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 H07552
- Ryobi RY906500S
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 H07552 | Ryobi RY906500S |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Dual-Fuel | Gasoline |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | Yes | No |
| Running watts | Winner: Winner: 7500 W | 6500 W |
| Starting watts | Winner: Winner: 9400 W | 8125 W |
| Noise (lower limit) | 74 dB | Winner: Winner: 72 dB |
| Weight | 212 lbs | Winner: Winner: 195 lbs |
| Run time @50% load | Winner: Winner: 12 h | 10 h |
| Run time @25% load | 12 h | Not available |
| Fuel tank | 8 gal | 6 gal |
| Fuel gauge | Yes | No |
| Approx. dimensions (L × W × H) | 30.2 x 27.5 x 26.3 | 39 x 29 x 24.5 |
| Electrical | ||
| Voltage (AC) | 120/240V 60 Hz | 120/240 |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 25 % | 20 % |
| Engine | ||
| Engine | 439 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve | 420 cc OHV 4-stroke |
| 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 | 7500 W | 6500 W |
| Starting watts | 9400 W | 8125 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 | 12 h | 10 h |
| Run time @25% load | Not available | Not available |
| Propane | Not available | Not available |
| Running watts | 6750 W | Not available |
| Starting watts | 8450 W | Not available |
| 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 | 5 h | Not available |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | false | false |
| Compliance | CARB, EPA | EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | true | Bonded to frame |
| UPC | 840876175521 | 46396023483 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 7500 | 6500 |
| Running Watts (Propane) | 6750 | Not available |
| Starting Watts (Gasoline) | 9400 | 8125 |
| Starting Watts (Propane) | 8450 | Not available |
| Runtime @ 50% Load (Gasoline) | 12 | 10 |
| Runtime @ 50% Load (Propane) | 5 | Not available |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R) | 2x Duplex 120V 20A (5-20R) GFCI1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke, cast iron sleeve | OHV 4-stroke |
| Engine Displacement | 439 | 420 |
| Cylinder Sleeve | cast iron sleeve | Not available |
| Engine Oil Type | 10W-30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 12 | 10 |
| Runtime @ 50% Load (Propane) | 5 | Not available |
| Safety & compliance | ||
| Overload Protection System | Not available | Low oil and overload protection, CO monitoring |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | No | Yes |
| Included equipment | ||
| Mobility Components | Yes | Not available |
| Included Accessories | Not available | Oil, tool kit, and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | Not available | 3 |
| Additional specs | ||
| Summary | The Firman H07552 is a 7500-watt dual-fuel generator built for job sites, home backup, and extended outdoor use. On gasoline, it delivers 9400 starting watts and 7500 running watts. Switch to propane and output drops to 8450 starting watts and 6750 running watts, a trade-off that extends fuel flexibility but reduces peak capacity. The 439cc cast-iron-sleeve engine runs on either fuel, giving users the ability to source power based on availability and cost. With an 8-gallon tank, this generator runs 12 hours at 25% load on gasoline or 5 hours on propane, meaning refueling intervals depend heavily on fuel choice and load demand.
This wattage class powers most household circuits simultaneously. A 7500-watt generator can run a central air conditioning unit (3500 watts), a water heater (4000 watts), and lighting circuits without overload. For contractors, it handles multiple power tools, compressors, and site lighting. The dual-fuel option appeals to users who want propane backup when gasoline becomes scarce or expensive, though the runtime penalty on propane means job-site users will refuel more frequently. | The Ryobi RY906500S is a 6,500-watt gasoline-powered portable generator equipped with a CO shutdown sensor for enhanced safety. It features a 6-gallon fuel tank providing up to 10 hours of runtime at 50% load, and includes multiple outlets for versatile power needs. |
- Most PowerfulFirman H075527500W running
- QuietestRyobi RY906500S72 dB
- Longest RuntimeFirman H0755212h at 50% load
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Firman H07552
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