Frequently Asked Questions

Find Answers to Some Pressing Questions Regarding Your DuroMax Generator

As you start to use your Duromax generator, you might come across different issues that you will have to find anwers to get the best out of your generator. Most questions are usually around:


and a whole lots more.

Find answers to some of these questions here or click on any of the related sub-topics above for more answers. If you are not able to find answers to your question, feel free to contact us via our contact us page and we shall get back you as soon as possible.

Fuel Type

I am considering buying a duromax generator, however, I want more information about the fuel type.


Generators can be powered by propane, gasoline, diesel, natural gas, or solar energy. Duromax generators are designed to run efficiently on either Gasoline or Liquid Propane or both as some model allows you to switch between fuel types. Duromax customers have enjoyed the versatility of bi-fuel generators (dual fuel generators) and tri-fuel generators that are often referred to as hybrid fueled generators.

When Propane and Gasoline are both readily available, you can choose your fuel type based on the price at the pump. This allows you to save even more money over time.

Duromax XP4400EH Low Voltage Output XP10000EH

DuroMax XP4400EH starts on gasoline but the panel shows low volatge output: about 50-60 volt in 120 volt mode, and about 120 volt in the 120/240 volt mode. The measurement with an external voltmeter confirms these number. What is the likely problem? Thanks.


Replace the automatic voltage regulator.

Gas is Not Getting to the Carburator of My XP4400Eesponse:

My DuroMax generator xp4400e will not start. I bought it about 1
year ago and have used it once for about an hour, gas doesn’t seem to be getting in the carburetor the line going to it has gas.
What do I do?


Did gas get left in the motor for a whole year? I would dump the old gas and clean out the carb with carb cleaner. If it is varnished really bad i would replace the carburetor.

Where is the Negative Battery Cabel?

We purchased the XP4400E generator but it has no negative battery cable so the battery is not charging, which keeps me from using the key to start it. How do I get one please?


Negative battery cable is located between the gas tank and the top of the motor. It is a white cable with a black rubber cover on the end. It is bolted down on one end to the top of the generator head. you will need to reach in on the narrow end by the muffler.

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Can you please send me a list of places where I can get my 2
Duromax genes serviced in Los Angeles?

Response From DuroMax Customer Support: We do not offer repair services so we do not have such a list.

How should I Periodically Recharge The battery On My XP4400e Without Running The generator?

Run the unit for 60 minutes and the generator will charge its own battery.

September 2, 2013

Is the DuroMax XP4400EH 7 HP Dual Fuel Propane/Gas Powered Portable Electric Start Generator CARB compliant for use in California?

September 5, 2013

The DuroMax XP4400EH 7 HP Dual Fuel Propane/Gas Powered Portable Electric Start Generator is not CARB compliant for use in California?

There is a link to a CARB Compliance generator.

August 22, 2013

Are the two 120v 20A 3-prong outlets on separate circuits.  Can I connect a 120/20 wire (black, white, ground) to the plug for the L5-30 outlet?  The user manual that came with it was basically a start-up version.  I tried your download site and could only find the 4400 manual, although the 10000 parts download did give me six pages, wiring diagram and parts.  Is there a more complete manual explaining the power outlet use more fully?  Thanks.

August 29, 2013

The 2 standard house plugs are on the same circuit. The owner’s manual is the only literature that we offer for that unit. The 10,000 unit is not a good reference for this unit because it has different outlet setup and a much bigger generator.

August 21, 2013

Do you sell generators that run on gas and propane?

August 29, 2013

Check out the XP4400EH.

August 19, 2013

I recently purchased a DuroMax XP4400E and plan to install it permanently to my travel trailer. Do you sell a remote start kit for it, or can you tell me which wires to tie into? Also does it require a different carburetor with automatic choke or is there a way the standard carb can be used? If an automatic choke is required, do you sell such a product?

August 29, 2013

We do not offer a remote start kit for our units because they have a manual choke on the carburetor. You could check into aftermarket parts for these items and then it would work........ (Duromax Customer Service)

August 11, 2013

I bought the Duromax 10,000watts gen, and have been using it for just over two months, but the noise level suddenly increased so high that it makes sense to wear earmuffs in my house while the gen is running. Is there a way I can lower the noise or re-engineer the exhaust line to lower the noise?

August 13, 2013

If the noise level suddenly increased I would check out the exhaust system to see if something broke or has come loose. You should not have a noise increase after a few months unless you use the unit 24/7 around the clock. It may be time for an oil  change perhaps, and a check into your valve clearances.

August 10, 2013

I have the Duromax 10000e I puchased from amazon.  When I start it up and turn on the auto idle it idles down find . When plug a saw or drill it will not increase the engine speed, I have to turn it off the auto idle to run anything . This generator ran great during super storm sandy for 2 days. I cannot find anyone in south jersey to work on it . I have only had it 10 months and thing this should be covered under warranty. I need this with hurricane season coming.   Any help would be great.

There is nothing wrong with this generator. You should turn the switch off to raise the rpm’s of the engine before powering something. The idle control feature is mainly meant for construction site purposes and not standard home use. The best way to find a service center is to do a Google Maps search stating “small engine repair” and your zip code.

August 3, 2013

I purchases this generator less than a year ago and the breaker trips several times a day in my trailer. gen has less than 60 hours on it at the time the breaker trips there is less than 18 amps load on generator.

I am running ac which has a starting amperage of less than 19 amps
it will run ok for a day or two then we are back to tripping breaker.

I am electrical contractor so I put amp meter on panel to insure that load is what I am saying. I am running gen on 120 settings plugged into 30 amp twist lock.

Any suggestions would be appreciated

August 6, 2013

Make sure you are running the unit on the 120V only setting. Double check the connections on the back side of the breaker to ensure nothing is loose.

August 3, 2013

I have recently purchase Brand New DuroMax XP4400E from unlimited tools about 3 month ago.
I am running into a problem where the breaker keep popping off on 10 or 12 AMPS tools.
Is there any recalls on the breakers XP4400E  or its could be a bad apple ?

Please let me know


August 6, 2013

Is 10 or 12 Amps the rated amperage or the surge amperage. Most items with an electrical motor like power tool, require twice the amperage at start up. This could explain tripping the breaker if you are starting more than one at a time. There are not any recalls on the breakers. I also would double check the connections on the back side of the breaker to ensure nothing is loose.

August 1, 2013

Does the DuroMax Duel Fuel 4,400 Watt Hybrid generator XP4400EH sold at include a Wheel Kit.

August 6, 2013

All of our generators come with a wheel kit except for the XP4000S model.

July 29, 2013

The subject generator I just bought has the propane gas hose attached. Can I connect it directly to a propane tank or do I have to attach an additional Pressure Regulator Valve as depicted in Figure C, Page 11, of the Owner's Manual?


August 2, 2013

You only need to connect the propane hose to the propane tank. The purge valve button will act as the regulator for the system so there is no need to add another external regulator. Figure C in the manual is incorrect.

July 29, 2013

I started my duramax 10,000 watt unit and the recharge indicator light come on when the unit was started and sayed on when running the unit.  I ran the unit for 30 min.

Is this normal operation or is this a warning light.   I didn't see any info in the manual about that light.

July 30, 2013

This light will stay on if the Idle Control is on. You want to run the unit on high idle to recharge the battery. This light will stay on while the battery is charging. The battery normally charges fully in 45-60 minutes. It is only an indication of a low battery.

Thank You,

July 28, 2013

I own a Duromax XP6500E, it runs but I get no power. Is there any troubleshooting steps that I can do to find out what the problem is? I noticed in the owners manual it talks about replacing the carbon brush or AVR. Is there a way to check these components to see if they are bad or not? Any help would be greatly appreciated.

July 30, 2013

You can only check the carbon brushes. You can remove them and inspect the carbon posts. They should be worn smooth. If they are uneven, gouged, melted, broken, or cracked then they need to be replaced. There is no way to test the AVR. You will want to use a volt meter to test the terminal block to see if the unit is making power. You should see 120V from L1-L2 & 120V from R1-R2. You will get 240V from L1-R1 or L2-R2. If all looks good then the only thing to do is replace the AVR.

Thank You,

July 23, 2013

Please i want  your address in berline.

July 30, 2013

There is no address in Berlin, Germany.

Thank you

July 23, 2013

What is your btu rating for the DuroMax XP 10000E 16 hp generator?
Thank you for your help.

July 25, 2013


I’m sorry, but we do not have a BTU rating for our generators. I did look up a Watts to BTU conversion calculator online and it states that 8000 rated watts for this unit is 27297.133064 BTU’s.

Customer Service

July 19, 2013

I ordered a xp10000e on 2/1/13, the ist time i used it, last week, it ran for approx 1 hr, than the pwr went off. replaced both voltage regulator & brushes, still no pwr. This is 6 months, still under warrantee, how can u help me get it repaired?"

Thank you

July 25, 2013

Good morning

You will need to take the unit to a local service center to have them diagnose the failure. Once the issue is known, call the Duromax parts department at 800-629-3325 to order any necessary parts.

I purchased a DuroMax 4400E generator last fall.  I have misplaced the manual that came with it.  Is it possible to get another copy?
Also, do they make an adapter or extension cord that will plug into the 30 amp outlet and then allow me to plug in my 220 plug from my air conditioner?  I have not been able to find one.
Thank you for your assistance.
Richard Ciano

July 19, 2013

Hello Richard.

What version of the 240v plug does the air conditioner use?

Download the copy of the manual here.

July 16, 2013

Hi my name is Tess. Is there a adapter kit for the XP4400E so it can run on both gas and propane? I am looking at a unit someone bought but does not need it anymore and it's been used once. Does it avoid the warranty?


July 19, 2013

Purchasing a used unit from another individual would not have a warranty. The warranty does not transfer.

You can purchase a conversion kit from, and it would void the warranty if it were to carry one.

July 16, 2013

We are interested to purchase 2 units of your Duramax portable generators. Pls advise the local agent in Singapore, if any.


July 19, 2013

Hello Suzanna.

Sorry, I do not know of any agent in Singapore but you can check it out here:
DuroMax XP10000E 10,000 Watt 16 HP OHV 4-Cycle Gas Powered Portable Generator With Wheel Kit And Electric Start

I think they will deliver to you in Singapore.

Best Wishes

July 12, 2013

The key switch is no longer working. It will not start with the key, yet battery is charged. Starter works if I jump it. Where would I get parts? I live in Chicago Area, IL

July 18, 2013


The starter solenoid seems to be the issue.

What name were the generators purchased under?

The units carry a one year parts warranty.

July 8, 2013

My XP4400E generator quit today after running 6 hours. Gas was spewing out all over the side near the oil filter. Gas was all over the floor of the shade too. I turned off the gas and put the choke back to off, and the leak was less but still dripping. The tank was empty by then. The gas tank has big creases in it now and I think it had leaked from a seam. I live in Arizona, near Phoenix. I have the generator under a shade that was built for it, and one large side of the shade was open, so it got ventilation. I filled the tank a little bit over 3/4 full. I love my generator because I don't have electric out here, I only have a small solar panel system. I use the gennie for running my small air conditioner and lights. Can I order a new gas tank? I love my gennie! Its easy to start and runs great. I keep the oil changed and I really baby it. BTW, I bought my gennie a few months ago from Amazon. Thank you.

July 8, 2013

Here is the response to your question from the Duromax Customer Service team.

As to this customers concern:

You can order a new tank from us. You would need to call our parts department at 800-629-3325 and email us a copy of your Amazon invoice as well. It sounds like you had a vapor lock in the tank. Filling up too much gas in the tank will clog the breather valve next to the gas cap and will cause gas to leak out of the air breather box and the tank can suck in on itself like you noted. You will need to drain gas out of the tank and pull out the breather valve and blow through it to clear the clog. It is best to not fill up the tank past the bottom side of the strainer cup underneath the gas cap.

July 5, 2013

I am thinking about buying your Duromax Dual Fuel Hybred generator.( any coupons by any chance?)
Thank You,

July 8, 2013

Hello. I do not have any coupon at the moment.

June 28, 2013

Who manufactures this Generator and where is
their Factory located? Can I have it shipped to California or Nevada?"

July 1, 2013

Here is the response to your question fron the Duromax support team.

Good Morning -

We design the generator in California, but it is assembled in China. We stock replacement parts in our California warehouse to ship all across the country.

June 26, 2013

I purchased and registered a DuroMax XP10000E. I have not started the unit yet as I either misplaced the key or never received one.

Is it possible to obtain another key? Really looking forward to using the generator.

Best regards,

June 26, 2013

Thank you for contacting us.

To obtain another key you are to phone the parts department at 800-629-3325 to order a new set of keys. You will also need to email  a copy of the sales invoice to validate your warranty and cover the cost of the parts.

I hope this helps.


June 14, 2013

I purchased a Duromax 4400 watt dual fuel generator through Homedepot in Yulee, Fl.  ! question, Where's the key at? Seriously....can't find the key anywhere...not taped to the underbody...wasn't in the tool kit where to be found....some help please? Thank you.

June 17, 2013

The keys should have come in the package with the owners manual or in with the wheel kit. If a key is missing it is best for the customer to call the customer service number to and they will send us a parts request.

June 5, 2013


Just purchased my 1st DuroMax Generator and am looking forward to years of great use.

I have one suggestion and that is to have a keyed gas cap to prevent gas theft.

In the past I have had the gas siphoned from an older unit and with gas going way up in price I don't doubt that will happen again.

June 5, 2013

Great to hear you got your generator and I wish you a pleasant experience using it. And thank you for your suggestion, guess experience is the best teacher.

June 3, 2013

Could I use Natural Gas instead of propane on my new 4400 DuroMax Generator?  I just have to change the hose...correct?

June 3, 2013


Here is the response to your question from the DuroMax Customer Service.
"Our propane unit is not capable of running off natural gas. The system would require a different hose, carburetor, and jet set".

June1, 2013

I bought a generator from DuroMax in March and it currently does not work.  Also this generator did not come with a user guide.  Please let me know how I can proceed exchanging this faulty generator for a working one, thanks.

June 3, 2013

Generator cannot be exchaned unless there is a failure that is not repairable. The warranty covers parts only so you would have to get a diagnostic done at a small engine mechanic to verify the failure and perform the repairs. Repairs and shipping would be the responsibility of the customer.

May 30, 2013

I am interested in changing over my duromax generator from gasoline to propane. Is it possible ? Do u sell the kit if so? And how difficult is it?

May 31, 2013

We currently do not offer conversion kits for our units, however, it can be done. The best place to look for conversion kits is

May 7, 2013

Hi. I purchased a 10000 watt generator from your company. I am very happy with the product but it doesn't start. I got it to run for about 30 seconds and then the charger battery light came on. I was wondering how do you charge the battery or is there something else wrong?

May 31, 2013

Please make sure that you attached the negative battery cable to the battery.

May 16, 2013

I am considering buying the DuroMax Duel Fuel 4,400 Watt Hybrid Propane/Gasoline Portable Generator. I am interested in running the generator on propane. Can I hook this generator to a large propane tank such as #57 or a #420?

Thank you in advance.

May 31,2013

The generator will run 20 hours on a standard 5 gallon / 20lb tank (like for your BBQ). You can hook the unit up to a larger tank, just make sure that you have a high pressure line with out a regulator going directly to the generator as the generator already has a regulator installed.

April 24, 2013

Hello, I recently purchased a 10,000 watt DuroMax generator and the definite purpose 2 pole contractor burnt out. I will buy another replacement but need to know what the MFG is Coil Voltage and how much amps contacts are rated for.
Fast response is appreciated.

May 8, 2013

Please look at the parts listing I have attached and reply with our part number. We can look up this information for you.

Note: Contact Us if you require the part list.

Float Needle and Seat for Duromax XP10000EH

Float Needle and Seat for Duromax XP10000EH

 I have had an XP10000e for over a year.  I crank it and run it about once a month for about 15-20 minutes.  The last time I went to do so, the engine would turn.  I pulled the manual crank rope and it seemed the engine was seized.  Turns out gas had leaked into the crankcase. I disassembled the carburetor and found nothing out of the ordinary  I drained the crankcase let it dry, refilled the oil and she cranked right up.  I am wanting to replace the float needle and seat and need to know what type/manufacture is compatible.  Can you help?