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.
- Briggs & Stratton 30742
- Genmax GM5500i
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 | Briggs & Stratton 30742 | Genmax GM5500i |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | No | Yes |
| Parallel capable | No | No |
| RV ready | No | No |
| Running watts | Winner: Winner: 8000 W | 5000 W |
| Starting watts | Winner: Winner: 10000 W | 5500 W |
| Noise (lower limit) | 0 dB | Winner: Winner: 62 dB |
| Weight | 246 lbs | Winner: Winner: 116.6 lbs |
| Run time @50% load | Winner: Winner: 9 h | 8.5 h |
| Run time @25% load | Not available | 13 h |
| Fuel tank | 7.5 gal | 3.5 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 28.4 x 30.5 x 29.1 | 21.1 x 18.5 x 24 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240 |
| Voltage (DC) | Not available | 5 |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | No |
| THD | Not available | ≤3% % |
| Engine | ||
| Engine | Briggs & Stratton OHV 4-stroke | 312 cc OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Recoil, Electric |
| Warranty | ||
| Warranty | 3 years | 1 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 8000 W | 5000 W |
| Starting watts | 10000 W | 5500 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 | 8.5 h |
| Run time @25% load | Not available | 13 h |
| 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 | true |
| UPC | 11675307424 | 768494055455 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 8000 | 5000 |
| Starting Watts (Gasoline) | 10000 | 5500 |
| Runtime @ 50% Load (Gasoline) | 9 | 8.5 |
| Runtime @ 25% Load (Gasoline) | Not available | 13 |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R) GFCI; 1x 120/240V 30A (L14-30R) | 2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | Briggs & Stratton OHV 4-stroke | Dinking OHV 4-stroke |
| Engine Displacement | 420 | 312 |
| Engine Oil Type | Not available | SAE 10W/30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | Not available | 13 |
| Runtime @ 50% Load (Gasoline) | 9 | 8.5 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection, CO monitoring | Low oil and overload protection |
| Low Oil Protection | Yes | No |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Starting Components | Recoil, Electric | Not available |
| Included Accessories | Oil, battery, and wheel kit | Funnel, tool kit, and battery |
| Warranty & identification | ||
| Commercial Warranty | 3 | Not available |
| 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 Genmax GM5500i is a 5,000-watt gasoline inverter generator built around a 312cc OHV engine. It delivers enough continuous power for multiple household appliances, power tools, and sensitive electronics simultaneously. Because it uses inverter technology, the GM5500i produces power clean enough for laptops, gaming consoles, and medical devices, a trait that separates it from conventional open-frame generators at similar wattage levels. |
- Most PowerfulBriggs & Stratton 307428000W running
- QuietestGenmax GM5500i62 dB
- Longest RuntimeBriggs & Stratton 307429h at 50% load
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Briggs & Stratton 30742
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