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 WH02942
- Yamaha EF3000iS
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 @25%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
| Specification | Firman WH02942 | Yamaha EF3000iS |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Dual-Fuel | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | No |
| RV ready | Yes | No |
| Running watts | Winner: Winner: 2900 W | 2800 W |
| Starting watts | Winner: Winner: 3200 W | 3000 W |
| Noise (lower limit) | 58 dB | Winner: Winner: 54.5 dB |
| Weight | Winner: Winner: 90 lbs | 136 lbs |
| Run time @50% load | Not available | Not available |
| Run time @25% load | 10 h | Winner: Winner: 18.6 h |
| Fuel tank | 1.8 gal | 3.4 gal |
| Fuel gauge | No | Yes |
| Approx. dimensions (L × W × H) | 23.2 x 17.8 x 17.9 | 26.8 x 17.5 x 21.9 |
| Electrical | ||
| Voltage (AC) | 120 60 | 120 |
| Voltage (DC) | 12 | Not available |
| GFCI outlets | No | No |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 3 % | Not available |
| Engine | ||
| Engine | Firman Max-Pro Series OHV 4-stroke, cast iron sleeve | 171 cc Yamaha MZ175 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 | 2900 W | 2800 W |
| Starting watts | 3200 W | 3000 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 | Not available |
| Run time @25% load | 10 h | 18.6 h |
| Propane | Not available | Not available |
| Running watts | 2600 W | Not available |
| Starting watts | 2900 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 | Not available | Not available |
| Run time @25% load | 19 h | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | CARB, EPA | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | Floating |
| UPC | 840876130810 | 810856030645 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 2900 | 2800 |
| Running Watts (Propane) | 2600 | Not available |
| Starting Watts (Gasoline) | 3200 | 3000 |
| Starting Watts (Propane) | 2900 | Not available |
| Runtime @ 25% Load (Gasoline) | 10 | 18.6 |
| Runtime @ 25% Load (Propane) | 19 | Not available |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R) | AC outlets1x Duplex 120V 20A (5-20R)1x 120V 30A (L5-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke, cast iron sleeve | Yamaha MZ175 OHV 4-stroke |
| Engine Displacement | 171 | 171 |
| Cylinder Sleeve | Cast iron sleeve | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 10 | 18.6 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | No | Yes |
| Included equipment | ||
| Starting Components | Recoil, Electric | Not available |
| Included Accessories | Oil, funnel, tool kit, battery charger, propane hose, and battery | Battery charging cables |
| Warranty & identification | ||
| Commercial Warranty | Not available | 3 |
| Part Number | WH3200iE | Not available |
| Additional specs | ||
| Summary | The Firman WH02942 is a 2,900-watt dual-fuel inverter generator built for users who need portable power without sacrificing runtime flexibility. On gasoline, it delivers 2,900 running watts and 3,200 starting watts. Switch to propane and the running output drops to 2,600 watts, but runtime at 25% load stretches to 19 hours versus 10 hours on gas. This makes it a practical choice for RV owners, campers, and homeowners seeking backup power that can run all night on a single fuel source. The 3% THD output means laptops, phones, and sensitive electronics stay protected from power surges. At 58 dB, it runs quieter than most job sites and many competitors, making it suitable for campgrounds and residential areas. | The Yamaha EF3000iS is a 3000-watt inverter generator designed for quiet operation and portability, featuring advanced technologies like Smart Throttle and Noise Block, and backed by a 3-year limited warranty. |
- Most PowerfulFirman WH029422900W running
- QuietestYamaha EF3000iS54.5 dB
- Longest Runtimeh at 50% load
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Firman WH02942
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Yamaha EF3000iS
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