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| Specification | Briggs & Stratton 30742 | Firman P03503 |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | No | Yes |
| Running watts | Winner: Winner: 8000 W | 3550 W |
| Starting watts | Winner: Winner: 10000 W | 4450 W |
| Noise (lower limit) | 0 dB | Winner: Winner: 67 dB |
| Weight | 246 lbs | Winner: Winner: 108.5 lbs |
| Run time @50% load | 9 h | Winner: Winner: 14 h |
| Run time @25% load | Not available | Not available |
| Fuel tank | 7.5 gal | 5 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 28.4 x 30.5 x 29.1 | 24.8 x 21.7 x 21.7 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120 |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | Yes | No |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | Not available | Not available |
| Engine | ||
| Engine | Briggs & Stratton OHV 4-stroke | 208 cc OHV 4-stroke, cast iron sleeve. |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Recoil |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 8000 W | Not available |
| Starting watts | 10000 W | 4450 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 | 9 h | 14 h |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | false | true |
| Compliance | EPA | EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Bonded to frame | Floating |
| UPC | 11675307424 | 840876135037 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 8000 | Not available |
| Starting Watts (Gasoline) | 10000 | 4450 |
| Runtime @ 50% Load (Gasoline) | 9 | 14 |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R) GFCI; 1x 120/240V 30A (L14-30R) | 1x Duplex 120V 20A (5-20R)1x 120V 30A (L5-30R)1x 120V 30A (TT-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | Briggs & Stratton OHV 4-stroke | OHV 4-stroke, cast iron sleeve |
| Engine Displacement | 420 | 208 |
| Cylinder Sleeve | Not available | cast iron |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 9 | 14 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection, CO monitoring | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Starting Components | Recoil, Electric | Not available |
| Included Accessories | Oil, battery, and wheel kit | Oil, funnel, tool kit, cover, and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | 3 | 3 |
| Additional specs | ||
| Summary | The Briggs & Stratton 30742 is an 8,000-watt gasoline generator built for job sites and home backup power. Its 10,000-watt peak output handles motor startup surges, while the dual-voltage 120/240V configuration powers both household circuits and heavy equipment like air compressors or welders. | The Firman P03503 is a 3,550-watt gasoline generator built around a 208cc OHV 4-stroke engine with a cast iron sleeve. This wattage handles mid-range household loads: a refrigerator, microwave, and several outlets running simultaneously, or a modest RV power setup. The 5-gallon fuel tank delivers 14 hours of runtime at 50% load, meaning a full tank covers a typical overnight camping trip or a daytime power outage without refueling. The 4,450 starting watts give it enough surge capacity to turn on air conditioning compressors or well pumps, making it practical for both emergency backup and recreational use. |