Best Propane Carburetor for Generator: Top 5 Conversion Kits 2026
Answering the buyer’s search intent, these propane and dual/fuel carburetor kits convert common gasoline generators to propane, natural gas, or LPG. The top picks suit different users: homeowners needing reliable backup power, small shop operators seeking safer fuel options, and enthusiasts upgrading older Generac, Champion, Predator, Honda GX engines, or GX270/ GX340/ GX390 platforms.
Overview at a glance (best for quick comparison):
| Product | Best For | Fuel Types | Notes |
|---|---|---|---|
| YAMAKATO 389cc/420cc Tri Dual Kit | Builders upgrading multiple engine sizes | Gas, LPG, CNG | Broad compatibility; OEM-like build |
| YAMAKATO Dual Tri Fuel for Predator/Honda/Generac | Predator and Honda GX engines | Gasoline, Natural Gas, LPG | Wide generator range; some models limited |
| Nature Gas Propane Carburetor (ALLMOST) | Predator Harbor Freight fans | Gas, LPG | Simple kit; good operation, easy install |
| KELKONG GX390 LPG/NG Kit | Honda GX390 and clones | Gasoline, LPG, CNG | Includes air filter; strong safety design |
| HIPA 389cc/420cc Tri Dual Kit | Champion/Predator/Generac combos | Gas, LPG, CNG | 3-position switch, manual choke for cold starts |
YAMAKATO 389cc 420cc Tri Dual Generator Carburetor
The YAMAKATO Tri Fuel Carb Kit supports a broad range of engine sizes (301–459 cc) and several Generac, WH-series, Firman, and Champion models. It is designed for generators converting from gasoline to natural gas (LPG/LNG) or CNG, with non-asbestos mounting gaskets included. Best for users who want one kit across multiple gensets and OEM-style construction. A potential limitation is the breadth of compatibility; verify your exact model before purchasing.
YAMAKATO Dual Tri Fuel Carburetor for Predator/ Honda/ Generac
This kit targets Honda GX160/200 and several Predator, Generac, and Champion models, offering tri-fuel capability. It includes non-asbestos mounting gaskets and is suitable for users converting generators in the 196–224 cc range and larger Generac units. Choose this if you own a Charter of Gen sets in this family and need a broad tri-fuel solution; beware that some Champion models may have limited applicability.
Nature Gas Propane Carburetor (ALLMOST)
Allmost’s Nature Gas Propane Carburetor is aimed at Predator Harbor Freight generators in the 3200–4000 watt range. It provides a straightforward replacement carburetor with the necessary gaskets, designed for easier installation and reliable operation. Best for DIY converters who want a focused solution for Harbor Freight machines; avoid this kit if your generator model isn’t clearly listed in the compatible range.
KELKONG GX390 LPG/NG Generator Carburetor
Designed for Honda GX390 and clones, this carburetor kit supports a wide engine range (301–459 cc) and various Generac/WH series units. It emphasizes safety through a thoughtful structural design and includes an air filter in some listings. Best for users who want a robust, install-ready kit with built-in safety features; consider compatibility with your exact engine family to ensure a perfect fit.
HIPA 389cc 420cc Tri Dual Kit for Generators
The HIPA kit targets Champion, Predator, Generac, and Honda-based gensets, offering a dual-fuel solution across a sizable engine range (338–460 cc). Features include a three-position rotary switch and manual choke for reliable starts in varying weather. Choose this if you need a versatile, user-friendly kit with explicit cold-start controls; avoid if your model isn’t explicitly listed in the supported range.
Hipa GX390 188F Dual Fuel Carburetor
This dual-fuel carburetor supports Honda GX390-based configurations and GX340/ GX420 variants, including Predator and Champion models listed in the description. It emphasizes dual-fuel capability (gasoline with LPG/CNG) and a range suitable for 4.5–6.5 kW generators. Best for users who rely on flexibility across fuel sources; check exact model compatibility before purchasing.
KINDZA Carburetor LPG for Predator Harbor Freight
This Kindza carburetor is aimed at Harbor Freight Predator gensets (5500–8750 watts) and compatible Honda/ GX390 engines, providing a dual fuel option for LPG and natural gas. Best for users with mid-to-large portable generators seeking a straightforward LPG/NG retrofit; avoid if your generator is outside the listed brands or wattage range.
Buying Guide
Key purchase considerations to help compare options:
- Engine compatibility: Confirm the exact engine model and displacement (cc) before buying.
- Fuel flexibility: Decide if you want gasoline-to-LPG, gasoline-to-NG, or full tri-fuel capability.
- Installation complexity: Some kits include mounting gaskets and air filters; others require additional parts.
- Safety features: Look for designs with stable choke and safe fuel switching mechanisms.
- OEM vs aftermarket: OEM-style kits may offer closer fit to original components; verify warranty implications if relevant.
- Maintenance considerations: Check gasket quality and replacement part availability for long-term use.
Frequently Asked Questions
- Can I convert any generator to propane with these kits? Answer: Not all models are listed; always check the exact engine displacement and model compatibility before purchase.
- Do these kits include all necessary gaskets? Answer: Many listings include non-asbestos mounting gaskets, but verify the included parts in each product description.
- Is tri-fuel operation safer than single-fuel? Answer: Tri-fuel provides fuel-source flexibility, but proper installation and safety inspection are essential.
- Will converting affect warranty? Answer: Conversion kits may impact manufacturer warranties; review your generator’s warranty terms before installation.
- What maintenance is required after conversion? Answer: Regular inspection of gaskets, hoses, and fuel connections; ensure proper fuel line routing and leak checks.
- How do I choose the right kit for my generator? Answer: Match engine displacement, model line, and fuel type compatibility; prefer kits explicitly listed for your generator family.