Predator 4000 Generator Buyer’s Guide 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

Last Updated on October 18, 2022 by Manager Access

It can be hard to trust products and know which are best for you. Any participant in the Amazon seller programs could be making money from your qualifying purchases. This review, though, gives you the in-depth data and product specifications that you need to find out if the Predator 4000 is right for you.

In this Predator generator review, we’ll walk you through all the Predator 4000 generator features. Does it have enough power to fulfill what you need? How many watts can it handle? In the reviews below, we’ll help you start your research into the best and most powerful inverter portable generator for your home.

Product Specifications

  • Weight: 128lbs
  • Dimensions: 24 x 19 x 20 inches
  • Material: Metal
  • Power Source: Gas-Powered
  • Run Time: 10 Hours at 50% capacity
  • Heavy-duty 1 in. steel roll cage
  • Low oil indicator / low oil shutdown
  • 212cc, 6.5 HP air-cooled OHV gas engine
  • UL listed circuit breakers
  • (4) 120V duplex outlets, 3 prong; (1) 240V twist-lock outlet, 4 prong (1) 12V DC outlet
  • Recoil start
  • GFCI outlets
  • Watts: 4000 max. starting, 3200 running
  • Generator size: 23 1/3 inches long, 18 2/3 inches wide, 19 1/4 inches tall
  • Product weight: 99 lbs (110.65lbs shipped weight from Harbor Freight)
  • Frame: open, compact
  • Portable: yes

The outlet options for the Predator 4000 are extensive. The variety means you don’t need to worry too much about additional adaptors. The twist-lock outlet is handy, as you can connect your most essential apparatus here.

GFCI outlets are also essential. Operating a generator isn’t something most of us do every day, so the more safety, the better. The UL listed circuit breakers help prevent overloading, so you can easily monitor your watts use.

A low oil indicator easily visible from inside the house is another plus. On this note, the fuel tank of the Predator 4000 generator uses 87-octane unleaded gasoline. You can fill it using one of those 5-gallon standard 87-octane gasoline cans that you can get at the gas station.

At 99lbs, it’s not the lightest generator on the market. On the other hand, it’s hardly overweight. Take note, though: the wheel kit and handle are generally available separately. You’ll undoubtedly want the wheel kit if you plan to take the Predator 4000 generator very far as it will help lighten your load.

Design and Construction

When you get a generator like this, it’s essential to know everything from the running watts to the construction quality. Level up your knowledge of the generator with this breakdown of each element of its construction. Starting with the engine, find out which tools on the generator are up to par.

The Engine

At the core of the powerful Predator 4000 generator is a 212cc 6 5 HP air-cooled OHV gas engine. This 212cc 6 5 HP air-cooled OHV gas engine offers clean and gas-saving performance, with features including:

  • Cast iron construction
  • Intuitive operation
  • Low oil sensor automatic engine shutdown

The engine on this Predator generator is EPA III certified and can run for ten hours and cover up to 4000 watts.

The Body

The fuel tank on this generator is a top-mounted type. It’s the perfect harbor freight tool with features like electric start and upper-tier fuel efficiency. It’s EPA III emissions certified and comes in a sleek red and black design with a front-facing, intuitive controls board.

The predator generators also come in a heavy-duty 1-inch steel roll cage for protection and ease of transport. If users want a marginally better transport experience, they can opt to purchase an additional fitted wheel kit.

The wheels for the caged predator generator enable faster transport. Otherwise, it would likely require two people at a time to carry it. The only issue is that the wheel kit costs extra to purchase and is therefore not included with the product.

five sockets

Outlets and Attachments

As far as outlets go, the Predator generators have the following:

  1. Two 120V, 20A 3 prong duplex outlets
  2. One 240V, 30A 4 prong twist-lock outlet
  3. One 12V DC outlet

Duplex outlets allow for the placement of multiple plugs close together to save space and leave room for more devices. The design means better organization and more powering capabilities for the generator.

A twist-lock outlet is different from a wall outlet. Typically, you’d push to ignite the outlet connection. With a twist-lock outlet, you instead have to twist it to connect and stay plugged. These plug types are often necessary for sources that are powering processes that involve water circulation, such as pools, hot tubs, and more.

A DC outlet is the third type of outlet that the predator generators include. It is the perfect low voltage solution for small devices. With this outlet, you can charge batteries, personal computer devices or phones, and more. All you need to plug it in is a DC connector rather than a pronged plug. You can get an adapter as well.

The diversity of plug attachments on the Predator 4000 generator makes it a desirable choice for home use and a strategic competitor for job site use.

How Long Does It Last?

This generator has a relatively long run time for one of the best portable generators on the market. In the event of a power outage, the generator could be an excellent power source. It ensures practical running watts and length that equates to approximately a shift’s length.

The Predator generator can run for 10 hours when running at 50% capacity, starting with a full tank. It is ideal for job site use.

welding works

Is it Good for Compact Travel?

Unlike other smaller generators with lower run time and running watts, the Predator generator is quite large to carry. Without the right car with lots of space for transport, this generator may not be the best pick for convenience in travel. It isn’t as easy to transport as a portable generator that would fit in a backpack. It takes approximately two people rather than one to move the Predator 4000 from place to place.

However, if you are looking for a portable generator for a static location with occasional movement around the premises, this is a perfect choice. For camping enthusiasts or touring musicians, this Predator generator can be ideal—as long as you can fit it in a truck, RV, or van. It’s not the right size for a backpacking trip unless you plan on hauling all 128lbs of the generator around on your back.

an rv parked on a site with the door open

Predator Generators Features

  • Oil indicator
  • Low oil shutdown

Low Oil Indicator

This inverter generator uses a recommended SAE 10w-30 oil or SAE 5w-30 for colder climates (less than 32 degrees). The machine itself uses the low oil indicator to intuitively sense that it is low on oil and signal to the user to refill.

The signal is a light on the left of the DC outlet. A good rule of thumb is that it will need an oil change after approximately every 20 hours of use. This length of time is impressive, making this generator efficient and a great way to save money on oil at the same time. Features like this make the initial price of the generators even more reasonable.

Low Oil Shutdown

This feature shuts off the generator system when it has reached an unviable oil level. When the oil pressure is low, the switch closes, which grounds the power and shuts off the engine. It prevents damage to your unit that can occur from running on empty too many times.

The low oil shutdown prevents wear and tear and improves the longevity of your generator. That way, you can keep using it without having to pay more for repairs or replacement in later years.

What Can It Power?

The Predator 4000 generator makes up in power what it lacks in compactness. The running wattage of these portable generators is 3,200, and the peak wattage is 4,000.

The wattage means that it has enough power to fuel one 240V appliance OR four 120V appliances at once. It may mean extensive and near limitless use of devices like:

  • Phones
  • Tablets
  • Computers
  • Microwaves
  • Power tools
  • Refrigerators

well-arranged gadgets on a table

It also means being able to power large units like an 1800 watts skill saw. Don’t try to power your entire home, but these generators can handle the big stuff. This kind of coverage is why so many people choose this unit to act in the case of power outages.

There is one ideal way to find out if these Predator generators will have the running watts you need for your home or job use. Add up the wattage requirements for each device. Start with the devices that you know you’ll need and add up the individual watts.

Once you have the number of watts, you’ll know if the Predator 4000 can support your devices by looking at the Predator’s running watts. A little trick if you can’t get the exact amount of running watts for one of your devices is multiplying the amps by the volts.

Predator 4000 Generator Review: Features & Functions

The Predator 4000 has some fairly impressive features, including:

  • 3200 running watts of power
  • 212CC 6. 5 HP air-cooled OHV
  • 10 hours run time at 50% capacity

These features make the Predator 4000 generator great as an emergency power source. A smaller generator with fewer watts output might keep a few essentials running. Still, you want that extra wattage when you don’t know how long you’re going to be in the dark.

A wide range of options for plug-ins comes in handy, too. We can talk about keeping our portable phone chargers fully loaded for convenience. It’s a great precaution. But what if you didn’t, and you need that charge to use your phone in an emergency? Hey, you don’t have to switch off the freezer to do it!

It’s also just the right kind of generator for bringing a couple of home comforts that you can’t usually get on a camping trip. A fridge, speakers, phones—getting out into nature is nice. But a couple of nights in the woods with great music and cold beer is even better!

two people cooking at a camping trip at night

How Much Can You Run on a 4000 Watt Generator?

Many of us look for generators that can make sure our essentials can function during power outages. So what can you run with one of these generators with 4000 watts starting power?

What You Can Run

  • Fridge/freezer
  • Microwave
  • Small AC unit
  • Small heating system
  • TV
  • Computer
  • Sump pump

You should prioritize essentials over recreational items in a power outage. All generators can overload. The 3200 running watts is a lot of starting power, though, and you’re well-covered for the energy load for essentials.

During power outages, having plenty of good portable lights and batteries is also advisable. We don’t recommend trying to get generators to run home light bulbs unless you know what you’re doing!

Portable phone chargers are also a useful addition. It lets you free up the generator for appliances that can’t use batteries, like the freezer. You don’t want to have to waste a pile of defrosted food in an emergency!

What You Can’t Run

Household items that generate a lot of heat require massive wattage. Running an electric clothes dryer, for example, may need more wattage. Electric kitchen appliances like a toaster are also high-consumption.

Even if you can run a smaller item that only briefly generates heat, it may cost you valuable hours of power. Unless you have a lot of fuel on hand, it’s best to prioritize.

Does a 212cc 6.5 HP Air-Cooled OHV Engine Provide Enough Power?

For most purposes, the answer is yes. The Predator 4000 generator has a strong engine that can power most household essentials. It also runs on oil, so you can affordably extend the already impressive 10-hour run time.

The Predator 4000 is a powerful generator that isn’t too heavy. Plus, it is easy to use with a one-pull recoil start. It also comes at a very low price, making it one of the best generators for household use.

How Long Does Predator Generator Run on Gas Tank?

With a full tank of oil, the Predator 4000 offers 10 hrs at half power (2000 watts). As the wattage increases, the running duration decreases.

Ten hours isn’t a class-leading duration for mid-size generators, but it’s respectable. Remember that for most uses, you won’t need to be maxing out the generator. Though if you’re planning an off-grid rave, you might want to go bigger!

If you need more power, you need more fuel. You can get the 87-octane gasoline used to power the Predator 4000 at most gas stations. Make sure you stock up on fuel so you can keep running your portable generator wherever you are.

Harbor Freight Warranty & Extras

The warranty for these generators is 90 days, which is one of its weaker points. Several competing companies offer a warranty of 3 years, which is undoubtedly an advantage. You have to hope that the reputation for reliability doesn’t let you down.

As we noted earlier, the wheel kit comes separately, which isn’t ideal. On the other hand, the open frame means it is easier to transport. Plus, the unit’s cost is very low given the engine power, so this isn’t a huge issue.

Predator Generator 4000 Warranty

This powerful generator comes with a warranty of 90 days. It has an additional emissions control system warranty that lasts two years.

Pros & Cons

With the good and the bad, the Predator 4000 is a powerful generator with innovative features. Use these pros and cons to help you calculate the quality this generator may bring to your business or personal projects.


  • Includes three types of outlets for ease of use
  • Generates power for many different types of devices
  • Can detect and shut down in the case of lower oil
  • Features prevent damage and enhance machine longevity
  • Delivers actionable 10-hour run time
  • Operates fuel-conscious and energy-efficient


  • Limited mobility without the wheel kit, which comes available separately
  • Sensitive electronics may not fare well on these generators without a stabilizing unit

How Does It Hold Up to the Competition?

There are many alternatives to the Predator 4000 generator available on Amazon com or from Amazon services LLC associates. Here are some of the top competitors starting with Honda and how the Predator 4000 measures up against these generators.

Honda EU 22009 2200-Watt 120-Volt Super Quiet Portable Inverter Generator

This unit is much more compact and portable than the Predator generators. It weighs only 40 lbs as opposed to more than 100 lbs. This size makes it the better choice of the two generators for trips or events where moving the unit is essential. Camping is a perfect example.

The Predator 4000, on the other hand, might be better for a job site or even at home. It also can power more devices than portable options. Fortunately, if you require mobility, you can customize the Predator 4000 purchase with the additional wheel kit.

ryobi generator rg-950

Yamaha EF 2000iSv2

If reliability is important to you, Yamaha EF generators are portable, reliable, and stylish. This model is much more modern and compact than the Predator 4000 for tailgates and outdoor parties. However, it can’t handle the same level of power as the Predator though.

For the highest voltage capabilities, get the Predator 4000 through the services LLC associates program as your best choice for the best price.


Are Predator Generators Any Good?

It’s relatively common for people to think of other brands as having better offerings than Harbor Freight. Sure enough, these brands produce some excellent generators. We’ll get to looking at some of the competition later and making side-by-side comparisons. What these comparisons often ignore is that a Predator generator still provides substantial power. Moreover, it does this at a far lower price than most of the competition.

The Predator brand is well-respected for its reliability. Beyond this, the Predator 4000 generator is certified Epa III Special. When you consider that generators provide a lifeline in a power outage or an emergency, reliability is super important.

For these reasons, a Predator generator is an ideal choice for many people. An operational standard of 3200 running watts is nothing to dismiss. For the price that the Predator 4000 generator retails at, it’s perfect for householders and those of us who love the outdoors.

How Loud Is the Predator 4000 Generator?

As you’ll notice from the comparison, the Predator 4000 is not the quietest of generators. If you’re headed out into the country for some quiet time, it may not be the best portable generator for you. However, we think that its positive features more than compensate for the engine noise for most purposes! The 70dB isn’t quiet. It’s roughly equivalent to a vacuum cleaner, but this is if you’re right by it.

Plus, if you’re using this generator in an emergency, chances are you may not care that much.

The Verdict: Should I Buy It?

The Predator generator requests a mid-tier price for a quality, high-tier product. If you need a durable portable generator that can withstand running for up to ten hours at 50% capacity, the Predator 4000 is what you need.

Let’s start with the basics. Its construction includes a fuel-efficient engine that protects its longevity with shutoff features. It is adaptable to three different outlet types, providing high versatility for various projects and setups. With a peak wattage of 4,000, there is no doubt that this generator can power high-wattage equipment and tools like power saws.

If you want a durable, long-lasting engine that can easily handle 4000 watts and run for 10 hours, get the Predator 4000 for your RV, home, harbor freight, or another worksite.

Predator 4000






Ease of Use




Leave a Reply

Your email address will not be published.