8 Best Natural Gas Conversion Kits That Save You Money
The best natural gas conversion kits for generators depends on your needs. The Hutch Mountain Honda EU2200i Kit is best for those wanting a premium tri-fuel solution with quick setup, while the YAMAKATO 389cc Kit excels at universal compatibility across multiple generator brands. For Duromax XP12000EH owners on a budget, the Natural Gas Conversion Kit stands out with its affordable price and reversible installation.
Converting your generator to run on natural gas offers significant advantages including cleaner emissions, lower fuel costs, and unlimited runtime when connected to your home’s gas line. These kits eliminate the hassle of storing gasoline and prevent carburetor problems caused by ethanol buildup.
Quick Comparison Table
| Product | Fuel Options | Installation Type | Required Pressure | Pre-Assembly | Compatibility |
|---|---|---|---|---|---|
| Duromax XP12000EH Kit | Natural Gas + Propane | Non-permanent | 9-13.8″wc | Ready to install | Duromax XP12000EH only |
| Westinghouse WGEN9500DF Kit | Natural Gas + Propane | Non-permanent | 9-13.8″wc | Ready to install | Westinghouse WGEN9500DF |
| Hutch Mountain EU2200i | Tri-fuel (all 3) | Bolt-on | Regulated | 90% preassembled | Honda EU2200i |
| Mikatesi 039-122 | Tri-fuel (all 3) | Bolt-on | Regulated | Ready to install | Honda & compatible models |
| YAMAKATO 389cc Kit | Tri-fuel (all 3) | Manual carb replacement | 0.29-0.55 psi | Requires assembly | Universal (multiple brands) |
| DK Generator Kit | Tri-fuel (all 3) | Bolt-on | Regulated | Preassembled | DK5000iE |
| Grenergy EU2200i | Tri-fuel (all 3) | Bolt-on | Preset | 100% complete | Honda EU2200i |
| Hutch Mountain EU2000i | Tri-fuel (all 3) | Bolt-on | Regulated | 90% preassembled | Honda EU2000i series |
Best Natural Gas Conversion Kits for Generators
1. Natural Gas Conversion Kit for Duromax XP12000EH – Budget-Friendly Powerhouse Upgrade
Best for: Duromax XP12000EH owners seeking an affordable natural gas conversion without permanent modifications.
Key Features:
| Feature | Details |
| Compatibility | Duromax XP12000EH 12KW |
| Installation | Reversible, non-permanent |
| Pressure Range | 9-13.8″wc inlet |
| Fuel Flexibility | Switches between NG/propane |
| Price Point | Most affordable option |
The Natural Gas Conversion Kit for Duromax XP12000EH is the most budget-friendly option for owners of this specific generator model. At just $52.98, it delivers exceptional value without compromising functionality.
The kit uses your existing carburetor port, meaning no drilling or permanent alterations to your generator. You can easily switch back to propane by reconnecting the stock hose whenever needed.
Installation is straightforward with all necessary components included in the package. The required inlet pressure of 9-13.8″wc is standard for most residential natural gas lines.
This kit maintains your generator’s dual-fuel capability while adding natural gas as a third option. The reversible design protects your warranty and resale value.
For Duromax XP12000EH owners wanting natural gas capability without breaking the bank, this conversion kit offers unbeatable value and simplicity.
Pros:
- Extremely affordable at $52.98
- No permanent modifications required
- Easy switching between fuel types
- Complete kit included
Cons:
- Only fits one generator model
- Basic instructions provided
2. Westinghouse WGEN9500DF Natural Gas Kit – Premium Quality for Serious Users
Best for: Westinghouse WGEN9500DF owners who want reliable natural gas conversion with quality components.
Key Features:
| Feature | Details |
| Compatibility | Westinghouse WGEN9500DF |
| Regulator | Impco or aftermarket included |
| Installation | Non-permanent, reversible |
| Pressure Range | 9-13.8″wc inlet |
| Build Quality | Premium components |
The Westinghouse WGEN9500DF Natural Gas Kit provides a professional-grade conversion solution for this popular dual-fuel generator. The kit includes high-quality Impco or aftermarket regulators for reliable performance.
Installation uses the existing carburetor port without any permanent modifications. This design preserves your generator’s original functionality and allows quick fuel switching.
The premium components ensure consistent performance under various load conditions. The regulator maintains proper fuel delivery for optimal power output.
You retain full gasoline capability and can switch back to propane anytime. The non-permanent installation means no warranty concerns or resale value loss.
This kit represents the middle ground between budget options and premium tri-fuel systems, offering excellent value for Westinghouse owners.
Pros:
- Quality Impco regulator included
- Reversible installation design
- Maintains all fuel options
- Professional-grade components
Cons:
- Higher price point
- Limited to one generator model
3. Hutch Mountain Honda EU2200i Tri-Fuel Kit – Premium Performance and Convenience
Best for: Honda EU2200i owners seeking a top-quality tri-fuel solution with professional support and easy installation.
Key Features:
| Feature | Details |
| Fuel Options | Propane, gasoline, natural gas |
| Pre-Assembly | 90% ready to install |
| Installation Time | Under 1 hour |
| RV Compatible | Quick-connect ready |
| Warranty Support | Manufacturer assistance available |
The Hutch Mountain Honda EU2200i Tri-Fuel Kit is a premium conversion solution that delivers professional results. The 90% preassembled design means you can complete installation in under an hour.
This kit eliminates ethanol-related carburetor problems while extending your generator’s lifespan. The cleaner-burning propane and natural gas reduce maintenance requirements significantly.
RV owners will appreciate the quick-connect compatibility with standard propane tanks. The kit works seamlessly with 20/30lb tanks and RV quick-connect systems.
Detailed picture instructions make installation straightforward even for beginners. No drilling or carburetor modifications are required, preserving your generator’s warranty.
Hutch Mountain’s commitment to quality and customer support justifies the premium price for serious users.
Pros:
- Three complete fuel options
- 90% preassembled for quick setup
- Excellent RV compatibility
- Strong customer support
Cons:
- Premium pricing at $293
- Only fits EU2200i model
4. Mikatesi 039-122 Tri-Fuel Kit – Versatile Honda-Compatible Solution
Best for: Honda and compatible generator owners wanting an affordable tri-fuel conversion with extended runtime.
Key Features:
| Feature | Details |
| Compatibility | Honda, Champion, Kawasaki clones |
| Runtime | 20+ hours on propane |
| Airflow | Full-flow adapter design |
| Emissions | Cleaner than gasoline |
| Part Numbers | Replaces multiple OEM parts |
The Mikatesi 039-122 Tri-Fuel Kit offers exceptional versatility for Honda EU2200i and compatible generator models. The kit’s proprietary full-flow adapter maintains maximum airflow for optimal power output.
Extended runtime of 20+ hours on a single propane tank makes this ideal for emergency backup situations. The cleaner-burning fuel eliminates carburetor gumming and reduces maintenance needs.
This kit replaces multiple OEM part numbers including C-039-122 and 075211. Compatibility extends to various Honda, Champion, and Kawasaki models with similar engines.
Installation is straightforward with the included ethanol gum eliminator switch. You can quickly switch between fuel types based on availability and preference.
At $57.99, this kit provides excellent value for those wanting tri-fuel capability without premium pricing.
Pros:
- Affordable tri-fuel option
- 20+ hour runtime capability
- Wide model compatibility
- Full-flow adapter design
Cons:
- Requires compatibility verification
- Basic installation instructions
5. YAMAKATO 389cc Universal Tri-Fuel Kit – Maximum Compatibility Champion
Best for: Owners of various generator brands seeking a universal conversion solution with broad compatibility.
Key Features:
| Feature | Details |
| Compatibility | Multiple brands and models |
| Engine Sizes | 301cc to 459cc |
| Installation Type | Manual carburetor replacement |
| Quality | OEM standard components |
| Gaskets | Non-asbestos included |
The YAMAKATO 389cc Universal Kit provides the broadest compatibility range of any conversion kit reviewed. It works with Generac, Predator, Champion, Duromax, Honda, and many other brands.
This manual carburetor kit fits engines from 301cc to 459cc including popular GX270, GX340, and GX390 models. The OEM-quality construction ensures reliable long-term performance.
Installation requires more mechanical skill than bolt-on kits since you’re replacing the entire carburetor. Basic mechanical ability and proper pressure regulation are essential for safe operation.
The kit includes non-asbestos mounting gaskets for safe installation. Proper pressure regulation is critical—natural gas requires 0.29-0.37 psi while LPG needs 0.40-0.55 psi.
For mechanically inclined users with various generator brands, this kit offers unmatched versatility at a reasonable price.
Pros:
- Widest brand compatibility
- Fits multiple engine sizes
- OEM quality construction
- Reasonable pricing
Cons:
- Requires mechanical skills
- Manual pressure regulation needed
6. DK Generator Conversion Kit – Quick Setup for DK5000iE Owners
Best for: DK5000iE generator owners wanting fast tri-fuel conversion with minimal hassle.
Key Features:
| Feature | Details |
| Compatibility | DD DINKING DK5000iE |
| Setup | Preassembled, quick install |
| Runtime | 20+ hours capability |
| Instructions | Graphic manual included |
| Modifications | No drilling required |
The DK Generator Conversion Kit is specifically designed for the DD DINKING DK5000iE model. The preassembled design allows for quick installation without carburetor modifications.
This kit eliminates common gasoline problems including ethanol gum buildup and carburetor clogging. The included eliminator switch makes fuel type changes simple and convenient.
Extended runtime of 20+ hours on clean-burning propane or natural gas makes this ideal for emergency situations. The cleaner emissions reduce engine wear and maintenance requirements.
Graphic instructions with detailed pictures guide you through the conversion process. No special tools or hardware store trips are needed—everything is included.
At $99.99, this kit provides good value for DK5000iE owners seeking reliable tri-fuel capability.
Pros:
- Preassembled for quick setup
- No carburetor modifications
- 20+ hour runtime
- Complete kit included
Cons:
- Limited to one generator model
- Mid-range pricing
7. Grenergy EU2200i Tri-Fuel Kit – Complete Ready-to-Run Solution
Best for: Honda EU2200i owners who want a complete, preset kit that works right out of the box.
Key Features:
| Feature | Details |
| Completeness | 100% complete kit |
| Preset | Ready for propane immediately |
| Installation | Bolt-on, no modifications |
| Runtime | 15-20 hours per tank |
| Engine Life | Extended with cleaner fuel |
The Grenergy EU2200i Tri-Fuel Kit comes 100% complete and preset to run on propane immediately. The bolt-on design requires no carburetor modifications or permanent changes.
One standard BBQ-size propane tank provides 15-20 hours of continuous runtime. This eliminates gas station trips and messy fuel spills during emergencies.
Propane’s cleaner combustion extends engine life by reducing carbon deposits and keeping oil cleaner. You’ll enjoy fewer maintenance intervals and cleaner spark plugs.
The carburetor-friendly design prevents gumming issues common with ethanol-blended gasoline. Long-term storage becomes worry-free without fuel degradation concerns.
While premium-priced at $299.99, the complete ready-to-run package and extended engine life justify the investment.
Pros:
- 100% complete kit
- Preset and ready to use
- 15-20 hour runtime
- Extends engine life
Cons:
- Premium pricing
- EU2200i only compatibility
8. Hutch Mountain Honda EU2000i Kit – Proven Tri-Fuel for Classic Models
Best for: Honda EU2000i series owners wanting reliable tri-fuel conversion with excellent RV integration.
Key Features:
| Feature | Details |
| Compatibility | EU2000i, Companion, EB2000i models |
| Pre-Assembly | 90% ready to install |
| Installation Time | Under 1 hour |
| RV Features | Quick-connect compatible |
| Support | Manufacturer assistance |
The Hutch Mountain Honda EU2000i Kit provides the same premium quality as their EU2200i version for older Honda models. The 90% preassembled design ensures quick installation in under an hour.
This kit works with EU2000i, EU2000i Companion, EB2000i, and EU20i models. The broad compatibility covers most Honda 2000-watt generators still in service.
RV owners benefit from quick-connect compatibility with standard propane systems. The kit works seamlessly with 20/30lb tanks and RV quick-connect hoses.
Cleaner-burning propane and natural gas eliminate ethanol problems while reducing maintenance needs. No carburetor modifications preserve your generator’s warranty and resale value.
Hutch Mountain’s reputation for quality and customer support makes this a reliable choice for EU2000i owners.
Pros:
- Fits multiple EU2000i variants
- 90% preassembled
- Excellent RV compatibility
- Strong customer support
Cons:
- Premium $293 price point
- Limited to older Honda models
How to Choose Natural Gas Conversion Kits for Generators
Generator Compatibility
The most critical factor is ensuring the conversion kit matches your specific generator model. Many kits are designed for particular brands and models, while others offer universal compatibility.
Check your generator’s model number against the kit’s compatibility list before purchasing. Universal kits like the YAMAKATO work with multiple brands but require more installation expertise.
Installation Complexity
Conversion kits range from simple bolt-on designs to complete carburetor replacements. Bolt-on kits require minimal mechanical skills and preserve your generator’s original components.
Consider your mechanical ability and available tools when choosing. Preassembled kits like Hutch Mountain’s offerings reduce installation time to under an hour, while manual carburetor kits demand more expertise.
Fuel Flexibility Options
Some kits offer dual-fuel conversion (natural gas plus propane), while premium options provide tri-fuel capability including gasoline. Tri-fuel kits offer maximum flexibility for varying fuel availability.
Consider your primary use case and fuel access. Home backup users with natural gas lines benefit from dual-fuel kits, while RV owners and campers need tri-fuel versatility.
Pressure Requirements
Natural gas and propane require specific pressure ranges for safe, efficient operation. Most residential natural gas lines provide 9-13.8″wc pressure, which matches many conversion kits.
Verify your gas line pressure before purchasing. LPG typically requires 0.40-0.55 psi, while natural gas needs 0.29-0.37 psi with proper regulation.
Build Quality and Support
Premium kits from manufacturers like Hutch Mountain and Grenergy include better components and customer support. Budget options work well but may lack detailed instructions or technical assistance.
Consider the long-term value of quality components and manufacturer support. Warranty coverage and replacement part availability become important for generators used frequently.
Frequently Asked Questions
Can I switch back to gasoline after installing a natural gas conversion kit?
Yes, most bolt-on conversion kits allow you to switch back to gasoline without removing the kit. Simply disconnect the natural gas line and reconnect your gasoline fuel system.
Will a natural gas conversion kit void my generator warranty?
Non-permanent bolt-on kits typically don’t void warranties since they don’t modify the original carburetor. However, check your specific warranty terms and consider contacting the manufacturer before installation.
How much power loss should I expect when running on natural gas?
Most generators experience 10-20% power reduction on natural gas compared to gasoline. Propane typically shows similar or slightly less power loss depending on the conversion kit quality.
Do I need a professional to install a natural gas conversion kit?
Bolt-on kits with preassembly can be installed by DIYers with basic mechanical skills in under an hour. Manual carburetor replacement kits require more expertise and proper pressure regulation knowledge.
What’s the runtime difference between natural gas and gasoline?
Natural gas connected to your home’s gas line provides unlimited runtime. Propane tanks offer 15-20+ hours depending on tank size and generator load, typically longer than equivalent gasoline amounts.
Final Thoughts
The Hutch Mountain Honda EU2200i Kit offers the best overall value with its premium quality, easy installation, and excellent support for Honda owners. Budget-conscious buyers should consider the Duromax XP12000EH Kit at just $52.98 for model-specific needs.
When choosing a conversion kit, prioritize compatibility with your generator model, installation complexity matching your skill level, and fuel flexibility for your specific use case. Natural gas conversion eliminates fuel storage concerns and reduces long-term operating costs.
Invest in a quality kit that matches your generator and needs—the cleaner operation, extended runtime, and reduced maintenance will pay dividends for years to come.