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| Specification | Firman W02981 | Yamaha EF2800i |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | No |
| RV ready | Yes | No |
| Running watts | Winner: Winner: 2900 W | 2500 W |
| Starting watts | Winner: Winner: 3200 W | 2800 W |
| Noise (lower limit) | Winner: Winner: 58 dB | 65 dB |
| Weight | 84 lbs | Winner: Winner: 68 lbs |
| Run time @50% load | Not available | Not available |
| Run time @25% load | 10 h | Winner: Winner: 14.7 h |
| Fuel tank | 1.8 gal | 2.6 gal |
| Fuel gauge | No | Yes |
| Approx. dimensions (L × W × H) | 23.2 x 17.8 x 17.9 | 19.2 x 15.6 x 16.7 |
| Electrical | ||
| Voltage (AC) | 120 | 120 |
| Voltage (DC) | 12 | 12 |
| GFCI outlets | No | Yes |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 3 % | 2.5 % |
| Engine | ||
| Engine | 171 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve | Yamaha MZ175 OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil | Recoil |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 2900 W | 2500 W |
| Starting watts | 3200 W | 2800 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 | 10 h | 14.7 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | CARB, EPA | EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | Not available |
| UPC | 840876129814 | 799530396645 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 2900 | 2500 |
| Starting Watts (Gasoline) | 3200 | 2800 |
| Runtime @ 25% Load (Gasoline) | 10 | 14.7 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R) | 1x Duplex 120V 20A (5-20R) GFCI1x 120V 30A (L5-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | Firman Max-Pro Series OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 171 | 171 |
| Cylinder Sleeve | cast iron sleeve | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 10 | 14.7 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Not available |
| Low Oil Protection | Yes | Yes |
| Included equipment | ||
| Included Accessories | Oil, funnel, tool kit, and battery charging cables | Not available |
| Warranty & identification | ||
| Commercial Warranty | 3 | Not available |
| Additional specs | ||
| Summary | The Firman W02981 is a 2,900-watt inverter generator built around a 171cc Max-Pro Series OHV 4-stroke engine with a cast iron sleeve. This wattage runs a refrigerator, microwave, and several household circuits simultaneously, or powers a small RV setup with air conditioning. The 1.8-gallon fuel tank delivers 10 hours of runtime at 25% load, meaning light-duty operation stretches a single tank across a full workday or camping trip. At 58 decibels, it operates quietly enough for residential neighborhoods and campgrounds. The 3% THD output protects laptops, phones, and sensitive electronics from voltage spikes that damage circuits. Weighing 84 pounds with a wheel kit included, it sits at the threshold between portable and stationary, requiring two hands or a dolly for regular movement. | The Yamaha EF2800i is a lightweight and quiet inverter generator capable of powering a range of devices, from power tools to sensitive electronics, making it suitable for home backup, job sites, and on-the-go use. |