The best generator dual fuel conversion kit depends on your engine model and the fuel you plan to use. For GX390-size engines, the Hipa dual-fuel carburetor supports LPG and CNG; for three-fuel flexibility, the Hipa tri-fuel kit is a candidate. The SYOWADA kit targets smaller GX200-style engines, while the Westinghouse kit is made for the WGEN9500DF. Check the exact generator and carburetor fitment before ordering: similar engine sizes do not guarantee compatibility.
| Kit | Best for | Fuel options listed |
|---|---|---|
| Hipa GX390 Dual Fuel | GX340/GX390/GX420-class engines | Gasoline, LPG, CNG |
| Hipa Tri-Fuel | Compatible 340cc–460cc generators | Gasoline, LPG, CNG |
| KELKONG GX390 | Listed GX270–GX390-style applications | LPG, natural gas |
| SYOWADA GX200 Style 1 | GX200-style generators | LPG, CNG |
| Westinghouse WGEN9500DF Kit | Westinghouse WGEN9500DF | Natural gas; retains gasoline and propane options |
Hipa GX390 Dual-Fuel Carburetor
This Hipa kit is best for owners of compatible GX340, GX390, or GX420 188F-style portable generators who want LPG or CNG capability. The listing describes it as a replacement carburetor for gasoline generators and gives a 4.5–6.5 kW output range. It also names some Predator and Generac models, but those model references should be checked against the generator’s exact engine and carburetor before purchase.
Why it was selected: Its listed engine range and fuel choices make it a broadly targeted option for larger portable generators. The stated limitation is fitment: the listed output range and model examples do not establish compatibility with every generator in those families. Verify the carburetor configuration and engine before ordering.
Hipa Tri-Fuel Generator Carburetor
Choose this kit if you need a listed option for gasoline, propane (LPG), and natural gas (CNG) on a compatible generator. Its features include a three-position rotary switch with an off setting and a manual choke lever. The listing names Honda GX340 and GX390 engines and clones, along with selected Champion, Predator, and Generac models.
Why it was selected: It provides the widest fuel-choice description among the selected carburetor kits. It is best for buyers who want three fuel options and whose generator matches the specified carburetor style. Avoid assuming that all generators with a similar displacement fit; compare the exact model and part number. Installation and fuel connections must follow the product instructions and generator requirements.
KELKONG GX-Series LPG/NG Carburetor
The KELKONG carburetor is best for buyers checking a GX270, GX340, or GX390-style engine and related listed clone displacements. The product description covers engines from 301cc through 459cc and names selected Generac and WEN generator models. It is described as an LPG/natural-gas carburetor replacement and notes a structural design intended to maintain a level of operational safety.
Why it was selected: The wide displacement list may help owners compare several GX-style engine sizes in one listing. However, a broad fitment list is not a substitute for confirming the generator’s exact carburetor and engine code. The provided features do not specify an output range or detailed installation steps, so check those requirements before choosing it.
SYOWADA GX200 Dual-Fuel Kit
This SYOWADA Style 1 kit is best for a compatible Honda GX200 170F-style portable generator. The listing also references 208cc, 210cc, and 212cc generator types, with a stated rated output range of 2–2.8 kW and maximum output of 3,500 watts. Its listed LPG pressure range is 2.8–3.8 kPa, and the kit is described for LPG and CNG conversion.
Why it was selected: It addresses smaller GX200-style engines rather than the larger GX390 class. Its stated pressure range is a key specification to compare with the fuel setup and product instructions. The listing’s displacement and wattage references cover multiple configurations, so verify the exact engine and kit style before purchase.
Westinghouse WGEN9500DF Natural Gas Kit
This kit is best for owners of the specifically named Westinghouse WGEN9500DF who want a natural-gas inlet. The listing says it uses an existing carburetor port, requires no permanent modification, and allows the generator to retain gasoline operation. It also says reconnecting the stock propane hose allows a return to propane.
Why it was selected: Its generator-specific description makes it a more targeted choice than a universal-style carburetor listing. The key limitation is that the named fitment is the WGEN9500DF; do not assume it works with another Westinghouse model. Confirm the generator version and follow the kit’s installation instructions.
Buying Guide: How to Choose a Generator Conversion Kit
Which engine and generator model does the kit fit?
Start with the generator’s model number, engine code, displacement, and existing carburetor configuration. Compare those details with the kit listing rather than relying on brand name or wattage alone. A GX390-style kit, for example, is not automatically suitable for every generator with a similar output rating.
Do you need LPG, natural gas, or both?
Check whether the listing specifically names propane/LPG, natural gas/CNG, or both. A dual-fuel description can refer to gasoline plus gaseous fuel, while a tri-fuel kit may list gasoline, LPG, and CNG. Confirm how fuel selection works and what hoses or fittings are included; the provided product details do not establish that every installation component is supplied.
What specifications should you compare?
For kits that provide them, compare the engine range, rated or maximum output, and LPG pressure range with your generator and fuel setup. Also check whether the product replaces the carburetor or uses an existing port. Follow the generator and kit instructions, and seek qualified help if you are uncertain about fuel connections or installation.
Frequently Asked Questions
Can a conversion kit fit any portable generator?
No. Fit depends on the generator’s engine, carburetor design, and the kit’s specified applications. Confirm the exact model and engine details before buying.
What does dual fuel mean for a generator conversion kit?
In these listings, dual-fuel carburetors are described for gasoline generators that can also use LPG and/or CNG. Check the individual kit to see which fuels it supports.
Is a dual-fuel kit the same as a tri-fuel kit?
Not necessarily. The selected Hipa tri-fuel listing names gasoline, propane, and natural gas, while other listings describe LPG and CNG conversion. Read the fuel list for the specific product.
Can the WGEN9500DF kit be used on another Westinghouse generator?
The supplied listing names the WGEN9500DF. It does not confirm fitment for other models, so verify compatibility before ordering.