Propane Generator Conversion Kit: How to Convert Your Generator

What Is a Propane Generator Conversion Kit?

A propane generator conversion kit is a modification system that allows you to convert a gasoline-powered generator to run on propane instead. These kits are popular among homeowners and businesses that want flexibility in fuel options or prefer the cleaner-burning properties of propane.

Propane generators are more efficient in cold weather, produce fewer emissions, and propane fuel lasts longer in storage than gasoline. If you already own a gasoline generator, a conversion kit can be a cost-effective way to add this functionality without buying a new unit.

How Propane Generator Conversion Kits Work

A typical conversion kit includes a propane regulator, fuel lines, carburetor adapter, and connection fittings. The kit integrates between your propane tank and the generator’s fuel system, allowing the engine to burn propane instead of—or in addition to—gasoline.

Most conversion kits are dual-fuel designs, meaning your generator can run on either propane or gasoline. This gives you operational flexibility when one fuel is unavailable or less convenient to use.

Advantages of Converting to Propane

Longer Storage Life: Propane doesn’t degrade like gasoline. You can store propane indefinitely without fuel stabilizer or fuel replacement concerns.

Cold Weather Performance: Propane generators start more reliably in freezing temperatures compared to gasoline models.

Lower Emissions: Propane burns cleaner with fewer hydrocarbons and particulates, making it better for the environment and your equipment.

Cost Savings: In many regions, propane is cheaper than gasoline when bought in bulk, reducing long-term operating costs.

Fuel Availability: Propane is widely available at rural supply stores, hardware stores, and online retailers.

Disadvantages and Limitations

Power Output Reduction: Propane generators typically produce 10–15% less power than their gasoline equivalents. A generator rated 10kW on gasoline might produce only 8.5–9kW on propane.

Installation Complexity: Installing a conversion kit requires carburetor tuning or modifications. If done incorrectly, your generator may not run properly or may void its warranty.

Tank Space: Propane tanks take up more physical space than comparable gasoline storage. You may need a dedicated outdoor storage area.

Safety Hazard: Propane is highly flammable. Storage and handling must follow strict safety protocols.

Best Propane Generator Conversion Kits in 2026

LPG Propane Kit for Small Engines: Universal propane regulator kits designed for generators up to 7kW. Easy installation with clear instructions and includes all necessary fittings. Most users report successful conversions with minimal modification.

Dual-Fuel Carburetor Conversion Kit: Compatible with most small-engine generators, this kit includes a heavy-duty propane regulator and adjustable fuel lines. Popular for RV and portable generator conversions due to its reliability and customer support.

Professional-Grade Propane Kit: Heavy-duty conversion systems designed for standby generators and larger portable units. These kits maintain power output better than economy options and include professional installation guides.

How to Install a Propane Generator Conversion Kit

Step 1: Preparation — Read the kit’s manual completely. Disconnect your generator from power and ensure the fuel tank is empty.

Step 2: Remove the Air Filter and Carburetor — Locate your generator’s carburetor (usually mounted on the engine). Disconnect fuel lines and remove the carburetor assembly. This varies by generator model.

Step 3: Install the Propane Adapter — Attach the conversion kit’s carburetor adapter to the engine intake. This adapter allows the engine to accept propane fuel instead of gasoline.

Step 4: Connect Propane Lines — Run propane fuel lines from the adapter to your propane regulator and tank. Use the fittings provided in the kit. Check all connections for leaks with soapy water.

Step 5: Test and Adjust — Start the generator and allow it to warm up. Adjust the fuel mixture screw (typically on the carburetor) until the engine runs smoothly without surging or stalling.

Step 6: Safety Check — Verify that no propane is leaking from any connection. Test the generator under load (lights, tools) before relying on it for backup power.

Cost of Propane Conversion Kits

Budget propane conversion kits range from $150–$300 and work well for portable generators under 5kW. Mid-range kits (up to 10kW) cost $300–$600 and offer better durability and adjustability. Professional-grade kits for standby or larger generators run $600–$1,200 or more.

Installation costs vary. DIY installation saves $200–$400 in labor but requires mechanical skill. Professional installation typically costs $300–$600 depending on your generator model and local labor rates.

Can You Run a Generator on Propane Without a Conversion Kit?

No. Gasoline generators require a conversion kit or factory propane option to safely and effectively run on propane. Attempting to adapt propane to a gasoline-only generator without proper equipment is dangerous and will damage your engine.

If you want propane capability, buy either a factory-built dual-fuel generator or invest in a quality conversion kit.

Propane Tank Requirements for Generators

For portable generators, use standard 20–30-pound propane BBQ tanks. They’re convenient and widely available.

For standby generators, install a 100–500-pound propane tank or larger depending on your expected runtime. A 500-pound tank can fuel a 10kW generator for approximately 50 hours of continuous operation.

Always keep propane tanks in a well-ventilated outdoor location, away from living spaces and ignition sources.

Maintenance for Propane Generators

Change the oil every 50–100 hours of operation, similar to gasoline generators. Check propane lines monthly for cracks or leaks. Clean the fuel filter annually. In winter, drain the carburetor or add stabilizer to prevent gum buildup if you run on gasoline occasionally.

Is a Propane Conversion Kit Worth It?

A propane conversion kit is worthwhile if you:

• Already own a gasoline generator you want to upgrade
• Live in a region where propane is cheap and available
• Want backup power with minimal fuel maintenance
• Can handle basic mechanical installation or hire a professional
• Prefer longer fuel storage capability

If you’re buying a new generator and propane is important to you, purchasing a factory dual-fuel model is simpler and often more reliable than retrofitting with a conversion kit.

Frequently Asked Questions

Will a conversion kit void my generator’s warranty? Typically yes. Check your manufacturer’s warranty documentation before installing any conversion kit.

Can I switch between propane and gasoline easily? Some dual-fuel conversion kits include a selector valve for easy switching. Manual switching (switching fuel lines) is possible but less convenient.

How long will propane fuel last in a generator? A 20-pound propane tank typically runs a 5kW generator for 8–10 hours at 50% load. Runtime doubles if you reduce load.

Conclusion

Propane generator conversion kits offer an affordable way to add fuel flexibility and long-term storage capability to your existing gasoline generator. However, they require careful installation and reduce power output slightly. For most homeowners, a factory dual-fuel generator is worth the upfront cost because it avoids installation headaches and warranty concerns. If you already own a reliable gasoline generator and want to upgrade it, a quality conversion kit is a solid investment.