Firman W03383 vs WEN 56477i
What is the difference?
The Firman W03383 has 3.3 kW of running power, 3.65 kW peak. The WEN 56477i has 4 kW of running power, 4.8 kW peak.
Both run on gasoline.
The Firman W03383 has a 1.8 gal tank, the WEN 56477i has a 1.9 gal tank.
Both have a 3-year warranty.
Both have 120 V AC output.
Specs side by side
| Firman W03383 | WEN 56477i | |
|---|---|---|
| Running W | 3300 | 4000 |
| Peak W | 3650 | 4800 |
| Fuel | gasoline | gasoline |
| Tank (gal) | 1.8 | 1.9 |
| Run time @50 % (h) | — | 7 |
| Noise (dB) | — | 62 |
| CO shutoff | — | — |
| Weight (lb) | 901 | — |
| Warranty (yr) | 3 | 3 |
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Specs as read from manufacturer pages on 2026-10-26 / 2026-10-27. 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 W03383 or WEN 56477i?
The WEN 56477i. More running watts: 4000 W vs 3300 W.