DuroStar DS4000S 4000 Watt 7.0 Hp air cooled OHV gas engine portable RV generator


Item Number: DS4000S

Retail Price: $729.99

Our Price: $399.00

Out of stock Ships within 24 Hours


The DuroStar DS4000S 4,000 Watt Generator is designed by the professional, for the professional. It features a Fully Loaded Power Panel that is the main control center for the Generator. The Power Panel also has the Engine Shutoff switch, Volt Meter, and Circuit Breakers. These units are EPA approved for safe use in U.S. National Parks and mandated Jobsites. The Powerful 7 HP Durostar Engine is Air Cooled and can withstand use and abuse. This Generator has everything a Great Generator needs, but at a price that everybody wants.

This DuroStar Workhorse can operate anything from Air Compressors, Air Conditioners to Basic Home Power (lights & fridge). The DS4000S is a tried and true piece of equipment. It is well worth it's weight in gold; as soon as the box is opened you will be amazed at the amount of thought and science that was put into designing this unit. No corners have been cut in the manufacturing or assembly of these units.

Only as Strong as Its Core. The DuroStar DS4000S unit features a 7 Horsepower, Air Cooled Engine and is designed with a Low-Oil Shutoff Sensor to protect the Motor. Built to offer more power and longer lasting durability, The DuroStar DS4000S Generator has a Cast-Ironed Sleeved, 208cc Engine rated at 7 HP delivering a peak of 4,000 surge watts / 3,300 Constant. This is a sufficient amount of power that can handle an overhead Air Conditioner in a RV to basic house power.

Safe & Reliable Operation for Any User. Designed for Safe and Easy Operation, the DS4000S features a user-friendly, Recoil Start, that's easier than starting a lawn mower. The attached oversized noise reducing Muffler has a built-in Spark Arrestor for safe use in mandated camping areas and jobsites. This unit can be tossed around on the jobsite or truck mounted for maximum security. It also is available with a optional Wheel and Handle kit, this makes transporting it a breeze.

Easy Out of Box Operation & Peace of Mind. DuroStar Generators all carry a 1 Year Factory Warranty so if for any reason your generator gives you problems simply let us know and we will do our best to make it right. As always FAO offers its 30 Day Satisfaction Guarantee standard on every item we sell.All DuroStar Generators are user friendly and are ready to use out of the box within minutes. Simply remove all packaging, add Oil and Gas and it is ready to begin producing power.

What Sets DuroStar Generators Apart From The Rest?

  • Powerful: Powerful 7 HP Engine is able to accept high wattage loads with ease.
  • Functionality: This Generator has endless uses; from Home Standby Power, Jobsites to a Weekend with the RV.
  • Safety: Equipped with Low Oil Protection, AC & DC Regulators, and a Spark Arrestor, Your unit will remain safe and in top operating condition. Ease Of Use: This unit was designed to allow anyone to start and operate.
  • Recoil Start: Simply use the E-Z 1-Pull Recoil Cord to start the Generator.
  • Knowledgeable Service Dept: Our Friendly Technicians know these units inside and out. Have a Technical Question? Give them a call and they will be glad to help you out.
  • Peace of Mind: Rest assured, your buying a quality unit at a low price from one of the largest Generator Sellers on eBay. We meet and exceed strict eBay standards while having the feedback that speaks volumes about these units.


  • Heavy duty frame with four point fully isolated motor mounts for smooth quiet operation.
  • Full power panel with oil warning light, volt meter, circuit breaker and power outlets.
  • Run-Time [ @ 50% Maximum Output ]: 8.0 hrs.
  • Low oil shut-off protects engine.
  • Quiet Muffler reduces engine noise.

What's in The Box

  • DuroStar DS4000S Recoil Start Generator.
  • Generator Tool Kit.
  • Owner's manual


  • 3-Year Residential Limited Factory Warranty
  • 1-Year Commercial Limited Factory Warranty
  • 30 Day Satisfaction Guaranteed
Brand DuroStar
Model DS4000S
Max AC Output (Watts) 4000
Rated AC Output (Watts) 3300
Fuel Tank Capacity (Gallons) 4
Engine 7Hp DuroStar Air Cooled OHV Engine
Low Oil lamp/Shutoff Yes
Start Type Recoil
Spark Arrestor Yes
Run Time @ 50% Maximum Output (hrs) 8
EPA Approved Yes
Current (Volts) 120
Amps 33 / 16
Decibels (db) 69
Horsepower (HP) 7
Torque (ft/lb) 9.7
Displacement (cc) 208
120V 20 Amp Standard Receptacles 2
120V 30 Amp Twist Lock Receptacles 1
Customer Reviews

Average! Customer Rating:

(10 Reviews)
DuroStar DS4000S 4000 Watt 7.0 Hp air cooled OHV gas engine portable RV generator

Items 1 to 10 of 34 total

per page
September 20th, 2016

I like smaller generators

Big generators are fine, if you have lots of gas to keep them running. I like smaller generators that use less gas. I have a 2 stroke 1000W that runs a full sized fridge and a few low energy lights. I wanted another generator as a backup and to run some larger items, especially a pump motor. I also bought the wheel kit and cover as the generator will be stored outside. Put the wheel kit on immediately before you add gas and oil, because the directions tell you to turn the generator upside down to do the installation. Make sure you know where the handle will bolt on so you know to put the wheels on the opposite side. The bolt holes line up on both sides and I had to reverse the wheels which took some extra time. The hardest part was taking off the rubber feet. Otherwise it is an easy installation of the wheels and handle. Next I added the oil and about a quart of gas. The generator started easily once I felt around and found the choke lever. It runs quiet, and with little vibration. It powered several items that took about 2500W with no issues. There is a bit of an odor coming from the muffler as heat burns off some oil left over from the manufacturing process. The cover is a nice fit and the unit rolls very easily on the wheels. Without the wheels I'd say it is a two man operation to move the generator comfortably. One strong guy can handle moving it, but the position is awkward and risks back injury. My generator shipped cross country (from CA to PA) and the box arrived in good shape. It just took a few days to make the trip. Free shipping makes a good deal into a super deal.
Lake Ariel, PA
January 24th, 2015

emergency tool

good product, good price, good delivery
October 15th, 2014

Great generator

received it in five days from ordering and I must say so far so good.
Tile contractor
October 5th, 2014


Worked just as described. Note, there is a choke for starting a second time. Easy to set up, easy to start with one pull, little vibration, and low sound output. Very pleased especially with the price which saved me over $100 from others looked at when shipped.
September 3rd, 2014

Excellent product and value

Bought this generator to power my new workshop. It has performed as advertised, and been a dream to operate. Starts on first pull 99% of the time; runs beyond specs on a tank of gas. I have used it every day for the last few weeks. (The folks who make this generator also listen to their customer's feedback. There were several comments made about the need for a long-necked, clear tubed oil funnel to fill oil properly. My unit came with a simple funnel with a clear tube attached that works perfectly!)
May 12th, 2014

great generator

Arrived fast in good shape. Started on second pull. Quiet and smooth. Seems like a very good unit for the price.
February 12th, 2014

Excellent Value

My first time ordering from GFO and the process was smooth. Excellent price with free shipping! The unit works great and is much quieter than the older portable generators.
November 22nd, 2013

Nice Generator

It started on the 1st pull and ran like a champ.
September 17th, 2013

Great generator for the price!

I am a contractor and own a small farm. Over several decades I have owned and used several generators of this size range. This generator started the very first pull, and has started the first pull every time subsequently. For a 4000W it is very quiet. You would have to pay almost 10 times this price to get a Honda to get it quieter...not worth the price. I changed the oil after 5 hours, 10 hours, and 20 hours. Very important in these small motors to help insure a long life. After that 20 hours is fine for oil change intervals. The generator has run very smoothly when using and starting up numerous saws, tools, etc. I only have 20 hours on it so far, so I cannot say what it will be like after a year or so, but so far, I am very happy with the generator and the Wheel Kit that I got for it.

March 1st, 2013

Great for the price

I bought this for my Jayco 5th wheel and it works great

    Items 1 to 10 of 34 total

    per page
    • Item Number: DS4000S
    • Retail Price: $729.99

      Our Price: $399.00