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| Specification | Firman T04073 | Mi-T-M GEN-2500-IMM1 |
|---|---|---|
| General | ||
| Product type | Generator | Not available |
| Fuel | Tri-Fuel | Gasoline |
| Inverter | No | Yes |
| Parallel capable | No | Yes |
| RV ready | No | No |
| Running watts | Winner: Winner: 4000 W | 2300 W |
| Starting watts | Winner: Winner: 5000 W | 2500 W |
| Noise (lower limit) | Winner: Winner: 67 dB | Winner: Winner: 67 dB |
| Weight | 123.4 lbs | Winner: Winner: 57 lbs |
| Run time @50% load | Winner: Winner: 12 h | 5 h |
| Run time @25% load | 14 h | Not available |
| Fuel tank | 5 gal | 1 gal |
| Fuel gauge | Yes | No |
| Approx. dimensions (L × W × H) | 29.8 x 27.5 x 26.1 | 21.50 x 13.40 x 19.30 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120 |
| Voltage (DC) | Not available | 12 |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | No |
| THD | 11%-14% % | 3 % |
| Engine | ||
| Engine | 223 cc OHV 4-stroke, cast iron sleeve | Mi-T-M OHV |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Not available |
| Warranty | ||
| Warranty | 3 years | 1 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 4000 W | 2300 W |
| Starting watts | 5000 W | 2500 W |
| Running amps (120V) | Not available | Not available |
| Running amps (240V) | Not available | Not available |
| Peak amps (120V) | Not available | Not available |
| Peak amps (240V) | Not available | Not available |
| Run time @50% load | 14 h | 5 h |
| Run time @25% load | Not available | Not available |
| Natural gas | Not available | Not available |
| Running watts | 3200 W | Not available |
| Starting watts | 4000 W | Not available |
| Running amps (120V) | Not available | Not available |
| Running amps (240V) | Not available | Not available |
| Peak amps (120V) | Not available | Not available |
| Peak amps (240V) | Not available | Not available |
| Run time @50% load | Not available | Not available |
| Run time @25% load | Not available | Not available |
| Propane | Not available | Not available |
| Running watts | 3600 W | Not available |
| Starting watts | 4500 W | Not available |
| Running amps (120V) | Not available | Not available |
| Running amps (240V) | Not available | Not available |
| Peak amps (120V) | Not available | Not available |
| Peak amps (240V) | Not available | Not available |
| Run time @50% load | 9 h | Not available |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | CARB, EPA, ANSI/PGMA G300-2023 | CARB Compliant |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | true | Not available |
| UPC | 840876140734 | Not available |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 4000 | 2300 |
| Running Watts (Propane) | 3600 | Not available |
| Running Watts (Natural Gas) | 3200 | Not available |
| Starting Watts (Gasoline) | 5000 | 2500 |
| Starting Watts (Propane) | 4500 | Not available |
| Starting Watts (Natural Gas) | 4000 | Not available |
| Runtime @ 50% Load (Gasoline) | 14 | 5 |
| Runtime @ 50% Load (Propane) | 9 | Not available |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R) | 120V 20A GFCI Duplex |
| Electrical & power | ||
| Frequency | 60 | Not available |
| Engine & construction | ||
| Engine Type | 223 cc OHV 4-stroke | Not available |
| Engine Displacement | 223 | 120 |
| Cylinder Sleeve | cast iron | Not available |
| Alternator Winding Material | Not available | Copper |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 14 | 5 |
| Runtime @ 50% Load (Propane) | 9 | Not available |
| Controls & display | ||
| Idle Control System | Not available | Idle control |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection, CO monitoring | Not available |
| Low Oil Protection | Yes | No |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Starting Components | Recoil, Electric | Not available |
| Included Accessories | Oil, funnel, tool kit, propane hose, RV adapter, cover, battery, and wheel kit | Not available |
| Warranty & identification | ||
| Residential Warranty | Not available | 1 |
| Commercial Warranty | 3 | Not available |
| Part Number | Not available | GEN-2500-IMM1 |
| Additional specs | ||
| Summary | The Firman T04073 is a 4,000-watt tri-fuel generator that runs on gasoline, propane, or natural gas. On gasoline, it delivers 5,000 starting watts and 4,000 running watts, enough to power a refrigerator, microwave, and multiple household circuits simultaneously. On propane, output drops to 3,600 running watts, and on natural gas it falls to 3,200 running watts. This fuel flexibility means users can switch between sources based on availability and cost, a significant advantage during extended outages or in remote locations where one fuel type may be scarce.
The T04073 targets homeowners, RV owners, and job site operators who need reliable backup power without the commitment to a single fuel source. Its 5-gallon tank runs for 14 hours at 25% load on gasoline, translating to roughly one week of emergency backup if you run it a few hours per day. The unit includes a wheel kit, making it easier to position despite its 123.4-pound weight. | The Mi-T-M GEN-2500-IMM1 is a 2300-watt gasoline inverter generator built for users who need portable backup power without sacrificing clean output. At 57 pounds, this unit bridges the gap between true portability and enough wattage to run multiple devices simultaneously. It can power essential appliances, power tools, and sensitive electronics like laptops during camping trips, tailgating events, or residential outages. The inverter technology keeps total harmonic distortion at 3 percent, which means laptops, TVs, and phone chargers stay protected from voltage spikes. Because the fuel tank holds only 1 gallon, refueling becomes part of the operating rhythm rather than a weekend-long concern. |