Best Small Engine Propane Conversion Kit Options for Portable Generators
Finding the right propane conversion kit for small engines can expand your generator’s fuel flexibility, reduce downtime, and simplify emergency readiness. This guide highlights top propane and natural-gas conversion solutions that fit common small-engine generators, including Predator, Duromax, Honda GX-based engines, and more. Each option features direct compatibility notes, installation basics, and what to consider before buying. Use the table below to compare key picks at a glance.
| Product | Brand | Fuel Type | Suitable Generators |
|---|---|---|---|
| ALLMOST Nature Gas Propane Carburetor Conversion Kit | ALLMOST | Propane/Natural Gas | Predator Harbor Freight 3200/4000 W |
| Natural Gas Conversion Kit for Duromax XP12000EH | Generic | Natural Gas | Duromax XP12000EH |
| KELKONG GX160 LPG/NG Carburetor Dual Fuel Kit | KELKONG | Propane/Natural Gas | Predator 3200/4000, GX160/168F engines |
| YAMAKATO 389cc/420cc Tri Dual Generator Carb Kit | YAMAKATO | Gasoline/Propane/Natural Gas | Generac, Predator, Champion, Duromax, Honda, etc. |
| Toolyuan GX160 Dual Fuel Carburetor LPG/NG Kit | Toolyuan | Propane/Natural Gas | GX160/GX200, Harbor Freight Predator 212cc |
ALLMOST Nature Gas Propane Carburetor Kit
The ALLMOST kit is designed to adapt Predator Harbor Freight generators for propane or natural gas operation. It includes a carburetor assembly, three gaskets, and replacement hardware to swap the stock carburetor. The unit emphasizes straightforward installation and reliable operation with compatible models such as 3200 and 4000-watt gas generators. For buyers, the kit reduces the need for permanent fuel-system modifications, preserving gasoline compatibility while enabling clean-burning alternate fuels.
Key considerations include the availability of compatible mounting points on your generator, the pressure and delivery characteristics of propane or natural gas lines, and whether the carburetor’s tuning specifications meet your altitude and load expectations. Installation complexity is moderate, and the included components aim to minimize downtime during conversion. Users should verify that their unit’s throttle linkage and fuel lines align with the kit’s design to ensure smooth operation.
Natural Gas Conversion Kit for Duromax XP12000EH
This conversion kit is tailored for the Duromax XP12000EH, enabling natural gas use via the carburetor inlet with no permanent gasoline engine modifications. It preserves gasoline operation as a fallback, so you can switch back by reconnecting the stock propane hose. The approach targets users seeking a low-impact path to dual-fuel capability, leveraging a natural gas inlet that integrates with the existing carburetor port. It is described as a straightforward upgrade for generators in the XP12000EH class.
Considerations involve compatibility with your exact model year, ensuring that the natural gas supply pressure and regulator requirements are matched. Since the kit relies on the existing carburetor port, any preexisting carburetor wear or tuning will influence performance. Users should assess the regulatory and safety aspects of natural gas use in their locality and how this kit aligns with their fuel storage plans during outages or outdoor use.
KELKONG GX160 LPG/NG Dual Fuel Carburetor Kit
The KELKONG carburetor kit targets Honda GX160/168F/170F engines and similar generators, offering tri-fuel capability for Predator 3200–4000-watt units and other compatible models. The kit is described as a three-fuel replacement option, with a focus on compatibility across a range of displacement classes (168cc to 212cc). It is marketed as suitable for multiple brands, including Firman and certain clone engines, with explicit notes on inverter vs. non-inverter generator compatibility.
When evaluating this kit, check the engine displacement match, the available mounting hardware, and whether you need additional adapters for your intake or fuel lines. The tri-fuel design can require careful adjustment to lean/rich mixtures, so users should plan for tuning after installation. Safety considerations include proper venting and secure fuel connections to prevent leaks in portable setups.
YAMAKATO 389cc/420cc Tri Dual Generator Carb Kit
The YAMAKATO tri-fuel kit supports multiple engine classes, includingGenerac, Predator, Champion, and Duromax platforms, with 389cc to 459cc displacement ranges. It emphasizes OEM-like quality for carburetor replacement and enables gasoline-to-national gas/LPG/LNG/CNG transitions. The kit includes non-asbestos mounting gaskets and aims to support a wide range of generator models.
Key purchase considerations include whether your generator’s carburetor mounting pattern matches the kit, the complexity of a dual/tri-fuel setup, and the regulator requirements for propane or natural gas. The broad compatibility makes it appealing for hobbyists with diverse equipment, but users should verify model-specific fitment and check for any accessory needs beyond the kit contents, such as fuel line adapters or mounting brackets.
YAMAKATO Dual Tri Fuel Carburetor for Predator and More
This YAMAKATO dual tri-fuel carburetor kit is designed for Predator 4000/4375 and similar engines, including Honda GX160 and other popular displacement ranges. It supports multiple fuel types and positions itself as suitable for gasoline-to-propane or gasoline-to-NG/LPG transitions, with mounting gaskets and OEM-standard fitment mentioned. The kit targets a broad generator ecosystem and highlights cross-brand compatibility.
Prospective buyers should consider exact engine model compatibility, the required fuel-system modifications, and the potential need for tuning after installation. The kit’s broad compatibility can be advantageous for mixed-tool setups, but careful verification of model numbers and power ratings remains essential to achieve reliable operation with propane or natural gas.
Toolyuan GX160 Dual Fuel Carburetor Kit
The Toolyuan kit targets GX160 and GX200 engines, including Harbor Freight Predator 212cc and other 4000-watt class portable generators. It is positioned as a dual-fuel carburetor kit that supports LPG and natural gas conversion, with applicability to several 168F/170F-family engines. The kit emphasizes broad compatibility and a straightforward path to dual-fuel operation for common small engines.
Critical considerations include ensuring the GX160 or GX200 match, confirming the correct intake and linkage configuration, and understanding the fuel-regulator requirements for propane and natural gas. Users should evaluate whether their generator’s original carburetor and fuel lines can accommodate the additional fittings, and plan for any post-install tuning to optimize air-fuel mixtures under load.
Buying Guide: Key Purchase Considerations for Small Engine Propane Conversion Kits
- Engine compatibility: Verify displacement, brand, and model numbers to ensure a proper fit with the carburetor kit and mounting points.
- Fuel type support: Decide between propane, natural gas, or dual/fuel capabilities based on your storage options and typical usage scenarios.
- Installation complexity: Consider whether you can perform a DIY swap safely or if professional installation is advisable, especially for dual-fuel systems.
- Regulatory and safety: Check regulator compatibility, fuel line ratings, and local codes for using propane or natural gas with portable generators.
- Performance and tuning: Expect possible changes in idle stability, throttle response, and power output; plan for post-installation tuning and testing under load.
- Maintenance impact: Assess whether the kit requires additional maintenance tasks, such as periodic regulator checks or gasket replacement.
- Durability and warranty: Look for corrosion-resistant fittings and manufacturer support, as well as warranty coverage for wear parts like gaskets and seals.
- Availability of replacement parts: Ensure that gaskets, seals, and regulators are readily available in case of wear or damage.