Compare Generators Side-by-Side
Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.
- Firman W03386
- Ford FG7750BiSRCO
Quick charts
Each chart uses its own Y-axis scale (so numbers are comparable within a chart).
Running watts
W
Starting watts
W
Noise
dB
Runtime @50%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
| Specification | Firman W03386 | Ford FG7750BiSRCO |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Dual-Fuel |
| Inverter | Yes | Yes |
| Parallel capable | Yes | Yes |
| RV ready | Yes | Yes |
| Running watts | 3300 W | Winner: Winner: 6600 W |
| Starting watts | 3650 W | Winner: Winner: 7750 W |
| Noise (lower limit) | Winner: Winner: 58 dB | 62 dB |
| Weight | Winner: Winner: 91 lbs | 133.4 lbs |
| Run time @50% load | Not available | Winner: Winner: 8 h |
| Run time @25% load | 9 h | Not available |
| Fuel tank | 1.8 gal | 3.96 gal |
| Fuel gauge | No | Yes |
| Approx. dimensions (L × W × H) | 23.2 x 17.8 x 17.9 | 27 x 20.8 x 21.7 |
| Electrical | ||
| Voltage (AC) | 120 | 120/240V 60 Hz |
| Voltage (DC) | 12 | 5 |
| GFCI outlets | No | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | <3% % | 3 % |
| Engine | ||
| Engine | 193 cc OHV 4-stroke, cast iron sleeve. | 298 cc OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Recoil, Electric, Remote |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 3300 W | 6600 W |
| Starting watts | 3650 W | 7750 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 | 8 h |
| Run time @25% load | 9 h | Not available |
| Propane | Not available | Not available |
| Running watts | Not available | 5950 W |
| Starting watts | Not available | 6975 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 | 7 h |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | CARB, EPA | CARB, EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | true |
| UPC | 840876133866 | 814726029838 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3300 | 6600 |
| Running Watts (Propane) | Not available | 5950 |
| Starting Watts (Gasoline) | 3650 | 7750 |
| Starting Watts (Propane) | Not available | 6975 |
| Runtime @ 50% Load (Gasoline) | Not available | 8 |
| Runtime @ 50% Load (Propane) | Not available | 7 |
| Runtime @ 25% Load (Gasoline) | 9 | Not available |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R) | 1x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 50A (14-50R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 193 | 298 |
| Cylinder Sleeve | cast iron sleeve | Not available |
| Engine Oil Type | See 'Add Engine Oil' Section | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 9 | Not available |
| Runtime @ 50% Load (Gasoline) | Not available | 8 |
| Runtime @ 50% Load (Propane) | Not available | 7 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection, CO monitoring |
| Low Oil Protection | Yes | No |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Included Accessories | Oil, funnel, tool kit, key fob, battery charger, battery charging cables, and battery | Oil, funnel, tool kit, key fob, battery charger, propane hose, and battery |
| Warranty & identification | ||
| Commercial Warranty | 3 | Not available |
| Additional specs | ||
| Summary | The Firman W03386 is a 3,300-watt inverter generator built for RV camping, emergency backup, and light job site work. Its 3,650-watt peak capacity handles startup surges from air conditioning units, refrigerators, and power tools without strain. Because the unit runs on gasoline with a 1.8-gallon tank, users get up to 9 hours of runtime at 25% load before refueling. The inverter topology and sub-3% THD output means laptops, smartphones, and sensitive electronics charge safely without voltage spikes that damage circuitry. At 58 dB, it operates at conversational volume, making it acceptable for residential neighborhoods and campgrounds where noise restrictions apply. This is a mid-sized workhorse for users who need portable power without the weight penalty of larger stationary units. | The Ford FG7750BiSRCO is a 6,600-watt dual-fuel inverter generator that bridges the gap between portable and stationary power. It runs household appliances, power tools, and RV equipment simultaneously, making it suitable for whole-house backup, job sites, and extended camping. Dual-fuel operation lets owners switch between gasoline and propane based on fuel availability and storage needs. The 3 percent THD output protects laptops, phones, and sensitive electronics from voltage damage. At 62 decibels, it operates quietly enough for residential areas and campgrounds. |
- Most PowerfulFord FG7750BiSRCO6600W running
- QuietestFirman W0338658 dB
- Longest RuntimeFord FG7750BiSRCO8h at 50% load
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Firman W03386
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