Firman W01781 vs Generac 2500i
What is the difference?
The Firman W01781 has 1.7 kW of running power, 2.1 kW peak. The Generac 2500i has 2.2 kW of running power, 2.5 kW peak.
The Firman W01781 runs 9 h at half load, the Generac 2500i runs 4.5 h at half load. The Firman W01781 runs longer on a tank.
The Firman W01781 has a 0.9 gal tank, the Generac 2500i has a 1 gal tank.
The Firman W01781 weighs 46 lb, the Generac 2500i weighs 49 lb. The Firman W01781 is easier to carry.
Specs side by side
| Firman W01781 | Generac 2500i | |
|---|---|---|
| Running W | 1700 | 2200 |
| Peak W | 2100 | 2500 |
| Fuel | gasoline | — |
| Tank (gal) | 0.9 | 1 |
| Run time @50 % (h) | 9 | 4.5 |
| Noise (dB) | 59 | — |
| CO shutoff | — | yes |
| Weight (lb) | 46 | 49 |
| Warranty (yr) | 3 | — |
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Specs as read from manufacturer pages on 2026-10-30 / 2026-10-26. Specs one maker does not list are left out of the comparison. Sponsored links; we may earn a commission.
Common questions
Which has more running watts, Firman W01781 or Generac 2500i?
The Generac 2500i. More running watts: 2200 W vs 1700 W.
Which is lighter, Firman W01781 or Generac 2500i?
The Firman W01781. Lighter: 46 lb vs 49 lb.
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Compare other models → · All Firman models · All Generac models