Compare Generators Side-by-Side
Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.
- Firman T04073
- Predator 72903
Quick charts
Each chart uses its own Y-axis scale (so numbers are comparable within a chart).
Running watts
W
Starting watts
W
Noise
dB
Runtime @50%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
| Specification | Firman T04073 | Predator 72903 |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Tri-Fuel | Gasoline |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | No | No |
| Running watts | Winner: Winner: 4000 W | 1400 W |
| Starting watts | Winner: Winner: 5000 W | 1800 W |
| Noise (lower limit) | Winner: Winner: 67 dB | 68.9 dB |
| Weight | 123.4 lbs | Winner: Winner: 60 lbs |
| Run time @50% load | Winner: Winner: 12 h | 9.5 h |
| Run time @25% load | 14 h | Not available |
| Fuel tank | 5 gal | Not available |
| Fuel gauge | Yes | No |
| Approx. dimensions (L × W × H) | 29.8 x 27.5 x 26.1 | 18.3 x 14 x 16 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120V |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | Yes | No |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | No |
| THD | 11%-14% % | Not available |
| Engine | ||
| Engine | 223 cc OHV 4-stroke, cast iron sleeve | Not available |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Not available |
| Warranty | ||
| Warranty | 3 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 4000 W | Not available |
| Starting watts | 5000 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 | 14 h | Not available |
| 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 | Not available |
| Security | Not available | Not available |
| Spark arrestor | Yes | No |
| Neutral | true | Not available |
| UPC | 840876140734 | Not available |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 4000 | Not available |
| Running Watts (Propane) | 3600 | Not available |
| Running Watts (Natural Gas) | 3200 | Not available |
| Starting Watts (Gasoline) | 5000 | Not available |
| Starting Watts (Propane) | 4500 | Not available |
| Starting Watts (Natural Gas) | 4000 | Not available |
| Runtime @ 50% Load (Gasoline) | 14 | Not available |
| 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) | Not available |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | 223 cc OHV 4-stroke | Not available |
| Engine Displacement | 223 | 98 |
| Cylinder Sleeve | cast iron | Not available |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 14 | Not available |
| Runtime @ 50% Load (Propane) | 9 | Not available |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection, CO monitoring | Not available |
| Low Oil Protection | Yes | Yes |
| 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 | ||
| Commercial Warranty | 3 | Not available |
| 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 PREDATOR® 1800 Watt Portable Generator is a compact and lightweight gas-powered generator designed for low-power applications, featuring CO SECURE® carbon monoxide shutdown for enhanced safety. |
- Most PowerfulFirman T040734000W running
- QuietestFirman T0407367 dB
- Longest RuntimeFirman T0407312h at 50% load
Where to buy
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Firman T04073
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Predator 72903
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