Best Natural Gas Carburetors for Generators to Consider in 2026
If you’re shopping for a natural gas carburetor for a generator, you want a kit that reliably converts gasoline engines to run on natural gas or LPG. This guide highlights five solid options that suit a range of generator brands and displacements. Each option is described with who it’s best for, its key strengths, and a practical caveat. Use these details to compare compatibility, ease of installation, and long‑term fuel efficiency.
| Product | Best For | Notes |
|---|---|---|
| YAMAKATO Dual Tri Fuel Carburetor (Predator, Honda GX160, Generac, Champion) | DIYers seeking a flexible tri‑fuel setup for common small to mid‑sized generators | Wide displacement range; some models limited to certain CC |
| YAMAKATO 389cc‑420cc Tri Dual Generator Carburetor | Mid‑sized generators with multi‑fuel needs (LPG/LNG/CNG) | OEM‑style kit; broad generator compatibility |
| KELKONG GX340/ GX390 Carburetor for Dual Fuel | Gasoline generators needing LPG/NG conversion with safety focus | Includes safety considerations in design |
| Saihisday 208cc Generator Carburetor (Sams Club/Blackmax) | Smaller portable generators requiring replacement carburetor | Specific fitment notes for certain models |
| AUTOKAY Dual Fuel Carburetor (GX390, 4.5–6 KW) | GX390‑based portable generators needing LPG/NG compatibility | Rated for higher output ranges; portable use focus |
YAMAKATO Dual Tri Fuel Carburetor For Predator And More
This tri‑fuel carburetor kit is designed for Honda GX160 family engines and various clone models, including 196cc, 212cc, and 224cc Displacements. It supports gasoline to natural gas conversions, with non‑asbestos mounting gaskets included. Best for: generator owners who want flexibility across fuel sources and manufacturers. Caution: Confirm compatibility with your exact generator model—this kit lists multiple supported brands and may not cover every variant.
YAMAKATO 389cc–420cc Tri Dual Generator Carburetor
This kit targets mid‑range generator displacements (roughly 301cc to 420cc) and supports dual fuel operation, including LPG, LNG, CNG, and gasoline. It’s positioned as OEM‑quality with mounting gaskets included. Best for: users with Generac GP5000/GP6500 or Champion 4000–depending on model range who want a robust tri‑fuel option. Caution: Extensive part integration is required; verify the exact engine model and displacement before purchase.
KELKONG GX340/GX390 Dual Fuel Carburetor Kit
Designed for Honda GX270/340/390 family and corresponding Generac and WH series units, this kit emphasizes safe operation and balanced air/fuel delivery. Best for: users upgrading to LPG/NG capability on a mid‑range Gen set with GX270/390 engines. Caution: The inclusion of safety design features implies a careful installation to preserve fuel seal integrity and engine timing.
208cc Generator Carburetor Replacement
This carburetor is a replacement option for 208cc class generators, such as Sams Club 208cc units and BLACKMAX models. Best for: owners of compact portable generators seeking straightforward carb replacement. Caution: Fitment is model‑specific; check the exact engine code and mounting style before buying.
AUTOKAY Dual Fuel Carburetor For GX390
Autokay’s dual fuel carburetor is aimed at GX390 engines in portable generators, offering compatibility with LPG/NG alongside gasoline. It supports 4.5–6 KW output ranges. Best for: GX390 users who want a robust dual‑fuel option without sacrificing portability. Caution: Higher output kits may require more precise tuning for stable natural gas operation.
KELKONG GX390 Dual Fuel Kit (Air Filter Included)
This dual fuel kit targets GX390/ GX340 units with extensive model coverage and emphasizes enhanced safety features in the carburetor design. Best for: builders who want a safer, more controlled conversion path for larger portable generators. Caution: Ensure compatibility with your exact engine model and air intake assembly to prevent fitment issues.
Hipa GX390 Dual Fuel Carburetor
Hipa’s dual fuel carburetor covers GX390 applications and claims compatibility with Predator, Champion, and Generac lines when used with suitable conversions. Best for: users seeking a broad, compatible solution across multiple big‑brand generators. Caution: The long feature list means verify exact model numbers and required fittings before purchase.
KINDZA Carburetor For Predator And Harbor Freight
KINDZA’s dual fuel carburetor targets Predator line and Harbor Freight predators, with LPG/NG compatibility for 5–8 KW ranges. Best for: users upgrading larger portable units, including Predator engines. Caution: Verify that the exact model matches the engine displacement and inlet/outlet configuration of your unit.
Buying Guide: How to Choose The Right Natural Gas Carburetor For Your Generator
- Understand your engine displacement and model. Match the kit’s supported cc and engine family (GX, Predator, Generac, Champion, etc.) to avoid fitment issues.
- Fuel compatibility matters. If you want true tri‑fuel capability, prioritize kits explicitly marketed as tri‑fuel or dual‑fuel with LPG/LNG/CNG options.
- Check required accessories. Some kits include non‑asbestos mounting gaskets and air‑filters; others may require separate components for a complete conversion.
- Assess safety and installation needs. Some designs emphasize safety in carburetor structure; ensure proper mounting, seals, and venting to prevent leaks.
- Consider installation complexity. Wider compatibility often means more steps to correctly tune fuel mixtures and timing for natural gas operation.
- Long‑term reliability. OEM‑style gaskets and proven configurations generally offer easier maintenance and replacement parts availability.
Frequently Asked Questions
- What is a tri‑fuel carburetor? A carburetor designed to operate with gasoline and a gas fuel like LPG, LNG, or CNG, allowing easier switching between fuels.
- Can I convert any generator to run on natural gas? Most portable and mid‑size generators can be converted with the right carburetor kit, but always verify engine displacement and model compatibility.
- Do these kits include all mounting hardware? Many include mounting gaskets and basic components, but some installations may require additional parts depending on the engine and exhaust setup.
- Is a dual fuel carburetor safer? Safety features vary by design; ensure proper mounting and adherence to manufacturer guidelines to minimize fuel leaks and backfires.
- Will a natural gas carburetor improve efficiency? Natural gas can offer cleaner operation and cost benefits in some regions, but fuel efficiency depends on engine tuning and gas pressure delivery.
- Do I need professional installation? For many kits, a knowledgeable DIYer can complete installation, but professional help is recommended for critical safety and emissions adjustments.