12 Best Tri Fuel Conversion For Generator of 2026 To Run Propane and Natural Gas

1

YAMAKATO Dual Tri Fuel Carburetor for Predator 4000 4375 Honda

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  9.7
• Brand
  YAMAKATO

Key specs2

Engine Compatibility

Predator 4000, Predator 4375, Honda GX160

Conversion Method

Replaces the entire stock carburetor with a dedicated tri-fuel body, eliminating external adapter blocks.

Pros & cons32

Pros

• Directly replaces the stock carburetor on Predator 4000, 4375, and Honda GX160 engines
• Adds propane and natural gas capability while preserving standard gasoline operation
• Integrated body design eliminates the need for external carburetor adapter spacers

Cons

• External demand regulator and gas supply hoses must be verified and sourced separately
• Choke linkage and governor arm alignment require careful verification during assembly

2

Hutch Mountain Generator Tri-Fuel Conversion Kit for Honda EU3000is

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  9.5
• Brand
  Hutch Mountain

Key specs2

Target Generator

Honda EU3000is Inverter

Inverter Protection

Engineered to fit the enclosed EU3000is without cutting the housing or risking delicate inverter wiring.

Pros & cons32

Pros

• Engineered specifically to convert the enclosed Honda EU3000is inverter generator
• Enables seamless switching between utility natural gas, propane, and pump gasoline
• Designed to install cleanly without altering delicate inverter wiring or casing

Cons

• Incompatible with other Honda generator sizes or open-frame utility engines
• Natural gas line pressure and quick-disconnect fittings must be verified by the user

3

Hutch Mountain Generator Tri-Fuel Conversion Kit for Honda EU2200i

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  9.0
• Brand
  Hutch Mountain

Key specs2

Target Generator

Honda EU2200i Inverter

Fuel Flexibility

• Runs on low-pressure natural gas lines
• Connects to portable 20 lb propane tanks
• Maintains original pump gasoline operation

Pros & cons32

Pros

• Dedicated conversion design built specifically for the compact Honda EU2200i inverter
• Allows running on continuous utility natural gas, portable propane, or gasoline
• Maintains original generator housing dimensions for standard transport and storage

Cons

• Dedicated fitment cannot be transferred to larger EU3000is or generic engine models
• Running wattage decreases naturally on natural gas, requiring careful load planning

4

NashFuel Generator Conversion Kit - Tri-Fuel (Propane, Natural Gas, Gasoline)

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  8.9
• Brand
  Nashfuel

Key specs2

Hardware Construction

Industrial-grade stainless steel bolt

Adapter Architecture

Uses a single-piece industrial adapter that mounts with stainless hardware to minimize vibration leaks.

Pros & cons32

Pros

• Industrial-grade single-piece conversion assembly built with stainless steel bolts
• Supports true tri-fuel flexibility across propane, natural gas, and gasoline
• Rigid hardware design minimizes fuel intake leaks caused by severe engine vibration

Cons

• Exact engine displacement and mounting pattern compatibility must be confirmed online
• Listing does not specify if a zero-governor demand regulator is included in the package

5

YAMAKATO 389cc 420cc Tri Dual Generator Carburetor Gas LPG CNG

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  8.6
• Brand
  YAMAKATO

Key specs2

Displacement Range

389cc to 420cc engines

Fuel Delivery Method

Swaps the factory carburetor for a high-displacement casting with integrated ports for gasoline, LPG, and CNG.

Pros & cons32

Pros

• Sized specifically for high-displacement 389cc and 420cc clone generator engines
• Complete carburetor swap integrates dedicated ports for LPG and CNG fuel supply
• Retains full gasoline float bowl functionality for backup liquid fuel operation

Cons

• Unsuitable for smaller displacement platforms such as 196cc, 212cc, or 224cc motors
• Air filter housing clearances and manual choke rod travel require careful checking

6

Tri-Fuel Propane Natural Gas Conversion Fits Generac 6500 Series 49ST

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  8.5
• Brand
  Generic

Key specs2

Engine Platform

Generac 6500 Series 49ST

Outage Readiness

Configured to adapt Generac 6500 units to utility natural gas for continuous runtime during extended grid failures.

Pros & cons32

Pros

• Built for precise fitment on Generac 6500 Series 49ST portable generator engines
• Enables long-term emergency operation on utility natural gas lines or propane tanks
• Retains factory gasoline setup so you can switch back whenever gas lines are unavailable

Cons

• Does not fit other Generac model families or general utility engine configurations
• Household gas line delivery pressure must be checked against engine demand specs

7

Generic GP5500 Propane/Natural Gas Tri-Fuel Conversion Kit

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  8.3
• Brand
  Nashfuel

Key specs2

Engine Platform

Generac GP5500 Series

Fuel Options

• Direct connection for household natural gas
• Propane cylinder compatibility for remote sites
• Preserves factory gasoline tank usage

Pros & cons32

Pros

• Designed specifically for straightforward mounting onto Generac GP5500 generator frames
• Provides three-way fuel capability using utility natural gas, bottled LPG, or gasoline
• Avoids extensive frame cutting or destructive modification of the factory engine

Cons

• Platform-specific design cannot fit larger Generac GP7500 or GP8000 generator bodies
• Supply hose sizing and demand regulator requirements must be verified before hookup

8

Tri-Fuel Propane Natural Gas Generator Conversion Generic GP7500E GP7500 Green

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  8.1
• Brand
  Nashfuel

Key specs2

Power Output Class

Generac GP7500 and GP7500E

High-Draw Gas Flow

Calibrated to supply the necessary fuel volume required to sustain heavy 7500-watt electrical loads on gaseous fuels.

Pros & cons32

Pros

• Engineered specifically for heavy-duty Generac GP7500 and GP7500E generator platforms
• Supports continuous natural gas, portable propane cylinders, and pump gasoline
• Sized to maintain necessary fuel volume for high-demand 7500-watt electrical loads

Cons

• Incompatible with smaller GP5500 frames or alternative clone generator platforms
• Adequate utility gas pipe diameter must be confirmed to avoid fuel starvation under load

9

Grenergy - EU2200i Propane, Natural Gas & Gasoline Tri Fuel

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  8.1
• Brand
  Grenergy

Key specs2

Compatible Platform

Honda EU2200i Inverter

Inverter Optimization

Adds tri-fuel capability to compact Honda inverter units while keeping the exterior enclosure clean and portable.

Pros & cons32

Pros

• Custom-engineered conversion design matched to the Honda EU2200i inverter generator
• Runs on utility CNG, portable LPG cylinders, or standard gasoline for outage security
• Preserves the enclosed portable profile of the Honda EU2200i without bulky overhang

Cons

• Confined strictly to the EU2200i platform, offering no fitment on larger Honda units
• Natural gas output wattage drop requires monitoring connected appliance startup surge

10

Propane Natural Gas Conversion Predator 3500 Inverter Generator

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  7.7
• Brand
  Nashfuel

Key specs2

Compatible Platform

Predator 3500 Inverter

Enclosed Generator Setup

Engineered to deliver gaseous fuel into the Predator 3500 without compromising internal sound baffling.

Pros & cons32

Pros

• Designed specifically for the enclosed Predator 3500 inverter generator platform
• Enables running on clean utility natural gas or portable propane during outages
• Preserves internal gasoline carburetor components for flexible fuel selection

Cons

• Will not mount onto open-frame Predator models or smaller inverter generator sizes
• Hose entry routing and internal engine compartment clearance must be verified

11

Tri-Fuel Propane Natural Gas Generator Conversion Generic GP8000E GP8000 Green

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  7.2
• Brand
  Nashfuel

Key specs2

Generator Series

Generac GP8000 and GP8000E

Heavy Backup Capacity

Engineered for 8000-watt backup loads, ensuring sufficient fuel volume when switching away from pump gasoline.

Pros & cons32

Pros

• Built specifically for high-capacity Generac GP8000 and GP8000E backup generators
• Delivers tri-fuel versatility across home natural gas, bottled propane, and gasoline
• Engineered to support high fuel flow requirements for large whole-home backup loads

Cons

• Does not fit smaller Generac GP-series generators or standard Honda engine clones
• Gas supply meter pressure and regulator ratings must be verified prior to installation

12

389CC 420CC Tri Dual Generator Carburetor Kit, Gas to LPG

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  7.1
• Brand
  MQLPXI

Key specs2

Displacement Range

389cc and 420cc engines

Carburetor Design

Direct carburetor swap that integrates multi-fuel switching ports for large-displacement clone generators.

Pros & cons32

Pros

• Designed directly for 389cc and 420cc OHV generator engines and compatible clones
• Complete carburetor replacement body features integrated fittings for LPG and CNG
• Lets you switch between pump gasoline, cylinder propane, and household natural gas

Cons

• Incompatible with smaller engine displacements such as 208cc or 224cc powerheads
• Gasket alignment and choke mechanism clearance must be inspected prior to final bolting

Last update on 2026-10-16 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Will a tri-fuel conversion kit fit my generator without drilling?

It depends on the kit design and your exact engine model. Replacement carburetor kits, such as those made for 389cc and 420cc engines or the Predator 4000 and 4375, bolt on directly in place of the factory carburetor without drilling into the engine or frame. Other options, like the NashFuel conversion kit with a stainless steel bolt, use specific mounting hardware to secure the fuel path. Always check the installation details for your unit, whether it is a Generac 6500 series 49ST or a Honda GX160, to confirm that no permanent frame or component drilling is needed.

Can I still use pump gasoline after converting to tri-fuel?

Yes, genuine tri-fuel conversion designs allow you to switch between gasoline, propane (LPG), and natural gas (CNG). Kits built for models like the Honda EU2200i or Generac GP7500 maintain the standard gasoline fuel pathway alongside gaseous hookups. When switching back to pump gasoline, turn off the gaseous fuel line completely before opening the liquid fuel valve to avoid flooding the carburetor.

How much running wattage will my generator lose on natural gas?

Wattage loss depends on your specific generator model, engine displacement, and fuel energy density. Manufacturer specifications do not list a single universal power reduction number across all engines. Check the wattage ratings in your equipment manual or on the product listing for models like the GP5500, GP7500E, or GP8000 to verify running and starting output under each fuel type. If you need dedicated backup power for electronics while managing fuel supplies, pairing your setup with a laptop power bank for remote work keeps vital devices running without placing extra demand on your generator.

Can inverter generators run on propane and natural gas conversion kits?

Yes, manufacturers produce dedicated tri-fuel conversion kits for specific inverter generators. Models such as the Honda EU2200i, Honda EU3000is, and Predator 3500 inverter generator have dedicated kits designed to accommodate compact housings and sensitive engine setups. Do not attempt to use an open-frame carburetor assembly on an inverter unit, as fuel connections and internal clearances differ significantly.

Do tri-fuel conversion kits include a demand regulator?

Regulator inclusion varies depending on the specific kit and manufacturer package. Certain kits provide a complete conversion carburetor setup for LPG and CNG, while single-piece hardware kits or basic conversion packages may require an external regulator. Check the package description to confirm whether a low-pressure demand regulator is included in the box or if you must provide one to match your household utility line or propane tank pressure.

How do I confirm engine compatibility before buying a conversion kit?

Check the displacement and model code stamped on your generator engine data tag. Conversion kits are tailored to specific engine lines, such as Honda GX160, 389cc and 420cc designs, or specific generators like the Generac GP8000E and GP7500. Avoid assuming a kit fits universally, and verify your carburetor mounting pattern and throttle linkage setup against the product listing. For basic communication backup while checking fuel lines during an outage, a solar power bank for off-grid charging provides a dependable reserve.