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Sportsman GEN4000iOF Spec Review

The Sportsman GEN4000iOF is a compact open frame portable inverter generator with a rated wattage of 3500 W and a starting wattage of 3850 W.

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Sportsman GEN4000iOFSportsman GEN4000iOFSportsman GEN4000iOF
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Description

Zoom on the Sportsman GEN4000iOF

In a nutshell, the Sportsman GEN4000iOF is a compact portable inverter generator mostly geared towards:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • Occasional participants of outdoor events, competitions, concerts and festivals
  • Handcrafting enthusiasts who wish to work on-the-go
  • Homeowners who want to be sure of their ability to power their fridges, cooking tools, heating and lighting equipment during power failures
  • Camping and tailgating buffs looking to enhance their experience

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 Sportsman GEN4000iOF in use

The Sportsman GEN4000iOF

The Sportsman GEN4000iOF houses a 223 cc (6.5 hp) OHV 4-stroke engine, which provides 120V, consumes gasoline and delivers a running wattage of 3500W along with a peak wattage of 3850W. Additionally, as the generator is parallel capable (parallel kit not included), it can be linked to a second unit for more power.

Enjoying a noise rating of 65 dBA (just slightly more noisy than background music), this inverter generator gets running thanks to a simple traditional pull-start mechanism.

The GEN4000iOF can operate for around 10 hours at 50% load with a full tank (fuel consumption around 0.45 GPH), due to its fuel capacity of 4.5 gallons.

Delicate electronics can be plugged in an AC outlets safely, as the GEN4000iOF generates a clean sine wave, reaching a <5% Total Harmonic Disruption (THD).

Outlets

The control panel features the upcoming 3 AC outlets:

Duplex 120V 20A (5-20R)
120V 30A (TT-30R) receptacle

It also sports 2 DC outlets: there's two 5V USB ports with which you may charge electronics, for example mobile phones or tablets, conveniently.

This Sportsman generator is RV Ready, thanks to its TT-30R receptacle (TT stands for 'Travel Trailer').

Portability

The Sportsman GEN4000iOF has a conventional, open frame design, of the following dimensions: L23 x W17.5 x H20.3 in, which offers support and allows it to be raised above ground level. This type of design is ideal for tough environments and heavy outdoor use.

The GEN4000iOF can be taken anywhere with you, thanks to its weight of 93 lbs. Additionally, the generator’s mobility is also improved by its open frame design, as it can be easily grabbed and shifted.

Features

Panel of the Sportsman GEN4000iOF

The GEN4000iOF's control panel

Several light indicators serve to show you when its oil levels are insufficient, the generator is overloaded and the generator is ready.

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

Security-wise, this product benefits from an automatic low oil shut-off and an overload protection (circuit breaker), which gives you a complete peace of mind when using it.

Besides the usual set of documentation and owner's manual (opens in a new tab) to get you promptly started, Sportsman also included a tool kit in the GEN4000iOF's packaging.

Emissions

The Sportsman GEN4000iOF is EPA approved, but NOT CARB-compliant. Thus, it cannot be purchased or sold in California.

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

Product Video

The Sportsman GEN4000iOF versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Sportsman GEN4000iOF compare to generators of similar power (between 3000 and 4000 W).

  • Regarding its weight, the Sportsman GEN4000iOF only weighs in at 93 pounds, which means it's one of the lighter generators in the 3000-4000 rated wattage range. If weight matters to you, one of the champions in this power range is the WEN GN400i with only 66.1 pounds.
  • This inverter generator has a somewhat average expected noise for its power range, rated at 65 dBA. If you are concerned with noise, check out the Cat INV4000E, which is one of the least noisy generators in its power range, with a noise rating of just 51 dBA.
  • Autonomy-wise, with around 10 hours on a full tank at a 50% load, the GEN4000iOF is on the low end when compared to other generators of a similar power output. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the Honda EB4000X, which is able to run for around 16 hours.
  • 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 inverter generator is rather wasteful, compared to other devices within the aforementioned output range, when it comes to gasoline consumption, as it reaches roughly 0.45 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 interactive chart, when compared to other 3000-4000W generators, the Sportsman GEN4000iOF 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
  • RV Ready
  • Parallel capable
  • Inverter
  • Lightweight for its kind (93 lbs)
AVERAGE SPECS:
  • Acceptable noise (65 dBA)
WEAKNESSES:
  • No data center
  • No electric start
  • Not CARB-compliant
  • Relatively low run time
  • Low fuel efficiency

Do you own the Sportsman GEN4000iOF and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterYes
PortableYes
Parallel capableYes, cable not included
RV readyYes
FuelGasoline
Engine223 cc OHV 4-stroke
Starting systemRecoil
Power
VoltageAC: 120V 60 Hz, DC: 5V
Running watts3500 W
Starting watts3850 W
Running amps29.2 amps
Peaks amps32.1 amps
Run time @50% load10 h
Run time @25% loadUnknown
Features
GFCI outletsNo
Covered outletsNo
Automatic Voltage RegulationInverter
AC outlets
  • 1x Duplex 120V 20A (5-20R)
  • 1x 120V 30A (TT-30R)
DC outlets2x 5V USB port
Data centerNo
IndicatorsLow oil, overload and output ready
Fuel tank4.5 gal
Fuel gaugeYes
Misc
Weight93 lbs
Approx. dimensions (L x W x H)23 x 17.5 x 20.3 in
Noise (lower limit)65 dBA
THD< 5%
EmissionsEPA
SecurityLow oil and overload protection
Spark arrestorYes
Accessories includedTool kit
Warranty1 year

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.

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About Sportsman Series

Sportsman Series is a small brand registered under the US based Buffalo corporation. Founded in 1964, the Buffalo Corporation is a small company, which sells tools and home products. Their brands include AmeriHome, Black Bull, Buffallo Tools and Sportsman Series – which offers a selection of generators and several other general products. The brand, and in fact, the corporation itself seemingly outsources all of its production overseas and acts only as a distributor, under its own brands.

Warranty Information

The Sportsman GEN4000iOF is covered under a warranty for up to 1 year. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Sportsman generators, please contact the Sportsman Customer Support: 1-636-532-9888.

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 homeRefrigerator (energy star)1921192
Hair dryer18001900
Toaster oven800800
Total2792 W3792 W
For campingRadiant heater13001300
RV refrigerator180600
RV AC (11,000 BTU)10101600
Slow cooker270270
Cell phone charger2020
Total2780 W3370 W
For workGrinder14002500
Demolition hammer12601260
Bug zapper8080
Total2740 W3840 W

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