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| Specification | DuroStar DS13000MXT | Firman T04073 |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Tri-Fuel | Tri-Fuel |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | Yes | No |
| Running watts | Winner: Winner: 10500 W | 4000 W |
| Starting watts | Winner: Winner: 13000 W | 5000 W |
| Noise (lower limit) | 74 dB | Winner: Winner: 67 dB |
| Weight | 211 lbs | Winner: Winner: 123.4 lbs |
| Run time @50% load | 8.5 h | Winner: Winner: 12 h |
| Run time @25% load | 17 h | 14 h |
| Fuel tank | 8.3 gal | 5 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 30.5 x 27.3 x 26 | 29.8 x 27.5 x 26.1 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240 |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | Not available | 11%-14% % |
| Engine | ||
| Engine | 500 cc OHV 4-stroke, cast iron sleeve | 223 cc OHV 4-stroke, cast iron sleeve |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Recoil, Electric |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 10500 W | 4000 W |
| Starting watts | 13000 W | 5000 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 | 8.5 h | 14 h |
| Run time @25% load | 17 h | Not available |
| Natural gas | Not available | Not available |
| Running watts | 9000 W | 3200 W |
| Starting watts | 11250 W | 4000 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 | Not available | Not available |
| Run time @25% load | Not available | Not available |
| Propane | Not available | Not available |
| Running watts | 10000 W | 3600 W |
| Starting watts | 12500 W | 4500 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 | 3.3 h | 9 h |
| Run time @25% load | 6.5 h | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | EPA, ANSI/PGMA G300-2023 | CARB, EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Not available | true |
| UPC | 811640017149 | 840876140734 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 10500 | 4000 |
| Running Watts (Propane) | 10000 | 3600 |
| Running Watts (Natural Gas) | 9000 | 3200 |
| Starting Watts (Gasoline) | 13000 | 5000 |
| Starting Watts (Propane) | 12500 | 4500 |
| Starting Watts (Natural Gas) | 11250 | 4000 |
| Runtime @ 50% Load (Gasoline) | 8.5 | 14 |
| Runtime @ 50% Load (Propane) | 3.3 | 9 |
| Runtime @ 25% Load (Gasoline) | 17 | Not available |
| Runtime @ 25% Load (Propane) | 6.5 | Not available |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R) GFCI; 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R) | 1x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke, cast iron sleeve | 223 cc OHV 4-stroke |
| Engine Displacement | 500 | 223 |
| Cylinder Sleeve | cast iron sleeve | cast iron |
| Alternator Winding Material | Copper windings | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 17 | Not available |
| Runtime @ 50% Load (Gasoline) | 8.5 | 14 |
| Runtime @ 50% Load (Propane) | 3.3 | 9 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection, CO monitoring | Low oil and overload protection, CO monitoring |
| Low Oil Protection | No | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Starting Components | Not available | Recoil, Electric |
| Included Accessories | Funnel, tool kit, key fob, battery charger, natural gas hose with NPT adapter, propane hose, battery, and wheel kit | Oil, funnel, tool kit, propane hose, RV adapter, cover, battery, and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | 3 | 3 |
| Additional specs | ||
| Summary | The DuroStar DS13000MXT is a 10,500-watt tri-fuel generator built for high-demand applications. Its tri-fuel capability (gasoline, propane, natural gas) and 13,000-watt starting capacity make it suitable for whole-house backup, RV power, and job-site work where fuel supply flexibility matters. | 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. |