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  • Firman W03383
  • Generac #7678 GP3600
  • Model W03383
    Model W03383

    Firman 3,300W Gas Generator

    3300W
    Running
    58 dB
    Noise
    View details
  • Model #7678 GP3600
    Model #7678 GP3600

    Generac 3,600W Gas Generator

    3600W
    Running
    0 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
SpecificationFirman W03383Generac #7678 GP3600
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesNo
Parallel capableYesNo
RV readyYesNo
Running watts
3300 W
Winner: Winner: 3600 W
Starting watts
3650 W
Winner: Winner: 4500 W
Noise (lower limit)
Winner: Winner: 58 dB
0 dB
Weight
Winner: Winner: 91 lbs
105 lbs
Run time @50% load
Not available
Winner: Winner: 9.3 h
Run time @25% load
9 h
Not available
Fuel tank
1.8 gal
3.7 gal
Fuel gaugeNoYes
Approx. dimensions (L × W × H)
23.2 x 17.8 x 17.9
24 x 22.5 x 21.3
Electrical
Voltage (AC)
120
120
Voltage (DC)
12
Not available
GFCI outletsNoNo
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
<3% %
Not available
Engine
Engine
193 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve
Generac OHV 4-stroke 212
Alternator
Not available
Not available
Starting system
Recoil, Electric, Remote
Recoil
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot availableNot available
Running watts
3300 W
3600 W
Starting watts
3650 W
4500 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
9.3 h
Run time @25% load
9 h
Not available
Other
Data center
Not available
Not available
Indicators
true
false
Compliance
CARB, EPA
CARB
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Not available
Not available
UPC
840876133835
696471074581
Core / High-priority specs
Running Watts (Gasoline)
3300
3600
Starting Watts (Gasoline)
3650
4500
Runtime @ 50% Load (Gasoline)
Not available
9.3
Runtime @ 25% Load (Gasoline)
9
Not available
AC Outlet Types
1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R)
2x Duplex 120V 20A (5-20R) 1x 120V 30A (L5-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
OHV 4-stroke
Engine Displacement
193
212
Cylinder Sleeve
cast iron sleeve
Not available
Engine Oil Type
Not available
10W-30 / SAE 30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
9
Not available
Runtime @ 50% Load (Gasoline)
Not available
9.3
Safety & compliance
Overload Protection System
Not available
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringNoNo
Included equipment
Mobility Components
Not available
Yes
Starting Components
Not available
Oil, funnel, tool kit, and wheel kit
Included Accessories
Oil, funnel, tool kit, key fob, battery charger, battery charging cables, and battery
Oil, funnel, tool kit, and wheel kit
Warranty & identification
Part Number
Not available
7678
Additional specs
Summary
The Firman W03383 is a 3300-watt inverter generator built around a 193cc OHV 4-stroke engine with a cast iron sleeve. At this wattage, it can run a refrigerator, microwave, and several lights simultaneously, or power essential household circuits during an outage. The inverter technology keeps total harmonic distortion below 3%, which protects laptops, smartphones, and other sensitive electronics from voltage spikes. This unit bridges the gap between lightweight portables and mid-range backup power, making it useful for both recreational trips and emergency home backup.
The Generac GP3600 (#7678) is a 3600-watt gasoline generator built for homeowners and job sites needing reliable backup or portable power. Its 4500-watt peak capacity handles starting surges for tools and appliances, while the 3.7-gallon fuel tank delivers 9.3 hours of runtime at half load. Automatic voltage regulation protects sensitive electronics, and a three-year warranty covers ownership support.
  • Most Powerful
    Generac #7678 GP3600
    3600W running
  • Quietest
    Firman W03383
    58 dB
  • Longest Runtime
    Generac #7678 GP3600
    9.3h at 50% load
Where to buy
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Firman W03383
Store links
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Generac #7678 GP3600
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