Description
Ultimate Fuel Flexibility in a Compact Package
The Firman T04073 delivers 5,000 peak watts and 4,000 running watts with tri-fuel capability, operating seamlessly on gasoline, propane, or natural gas. Featuring CO Alert technology for automatic shutdown during dangerous carbon monoxide levels, this generator combines versatile power with advanced safety features in a lightweight 125-lb design. Perfect for home backup, camping, and job sites, it offers ultra-quiet 67 dBA operation and up to 14 hours of runtime.
Key Features & Benefits
Tri-Fuel Power Performance
✔ 3 Fuel Options – Runs on:
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Gasoline: 5,000W peak / 4,000W running (14 hrs runtime)
-
Propane: 4,500W peak / 3,600W running
-
Natural Gas: 4,000W peak / 3,200W running
✔ 223cc OHV Engine – Cast iron sleeve and low oil shutdown for durability
✔ Extended Runtime – Up to 14 hours on gasoline (5-gallon tank)
✔ Clean Power Output – 11-14% THD – safe for sensitive electronics
Smart Operation & Safety
✔ CO Alert Technology – Automatic shutdown at dangerous CO levels
✔ Electric Start with Recoil Backup – Battery included for easy ignition
✔ PowerStream™ Alternator – Delivers stable voltage regulation
✔ Low Oil Shutdown – Protects engine from damage
Portable & User-Friendly
✔ Lightweight Design – Only 125 lbs with 8" never-flat wheels
✔ Folding Handle with Grip – Comfortable maneuvering
✔ Ultra-Quiet Operation – 67 dBA (quieter than conversation)
Professional Connectivity
✔ Multiple Outlet Options:
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(1) 120/240V 30A (L14-30R) – Transfer switch compatible
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(1) 120V 30A (L5-30R) – For RVs and heavy appliances
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(1) 120V 20A GFCI – Safe for household electronics
Technical Specifications
Power Output Comparison
| Fuel Type |
Peak Watts |
Running Watts |
Runtime |
| Gasoline |
5,000W |
4,000W |
14 hours |
| Propane |
4,500W |
3,600W |
Varies |
| Natural Gas |
4,000W |
3,200W |
Varies |
Electrical Specifications
| Feature |
Details |
| Voltage |
120/240V |
| Frequency |
60 Hz |
| THD |
11-14% |
| Noise Level |
67 dBA |
| Outlets |
1x L14-30R, 1x L5-30R, 1x 20A GFCI |
Engine & Fuel System
| Feature |
Details |
| Engine Type |
223cc 4-Stroke OHV |
| Starting System |
Electric + Recoil Backup |
| Fuel Tank Capacity |
5 gallons (Gasoline) |
| Natural Gas Connection |
Requires external hose |
| Oil Capacity |
Not specified (check manual) |
Dimensions & Weight
| Feature |
Details |
| Dimensions (LxWxH) |
24" x 22" x 20" (approximate) |
| Weight |
125 lbs |
| Wheels |
8" Never-Flat |
Certifications & Warranty
| Feature |
Details |
| EPA Certified |
Yes |
| CARB Compliant |
Yes |
| cETL Listed |
Yes |
| ANSI/PGMA G300-2018 |
Yes |
| Warranty |
3-Year Limited |
Why Choose the Firman T04073?
✅ Tri-Fuel Flexibility – Never stranded without power
✅ CO Safety Feature – Automatic shutdown protection
✅ Ultra-Quiet Operation – 67 dBA (library-quiet)
✅ Lightweight & Portable – Easy to move at 125 lbs
✅ Ready-to-Run – Includes oil, funnel, and tools
Perfect For:
-
Home Backup (Refrigerators, lights, medical devices)
-
Camping & RVing (L5-30R outlet included)
-
Job Sites (Power tools, compressors)
-
Natural Gas Hookup – Permanent backup power option
Includes:
