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Honda EM4000S Spec Review

Picture 1 of the Honda EM4000S
Picture 2 of the Honda EM4000S

The Honda EM4000S is an open frame portable generator with a rated wattage of 3500 W and a starting wattage of 4000 W.

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Description

Zoom on the Honda EM4000S

In a nutshell, the Honda EM4000S is a portable generator mostly geared towards:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • Handcrafting enthusiasts who wish to work on-the-go
  • Homeowners who want to be able to use the most necessary devices in their household, even during a blackout
  • Professionals who want to be able to deliver results, even during a power failure

The following sections will present you in detail its power characteristics, the different outlets it offers, its overall portability, the extra features it benefits from and any relevant emission compliance details.

Power & Run Time

The Honda EM4000S houses a 270 cc Honda iGX270 OHV 4-stroke engine, which provides 120/240V, consumes gasoline and delivers a running wattage of 3500W along with a peak wattage of 4000W.

Enjoying a noise rating of 61 dBA (just slightly more noisy than background music), this generator can be started thanks to a conventional pull-start mechanism, but also to a simple and elegant electric starter (battery included). To add further convenience, the EM4000S can be remotely started (separate purchase).

The fuel capacity of 6.2 gallons allows the EM4000S to operate for around 16 hours at 50% load with a full tank (fuel consumption around 0.39 GPH).

Outlets

The control panel includes the following 6 AC outlets:

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

In addition, it provides 1 DC outlet: there's a 12V 8A output with which charging your batteries is made easy.

While this Honda 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.

Portability

The Honda EM4000S has the following dimensions: L41.1 x W27.8 x H28.3 in. In combination with its conventional, open frame design, they provide support and allow the generator to be raised above ground level. The design is ideal for rough environments and demanding outdoor use.

Since the generator weighs 204 lbs, it will be incredibly difficult to manually lift it and transport it, even though it is technically considered to 'be portable' (in the sense that it is movable). However, this lack of maneuverability is compensated by a wheel kit and a folding handle, with which you can conveniently displace it, once it's on the ground.

Features

Panel of the Honda EM4000S

The EM4000S's control panel

Thanks to a built-in fuel gauge, the generator allows you to quickly, conveniently and easily check the gas level at a glance.

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

As for its accessories, apart from the previously mentioned features, the Honda EM4000S also comes with the basic documentation and a user manual, allowing you to start it right away.

Emissions

The Honda EM4000S is EPA-approved and CARB-compliant. Therefore, its sale and purchase are permitted in all of the 50 states, including California.

Moreover, it features a spark arrestor, which makes it suitable for use in forested areas.

Product Videos

Video of the Honda EM4000S

Video of the Honda EM4000S

The Honda EM4000S versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Honda EM4000S compare to generators of similar power (between 3000 and 4000 W).

  • A weight of 204 lbs makes the Honda EM4000S one of the heavier devices in the 3000-4000 rated wattage range. If weight is your top priority, one of the champions in this power category is the WEN GN400i, weighing just 66.1 pounds.
  • Since this generator is rated for a lowest possible noise of 61 dBA, it can be considered as one of the more quiet of the products generating similar power. If noise emissions are important to you, one of the least noisy generators of this power range is the Westinghouse iGen4500 with only 52 dBA.
  • Since the EM4000S boasts with a run time of around 16 hours at 50% load, it can be safely judged as a device of a higher run time than most generators of a comparable output.
  • The run time is important, but also hugely depends on the capacity of the fuel tank and doesn't mean much if we don't talk about fuel consumption as well. This generator is not fuel efficient compared to devices of similar output: its estimated fuel consumption stands at 0.39 GPH at a 50% load. If you are concerned with gasoline efficiency, having a fuel consumption of just 0.17 GPH, the Westinghouse iGen4200 is a device you should look out for.

Price comparison

As you can see from this dynamic chart, when compared to other 3000-4000W generators, the Honda EM4000S is on the expensive side of the price range.

While certainly not the cheapest of its kind, purchasing it would most likely also mean enjoying the reliability of a high-end product.

The bottom line

STRENGTHS:
  • Remote start capable
  • Quiet for its power (61 dBA)
  • High run time
WEAKNESSES:
  • On the expensive side
  • No data center
  • On the heavy side (204 lbs)
  • Low fuel efficiency

Do you own the Honda EM4000S and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General

InverterNo
PortableYes
Parallel capableNo
RV readyNo
FuelGasoline
Engine270 cc Honda iGX270 OHV 4-stroke
Starting systemRecoil, Electric, Remote

Power

VoltageAC: 120/240V 60 Hz, DC: 12V
Running watts3500 W
Starting watts4000 W
Running amps (@120/240V)29.2/14.6 amps
Peaks amps (@120/240V)33.3/16.7 amps
Run time @50% load16 h
Run time @25% loadN/A

Features

GFCI outletsYes
Covered outletsNo
Automatic Voltage RegulationYes
AC outlets2x Duplex 120V 20A (5-20R) GFCI
1x 120V 30A (L5-30R)
1x 120/240V 20A (L14-20R)
DC outlets1x 12V 8A output
Data centerNo
IndicatorsNo
Fuel tank6.2 gal
Fuel gaugeYes

Misc

Weight204 lbs
Dimensions (L x W x H)41.1 x 27.8 x 28.3 in
Noise (lower limit)61 dBA
THDN/A
EmissionsCARB, EPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralFloating
Accessories includedNo
Warranty3 years

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.

About Honda

Founded in 1948, the Japanese Honda Motor Company has gained notoriety for consistently producing top quality engines, motor-powered vehicles and devices. Over the years, the company has gained a strong reputation in the motorcycle, automobile, but also power tool industry. Honda’s power tool division has been producing power tools since 1953, including tillers, mowers, blowers, sprayers and of course, power generators. While the company has expanded globally and moved a majority of its production out of Japan into other Asian countries, Honda is to this day known as a legend among the generator manufacturers.

Warranty Information

The Honda EM4000S 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 Honda generators, please consult Honda's warranty policies. Alternatively, you can also contact their Customer Support: 1-770-497-6400.

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