Predator Generator 4375 Buyer’s Guide (Unbiased Review)

Last Updated on April 25, 2023 by Rod Olivares

Introducing the powerhouse you never knew you needed – the Predator 4375 Generator! This bad boy will keep your lights on during a power outage, power up your tailgate party, your camper, and maybe even make your neighbors envious. Want to know why this generator is a must-have for all your power needs? Here’s our unbiased Predator 4375 review.

Predator 4375 generator review

The Predator 4375 gas-powered OHV engine generator is a combination of many 2023 user-favorite qualities. Use the information in this guide to find out if the 2023 Predator line of generators, and more specifically the new Predator 4375, has the right qualities and the right price for your needs.

A young man buying waffles at a food truck that is powered by a Predator 4375 generator

Features and Functions of the Predator 4375 Generator!

There are clear links between cutting-edge features and impressive performance in 2023 generators. These links mean that generators with features like low oil shutdown and vibration-dampening will deliver better performance than others. Learn more about the Predator generator’s features and functions below.


  • Brands: Harbor Freight
  • Dimensions: 19 1/4 x 23 1/3 x 18 2/3 inches
  • Weight: 103.50 pounds
  • Start type: Recoil
  • Certification: CARB and EPA-III
  • Max Starting watts: 4375
  • Running watts: 3500

Design and Construction

From top to bottom, front to back, the Predator line of generators uses cutting-edge design to reduce noise and increase the horsepower available. As a gas engine, the price of the unit is justified by new and extra features added as recently as 2023.

The Engine

The gas engine of the Predator generator is a well-crafted, powerhouse machine. It delivers 6 5 hp which means a greater breadth of products that may be powered by it.

With features like low oil indicator and shutdown, the engine is built for longevity. It has an impressive, competitive run time of 16 hours at 50% load. This is a larger capacity than other new generators that have come out prior to this year.

The engine is a 212cc 6.5 hp air-cooled OHV gasoline engine. Users may easily and quickly start the gas engine via a pull-start mechanism.

  • Fuel Type: 87+ Octane Unleaded Gasoline
  • Fuel Tank Capacity: 4 Gallons

The fuel tank on the predator portable unit is a whopping 4 gallons. This in part allows for that impressive run time of 16 hours with a 50% load.

The Body

The body of the Predator 4375 generator is heavy-duty, durable, and sturdy. It is red and black for a sleek and professional appearance, with a heavy-duty 1-inch steel roll cage that protects from every side. This monster of a unit is built for horsepower, not for small size, which means users may find that it is not compact enough if their storage is limited. The generator is durable and stands up to weather and wear and tear, making it the ideal choice for outdoor events or food trucks.


To help with the massive size, a wheel kit is available for quick transport. It’s not a free item included with the purchase of the Predator unit, but the price is an easy add-on for increased convenience.

The wheel kit includes two wheels and a pull handle and attaches easily to the steel frame. Each wheel is durable and meant to bear the weight of the machine and pull easily across uneven terrain. Pulling the generator gives you a significant advantage over having to haul more than one hundred pound items by hand. It makes transportation quick and easy.


This gas engine meets many emissions standards. It is CARB-compliant, EPA-approved, and more. This allows for it to be accessible in every state.

RV and camping lovers will enjoy that it includes a spark arrestor. This means that even in wooded areas you may whip out your Predator generator for access to fast power.


close up of a black computer outlet both ends that can be hooked up to a Predator 4375 power generator

This Predator-line generator has several outlets included so that users can get their devices charged on work sites, outside events, and more without having to buy converters. This is especially effective if you are using it as a backup generator in case of emergency. As far as outlets go, the Predator 4375 includes six total plugs with three unique types. These include:

  • 120v GFCI 3-prong outlets (4)
  • 120/240v twist lock 4-prong outlet
  • 12v dc outlet

The varying types of outlets mean that you can power different types of tools and products at once. So what is the GFCI outlet, what are its benefits, and what does it allow you to power?

GFCI Outlet

The GFCI outlet is a traditional, 3-prong outlet, but it includes one extra distinguishing feature. GFCI stands for ground fault circuit interrupter. It prevents dangers like fire or overheating within the system by registering current imbalances in its sensor and shutting off the flow of power.

Current imbalances that the sensor registers as a reason to shut down may be dangerous if not responded to in this way. This means that Predator 4375 minimizes risks associated with using a gasoline-powered generator like shock injuries or fatal burns. All the outlets come with protective outlet covers to increase safety further.

Low Oil Indicator & Shut Down

The low oil feature means that the machine itself monitors the oil pressure in the OHV gasoline engine. If the pressure does start to get too low, the engine will display this information and then shut down.

Running on low oil pressure can cause even new generators to sustain wear and tear. This results in a shorter lifespan with a more frequent need for repair or replacement. Without this feature, even a generator purchased in 2023 could age significantly more than one with a low oil shutdown. In this way, the low oil indicator and shut down feature saves users money in the long term.

Vibration-Dampening Foot Pads

These additions to the body of the gas-powered Predator 4375 help to make the life of the unit longer. It does this by reducing wear and tear. The pads are made of an elastomer combined with metal. They are a form of shock absorber, preventing the effects of vibration on a generator’s sound or function. Vibration dampening allows items to be more efficient and quiet, and have a longer lifespan.


This item uses a standard two-year warranty. If you buy this item, the company Predator is promising that the new portable generator will be free of malfunctions or defects for the duration of the warranty.

What Will a 4375 Watt Generator Run?

The strong and durable OHV engine can power a wide range of items. This includes power tools, food trucks, RV appliances, refrigerators, electronics like televisions, sump pump, microwave, grinder, and even an electric drying pan! For this reason, this item is a great backup power source for emergencies like power outages related to storms.

  • Max Starting watts: 4375
  • Running watts: 3500

A post-2023 generator with 4375 max starting watt like this has the extra power necessary to handle a load of multiple appliances at the same time for hours.

Pros & Cons of the 4375 Generator

The 6 5 hp Predator line of generators has many positives and a few negatives as well. Check these pros and cons to decide which features are essential and which you don’t mind missing out on.


  • The Predator has a larger fuel tank than other models
  • Users get six different outlets with unique safety and convenience features
  • Low oil shutdown prevents wear and tear for a more long-lasting generator
  • High max starting watts


  • At 103.50 pounds, this Predator portable generator is much more difficult to transport than other options on the market

Frequently Asked Questions

Here are a few commonly asked questions and the information you need about the Predator 4375 generator.

How Loud is a Predator 4357 Generator?

With such a powerful running watts load and max starting watt capability, you’d think that the Predator 4357 generator was on the louder end of generators on the market in 2023 and beyond. In reality, this gas-powered generator uses features like its vibration-dampening foot pads to run quieter than other generators of its size. While its sound rating of 72 decibels is certainly not quiet in 2023 electronics, it is the best you can find in a generator of this size. This line of generators won’t be disruptive in open spaces or work sites but would be less suitable indoors.

Generator Comparison: Key Features and Specifications

Generator Model Noise Level (decibels) Starting Watts Running Watts Engine Type Additional Features
Predator 4375 72 4375 3500 212cc 6.5 HP air-cooled OHV Low oil indicator, circuit breaker, heavy-duty frame
Honda EU2200i 48 – 57 2200 1800 GXR120 Inverter technology, fuel efficient, parallel capable
Westinghouse WGen7500 72-90+ 9500 7500 420cc OHV Remote start, transfer switch ready, long runtime
Champion 75537i (Discontinued) 58 3100 2800 171cc single-cylinder OHV Inverter technology, RV-ready, wireless remote start

Is Predator a Good Generator?

There are hundreds of new back -up generators on the market yearly. Predator generators provide valuable features related to better run time, noise reduction, and efficiency that make it a high-quality, well-crafted product. The run time for the 4375 is perhaps the most impressive of its many competitive specifications, offering 16 hours of run time at a 50% load. Also, both the running watts and max starting watts are above the 3500-watt mark. You can always go for something a bit more powerful such as the Predator 6500 generator. Compared to other generators available, the price of the Predator product is standard for the tools it provides.

Which Oil Does The 4375 Predator Generator Use?

As of 2023 and as recommended by the Society of Automotive Engineers (A.K.A. SAE) the 4375 Predator generator continues to operate on a suggested engine oil 10W-30 (above 32° Fahrenheit) and 5W-30 at 32° Fahrenheit or below. This is the number one recommendation from Harbor Freight’s (manufacturer) specs. For freezing temperatures or alternate uses, don’t forget to use 5W-30.

How much oil does predator 4375 take?

The oil capacity for the Predator 4375 Generator is 0.6 Quart, as outlined in the manufacturer’s specs.

Will a Predator 4375 Generator run a camper?

Oh yeah! You’ll be able to run your camper fine with the Predator 4375 generator. Just don’t overload it by running the AC, the microwave, and other items at the same time. But here, watch this video!

Predator 4375 Generator powering a pop-up Camper

The Verdict: Is Predator 4375 by Harbor Freight Worth It?

While you have to pay for extra features like the wheel kit, the high max starting watt and 16 hours at 50% load make this long-lasting device a great heavy-duty choice for long outdoor events. You can see the links between these capabilities and the 212cc 6.5 hp air-cooled OHV gas engine. This engine is at the core of why the Predator 4375 is one of the best 2023 choices in terms of fuel, starting watt, run time, long lifespan, and more. It has all the best technology available after 2023 with air-cooled OHV construction, low oil shutdown, and 6.5 horsepower.

If you want to get a compact unit that is extra lightweight and easy to transport, this unit is not the best choice for you. Otherwise, though, this air-cooled backup gas-fuel generator is a great option for RVs, work sites, outdoor recreation, food trucks, and more.

RV set up and parked beside trees in a site

Predator 4375






Ease of Use





10.0/10 is an independent review business. I am not affiliated with any manufacturers and do not accept paid reviews. When you buy through my links, I may earn a commission which helps me purchase more generators for testing. - Scott Krager

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