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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 P03613
  • Predator 72912
  • Model P03613
    Model P03613

    Firman 3,650W Gas Generator

    3650W
    Running
    67 dB
    Noise
    View details
  • Model 72912
    Model 72912

    Predator 3,500W Gas Generator

    3500W
    Running
    72.5 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 P03613Predator 72912
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyYesNo
Running watts
Winner: Winner: 3650 W
3500 W
Starting watts
Winner: Winner: 4550 W
4375 W
Noise (lower limit)
Winner: Winner: 67 dB
72.5 dB
Weight
108.5 lbs
Winner: Winner: 107 lbs
Run time @50% load
14 h
Winner: Winner: 16 h
Run time @25% load
Not available
Not available
Fuel tank
5 gal
Not available
Fuel gaugeYesNo
Approx. dimensions (L × W × H)
24.8 x 21.7 x 21.7
23.3 x 18.6 x 19.23
Electrical
Voltage (AC)
120
120/240V
Voltage (DC)
Not available
Not available
GFCI outletsNoNo
Covered outletsYesNo
Automatic Voltage RegulationYesNo
THD
25 %
Not available
Engine
Engine
208 Firman Max-Pro Series OHV 4-stroke, cast iron sleeve
Not available
Alternator
Not available
Not available
Starting system
Recoil
Not available
Warranty
Warranty
3 years
Not available
Power by fuel
GasolineNot availableNot available
Running watts
3650 W
Not available
Starting watts
4550 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
14 h
Not available
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
true
true
Compliance
CARB, EPA, ANSI/PGMA G300-2023
Not available
Security
Not available
Not available
Spark arrestorYesNo
Neutral
Floating
Not available
UPC
840876136133
Not available
Core / High-priority specs
Running Watts (Gasoline)
3650
Not available
Starting Watts (Gasoline)
4550
Not available
Runtime @ 50% Load (Gasoline)
14
Not available
AC Outlet Types
1x Duplex 120V 20 (5-20R); 1x 120V 30 (L5-30R); 1x 120V 30 (TT-30R)
Not available
Electrical & power
Frequency
60
Not available
Engine & construction
Engine Type
Firman Max-Pro Series OHV 4-stroke
Not available
Engine Displacement
208
212
Cylinder Sleeve
Cast iron sleeve
Not available
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
14
Not available
Safety & compliance
Overload Protection System
Low oil and overload protection
Not available
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Included Accessories
Oil, funnel, tool kit, and wheel kit
Not available
Warranty & identification
Commercial Warranty
3
Not available
Additional specs
Summary
The Firman P03613 delivers 3650 running watts from a 208cc gasoline engine, making it capable of powering multiple household appliances simultaneously or running job site tools continuously. At this wattage level, users can operate a refrigerator, microwave, and several power tools at once, or run an RV's air conditioning and appliances during camping trips. The 4550 peak watts handle the startup surge of compressors and motors. Because the unit runs on gasoline, fuel is readily available at any gas station, and the 5-gallon tank stretches runtime to 14 hours at half load, meaning users can power a job site or campsite through a full workday without refueling. The 67 decibel noise level sits between a vacuum cleaner and normal conversation, allowing operation in residential neighborhoods without excessive disruption. Inclusion of a wheel kit and 108.5 pound weight means this generator requires some effort to move but remains transportable for most users.
The PREDATOR® 4375 Watt Portable Generator is designed for home backup during emergencies and powering tools at jobsites. It features a 212cc engine, CO SECURE® carbon monoxide shutdown for safety, and offers a runtime of up to 16 hours at 50% load.
  • Most Powerful
    Firman P03613
    3650W running
  • Quietest
    Firman P03613
    67 dB
  • Longest Runtime
    Predator 72912
    16h at 50% load
Where to buy
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Firman P03613
Store links
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Predator 72912
Store links
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