Firman WT06073
Generator. Specs from the manufacturer page (checked ).

The Firman WT06073 is a tri-fuel inverter generator that runs on gasoline, LPG, or natural gas, with 6000 running watts and 7500 starting watts on gasoline. It delivers clean inverter power with less than 3% THD and has a 5.3-gallon tank with up to 13 hours of runtime at 25% load.
Key features
- Tri-fuel: runs on gasoline, LPG, or natural gas; 6000 W running and 7500 W peak on gasoline, 6750/5400 W on LPG, 5600/4500 W on natural gas
- Powered by a 322cc FIRMAN engine with a cast-iron sleeve
- Less than 3% THD clean inverter output
- Outlets: 50A 120/240V (14-50R), 30A 120V RV (TT-30R), 30A 120/240V twist-lock (L14-30R), USB-A and USB-C ports
- Electric start with recoil backup
- 5.3-gallon tank; up to 13 hours runtime at 25% load
- CO Alert shutoff, spark arrestor, and low-oil shutdown
- 8-inch flat-free wheels and folding U-handle
What it is for
- Home backup
- RV
- Jobsite
Specifications
| Running watts | 6000 W |
|---|---|
| Peak / surge | 7500 W |
| Fuel | tri-fuel |
| Tank | 20.1 L (5.3 gal) |
| Noise | 67 dB |
| CO shutoff | Yes |
| AC output voltage | 120/240V |
| Weight | 59.4 kg (131.0 lb) |
| Warranty | 4 years |
From the Firman page. Values the manufacturer does not publish are left out.
What is in the box
- Engine oil bottle
- Oil funnel
- Tool kit
- LPG regulator
- Quick oil drain
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Connection and wiring
Follow the diagrams in the Firman manual. Connecting to a home panel needs a transfer switch or interlock and a licensed electrician.
Error codes and troubleshooting
| Code | Meaning | What to do | Manual page |
|---|---|---|---|
| Circuit Breakers | The receptacles are protected by an AC circuit protector that trips if the generator is overloaded or an external short circuit occurs. | Disconnect all electrical loads and determine the cause before using the generator again. If overloading caused the trip, reduce the load. Reset by pressing the protector button. Continuous tripping may damage the generator or equipment. | 8 |
| Oil Warning Indicator Light | Indicates the oil has fallen below the minimum level. The engine stops automatically and will not start until the proper amount of oil is in the crankcase. | Check the oil level when this light turns on. Add the proper amount of engine oil to the crankcase before attempting to start the engine. | 8 |
| Overload Indicator Light | Connected devices have exceeded the generator's wattage or amperage capacity, or a power surge occurred. The AC Power light goes off, the engine keeps running, and power to the receptacles is cut. | Keep the total power drawn from all receptacles within the nameplate rating. | 8 |
| Circuit Breaker | The receptacles are protected by an AC circuit protector that trips if the generator is overloaded or an external short circuit occurs. | Disconnect all electrical loads and find the cause before using the generator again. If overloading caused the trip, reduce the load. Reset by pressing the button on the protector. Continuous tripping may damage the generator or equipment. | 9 |
| Output Ready | Stays on during normal operation. Turns off when the generator is overloaded. | — | 9 |
| AC Reset | The inverter has entered a protective state and AC output is interrupted. | Press the AC Reset Button to restore the output. | 12 |
6 of 13 codes. From the Firman manual. All 13 WH03242 / T09371 / H07553 / W03083 codes →
FAQ
Can the Firman WT06073 start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 7500 W peak. That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.