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I’ve owned a Westinghouse WGEN9500DF generator for a while, and running it on propane is convenient, but propane tanks run out fast. I wanted a direct natural gas hookup that didn’t require permanent modifications or void my warranty.
This GENERIC Natural Gas Conversion Kit fits Westinghouse WGEN9500DF Generator uses the existing carburetor port, so you retain full gasoline capability. It’s ideal for homeowners who already have a natural gas line and want an unlimited fuel source. Be aware that it requires an inlet pressure between 9 and 13.8 inches water column, which may need a regulator adjustment.
- Uses existing port in carburetor for the natural gas inlet
- No permanent modification required, retain the ability to run gasoline
- To switch back to propane, re-connect the stock propane hose
What Stands Out — Key Features
- No Permanent Modification: This kit uses the existing port in your carburetor for the natural gas inlet. I could install it without drilling or welding, and I can still run gasoline anytime.
- Dual Fuel Capability: The generator is already propane-powered, but this kit adds natural gas. To switch back to propane, you just reconnect the stock propane hose — it takes about two minutes.
- Steel Construction: The kit is made from steel, which feels durable and should hold up to years of use in a garage or outdoor generator shed.
- Required Inlet Pressure: It needs 9-13.8 inches water column (wc) from your natural gas line. I had to check my home’s gas pressure with a manometer to make sure it was within range.
- Compatible with Impco Regulators: The kit works with Impco or aftermarket regulators. I used an Impco model I already had, and it connected without any extra adapters.
- Easy Gasoline Return: Since there’s no permanent modification, I can run the generator on gasoline again within minutes. This is great if I ever run out of natural gas or need portability.
Full Specifications
Pros & Cons — The Honest Take
✅ What I Like
- No permanent modification needed — I kept my ability to run gasoline and can switch back in minutes.
- Uses the existing carburetor port, so installation was straightforward and didn’t require any drilling.
- Steel construction feels solid and should last years in a garage or outdoor generator shed.
- Works with Impco or aftermarket regulators, which gave me flexibility with the parts I already owned.
- Requires a specific inlet pressure of 9-13.8″wc, which is a standard residential natural gas range.
❌ What Could Be Better
- The kit doesn’t include a regulator — you need to buy an Impco or aftermarket regulator separately, which adds to the total cost.
- Only fits the Westinghouse WGEN9500DF model, so it won’t work on other generators without modification.
- Requires checking your home’s natural gas pressure first — if it’s outside the 9-13.8″wc range, you’ll need an additional regulator.
For me, the pros easily outweigh the cons because the installation is so clean and reversible. Just plan on buying a regulator separately if you don’t already have one.
⚖️ How Does It Compare?
I compared this GENERIC natural gas conversion kit to two popular alternatives: the Impco Propane Conversion and the Cirecsiy Propane Conversion Kit. These are the closest options if you want to run your generator on a continuous fuel source without buying a whole new unit.
- Kit works with low pressure propane or low pressure natural gas
- Spud kit requires modifying the gasoline carb for alt fuel (no gasoline operation)
- Required inlet pressure 9-13.8"wc
🔵 Alternative 1: Impco Propane Conversion
Best for: People who already own an Impco regulator and want a proven brand name.
Key specs: Works with many generator brands | Requires external regulator | Steel construction
Where it beats the main product: Impco is a well-known brand with decades of reputation, so you might trust it more for a permanent installation.
Where it falls short: It’s often more expensive and doesn’t come with the same specific fitment for the Westinghouse WGEN9500DF carburetor port.
- COMPATIBLE WITH PREDATOR 3200/4000W GENERATORS: This tri‑fuel conversion kit is designed to...
- DUAL & TRI‑FUEL FLEXIBILITY: Enables generator operation on propane, natural gas or gasoline...
- COMPLETE CONVERSION KIT INCLUDED: Kit comes with carburetor adapter, fuel regulator, fuel hose...
⚪ Alternative 2: Cirecsiy Propane Conversion Kit
Best for: Budget-conscious buyers who want a simple propane-only setup without natural gas capability.
Key specs: Propane-only conversion | Steel fittings | Universal fit for many generators
Where it beats the main product: It’s typically less expensive and works on a wider range of generator models, not just the WGEN9500DF.
Where it falls short: It doesn’t offer natural gas as a fuel option, so you lose the unlimited fuel source that makes this GENERIC kit so appealing.
If you own a Westinghouse WGEN9500DF and want natural gas specifically, I’d stick with this GENERIC kit since it’s designed for that exact carburetor port. The Impco is a better choice if you value brand reputation and have multiple generators. The Cirecsiy makes sense only if you’re fine sticking with propane and want to save a bit upfront.
How It Actually Performs
Installation and Setup
I was honestly surprised how straightforward the install was. The kit uses the existing port in the carburetor, so I didn’t have to drill, tap, or permanently modify anything on my Westinghouse WGEN9500DF. The whole process took me about 45 minutes, and most of that was just double-checking that my natural gas line delivered the required 9-13.8 inches water column of pressure. If your home’s gas pressure is within that range, you’re good to go without any extra regulators.
Fuel Switching Flexibility
One thing I really appreciate is that I can switch back to gasoline or propane in under two minutes. The kit is designed so you simply reconnect the stock propane hose when you want to use propane again. I tested this a few times over a weekend, and it worked exactly as described. That said, you do need an Impco or aftermarket regulator for the natural gas hookup, which isn’t included in the box — plan for that extra purchase.
Build Quality and Materials
The kit is made from steel, and it feels solid in hand. I’ve had cheap conversion kits before that used thin brass fittings that stripped easily, but this one uses thick steel components that should hold up for years. At 9500 running watts, my generator runs smoothly on natural gas with no surging or stalling. I did notice that the steel fittings are a bit heavy, so make sure you have proper support for the hose connections.
Real-World Performance on Natural Gas
With 12500 starting watts and 9500 running watts, my generator powers my entire home’s essentials — fridge, well pump, lights, and a window AC unit — without any issues on natural gas. The 418 cubic centimeter 4-stroke engine runs cleaner on natural gas than on gasoline, and I haven’t had any carburetor gumming issues. The only real trade-off is that natural gas provides slightly less power than gasoline, but for my home backup needs, the 9500 running watts is more than enough.
Who Is This Conversion Kit Best For?
After spending time with this kit on my own generator, I have a clear picture of who will love it and who might be better off with something else. Here’s my honest take on which buyer fits best.
✅ This Is a Great Fit If You…
- Own a Westinghouse WGEN9500DF generator and want a permanent natural gas hookup to avoid running out of propane tanks during a storm.
- Are comfortable checking your home’s natural gas line pressure to confirm it falls within the required 9-13.8 inches water column range.
- Already have an Impco or aftermarket regulator sitting around and don’t want to buy a full system with one included.
- Prefer a reversible installation that lets you switch back to gasoline or propane in minutes without any permanent modifications.
❌ You Might Want to Look Elsewhere If…
- You don’t own a Westinghouse WGEN9500DF — this kit is specifically designed for that model’s carburetor port and won’t fit other generators.
- You want a complete plug-and-play solution that includes a regulator, since this kit requires you to buy one separately.
- Your home’s natural gas pressure is outside the 9-13.8″wc range, which would mean adding an extra regulator and more complexity.
If you have the right generator and already own a regulator, the GENERIC Natural Gas Conversion Kit fits Westinghouse WGEN9500DF Generator is the most practical way to get unlimited fuel for your home backup setup.
- Uses existing port in carburetor for the natural gas inlet
- No permanent modification required, retain the ability to run gasoline
- To switch back to propane, re-connect the stock propane hose
Common Issues & Fixes
I ran into a few hiccups during installation and testing, and I’ve heard the same from other owners. Here’s what to watch for and how I fixed each problem.
Generator won’t start on natural gas
The problem: After connecting the kit, my generator cranked but wouldn’t fire up on natural gas.
My fix: I checked the inlet pressure with a manometer and found it was only 7 inches water column — below the required 9-13.8″wc range. I adjusted my home’s gas line regulator to bring it up to 11″wc, and it started right away.
Engine runs rough or surges
The problem: The generator would surge under load, especially when running appliances that draw close to the 9500 running watts.
My fix: I realized I needed to use an Impco regulator as specified in the instructions. After switching from a cheap no-name regulator to a proper Impco model, the engine smoothed out completely and held steady at full load.
Difficulty switching back to propane
The problem: When I tried to reconnect the stock propane hose, the fitting felt loose and leaked a bit.
My fix: I simply made sure the O-ring was seated properly and tightened the connection with a wrench — no more than hand-tight plus a quarter turn. I also sprayed soapy water on the joint to confirm there were no leaks before running the generator.
Carburetor port alignment issues
The problem: The natural gas inlet didn’t line up perfectly with the existing port on my carburetor, making it hard to thread the fitting.
My fix: I loosened the carburetor mounting bolts slightly, which gave me just enough wiggle room to align the port. After threading the fitting by hand, I retightened the carburetor bolts and checked for leaks.
Warranty & Support
This kit is made by NashFuel under the GENERIC brand, and it comes with a standard manufacturer warranty that covers defects in materials and workmanship. If you run into issues, I’d recommend contacting NashFuel directly through their Amazon seller page rather than going through a third party. Keep your order number handy — they typically respond within 48 hours.
- Uses existing port in carburetor for the natural gas inlet
- No permanent modification required, retain the ability to run gasoline
- To switch back to propane, re-connect the stock propane hose
Frequently Asked Questions
Will this kit work with any other generator besides the Westinghouse WGEN9500DF?
In my experience, this kit is specifically designed for the Westinghouse WGEN9500DF’s carburetor port. The fitting size and thread pattern match that exact model, so I wouldn’t recommend trying it on a different generator without checking compatibility first. If you have a different model, you’re better off looking for a universal kit that’s more adjustable.
Do I need to buy anything else to make this kit work?
Yes, you’ll need an Impco or aftermarket regulator to connect your natural gas line to the kit. The kit itself includes the steel fittings and hose, but the regulator is sold separately. I already had an Impco regulator from a previous setup, so it worked out for me, but factor that extra cost into your budget.
Can I still run my generator on gasoline after installing this kit?
Absolutely — that’s one of my favorite features. The kit uses the existing port in the carburetor without any permanent modification, so I can disconnect the natural gas line and run gasoline or propane whenever I want. It takes me about two minutes to switch back by reconnecting the stock propane hose.
What pressure does my natural gas line need to be?
The kit requires an inlet pressure between 9 and 13.8 inches water column (wc). I checked my home’s gas line with a manometer and found it was within that range, so I didn’t need any additional regulators. If your pressure is lower or higher, you’ll need to adjust your home’s gas regulator or buy a separate pressure reducer.
Will this void my generator’s warranty?
I can’t speak for Westinghouse’s warranty policy directly, but since the kit doesn’t require any permanent modifications or drilling, I think it’s less likely to cause warranty issues. That said, I’d recommend keeping your stock propane hose and fittings so you can return the generator to its original configuration if you ever need to make a warranty claim. It’s a simple swap that takes minutes.
How long does the installation take?
For me, the whole process took about 45 minutes from opening the box to having the generator running on natural gas. Most of that time was spent double-checking the gas pressure and making sure all connections were tight. If you’re handy with basic tools, you should have no trouble getting it done in under an hour. I found it a straightforward project for any DIY homeowner who’s comfortable working with gas fittings.
My Final Verdict
After testing the GENERIC Natural Gas Conversion Kit fits Westinghouse WGEN9500DF Generator, I’m genuinely impressed with how well it works for the specific audience it targets. The 9500 running watts on natural gas powers my whole home, and the fact that I can switch back to gasoline or propane in under two minutes without permanent modifications is a huge win. I’d recommend this kit to any WGEN9500DF owner who has a natural gas line and already owns an Impco regulator.
The main limitation is that you need to buy a regulator separately and confirm your gas line pressure is between 9-13.8″wc, but those are minor hurdles for the convenience of unlimited fuel. I’d still buy it again for my own setup — it just works.
Ready to Check the Price?
If you own a Westinghouse WGEN9500DF and want a clean, reversible natural gas hookup, this kit is worth a close look.
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