WE ARE PROUD TO BE INDEPENDENT AND IN NO WAY ASSOCIATED WITH MANUFACTURERS. TO STAY UNBIASED, WE DO NOT ACCEPT FREE PRODUCTS. WE EARN FROM ADVERTISING FEES PAID BY HOME DEPOT OR WALMART ON QUALIFYING PURCHASES.

Firman T04073 - 4000/5000W Tri Fuel Generator

The Firman T04073 is a portable open frame tri-fuel generator with a rated wattage of 4,000 W and a starting wattage of 5,000 W.

CompareShortlistShortlistedRemoved from shortlist 5

Firman T04073Firman T04073Firman T04073Firman T04073
Set Price Alert
×
Notify me when the price drops
Set an alert for the Firman T04073 - Current lowest price: $899.00

Description

Zoom on the Firman T04073

In summary, the Firman T04073 is a portable generator especially useful for:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • People occasionally participating in outdoor fairs, festivals or events
  • Homeowners in need of an emergency backup power for their essentials
  • Professionals in need of safely powering high-intensity work or lighting equipment

In the following paragraphs, we shall explore the power characteristics, available outlets, portability, and any additional features of the device, along with its emission compliance information.

Power & Run Time

The Firman T04073 in use

The Firman T04073

The Firman T04073 delivers 120/240V and benefits from a tri-fuel technology that allows it to run on gasoline, propane, or natural gas. When gasoline-powered, it enjoys a running wattage of 4,000W and a peak wattage of 5,000W. When propane-powered, it benefits from 3,600 rated watts and 4,500 peak watts. Its natural gas operation offers 3,200W of rated wattage and 4,000W of starting wattage.

The generator features a simple traditional pull-start mechanism and also a simple and elegant electric starter (battery included). It is rated for a noise of 67 dBA (less noisy than an office).

The running time of the T04073, with its 5 gallons fuel capacity, can reach around 14 hours at 50% load on a full tank of gasoline (fuel consumption around 0.36 GPH). With propane, it can reach around 9 hours (on a 20 lbs tank - propane consumption around 0.52 GPH).

The quite high THD (<14%) of the T04073 makes it unsuitable for powering sensitive electronic devices.

Outlets

The control panel includes the following 4 AC outlets:

Duplex 120V 20A (5-20R) GFCI
120V 30A (L5-30R) receptacle
120/240V 30A (L14-30R) receptacle

While this Firman generator is not RV Ready, its L5-30R receptacle can be used for a simple RV connection with an L5-30P to TT-30R adaptor (included). Besides, since the T04073 bears a twist-lock L14-30R receptacle, it is transfer switch ready: it is easily connectible to a breaker box and can power your home in case of a power outage.

Portability

The dimensions of the Firman T04073, which are L29.8 x W27.5 x H26.1 in, and its typical, open frame design provides stability and enables the generator to be raised above ground level. The device has been designed for tough environments and demanding outdoor use.

While the generator is considered to be technically 'portable' (in the sense that you can move it), manually lifting and transporting it may be challenging, due to its high weight of 123.4 lbs. Still, once it is on the ground, its wheel kit (⌀8") and its folding handle can easily solve the issue of low mobility and allow for easy relocation of the device.

Features

Panel of the Firman T04073

The T04073's control panel

The control panel of the T04073 includes a convenient meter, which displays voltage, frequency and lifetime hours, helpful for the monitoring of its status and activity.

In addition to this info, the device’s light indicator will display if the generator is ready.

The fuel level of the generator can be determined quickly, easily, and conveniently with the help of its built-in fuel gauge.

As for its security measures, the device features an overload protection (circuit breaker) and an automatic low oil shut-off, letting you use it with a peace of mind.

The T04073 also benefits from Firman’s CO Alert carbon monoxide shutdown, which automatically shuts down the engine when harmful levels of carbon monoxide accumulate around the generator or a CO Alert fault occurs.

While the standard documentation and an owner's manual (opens in a new tab), helpful for starting the device promptly, come with the Firman T04073, the following accessories are also included: oil, funnel, cover, RV adapter, propane hose and tool kit.

Emissions

The Firman T04073 is EPA-approved and CARB-compliant. It can therefore be sold and purchased in all 50 states, including California.

Moreover, it features a spark arrestor and thus, may be used in forested areas.

The unit also meets the ANSI/PGMA G300-2018 safety and performance requirements.

Product Video

The Firman T04073 versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Firman T04073 compare to generators of similar power (between 3500 and 4500 W).

  • Since the generator weighs in at a dry weight of 123.4 lbs, the Firman T04073 belongs in the expected weight range for devices which can produce between 3500 and 4500 rated watts. Regarding dry weight, one of the champions in the same power range is the WEN GN400i, with a dry weight of only 66.1 lbs.
  • Since the generator's noise is rated at 67 dBA, it has the roughly average expected noise for a device of similar power. If you’d prefer a less noisy device, one of the most quiet devices, which share the same power range with this one, is the Westinghouse iGen4500DF, whose lowest noise levels reach just 52 dBA.
  • With a run time of around 14 hours at 50% load, the T04073 has one of the higher run times, compared to its similarly powerful peers. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the Predator 4375, which is able to run for around 16 hours.
  • While the run time is an important parameter, it is dependent on the fuel tank’s capacity and thus, doesn’t say much on its own unless we consider fuel consumption as well. This generator reaches an estimated fuel consumption of 0.36 GPH (gallon per hour) at a 50% load, making it average, for the previously mentioned wattage range. If you wish to further improve in the area of fuel efficiency, the Westinghouse iGen4500DF, which boasts with a gas consumption of only 0.23 GPH, may be the right generator for you.

Price comparison

As you can see from this interactive chart, when compared to other 3500-4500W generators, the Firman T04073 is on the average side of the price range.

Therefore, this generator nicely fits in the expected budget for this kind of product.

The bottom line

STRENGTHS:
  • In the expected price range
  • CO Alert technology
  • Several accessories included
  • GFCI Outlets
  • RV adapter included
  • Electric start
  • Tri-fuel
  • High run time
AVERAGE SPECS:
  • Decent weight (123.4 lbs)
  • Acceptable noise (67 dBA)
  • Decent fuel efficiency
WEAKNESSES:
  • No remote start

Do you own the Firman T04073 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterNo
Parallel capableNo
RV readyNo
FuelTri-Fuel (gasoline/propane/natural gas)
Engine223 cc OHV 4-stroke
Starting systemRecoil, Electric
Warranty3 years
VoltageAC: 120/240V 60 Hz
Power
GasolineLPGNG
Running watts4,000 W3,600 W3,200 W
Starting watts5,000 W4,500 W4,000 W
Running amps (@120/240V)33.3/16.7 amps30/15 amps26.7/13.3 amps
Peak amps (@120/240V)41.7/20.8 amps37.5/18.8 amps33.3/16.7 amps
Run time @50% load14 h9 hN/A
Run time @25% loadUnknownUnknownN/A
Features
GFCI outletsYes
Covered outletsYes
Automatic Voltage RegulationYes
AC outlets
  • 1x 120V 30A (L5-30R)
  • 1x 120/240V 30A (L14-30R)
DC outletsNo
Data centerVFT
IndicatorsOutput ready
Fuel tankSteel, 5 gal
Fuel gaugeYes
Misc
Weight123.4 lbs
Approx. dimensions (L x W x H)29.8 x 27.5 x 26.1 in
Noise (lower limit)67 dBA
THD< 14%
ComplianceCARB, EPA, ANSI/PGMA G300-2018
SecurityLow oil and overload protection, CO monitoring
Spark arrestorYes
NeutralBonded to frame
Accessories includedOil, funnel, tool kit, propane hose, RV adapter, cover, battery, and wheel kit
Country of originChina
SeriesTribrid
UPC840876140734

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

Spec Improvement×

This form does not send us any personal data (not even your IP address)

About FIRMAN Power Equipment

Founded in 1999, Firman Power Equipment is a company with a short, but established history in the power equipment industry. Based in Arizona, the company offers an immense range of products, including power tools, automotive equipment, storage utilities, work wear, but most importantly, a wide selection of generators of all sizes, designs and outputs. Interestingly, Firman is a wholly owned subsidiary of the China National Machinery Industry Corporation - a somewhat well renowned company in China and acts as a de facto distributor of their products in the US.

Warranty Information

The Firman T04073 is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Firman generators, please consult Firman's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-844-FIRMAN1 (844-347-6261).

Questions & Answers

What can it power?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our generator size calculator.
ItemRunning WattsStarting Watts
At homeSump pump (1/2 hp)10502150
Furnace fan (1/2 hp)8752350
Refrigerator (energy star)1921192
Vacuum cleaner10751175
Total3192 W4667 W
For campingRadiant heater13001300
RV refrigerator180600
Electric grill16501650
Set of 5 LED light bulbs5555
Total3185 W3605 W
For workTable saw18004500
Drain cleaner250250
Bug zapper8080
Total2130 W4830 W

Couldn't find the right answer for you? Ask your own question.

Ask a question

Your name and email address will not be publicly published. We only need them to be able to answer you directly

We would love to know your opinion

Leave a review

Your total score

Generator Bible
Logo
Compare items
  • Total (0)
Compare

You can compare as many generators as you wish. However, for the best results, we recommend you to compare only 2 generators at a time.

0