Propane carburetor conversion kits offer a practical way to run generators on LPG or CNG, reducing fuel costs and emissions while expanding fuel options. This guide reviews five popular kits designed for common Honda, Predator, Generac, and Champion/Duromax engines. Each option is evaluated for compatibility, ease of installation, and fuel efficiency to help you choose the right kit for your setup.
Summary of selected products
| Product | Engine Compatibility | Fuel Type | Notes |
|---|---|---|---|
| GX160 Dual Fuel Carburetor LPG NG Conversion Kit | GX160, GX200 | Propane, Natural Gas | Widely fits Harbor Freight and similar models |
| DVBB 389cc/420cc Tri Dual Generator Carburetor LPG/CNG Kit | Generac/Predator/Champion/Duromax/Honda variants | Propane, LPG, CNG | OEM-compatible multi-engine kit |
| 1PZ JI9-WH3 GX390 Dual Fuel Carburetor | GX340/GX390 family, Predator/Generac/Champion | Propane, Gasoline | Dual fuel with manual choke |
| YAMAKATO 389cc/420cc Tri Dual Generator Carburetor | GX270/GX340/GX390, Generac/Predator/Champion | Propane, LPG, CNG | OEM-style conversion for multiple engines |
| New GX390 188F Dual Fuel Generator Carburetor | GX340/GX390/GX420 | Propane, LPG, Gasoline | Conversion for 5-8KW range generators |
GX160 Dual Fuel Carburetor LPG NG Conversion Kit
Designed for Hon-da GX160 and GX200 engines, this carburetor supports LPG and natural gas operation. It is also compatible with 168F and 170F variants, as well as 6.5HP to 7.5HP generators. The kit covers a range of 4000 to 63962 models and is suitable for Harbor Freight Predator 212cc OHV engines. Installation typically involves replacing the stock carburetor and adapting fuel lines to LPG or NG sources. This option emphasizes broad engine compatibility and straightforward swap for dual-fuel operation.
DVBB 389cc/420cc Tri Dual LPG/CNG Kit
Multi-engine compatibility with a robust design makes this kit a versatile option for LPG or CNG conversions across several popular generator lines. It supports OEM-style fitments and aims to simplify swapping the carburetor while maintaining reliable performance under dual-fuel operation.
1PZ JI9-WH3 GX390 Dual Fuel Carburetor
Built for Honda GX390 and GX340 families, this dual-fuel carburetor targets 11–15 HP generators and equipment from Predator, Generac, and Champion. It includes compatibility with several part numbers and is described as constructed from high-quality materials for durability and extended use. The kit supports LPG/CNG operation alongside gasoline and is suited for manual choke setups, which can enhance cold starts.
YAMAKATO 389cc/420cc Tri Dual Kit
YAMAKATO’s multi-engine kit targets popular lawn and portable generators with GX270/GX340/GX390 variants. It emphasizes compatibility with Generac, Predator, Champion, and Duromax lines and supports LPG or CNG conversion. The kit is positioned as an OEM-style option designed for reliable performance across a range of horsepower classes, with emphasis on robust choke and fuel supply adaptation for dual-fuel operation.
New GX390 188F Dual Fuel Generator Carburetor
This carburetor is designed for GX390 and GX420 engines, enabling dual-fuel operation with LPG and CNG. It targets a 5KW to 8KW generation range and supports a gasoline-based engine configuration with manual choke. The kit claims compatibility with GX340 and GX420 models, offering a solution for users seeking a seamless LPG or natural gas integration across multiple Honda-based generators and similar engines. The emphasis is on straightforward installation and durable construction.
Buying Guide: Key Considerations For Propane Carburetor Conversions
- Engine compatibility: Check the engine model numbers (GX, Predator, Generac, Champion, etc.) and confirm the conversion kit covers your exact variant and horsepower range.
- Fuel system design: Decide between LPG, CNG, or dual-fuel configurations based on fuel availability, tank size, and typical runtime needs. Some kits emphasize quick swap options; others require more extensive line routing.
- Installation complexity: Assess whether the kit requires professional installation or if it can be a DIY swap. Look for kits with clear instructions and compatible fuel fittings.
- Choke and fuel metering: Manual choke vs automatic, and the quality of the carburetor’s metering can affect cold starts and efficiency, especially in propane environments with cooler ambient temperatures.
- Durability and materials: Favor kits built from corrosion-resistant parts and high-quality gaskets and diaphragms to withstand LPG/CNG fuels and pressure variations.
- Warranty and support: Check manufacturer warranty terms and availability of customer support for troubleshooting during installation and operation.
- Local regulations: Some regions have restrictions on LPG/CNG retrofits; confirm compliance with local codes and any required inspections.
- Performance expectations: Expect slight power losses or changes in throttle response when switching fuels; consider tuning requirements to maintain optimal output for your generator.
- Availability of spare parts: Ensure replacement carburetors, seals, and adapters are readily available to minimize downtime.
When selecting a propane carburetor conversion kit, align your choice with the specific engine model, intended fuel type, and the practicality of installation in your setup. This approach helps optimize efficiency, reliability, and overall performance across a range of generators and engines used in residential and light commercial environments.