Portable FIRMAN Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT generator with yellow and blue exterior, featuring multiple outlets, control panel, CO Alert technology, and wheels.
Promotional image of the FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, highlighting key features like 5000 starting watts, 4000 running watts, 19l tank, and
Promotional image for the FIRMAN T04073 Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT featuring icons of included accessories: battery, padded u-shaped handle, never flat wheels, hose, tool kit, engine oil.
A Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT from FIRMAN Power Equipment set in front of a rustic barn surrounded by green grass and logs.
A blue FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT on wheels, with various sockets and dials, operates outdoors while a man works in the background.
Blue and black FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, featuring yellow wheels, multiple outlets, and a control panel.
Illustration of a FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT electrical control panel with labels for switches, meters, and signs including CO Alert technology and shutdown instructions.
Promotional image featuring a FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, displayed with bonus items including a cover, L5-30P to TT-30R adapter, and hose holder.
Front view of a FIRMAN Power Equipment T04073 Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT and sturdy wheels on a white background.
FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, featuring black and yellow casing, wheels, visible engine components, against a white background.
Rear view of a FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT on wheels, showing its exposed engine and various operational components.
Blue and yellow FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT on white background, featuring multiple outlets and control panel.
A FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, mounted on a black frame with wheels, against a striped gray background.
A FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, with a black frame, yellow accents, and wheels, displayed against a striped white background.
A portable FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT on wheels with a blue and yellow case, featuring multiple outlets and dials on a control panel.
Man refueling a FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT outdoors next to a fence-lined field.
A person outdoors connects a battery to a FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, displaying various outlets and control buttons.
Blue and yellow FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, featuring labeled dimensions of 25.7", 21.6", and 21.8".
Portable FIRMAN Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT generator with yellow and blue exterior, featuring multiple outlets, control panel, CO Alert technology, and wheels.
Promotional image of the FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, highlighting key features like 5000 starting watts, 4000 running watts, 19l tank, and
Promotional image for the FIRMAN T04073 Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT featuring icons of included accessories: battery, padded u-shaped handle, never flat wheels, hose, tool kit, engine oil.
A Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT from FIRMAN Power Equipment set in front of a rustic barn surrounded by green grass and logs.
A blue FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT on wheels, with various sockets and dials, operates outdoors while a man works in the background.
Blue and black FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, featuring yellow wheels, multiple outlets, and a control panel.
Illustration of a FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT electrical control panel with labels for switches, meters, and signs including CO Alert technology and shutdown instructions.
Promotional image featuring a FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, displayed with bonus items including a cover, L5-30P to TT-30R adapter, and hose holder.
Front view of a FIRMAN Power Equipment T04073 Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT and sturdy wheels on a white background.
FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, featuring black and yellow casing, wheels, visible engine components, against a white background.
Rear view of a FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT on wheels, showing its exposed engine and various operational components.
Blue and yellow FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT on white background, featuring multiple outlets and control panel.
A FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, mounted on a black frame with wheels, against a striped gray background.
A FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, with a black frame, yellow accents, and wheels, displayed against a striped white background.
A portable FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT on wheels with a blue and yellow case, featuring multiple outlets and dials on a control panel.
Man refueling a FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT outdoors next to a fence-lined field.
A person outdoors connects a battery to a FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, displaying various outlets and control buttons.
Blue and yellow FIRMAN Power Equipment Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT, featuring labeled dimensions of 25.7", 21.6", and 21.8".
01/01
Certification: Certification CARB Certification cETL Certification EPA
Model: t04073

Tri Fuel Portable Generator 4000W Electric Start 120/240V with CO ALERT
$959.99 USD
Free Shipping on all Generators
SERIES Hybrid
TYPE Open Frame Generator

Safe, powerful, and versatile are what our portable generators are known for at FIRMAN.

The FIRMAN T04073 Tri-Fuel portable generator delivers quality power-on-demand — running on gasoline, natural gas, and propane.

The T04073 features our latest CO Alert technology that is built for safety. The CO Alert units will shut down as soon as harmful levels of carbon monoxide are detected.

At FIRMAN, safety is our number one priority.

It's an ideal solution for a home backup power, camper van, and other recreational events.

Please note a propane tank is not included with this.

The T04073 comes with an engine oil bottle, oil funnel, spark plug wrench, a double open-ended wrench (10mm,12mm), LPG regulator with hose holder, cover and adaptor.

LEGENDARY FIRMAN ENGINEERING

  • 223cc tri fuel engine
  • Recoil start 
  • Electric start 
  • Low oil shut off
  • Cast iron sleeve
  • Running watts 4000W (GAS), 3600W (LPG), 3200W (NG)
  • Starting watts 5000W (GAS), 4500W (LPG). 4000W (NG)
  • 120/240 volts

PERFORMANCE IN A LEAGUE OF ITS OWN

  • Runs on gasoline, propane, and natural gas
  • 5-gallon tank
  • Up to 14 hours of run time at 25% load
  • Weight: 129 lbs
  • 67dB at ¼ load

FEATURES YOU EXPECT FROM FIRMAN

3-year warranty

Multi-featured control panel with covered outlets

  • 1 x 5-20R 120V 20A DUPLEX GFCI
  • 1 x L5-30R 120V 30A TWIST LOCK
  • 1 x L14-30R 120V/240V 30A TWIST LOCK
ENGINEERED IN THE USA

FIRMAN generators are made to endure every condition from cold winter nights to hot summer days to everything in between.

Industry-Leading Warranty

New FIRMAN generators are backed by a 3-year warranty. Refurbished generators have a limited 90 day warranty

Customer Support

Our skilled technicians located in Peoria, AZ are available 7 days a week to provide the support you need when you need it most. 

5000/4000

Gas

4500/3600

Liquid Propane

4000/3200

Natural Gas

5 Gallon Tank

12Hr Run Time

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Manuals

T04073 Manual English

download

T04073 Manual Spanish

download

T04073 Manual French

download

T04073 QSSG English

download

T04073 QSSG Spanish

download

T04073 QSSG French

download

Watch

CO Alert Overview

Watch

T04073 Unboxing

Watch

T04073 Maintenance

Watch

T04073 Overview

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