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Harbor Freight 
Amazon | Price history for the Predator 4375 | |
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| Latest updates:
Since: January 27, 2023 |
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Description
Zoom on the Predator 4375
In a nutshell, the Predator 4375 is a compact portable generator mostly geared towards:
- RV travellers looking for even more independence
- Occasional participants of outdoor events, competitions, concerts and festivals
- 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 in need of safely powering high-intensity work or lighting equipment
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 Predator 4375
The Predator 4375 houses a 212 cc (6.5 hp) OHV 4-stroke engine, which provides 120/240V, consumes gasoline and delivers a running wattage of 3,500W along with a peak wattage of 4,375W.
Enjoying a noise rating of 72 dBA (just slightly more noisy than a shower), this generator gets running thanks to a conventional pull-start mechanism.
The 4375 can operate for around 16 hours at 50% load with a full tank (fuel consumption around 0.3 GPH), due to its fuel capacity of 4.8 gallons.
Outlets
The control panel features the following 5 AC outlets:
In addition, it provides 1 DC outlet: there's a 12V 8A (cigarette lighter style) receptacle with which charging your batteries is made easy.
Because the 4375 is equipped with a twist-lock L14-30R receptacle, it is transfer switch ready: it can power your home during a power outage, as it can be easily connected to your breaker box to power your household.
Portability
The Predator 4375 has the following dimensions: L23.3 x W18.7 x H19.3 in. In combination with its conventional, open frame design, they provide support and allow the generator to be raised above ground level. The featured design is ideal for the outdoors and all tough environments.
Even though this device may be technically portable (as in movable), manipulation and transportation without special equipment can be a challenge, as it weighs 105 pounds. However, its challenging mobility is solved by a wheel kit (separate purchase), which will ease its displacement, once it is on the floor.
Features
The 4375's control panel
A light indicator shows you if the oil level is too low.
Thanks to a built-in fuel gauge, the 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.
The unit also benefits from the Predator's CO SECURE™ carbon monoxide detection. This system monitors the accumulation of CO gas while the generator is running and will shut off the engine if the levels become dangerously high.
Besides the usual set of documentation and owner's manual (opens in a new tab) to get you promptly started, Predator also included a tool kit in the 4375's packaging.
Emissions
The Predator 4375 is EPA-approved and CARB-compliant. It can therefore be sold and purchased in all 50 states, including California.
Moreover, it features a spark arrestor, which makes it suitable for use in forested areas.
The unit also meets the ANSI/PGMA G300-2018 safety and performance requirements.
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).
- Having a dry weight of 105 lbs, the Predator 4375 belongs in the expected weight range for generators which produce 3000 to 4000 rated watts. Regarding dry weight, one of the champions in the same power range is the Pulsar PGD40iSCO, with a dry weight of only 46 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. If you’d prefer a less noisy device, one of the most quiet devices, which share the same power range with this one, is the Westinghouse iGen4500DF, whose lowest noise levels reach just 52 dBA.
- Since the 4375 boasts with a run time of around 16 hours at 50% load, it can be safely judged as one of the devices with the highest run time among those of a comparable output.
- 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. With an estimated gasoline consumption of 0.3 GPH (gallon per hour) at 50% load, this generator is among the more fuel efficient of the products in the above-mentioned wattage range. If you wish to further improve in the area of fuel efficiency, the Pulsar PGD40iSCO, which boasts with a gas consumption of only 0.22 GPH, may be the right generator for you.
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 average side of the price range.
Therefore, this generator nicely fits in the expected budget for this kind of product.
The bottom line
- In the expected price range
- CO SECURE™ technology
- GFCI Outlets
- High run time
- Fuel efficient
- Decent weight (105 lbs)
- No data center
- No electric start
- Wheel kit not included
- Weak warranty
- On the noisy side (72 dBA)
Features and Specifications
| Inverter | No |
|---|---|
| Parallel capable | No |
| RV ready | No |
| Fuel | Gasoline |
| Engine | 212 cc OHV 4-stroke |
| Starting system | Recoil |
| Warranty | 90 days |
| Voltage | AC: 120/240V 60 Hz, DC: 12V |
|---|---|
| Running watts | 3,500 W |
| Starting watts | 4,375 W |
| Running amps (@120/240V) | 29.2/14.6 amps |
| Peak amps (@120/240V) | 36.5/18.2 amps |
| Run time @50% load | 16 h |
| Run time @25% load | Unknown |
| GFCI outlets | Yes |
|---|---|
| Covered outlets | Yes |
| Automatic Voltage Regulation | Yes |
| AC outlets |
|
| DC outlets | 1x 12V 8A (cigarette lighter style) |
| Data center | No |
| Indicators | Low oil |
| Fuel tank | 4.8 gal |
| Fuel gauge | Yes |
| Weight | 105 lbs |
|---|---|
| Approx. dimensions (L x W x H) | 23.3 x 18.7 x 19.3 in |
| Noise (lower limit) | 72 dBA |
| THD | Unknown |
| Compliance | CARB, EPA, ANSI/PGMA G300-2018 |
| Security | Low oil and overload protection, CO monitoring |
| Spark arrestor | Yes |
| Neutral | Bonded to frame |
| Accessories included | Tool kit |
| Other model numbers | 59132 |
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 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 Harbor Freight'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?
| Item | Running Watts | Starting Watts | |
|---|---|---|---|
| At home | Sump pump (1/2 hp) | 1050 | 2150 |
| Furnace fan (1/2 hp) | 875 | 2350 | |
| Refrigerator (energy star) | 192 | 1192 | |
| Rice cooker | 650 | 650 | |
| Total | 2767 W | 4242 W | |
| For camping | Radiant heater | 1300 | 1300 |
| RV refrigerator | 180 | 600 | |
| RV AC (11,000 BTU) | 1010 | 1600 | |
| Slow cooker | 270 | 270 | |
| Total | 2760 W | 3350 W | |
| For work | Grinder | 1400 | 2500 |
| Demolition hammer | 1260 | 1260 | |
| Bug zapper | 80 | 80 | |
| Total | 2740 W | 3840 W |
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 18 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.
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"
What’s the wiring look like mine came undone need to wire the start Hutton back up (Asked August 19, 2021)
The wiring diagram can be obtained through Harbor Freight's Customer Service: 1-800-444-3353.
Is the 240 outlet GFI protected (Asked September 06, 2021)
Only the two 5-20R duplexes are GFCI protected.
Does this unit require a battery? (Asked October 01, 2021)
The unit does not require a battery.
What is gas mix oil ratio for predator generator (Asked October 30, 2021)
The engine is 4-cycle, so do not mix gasoline with oil.
Where do I go for spare parts? I need a new starter pull cord assy. (Asked March 15, 2022)
Replacement parts can be ordered directly from Harbor Freight: 1-800-444-3353.
Is the predator 4375 solar panel compatible? (Asked January 13, 2023)
The unit requires gasoline to run. It cannot store solar energy.
Couldn't find the right answer for you? Ask your own question.
User Reviews
4375 a real power house in Disguise
No excuse the Total Harmonic Distortion (THD) is not posted. Very important for not trashing some sensitive electronics.
Mine only lasted me one year and 2 weeks then engine locked up
Ran our home during a 4~ day outage. Used the HF 50’ generator cable with it. Ran our fridge, all lights, 10k BTU AC, multiple fans and more with ease. Very good on gas. Noise isn’t bad at all. Sounds like every other generator I’ve ever heard.
I live in a neighborhood, if my neighbors are bothered by the noise, they can chip in. Can’t even hear this generator on my back deck while inside with the doors shut.
Really should come with the wheel kit as the photos advertise it with it.
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!!
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!
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.
Love this product, always wanted to own. Generator and this one was perfect for the price and accessibility.