
Firman P03503 vs Honda EG5000CL
Comparing the Firman P03503 and Honda EG5000CL generators. The Firman is lighter with longer runtime, while the Honda delivers nearly 1000 more running watts.
- Firman P03503
- Honda EG5000CL
Comparison Overview
The biggest difference between these two conventional generators is power output. The Honda EG5000CL delivers 4500 running watts and 5000 starting watts, giving it a significant edge over the Firman P03503's 3550 running watts and 4450 starting watts. That's roughly 27% more continuous power from the Honda, which matters when you're running multiple appliances or heavy-draw tools simultaneously.
The Firman fights back in portability and endurance. At 108.5 pounds, it's considerably easier to move than the Honda's 173 pounds, a difference of nearly 65 pounds. The Firman also runs longer on a tank, delivering 14 hours at 50% load compared to the Honda's 11 hours. Both generators produce moderate noise, with the Firman slightly quieter at 67 dB versus the Honda's 70 dB. Neither is an inverter generator, so sensitive electronics should be used with caution on both units. Both carry a 3-year warranty.
Buyers who need more raw power and trust Honda's legendary engine reliability will lean toward the EG5000CL, while those who prioritize a lighter, longer-running, and slightly quieter unit for moderate power needs will find the Firman P03503 a compelling choice at a typically lower price point.
Key takeaways
- Honda EG5000CL delivers 4500 running watts, nearly 1000 more than the Firman's 3550
- Firman P03503 weighs 108.5 lbs, roughly 65 pounds lighter than the Honda at 173 lbs
- Firman runs 14 hours at half load compared to Honda's 11 hours
- Firman operates at 67 dB, slightly quieter than the Honda's 70 dB
- Both carry a 3-year warranty and run on gasoline only
- Neither is an inverter generator, so sensitive electronics need extra protection
Best use cases
Choose the Firman P03503 if you need a generator that's manageable to transport and offers solid runtime for moderate power demands. At 108.5 pounds, it's realistic for one person to load into a truck bed, making it a practical option for tailgating, occasional camping base camps, or light-duty job site work. Its 14-hour runtime at half load means fewer fuel stops during extended outages or long workdays. With 3550 running watts, you can comfortably power a few essential household circuits during an outage, including a refrigerator, lights, a sump pump, and a phone charger. It's also a reasonable pick for running a circular saw or small air compressor on a job site, though you'll want to check the starting watt requirements of your specific tools before committing.
Choose the Honda EG5000CL if your power needs are higher and you're less concerned about weight. The 4500 running watts open up the ability to run more appliances simultaneously during a home power outage, potentially including a small window AC unit alongside your refrigerator and other essentials. On a job site, the extra wattage gives you more headroom for demanding power tools or running two tools at once. Honda's reputation for engine durability and long-term reliability is a real factor if you plan to use this generator frequently over many years. The tradeoff is significant, though. At 173 pounds, this is a two-person lift, and it's best suited for situations where it stays relatively stationary once placed. The shorter 11-hour runtime at half load means you'll refuel more often, which adds up during multi-day outages.
Both generators lack inverter technology, so neither is ideal for directly powering laptops, gaming consoles, or other sensitive electronics without a surge protector or separate inverter.
Verdict & recommendation
If your priority is having enough power to cover a broader range of appliances and tools, the Honda EG5000CL's 4500 running watts give it a clear advantage. It's the better fit for serious home backup duty or demanding job site use where you need that extra capacity. If portability, longer runtime, and a lighter price tag matter more to you, the Firman P03503 handles moderate power needs well while being significantly easier to move and more fuel-efficient at half load.
Neither generator is a bad choice. They simply serve different scales of need. Think honestly about what you'll actually plug in at the same time, how often you'll need to move the unit, and whether Honda's brand reputation justifies the extra cost and weight for your situation. Match the generator to your realistic power demands, and either one will serve you well.
Last updated April 15, 2026
| Specification | Firman P03503 | Honda EG5000CL |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | Yes | No |
| Running watts | 3550 W | Winner: Winner: 4500 W |
| Starting watts | 4450 W | Winner: Winner: 5000 W |
| Noise (lower limit) | Winner: Winner: 67 dB | 70 dB |
| Weight | Winner: Winner: 108.5 lbs | 173 lbs |
| Run time @50% load | Winner: Winner: 14 h | 11 h |
| Run time @25% load | Not available | Not available |
| Fuel tank | 5 gal | 6.3 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 24.8 x 21.7 x 21.7 | 26.8 x 22.8 x 22.6 |
| Electrical | ||
| Voltage (AC) | 120 | 120/240V 60 Hz |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | No | Yes |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | Yes |
| THD | Not available | Not available |
| Engine | ||
| Engine | 208 cc OHV 4-stroke, cast iron sleeve. | Honda GX390 OHV 4-stroke, cast iron sleeve |
| Alternator | Not available | Not available |
| Starting system | Recoil | Recoil |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | Not available | Not available |
| Starting watts | 4450 W | 5000 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 | 14 h | 11 h |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | false |
| Compliance | EPA, ANSI/PGMA G300-2023 | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | true |
| UPC | 840876135037 | 786102004343 |
| Core / High-priority specs | ||
| Starting Watts (Gasoline) | 4450 | 5000 |
| Runtime @ 50% Load (Gasoline) | 14 | 11 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R)1x 120V 30A (L5-30R)1x 120V 30A (TT-30R) | 2x Duplex 120V 20A (5-20R) GFCI 1x 120V 30A (L5-30R) 1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke, cast iron sleeve | Honda GX390 OHV 4-stroke |
| Engine Displacement | 208 | 389 |
| Cylinder Sleeve | cast iron | cast iron sleeve |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 14 | 11 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | No |
| Included equipment | ||
| Included Accessories | Oil, funnel, tool kit, cover, and wheel kit | Not available |
| Warranty & identification | ||
| Commercial Warranty | 3 | Not available |
| Part Number | Not available | EG5000CLAT1 |
| Additional specs | ||
| Summary | 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. | The Honda EG5000CL is a reliable generator featuring a 389cc Honda GX390 engine, delivering 5000W maximum and 4500W rated power. It offers a 6.3-gallon fuel tank, providing up to 11 hours of runtime at half load, and operates at 73 dB noise level. |
- Most PowerfulHonda EG5000CL4500W running
- QuietestFirman P0350367 dB
- Longest RuntimeFirman P0350314h at 50% load


