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  • Firman T08072
  • Sportsman GEN9000DF
  • Model T08072
    Model T08072

    Firman 8,000W Tri-Fuel Generator

    8000W
    Running
    74 dB
    Noise
    View details
  • Model GEN9000DF
    Model GEN9000DF

    Sportsman 8,000W Dual-Fuel Generator

    8000W
    Running
    80 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 T08072Sportsman GEN9000DF
General
Product type
Generator
Generator
Fuel
Tri-Fuel
Dual-Fuel
InverterNoNo
Parallel capableNoNo
RV readyYesYes
Running watts
Winner: Winner: 8000 W
Winner: Winner: 8000 W
Starting watts
Winner: Winner: 10000 W
9000 W
Noise (lower limit)
Winner: Winner: 74 dB
80 dB
Weight
213 lbs
Winner: Winner: 200 lbs
Run time @50% load
Winner: Winner: 12 h
10 h
Run time @25% load
12 h
Not available
Fuel tank
8 gal
8 gal
Fuel gaugeYesNo
Approx. dimensions (L × W × H)
29.8 x 27.5 x 26.1
29.5 x 23 x 20.5
Electrical
Voltage (AC)
120/240
120/240
Voltage (DC)
Not available
Not available
GFCI outletsYesYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
Not available
Not available
Engine
Engine
439 cc OHV 4-stroke.
420 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric
Recoil, Electric
Warranty
Warranty
3 years
1 years
Power by fuel
GasolineNot availableNot available
Running watts
8000 W
8000 W
Starting watts
10000 W
9000 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
12 h
10 h
Run time @25% load
Not available
Not available
Natural gasNot availableNot available
Running watts
5500 W
Not available
Starting watts
6900 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
Not available
Not available
PropaneNot availableNot available
Running watts
7250 W
7200 W
Starting watts
9050 W
8100 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
5 h
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
true
false
Compliance
CARB, EPA, ANSI/PGMA G300-2023
EPA
Security
Not available
Not available
Spark arrestorYesNo
Neutral
Bonded to frame.
Not available
UPC
840876180723
27077801606
Core / High-priority specs
Running Watts (Gasoline)
8000
8000
Running Watts (Propane)
7250
7200
Running Watts (Natural Gas)
5500
Not available
Starting Watts (Gasoline)
10000
9000
Starting Watts (Propane)
9050
8100
Starting Watts (Natural Gas)
6900
Not available
Runtime @ 50% Load (Gasoline)
12
10
Runtime @ 50% Load (Propane)
Not available
5
AC Outlet Types
1x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R)
2x Duplex 120V 20A (5-20R) GFCI; 1x 120/240V 30A (L14-30R); 1x 120V 30A (TT-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
439 cc OHV 4-stroke
OHV 4-stroke
Engine Displacement
439
420
Cylinder Sleeve
Cast iron sleeve
Not available
Engine Oil Type
Not available
SAE10W-30
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
12
10
Runtime @ 50% Load (Propane)
Not available
5
Safety & compliance
Overload Protection System
Low oil and overload protection.
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesNo
Included equipment
Mobility Components
Yes
Not available
Starting Components
Not available
Recoil; Electric
Included Accessories
Oil, funnel, tool kit, natural gas hose with NPT adapter, propane hose, battery, and wheel kit.
Tool kit, propane hose, battery charging cables, and wheel kit
Warranty & identification
Commercial Warranty
3
1
Additional specs
Summary
The Firman T08072 is an 8,000-watt tri-fuel generator built for users who need flexibility across fuel sources and sustained power output. Running on gasoline, propane, or natural gas, this unit delivers 10,000 peak watts on startup, enough to handle simultaneous demands like air compressors, power tools, and household appliances. The tri-fuel capability means users can switch fuels based on availability and cost, a significant advantage for job sites, RV travel, or emergency backup where fuel supply chains vary. On gasoline, the T08072 runs at full 8,000 watts. On propane, output drops to 7,250 watts. On natural gas, it falls to 5,500 watts. This tiered output reflects the energy density of each fuel type and shapes what users can realistically power during extended outages or remote work. The 8-gallon tank delivers 12 hours of runtime at both 25% and 50% load on gasoline, meaning users can operate a moderate load overnight without refueling. For job sites and backup power scenarios, this runtime eliminates mid-shift fuel stops.
The Sportsman GEN9000DF is a dual fuel generator capable of delivering 9000 surge watts and 8000 running watts, powered by a 15.0 HP 4-Stroke OHV engine. It offers both recoil and electric start options and includes multiple outlets for versatile use.
  • Most Powerful
    Firman T08072
    8000W running
  • Quietest
    Firman T08072
    74 dB
  • Longest Runtime
    Firman T08072
    12h at 50% load
Where to buy
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Firman T08072
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Sportsman GEN9000DF
Store links
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