Generac iQ5200
3900 W, dual-fuel
Firman T04073
Generator · Tri-Fuel. Specs from the manufacturer page (checked ).
The FIRMAN T04073 is a tri-fuel portable generator that runs on gasoline, propane (LPG), or natural gas. It produces 4,000 running watts and 5,000 starting watts on gasoline, and its 5-gallon fuel tank provides up to 14 hours of runtime at 50% load.
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Running
4000W
Peak / surge
5000W
Fuel
tri-fuel
Run time @50 %
14h
CO shutoff
Yes
Key features
- Runs on gasoline, propane (LPG), or natural gas
- Gasoline: 4,000 running W / 5,000 starting W; propane: 3,600 running W / 4,500 starting W; natural gas: 3,200 running W / 4,000 starting W
- 5-gallon fuel tank with up to 14 hours of runtime at 50% load
- 223cc FIRMAN engine with electric start and recoil backup
- Low oil shutoff
- FIRMAN CO Alert shuts down the generator if unsafe carbon monoxide levels are detected
- Outlets: 120V 20A GFCI duplex (5-20R), 120V 30A twist-lock (L5-30R), 120/240V 30A twist-lock (L14-30R)
What it is for
- Home backup power
- RVs and camper vans
- Outdoor events
Specifications
| Running watts | 4000 W |
|---|---|
| Peak / surge | 5000 W |
| Fuel | tri-fuel |
| Tank | 18.9 L (5.0 gal) |
| Run time at 50 % load | 14 h |
| CO shutoff | Yes |
| AC output voltage | 120/240V |
From the Firman page. Values the manufacturer does not publish are left out.
What is in the box
- Engine oil bottle
- Oil funnel
- Spark plug wrench
- Double open-ended wrench (10mm, 12mm)
- LPG regulator with hose holder, cover and adaptor
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WEN DF475T
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Anker SOLIX Smart Generator 5500
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Firman T04073 comparisons
- T04073 vs Generac iQ5200
- T04073 vs WEN GN5602X
- T04073 vs WEN DF480iX
- T04073 vs WEN DF475T
- T04073 vs Anker SOLIX Smart Generator 5500
On our lists
Connection and wiring
Follow the diagrams in the Firman manual. Connecting to a home panel needs a transfer switch or interlock and a licensed electrician.
- Wiring diagram, manual page 2 →
- Wiring diagram, manual page 40 →
- Wiring diagram, manual page 41 →
- Wiring diagram, manual page 42 →
- Wiring diagram, manual page 43 →
Error codes and troubleshooting
We found no error-code table in this manual. Its troubleshooting section is the reference.
FAQ
How long does the Firman T04073 run on a tank?
The maker rates it at 14 hours at 50 % load (about 2,000 W) on a 5.0-gal tank. A light load such as a refrigerator and lights runs longer; a full load runs shorter.
Can the Firman T04073 start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 5000 W peak. That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.