and fittings support a more complete fuel-system conversion workflow than an adapter alone. Its listed output figures are 3200 watts starting and 4000 watts running, so both the generator model and its stated operating ratings define the appropriate use case.

Skip it if you have a Honda EU2200i; the Hutch Mountain EU2200i kit is listed for that generator.

Choose Cirecsiy for a listed Predator 3200W/4000W generator when a supplied regulator and fuel-line components suit your conversion workflow. The model-specific compatibility is the main boundary; confirm your generator belongs to that stated family.

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

#10

10. Impco 22R Propane Kit

Best for: Stock Toyota 22R engine conversion.

Why it ranks #10: Designed specifically for a stock Toyota 22R engine rather than a portable generator; it is a direct fit only for buyers with that engine.

A complete straight-propane conversion specifically for the stock Toyota 22R engine makes the Impco kit distinct from small-generator carburetor replacements. Its adapter uses the existing throttle plate, enabling a conversion approach tailored to the listed 22R application rather than a universal generator fit.

Impco identifies the kit for a stock 22R engine producing 96 hp and says the adapter uses the existing throttle plate. That application-specific design helps define the intended installation and separates it from kits for GX-series generator engines. The description says everything is included to convert the 22R and notes silicone diaphragms; buyers should treat the stock-engine specification as central, since the supplied facts do not describe a general-purpose conversion for other engines.

Skip it if you are converting a Honda GX390 generator; the AUTOKAY GX390 kit lists portable-generator compatibility.

Choose Impco when converting the specified stock 22R engine for an off-road truck or rock crawler. Its throttle-plate approach and complete-kit description are tied to that engine, so the 22R application is the decisive fit boundary.

Listed on Amazon as: 22R Engine Complete Propane Conversion Kit Offroad Rock Crawler Truck 22