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Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.

  • ECHO EGi-4000
  • Firman H03655
  • Model EGi-4000
    Model EGi-4000

    ECHO 3,400W Gas Generator

    3400W
    Running
    67 dB
    Noise
    View details
  • Model H03655
    Model H03655

    Firman 3,650W Dual-Fuel Generator

    3650W
    Running
    67 dB
    Noise
    View details
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).
Generator Specifications Comparison
SpecificationECHO EGi-4000Firman H03655
General
Product type
Generator
Generator
Fuel
Gasoline
Dual-Fuel
InverterYesNo
Parallel capableNoNo
RV readyYesYes
Running watts
3400 W
Winner: Winner: 3650 W
Starting watts
4000 W
Winner: Winner: 4550 W
Noise (lower limit)
Winner: Winner: 67 dB
Winner: Winner: 67 dB
Weight
Winner: Winner: 86 lbs
112 lbs
Run time @50% load
10 h
Winner: Winner: 14 h
Run time @25% load
Not available
Not available
Fuel tank
3.3 gal
5 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
27 x 18.8 x 24
25.7 x 21.8 x 21.6
Electrical
Voltage (AC)
120
120V 60 Hz
Voltage (DC)
5
Not available
GFCI outletsNoNo
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
Not available
25 %
Engine
Engine
212 cc OHV 4-stroke
208 cc OHV 4-stroke, cast iron sleeve
Alternator
Not available
Not available
Starting system
Recoil
Recoil
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot availableNot available
Running watts
3400 W
3650 W
Starting watts
4000 W
4550 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
10 h
14 h
Run time @25% load
Not available
Not available
PropaneNot availableNot available
Running watts
Not available
3300 W
Starting watts
Not available
4100 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
Not available
Not available
Other
Data center
Not available
Not available
Indicators
false
false
Compliance
CARB
EPA, ANSI/PGMA G300-2023
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
Floating
UPC
743184017579
840876136553
Core / High-priority specs
Running Watts (Gasoline)
3400
3650
Running Watts (Propane)
Not available
3300
Starting Watts (Gasoline)
4000
4550
Starting Watts (Propane)
Not available
4100
Runtime @ 50% Load (Gasoline)
10
14
AC Outlet Types
1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-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
OHV 4-stroke
208 cc OHV 4-stroke, cast iron sleeve
Engine Displacement
212
208
Cylinder Sleeve
Not available
cast iron sleeve
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
10
14
Safety & compliance
Overload Protection System
Not available
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Starting Components
Not available
Oil, funnel, tool kit, propane hose, and wheel kit
Included Accessories
Wheel kit
Oil, funnel, tool kit, propane hose, and wheel kit
Warranty & identification
Residential Warranty
Not available
3
Commercial Warranty
Not available
3
Additional specs
Summary
The ECHO EGi-4000 is a 3,400-watt inverter generator built around a 212 cc OHV 4-stroke engine. This wattage class handles essential household appliances during outages, job site tools, and RV systems. The 4,000-watt peak capacity means it can start larger equipment like air compressors or circular saws without stalling. Because the unit runs on gasoline with a 3.3-gallon tank, users will find refueling cycles manageable for weekend trips or short-term backup scenarios. The inverter technology protects laptops, phones, and other sensitive electronics from power fluctuations. A 10-hour runtime at 50% load means users can operate mid-range loads like a refrigerator or power tools for most of a workday without refueling. The 86-pound weight and included wheel kit make it movable for one person, though not effortless.
The Firman H03655 is a 3,650-watt dual-fuel generator built around a 208 cc OHV 4-stroke engine with a cast iron sleeve. Running on gasoline, it delivers 4,550 starting watts and 3,650 running watts. Switch to propane and output drops to 4,100 starting watts and 3,300 running watts. This power level runs a refrigerator, microwave, window air conditioner, or multiple power tools simultaneously. The dual-fuel flexibility means you can operate on whichever fuel is available, a practical advantage during extended outages or when propane storage is more convenient than gasoline. At 67 dB at quarter load, the H03655 operates quietly enough for residential neighborhoods without disturbing neighbors. The 5-gallon tank delivers 14 hours of runtime at 50 percent load on gasoline, translating to roughly one full day of moderate use before refueling. The RV-ready configuration and included wheel kit position this unit as a go-anywhere power source for camping, job sites, and home backup scenarios.
  • Most Powerful
    Firman H03655
    3650W running
  • Quietest
    ECHO EGi-4000
    67 dB
  • Longest Runtime
    Firman H03655
    14h at 50% load
Where to buy
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ECHO EGi-4000
Store links
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Firman H03655
Store links
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