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Predator 4375 Spec Review

The Predator 4375 (63960) is a compact open frame generator with a rated wattage of 3500 W and a starting wattage of 4375 W.

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Predator 4375Predator 4375Predator 4375Predator 4375
Note: Predator Generators purchased at Harbor Freight do not include the wheel kit, which is a separate purchase. Other sellers may include it.
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Set an alert for the Predator 4375 - Current lowest price: $429.99
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$429.99
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$799.00
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Price History
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Price history for the Predator 4375
Latest updates:
  • $429.99 - January 31, 2021
  • $349.99 - January 22, 2021
  • $399.99 - January 19, 2021
Data source: harborfreight.com
Since: January 19, 2021
  • Highest Price: $429.99 - January 31, 2021
  • Lowest Price: $349.99 - January 22, 2021

Description

Our new Predator® line has been updated with your convenience and safety in mind. Powered by a reliable Predator® gas engine, this generator is ideal for emergencies, job-sites, food trucks, and outdoor recreation. GFCI outlets, larger fuel tank, longer run time make this generator an unbeatable value. 4375 starting watts and 3500 running watts make this unit capable of powering several home essentials during an outage or providing power on the go. Our new, larger gas tank means you can enjoy run times up to 16 hours @ 50% load.

Zoom on the Predator 4375

In summary, the Predator 4375 is a compact portable generator especially useful for:

  • RV travellers who wish to upgrade their experience to another level
  • People occasionally participating in sporting competitions, open-air performances and outdoor festivals
  • DIYers who wish to improve their efficiency with tools
  • Homeowners who want to be sure of their ability to power their fridges, cooking tools, heating and lighting equipment during power failures
  • Professionals in need of safely powering high-intensity work or lighting equipment

In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed, including its emission compliance information.

Power & Run Time

The Predator 4375 is powered by a 212 cc (6.5 hp) OHV 4-stroke engine. It delivers 120/240V, runs on gasoline and offers a running wattage of 3500W as well as a peak wattage of 4375W.

With a noise rating of 72 dBA (just slightly more noisy than a vacuum cleaner), the generator features a simple traditional pull-start mechanism.

Thanks to a fuel capacity of 4 gallons, the 4375 can operate for around 16 hours at 50% load with a full tank (fuel consumption around 0.25 GPH).

Outlets

The control panel features the following 5 AC outlets:

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

Additionally, it features 1 DC outlet: there's a 12V 8A (cigarette lighter style) receptacle allowing you to easily charge your batteries.

As it features a twist-lock L14-30R receptacle, the 4375 is transfer switch ready: in case of a power outage, you will be easily able to connect it to a breaker box and power your household.

Portability

The dimensions of the Predator 4375, which are L23.3 x W18.7 x H19.3 in, and its typical, open frame design provides stability and enables the generator to be raised above ground level. The featured design is ideal for the outdoors and all tough environments.

As the generator's weight is 103.5 pounds, manually moving it or transporting it may be challenging, despite the fact that it is technically considered 'portable' (movable). However, its challenging mobility is solved by a wheel kit (separate purchase), which will ease its displacement, once it is on the floor.

Features

Panel of the Predator 4375

The 4375's control panel

A light indicator serves to show you when its oil levels are insufficient.

The generator allows for a quick, easy and convenient assessment of its gas level, as it is equipped with a built-in fuel gauge.

From a security point of view, the generator is equipped with an automatic low oil shut-off and an overload protection (circuit breaker), giving you a peace of mind during use.

Regarding its accessories, besides the aforementioned features, the Predator 4375's box includes the typical documentation and an owner's manual (opens in a new tab), letting you start it right off the bat.

Emissions

The Predator 4375 is EPA-approved and CARB-compliant. Thus, selling and purchasing this generator is allowed in each of the 50 states, including California.

Moreover, it features a spark arrestor, so it is adequate for use in forested areas.

Product Videos

The Predator 4375 versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Predator 4375 compare to generators of similar power (between 3000 and 4000 W).

  • As its weight is 103.5 pounds, the Predator 4375 falls in the expected weight range of the devices in the 3000-4000 rated wattage category. In terms of weight, one of the champions in their power range is the WEN GN400i, standing at just 66.1 lbs.
  • As this generator has its lowest possible noise of 72 dBA, it should be considered noisier compared to its peers of a comparable running wattage. For those who are looking for a less noisy device, we suggest the Cat INV4000E. With just 51 dBA, it is one of the most quiet devices in this power range.
  • With a run time of around 16 hours at 50% load, the 4375 has one of the highest run times, compared to its similarly powerful peers.
  • 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, with an estimated fuel consumption of just 0.25 GPH (gallon per hour) at 50% load, is one of the more fuel efficient generators, for the previously mentioned wattage range. If you wish to acquire one of the most gasoline efficient products of this power range, the Westinghouse iGen4200, with a fuel consumption of 0.17 GPH could be in your good books.

Here's a list of the most popular specific comparisons:

Price comparison

As you can see from this interactive chart, when compared to other 3000-4000W generators, the Predator 4375 is on the cheap side of the price range.

It can therefore be a really good buy if you're looking to acquire a budget generator.

The bottom line

STRENGTHS:
  • Inexpensive
  • GFCI Outlets
  • High run time
  • Fuel efficient
AVERAGE SPECS:
  • Decent weight (103.5 lbs)
WEAKNESSES:
  • No data center
  • No electric start
  • Wheel kit not included
  • Weak warranty
  • On the noisy side (72 dBA)

Do you own the Predator 4375 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
Engine212 cc OHV 4-stroke
Starting systemRecoil
Power
VoltageAC: 120/240V 60 Hz, DC: 12V
Running watts3500 W
Starting watts4375 W
Running amps (@120/240V)29.2/14.6 amps
Peaks amps (@120/240V)36.5/18.2 amps
Run time @50% load16 h
Run time @25% loadUnknown
Features
GFCI outletsYes
Covered outletsNo
Automatic Voltage RegulationYes
AC outlets
  • 2x Duplex 120V 20A (5-20R) GFCI
  • 1x 120/240V 30A (L14-30R)
DC outlets1x 12V 8A (cigarette lighter style)
Data centerNo
IndicatorsLow oil
Fuel tank4 gal
Fuel gaugeYes
Misc
Weight103.5 lbs
Approx. dimensions (L x W x H)23.3 x 18.7 x 19.3 in
Noise (lower limit)72 dBA
THDUnknown
EmissionsCARB, EPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralBonded to frame
Accessories includedNo
Warranty90 days

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 Predator

Predator portable generators are solely distributed by the Harbor Freight Corporation, which has an impressive list of over 200 trademarked products. The Predator brand is one of their newer lines of outdoor power products. As with many other makes and models of power equipment sold by Harbor Freight, Predator generators are manufactured in China.

Warranty Information

The Predator 4375 is covered under a warranty for up to 90 days. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Predator generators, please consult Predator's warranty policies stated in the user manual (opens in a new tab). Alternatively, you can also contact their Customer Support : 1-800-444-3353.

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 sizing calculator.
ItemRunning WattsStarting Watts
At homeElectric fry pan15001500
Sump pump (1/2 hp)10502150
Refrigerator (energy star)1921192
Set of 5 LED light bulbs5555
Total2797 W3897 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Electric fry pan15001500
Radio100100
Total2790 W3380 W
For workGrinder14002500
Demolition hammer12601260
Bug zapper8080
Total2740 W3840 W
Is there a drain plug for gas on the generator for long term storage? (Asked April 29, 2020)

It doesn't seem that there are any. I'd suggest to contact Harbor Freight to make sure.

Does this generator have an inverter? (Asked June 10, 2020)

This unit is not an inverter generator.

how do i change the oil (Asked August 21, 2020)

Oil change procedure is detailed page 17 of the owner's manual (opens in a new tab).

What spark should I use and what is the gap setting (Asked August 23, 2020)

Spark plug type is NHSP/Torch F6TC. Gap setting is 0.027" – 0.031".

What kind of oil (Asked August 28, 2020)

Recommended engine oil is SAE 10W – 30 above 32° F, and SAE 5W – 30 at 32° F or below

What grade of gas? (Asked September 08, 2020)

Recommended gas is 87 octane or higher unleaded gasoline that has been treated with a fuel stabilizer additive.

Do you have to ground this generator predator 4375 (Asked September 08, 2020)

It is always safer to ground your generator.

Can I connect my RV 30 amp cord into the 120/240V 30A (L14-30R) receptacle? The panel says 15A max??? (Asked October 10, 2020)

You absolutely can. You just won't pull more than 15A amps out of it.

Can the 4375 be connected directly to the my homes' main panel box? (Asked October 17, 2020)

It can be connected to a transfer switch. Note that this connection should be made by a licensed electrician.

How much oil does the Predator 4375 hold? I cannot find that info anywhere. (Asked November 01, 2020)

Engine oil capacity is 0.6 quarts.

Does this model have carbon monoxide that automatically shuts off if level gets too high? If machine is placed 30ft from home with "exhaust" pointed away from home safe enough?can strong wind blow CO back to home at a dangerous level? As home health nurse,I had 2 patients,separate cases I had send to morgue,so I know danger! (Asked December 27, 2020)

This unit does not have a CO monitoring feature. You may check this list of generators, which have a similar wattage output and benefit from a CO sensor. We recommend also reading our safety guide.

Can the generator be ran in snowy conditions (Asked February 15, 2021)

Please refer to our article on operating a generator in bad weather.

My question concerns the 240 volt outlet total amperage output. It lists here at (1x 120/240V 30A (L14-30R). So I take this to mean 30 amps even though the label painted on the side says 15 amps maximum. 30 amps would make sense as its combining both of the 15 amp 120 volt circuits. The 4375, the 6500, and the Predator 9000 all list identical outputs in the descriptions but on the unit they differ. So just trying to confirm total amp output as I plan on hooking up to the house panel. (Asked February 17, 2021)

It means that the outlet is 30 amps, as per its NEMA nomenclature (L14-30R). For the Predator 4375, this outlet won't output more than 15 amp. 15A x 240V = 3600W.

What are the valve gaps set at (Asked March 09, 2021)

Intake 0.004" – 0.006", Exhaust 0.006" – 0.008"

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

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Predator 4375
7.4 Total Score
4 reviews
Add your review
Price
7.8
Value
7.8
Quality
7.5
Performance
6.3
4 Reviews
Show all Most Helpful Highest Rating Lowest Rating Add your review
  1. 3.15
    Price
    50
    Value
    50
    Quality
    70
    Performance
    80

    Love this product, always wanted to own. Generator and this one was perfect for the price and accessibility.

    + PROS:
    • compact, with wheel cart easily movable, price was good.
    - CONS:
    • loud (being a generator and all), have to buy the other accessories including a grounding wire.
    Helpful(4) Unhelpful(3)You have already voted this
  2. 4.5
    Price
    100
    Value
    100
    Quality
    90
    Performance
    70

    I bought the generator wheel kit. I watched a video about the generator. In the video, the man said he’d originally put the wheel mounts on backwards. I looked at the instructions. I tried to determine how to attach the wheel mounts. The kit didn’t come with the correct washers. I couldn’t attach the mounts with the provided washers. I wanted to put washers on both sides of the wheels. That’s what the directions show. I have lots of spare nuts, washers, etc. Unfortunately, didn’t have what was necessary. I had to make a run to the hardware store.
    I agree that the oil fill is in a poor location. The generator seems well built. Hopefully, I’ll get many years of use out of it.

    + PROS:
    • Will power a reasonable load.
    - CONS:
    • Doesn't come with a wheel package included. Oil fill is rather inconvenient. Could be a little quieter.
    Helpful(6) Unhelpful(1)You have already voted this
  3. 4.15
    Price
    90
    Value
    90
    Quality
    70
    Performance
    80

    Bought the generator as a backup power source for our home. Had to buy a wheel kit, but it was easy to install. Wished it had a data center, but I bought one via AMAZON. Hooked the generator to the house panel after having the panel fitted for it. The generator works perfectly in powering everything except the central air, it would power the central heat though. Overall…very happy with the purchase!

    + PROS:
    • Powers tho home via electrical panel
    • Value
    • Easy setup
    • Easy start
    • Portability
    - CONS:
    • Loud, even for a generator
    • No data center
    • No outlet covers
    • No wheel kit
    Helpful(1) Unhelpful(0)You have already voted this
  4. 2.9
    Price
    70
    Value
    70
    Quality
    70
    Performance
    20

    Gfi outlets trip continuously while running only 7 amps!! Cannot replace existing 110 ac gfi outlets on the control panel. I have an 1800 Ironton generator that will run the same 7 amp equipment all day long!! I would not recommend purchasing a predator 4375 Generator!!

    + PROS:
    • Starts easily, quite,runs great
    - CONS:
    • Gfi trips
    Helpful(2) Unhelpful(0)You have already voted this

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