Generator problems can be frustrating, and one of the most common issues is when the generator runs for a few seconds and then stops. There are several possible causes for this problem, including:
- Fuel Issues: Ensure the generator has enough fuel in the tank and that the fuel is clean and fresh.
- Carburetor Problems: A dirty or clogged carburetor can cause the generator to stop running. Clean the carburetor or have it professionally serviced.
- Choke Malfunction: If the choke is stuck in the closed position, the generator may not be able to start or may only run for a few seconds before stopping.
- Air Filter Issues: A dirty or clogged air filter can restrict airflow to the engine, causing it to stall. Clean or replace the air filter as necessary.
- Spark Plug Problems: A worn or fouled spark plug can cause the generator to stop running. Replace the spark plug with a new one.
- Low Oil Level: Check the oil level and add more oil if necessary. Running the generator with low oil levels can damage the engine.
- Ignition Coil Malfunction: If the ignition coil is faulty, the generator may not be able to start or may only run for a few seconds before stalling.
- Faulty Voltage Regulator: If the voltage regulator is not working correctly, the generator may not be able to maintain consistent output, causing it to stop running.
- Fuel Pump Failure: A faulty fuel pump can prevent the generator from getting enough fuel, causing it to stall.
- Dirty Fuel Injector: A clogged or dirty fuel injector can prevent fuel from reaching the engine, causing the generator to stall.
- Overload Protection: If the generator is overloaded, it will automatically shut off to protect the engine.
- Wiring Issues: Loose or damaged wiring can cause the generator to stop running. Check the wiring and connections for any damage or wear.
- Low Battery Charge: If the battery is low or dead, the generator may not be able to start or may only run for a few seconds before stalling.
- Defective Sensor: A malfunctioning sensor can cause the generator to stop running or prevent it from starting.
If you are experiencing this problem with your generator, it is recommended to troubleshoot and fix the issue before continuing to use the generator
A generator is a very useful device at times of power outages. Sometimes, your generator may face some problems. One of the most common problems a generator faces is that it starts well, runs for a few seconds, and then shuts down. This can get very problematic as it stops important appliances from running, causes your security systems to go down, and disrupts business activities.
In this article, we will discuss how you can get rid of this problem. As this is a very basic problem, so most of the time, you can solve it yourself by identifying the cause. Here, we will identify the causes and suggest the best way to deal with them.
Fixing the “Few Seconds” Problem
Following are the most common problems and errors due to which you face this problem:
1. Overloading – The most common reason behind this problem is the overloading of the generator. When a generator is overloaded, it stops working and shuts down. This problem is commonly found in the latest models as old models do not have the necessary equipment installed to shut down in case of overloading. They continue to work and underpower your appliances. This feature is good for your appliances’ safety, saving them from stress.
Solution: The best way to deal with this problem is to reduce the load on the generator and then start the generator again. Now you can add the loads according to the size and capacity of the generator. Another way to ensure that the generator does not shut down due to overloading is to hear the sound of the generator. If the sound is getting too heavy than the usual sound, then you need to reduce the loads as your generator is overworking.
2. Oil Level – Your generator may sometimes shut down after a few seconds when there is a problem with the oil level. Either the oil level is too low or too high in your machine. With low oil levels, you can start your generator, but after a few seconds, the temperature of the oil rises too quickly and it causes the system to shut down. When the oil level is too high, it also causes the sensor to force a shutdown. Mostly generators with low oil level auto shut-down features turn your generator off.
Solution: Check your oil levels; keeping the optimal oil levels can solve this problem and help your generator’s smooth functioning. Here’re the best generator engine oils on the market to buy, do check them out.
3. Water Levels – Water levels in the radiator can also cause the system to switch off after a few seconds. The reason here is the rise in the temperature without proper water levels in the radiator. If the generator goes on running at a high temperature, the sensitive parts of the engine, control panel, and voltage meters can break down.
Solution: keep the water in the radiator filled. Make it a habit to check the water level in the radiator after a month. You can also use a coolant along the water to get better results.
4. Low Fuel – Sometimes, a minor problem, like less fuel in the fuel tank, can also cause your generator to run for a few seconds and then stop. The generator may have enough fuel to get started a couple of times or run without the loads, but it stops when you out the loads.
Solution: Check the fuel gauge on the control panel or do it manually. If you have an old generator, fill the tank and give it a try.
5. Fuel Tank and Fuel Pipes – Some of the most common problems that can cause your generator to stop working after a few seconds are associated with the fuel tank or fuel pipes that carry petrol to the engine and carburetor of your generator. The pressure can get locked in the fuel tank causing supply problems. Dust accumulation in the tank, restrictions, damage, bending, and leakage in the fuel pipes can also cause this problem. You can easily spot any leakage by petrol or diesel marks on the pipes or surface below your generator.
Solution: You can deal with problems with your fuel tank by cleaning it, releasing the pressure, and carefully checking the pipes for any problems mentioned above.
Fun Fact: Did you know when fuel sits in your engine and fuel tank for long, oxidation takes place; this oxidation creates new compounds that damages the engine. You need a fuel stabilizer to fix this issue.
6. Carburetor – The carburetor of your generator may have some problems due to which your generator is shutting down after running for a few seconds. Bad fuel left inside the carburetor can cause this problem. The volatile ingredients in the fuel evaporate from the accumulated petrol in the carburetor and a thicker mixture of sticks in the base of the carburetor causing disruption in the fuel supply.
Solution: This problem can be dealt with most of the time by thoroughly cleaning the carburetor. If this problem persists for a longer period of time and after getting your carburetor serviced, you will have to replace the carburetor.
7. Engine Fault – Some internal engine faults can also be the reason behind shutting down your generator. Such problems are usually difficult to diagnose.
Solution: Call the professionals for engine service and fault diagnosis.
8. Electrical Problems – This can also happen due to electrical problems in the circuits and wiring of your generator.
Solution: If you are aware of the electrical connections in your generator wiring, you can check them. Otherwise, it is better to get help from professionals.
9. Battery Problems – The battery supplies power to turn on the generator. When your battery is not charged properly, your generator may switch off after running for some time.
Solution: You need to get your battery charged properly from an external source or check the battery charging mechanism of your generator.
10. Choke – The choke might be turned on, and it may cause your generator to stop running after a while.
Solution: Turn off the choke and restart your generator.
11. Spark Plug – Spark Plug is one of the most important parts of your generator that plays a critical role in starting your generator. If the spark plug is fouled and out of order, then your generator will make cracking sounds right after starting and shut down in a few seconds.
Solution: Open the spark plug, and check its condition. Sometimes you can re-insert the same plug after getting it cleaned, or you will have to get a new plug for your generator.
12. Sensor Failure – Latest models of generators have a lot of sensors in them. These sensors can fail sometimes and cause your generator to behave inappropriately.
Solution: Check the notification on the control panel and replace any faulty sensor. Remember to re-program your generator after changing any sensor or any other part.
13. Air Filter – Blockage in the air filter can also cause this problem. If the engine is not getting air from the surroundings, it will automatically shut down in seconds.
Solution: Get the air filter cleaned or replaced. The best way to deal with such problems associated with air filters is to get them replaced on a timely basis.
14. Exhaust System – If your exhaust system is faulty, your generator cannot run for more than a few seconds. It is unable to release the exhaust and hence shuts down.
Solution: Make sure that the exhaust system is up and running.
Conclusion
We are hopeful that you will be able to fix the “few seconds” problem now very easily by identifying the problem and dealing with it reasonably. However, if the problem persists, we suggest you get professional help and get the problem sorted out. Ensure that you have placed your generator in a properly ventilated place.
See here in the video below how to fix this issue.
Thank you. The No. 1 solution solved my problem. Mine shut off due to over load and refused to start. I have to loose the fuel tank, remove it then loose the plug.
I cleaned the plug properly, then fix it back on the generator, boom. The generator start.
Thank you for your information
My generator runs only on propane, after sitting over the winter runs about 10seconds then quits
My generator runs only on propane sat over the winter turns over but won’t run
Let me try it maybe it will work for me
My generator is starting but for less than one minute. What can be the causes
I have the few second problem on a 9000 watt dual fuel. Checked everything and found no problems. I unplugged the secondary wire coming off the coil and it will stay running. It will not turn off with the switch.
If you are facing a switching off problem with the switch, there might be some issues with the cable
connections going towards the start box. Make sure you clean them properly. It can also happen due to
a faulty corroded splice. You need to check the wires that run from the generator to the dash switch.
Check all the wiring harness and examine the switch terminals. Once you are done with checking all the
wires and connections, you need to look at the switch as well. The switch can go bad over time and
requires a service or replacement.
Thank you for a job well done! Mr problem is that the generator will, run normal for some seconds, raised itself and off
First of all, you need to check that you are using fresh gas for running your generator. If everything
mentioned in the above fixes is ok, then you need to get your carburetor serviced. If the problem
persists after a carburetor cleaning, we recommend that you consult a mechanic or call a professional at
home before going for a costly carburetor replacement.
I really appreciate for the lesson let me check again and see because my generator was working and few seconds stop.
Dear Terry
We hope that you have solved the problem with your generator with the help of the above-mentioned methods. If you are still facing any issue, let us know, we will be happy to help. We have already tried to mention all the “few seconds issues” that generator owners commonly face.
My small tiger generator starts but in a few minutes, gets higher sounds and powers off as if 4th there’s no enough oil mixed with the fuel. Please what could be the problem with it?
Mine runs sometimes for about an hour and then suddenly stops
Dear Adibo
As you say that your generator runs for an hour and then stops, it means that it is not facing “few seconds” problems. This issue can happen due to several issues which are mentioned below
• The gas runs out
• Your generator may get overheated
• The fan belt may be a bit loose
• The fuel tank vent may be blocked
• Air bleed hole in the fuel tank may be blocked
• Your generator may have a thermal overload cutout which forces it to shut down after it heats up
• It may turn off due to a low oil level
Once you find out, what’s the problem, only then you can get it sorted. Let me know if you need any further help. I will be happy to help you out.
Please what cause a 7000 generator to stop working after sometime? Secondly how can I fixed the choke?
Have done all appropriate repair and taken to a small engine repair shop no results…
New help
Have you changed oil or is it Rolly runny. Once hot old oil will send a signal back as low causing theachince to turn off
My Kirpo KDE5000T diesel generator runs and powers smoothly for 30 – 36 minutes and the power cuts off while the engine continues to run smoothly. What are the likely causes of this problem?
Out of gas. Take the fuel cap off by twisting it counterclockwise then light a match so u can see inside tank. After initial explosion and subsequent fire is extinguished go ahead and refill fuel tank. If no leaks try to start engine. If no start check for no fuel again. Stand back this time.
Hi I have a wei generator , it start then stopped, I clean the carburetor throughly but I found oil in air filter, what should I do? Ty
Dear Mj
Oil deposition on air filters can happen due to a number of reasons. If everything is working fine, there would be no oil on the air filter. It can occur due to the following reasons.
• Clogged oil passages
• Worn piston rings
• Blow-by around the piston/piston rings into the crankcase happens while the engine is running. These vapors can get deposited on the air filter through the breather line.
• Worn out engine
You may need to call a professional for the above problems. However, you can solve this problem by yourself by checking/doing the following things:
1. Check the engine oil level. If it is too high, it can cause the oil to be blown out of the breather line and into the air filter.
2. If you are running the generator on a tilted floor, it can cause spillage on the air filter as well. Make sure you are running your generator on a solid flat surface.
3. Do not tip the generator on one side after you have stopped it.
Thank You!
Hi my generator starts very well with good supply but when when l turn it off will run for about two minutes
Dear Chinedum
Please understand that the carburetor of your generator has some gas in it, so it is always better to dry it out before storing it for more than 2-3 days. However, a generator may run for 5-10 seconds after you turn it off, that’s normal and not worrisome. As you say, that your generator runs for 2 minutes, you need to get the carburetor serviced, or there is some issue with the fuel pump.
Our 6500 ran for 5 days 24/7 then quit.Below freezing.Let it sit.Starts first pull idles great after a min. Just quits.Will start right back up first pull.Level ground fresh gas and oil and no load still same.
Give me instructions on how to fix my generator
Dear Max
If you can please specify what problem you are facing, we would be happy to help you out. We have already mentioned all the “few seconds” issues above, along with their solutions. We hope you would be able to find out a specific solution to your problem.
Can u recommend any professional generator mechanic in rivers state oyigbo to be pricise
Anytime we put on the switch for the water pump, the generator runs too low on voltage. What could be the problem and how can this be solved?
Dear Ubon
From your question, we understand that your generator is working fine and only makes trouble when you put on the load. The main reason behind the voltage drop is the excessive load of the water pump. It can happen because of the following:
• The water pump load is more than the capacity of your generator.
• There are other appliances running on the generator already. You can remove other appliances from your generator and then run the water pump alone on the generator.
• The speed control gain is set too low to respond to the load being applied.
We hope you would be able to solve this problem now. If it persists, call a mechanic.
I replaced the carburetor, fuel, oil, sparkplug and Cleaned the air filter. It still starts runs for about 10 seconds and dies which is what it was doing before I did anything. I’ve disconnected the oil full sensor but no change runs for 10 seconds and dies.
Dear DonC.
We recommend that you make a checklist of all the “few seconds problems” mentioned above and check them once. If your generator still dies after running for 5-10 seconds, you need to call a professional to get the issue sorted out.
It is a portable generator, It do shut down after some time of running. I suspected the chock on the cabburator so I bought a new one and problem still continue. When it want to off, it come with a noise, which I believe is fuel supply but I don’t know where the problem is.
Dear Johnson
A generator makes cracking sounds when there is some problem with the spark plug. It would be best if you made sure that the spark plug of your generator is clean and does not have any carbon/debris or dust. Remove the spark plug to find it out. You can take it to a nearby mechanic to get it cleaned. You can ask the mechanic whether it can still be used. If not, buy a new spark plug and install it. It will solve your problem.
My SS 1200 Sunshine mini generator goes off after working for 10-15 minutes. What could be the cause.
Dear Emmanuel
It can happen due to several reasons. We have mentioned all the problems which can cause a generator to go off after running for a few seconds or a few minutes. Since your generator runs for 10-15 minutes and then turns off. It can happen due to the following reasons
• The generator is overloaded
• The generator is getting heated up
• There is some issue with the fuel pump or fuel pipes of the generator
• The spark plug is not working properly
You can assess your generator by using a checklist with all of the above mentioned “few seconds problems.”
Thank You!
Please my generator has been given me headache first the mechanic said the issue was pistes and ring later it was choke now It runs for some seconds then it stops + there is sound coming from inside it as well. Is it possible for a gen to give develop problems for no cos am fade up ?
Please my generator has been given me headache first the mechanic said the issue was pistes and ring later it was choke now It runs for some seconds then it stops + there is sound coming from inside it as well. Is it possible for a gen to develop and give problems for no reason? Please what can I do cos am fade up of its constant issues. Thanks
Dear Grace
Sometimes there are little issues with your machines like a generator, which we ignore. The best way to get rid of “few seconds problems” is to ensure that your generator remains in good condition and is maintained regularly. You can make a checklist of all the issues mentioned above and assess your generator. The clicking sound is probably due to a faulty plug. We recommend that you do not call a mechanic until you have checked all the above issues. Go through all the above solutions, and you will find the problem and rectify it.
My new firman key starter switching off after few seconds and I still used it in the noon just a 2 weeks old can it be the oil because the oil not black yet
Dear Samuel
As you mentioned that you have recently bought a new generator, and you don’t run it much, so it cannot be the oil problem. Your generator is probably turning off due to an overloading problem. Ensure that the total load on your generator is less than the total power capacity of the generator. Another helpful way to prevent turning off after a few seconds is to add load one by one.
Thank You!
Hey so I have basically tried everything changed spark plug cleaned carb and unplugged oil sensor If I spray quick start it will fire up but stop immediately
Dear Eric
Quick start spray is a temporary measure to fire up your generator. It cannot be used as a permanent solution to get rid of all the “few seconds’ problems.” Your generator can be having problems due to a blocked fuel pump, engine problems, or air filter issues. There may be something wrong with the generator’s engine, and it needs a visit to the mechanic.
However, before going to a mechanic, we recommend making a checklist of all the fixes we have mentioned above. Your generator may be having startup problems due to a simple issue that can be solved at home.
Thanks
Thank you for your analysis. My generator stopped few minutes it was on i noticed odour from the engine side.Please what might be the problem?
Dear Akinola Olaniyi
Odors coming from the generator are probably due to short circuits or wires going bad. If your generator has an electronic panel, any wire, circuit, or component may be overheating, and the generator is switching off.
The best way to get rid of the problem is to catch the culprit behind the smell. You must check all the wires, circuits, plugs, or anything with an electrical connection to it. Replace the rogue part, and you would be good to go. One of the best ways to avoid odors coming due to overheating is not to overload your generator.
Thanks
My 55kv genie is shutting down a few minutes after running. It maks an alarm sound and cuts off.
Please help its a diesel one
Dear Brian
Alarm sounds from the generator are an indication that something is wrong with your generator. The generator goes off in order to avoid any significant damage.
We recommend that you make a checklist for all the fixes mentioned above and then check your generator. If nothing is wrong, we recommend you call a professional to help you with the issue.
Thanks
My fixed generac generator 10-30kW (18 years old, professionally maintained yearly, used rarely) runs about 2 minutes, in that time makes a CLINK noise 3 times, then cuts off. Went down your checklist and all seems fine. It has been very humid but that CLINK noise must have something to do with it. Any idea? Appreciate your time and help. I have a video. with the clink noise.
Dear Pamela
Glad to know that you have maintained an old generator very well. Clinking sound mostly comes due to a bearing knock or piston hitting a valve. It is an alarming situation, and we recommend that you get your generator tested before starting it again. We hope that the issue is not so big and it costs you less to get it repaired.
Thanks
Generator starts for a sec and shuts off. Last nite a camping neighbor wired 120 v into generator plug. im
sure we burnt out something cause now it only starts for second. Any ideas?
Dear Robyn
There is a high chance that you have burnt up some sensor or anything sensitive inside your generator. However, we still recommend that you go through the above checklist once before getting a costly repair.
Thanks
Good day pls am having disame problem I have 40 k.v.a DAT it start it stay like 5:to 15 mins den off. I unplugged the oil switch and the water switch but is till doing desame thing pls advice me on what to do
Dear Kenneth
The “few minutes problems” have several reasons. Make sure you are not overloading your generator, check the fuel level, look for any blockage in the fuel pump or pipes, and inspect your carburetor. You would also need to confirm that the engine of your generator is in perfect condition. You can also face this issue due to the overheating of any electric component, or your generator is simply not getting enough exhaust.
The best way to ensure that everything is fine is to make a checklist based on the above discussion and then go through it.
Thanks
How can i clean the calibrator
Dear Emmanuel
There are two ways to fix the carburetor cleaning problem.
1. Call a professional
2. DIY
The DIY may consume some time, but it saves you a lot of bucks. You can follow this video for all the instructions. https://www.youtube.com/watch?v=86kQMneoE2g. It is one of the most comprehensive videos available online and will guide you in detail. For exact information about your model’s carburetor, Google it with all the relevant details like make and model.
Thanks
I have a model PO1201
I starts right up runs for 15/20 sec.then starts to smoke and shuts down. This generator oil level is perfect . I have taken the gas cap off thinking there might be pressure building up. This is brand new generator that was won in a drawing.
Dear Joseph
Smoke from the generator is a sign of engine problems. Since you say that it is anew generator, it cannot be the engine. However, it can happen due to incomplete burning of gas or the clogging of the air filter. Smoke is also a sign that the engine has too much fuel in the cylinder compared to the air it needs. The lack of air in the cylinder results in black smoke, showing that combustion has happened and but the fuel has not been totally used. Similarly, if the oil is being burned in the cylinders, it indicates blue smoke.
We recommend that you check the gas filter. If your generator is new and in warranty, we recommend that you contact the manufacturers.
Thanks
Good day,
My newly bought Firman generator goes off after 20minutes, there is enough oil and fuel.
Please what could be the reason?
Dear Tee
As you recently brought a new generator, a faulty carburetor, gas cap, spark plug, and sensor issues are ruled out. It is possible that your generator is being overloaded. It can also happen if your generator is not getting enough exhaust.
We suggest that you check the load and then try again. If the problem persists, we recommend that you call the Firman customer service and get the problem sorted out under the warranty cover.
Thanks
4500 watt will run then die repeatedly then eventually run for a few hours then stop randomly
Dear Chris
Such issues can be related to different components of the generator. My experience says that there is some problem with your spark plug or fuel filter/fuel pump of your generator.
The best solution to your problem would be to make a checklist of all the above mentioned “few seconds problems” and then cross out the ones that are fine. In this way, you can have an overview of your generator’s condition and maintain it accordingly.
Thanks
okay let me give a try
Dear stalker
Sure! Give it a try and if you need to ask anything related to your generator. Feel free to get in touch again.
Thanks
I have a generac LP house generator that starts on manual then shuts down after a about 30 seconds and then tries to restart three more times but shuts down in shorter and shorter times. I have a new battery and I have tried this with the oil pressure switch connected and disconnected. I have oil in the system and my exhaust is vented out. I have had this generator for 10 years and have used it successfully in the past. Thank you
Dear Tolka
It seems like a sensor issue with your generator. If it were a battery problem, your generator wouldn’t start at all. Since your generator starts and then dies after 30 seconds, it can also be a component overheating in the electrical panel, which is forcing the generator to shut down. It is usually done to avoid some bigger damage to your generator.
Our suggestion is to get it checked from a Generac service provider. If you don’t already know about one, you can find one here: https://www.generac.com/industrial/find-service.
Thanks
My generator stopped working and now I does not want to start
Dear Tseko
When you don’t know what’s wrong with your generator, the best way to diagnose the problem is to go through a complete troubleshooting checklist. You can use the above “few seconds problems” as a reference for locating the source of trouble. In this way, you can pinpoint the reason for your generator not starting up. Once you know the problem, you can solve it.
If you find out the trouble and are unable to get rid of it, you can get in touch with us. We will be more than happy to help you out.
Thanks
To the gent in the video above regarding the Generac 7500 XL, Thank You!
Your video showed us not only what was wrong with but also how to fix our Generac 7550XL. Ours had the same issue and required the same fix. You probably saved us a couple hundred dollars in the end. I didn’t find this issue / fix anywhere else on the internet. With hurricane season approaching and living less than 5miles from the coast in FL, your fix was a godsend. If I could, I’d buy you a case of your favorite brew!!
Dear FLResident
Thanks for all your love. We are here to solve all of your generator problems.
Would definitely love to have a drink with you sometime! Your kind words mean a lot to us.
Keep visiting us for all generator fixes and best generators and equipment.
Thanks
My CAT C4.4 DIT stopped on high speed.
I tried changed the fuel filters and racco filter. I also check the governor actuator which is working.I have also cleared all the alarm.But the generator is now refusing to start. please work could be the reasons?
Dear Olayinka
We suggest that you go through the above checklist to find out the specific issue that why your generator is not starting.
If you are unable to find the issue and solve it, the only way left for you is to call for professional help. We recommend that you only get your generator repaired from a certified CAT mechanic.
If you don’t know about a certified mechanic, you can find yourself one here: https://www.cat.com/en_US/consumer/support/where-to-service.html.
Thanks
Hi about three months ago I noticed my Generac 15kw 0043903 had stopped its exercise cycle.
The over crank light was on.
When I tried a manual start, the generator started and ran for a few seconds and stopped.
I disconnected the oil pressure sensor and the engine started up and stayed running.
I ordered and replaced the oil pressure sensor, changed the oil and the plugs. The generator started on the first crank and kept running. I thought I was done. I just noticed that it stopped its automatic cycle and again says over crank. On manual start, it started up and got up to speed and then stopped after a few seconds.
I disconnected the oil pressure sensor, but this time instead of continuing running, its ran for a few seconds and stopped. I get the over crank light again.
Any idea what is going on? Any help would be greatly appreciated.
Thanx
Dear David w Richardson
The over crank alarm basically means that the unit is trying to crank (prevent some significant damage to your machine) and has a good crank signal from the ignition coil. The over crank problem is mostly related to fuel or maintenance. Generac generators need proper natural gas or propane fuel supply to run. If your generator is suffering from the improper gas supply, undersized gas line, or inappropriate fuel pressure, you are likely to experience this error code. For propane generators, you need to make sure that the tank is at least above 20% of its total capacity.
If everything mentioned above and the fuel system is correct, then you need to check the spark plugs or valve lash settings.
If you can’t handle all these issues by yourself, you may need professional help. We suggest that you only call professionals from Generac. You can locate one for yourself from here: https://www.generac.com/industrial/find-service.
Thanks
My 2kva gen has been running for over an hour then suddenly stops i check the oil level with a long stick of broom i still see there is still oil..i try to start it but it doesnt start i try again then i hear a loud bang around the exhaust side
Please what are the possible causes
Dear Dozie
The best way to find out what’s wrong with your generator is to run a complete diagnosis of your machine. You can use the above checklist as a reference.
To be precise in your case, we think that your generator has a spark plug issue. The “loud bang” can also be a result of a malfunctioning part. We recommend that you check the plug first and then go for any other solutions.
Thanks
Hi there, I have a problem with my generator it is running hard than expected which causes the generator to overheat within 10min and shut its self down and I have to wait approximately an hour for it to cool down, how can I fix the problem please.
Dear Marvin
A generator runs hard due to the following reasons
• Overloading
• Blockage in fuel pipes or clogged fuel pump
• Faulty carburetor
• Engine fault
• Choke problems
• Blockage in air filters or exhaust-system
Since your generator is running for 10 minutes and then shutting down, your problems seem to be overloading. Try taking off some load from your generator and running it.
Thanks
Hello I just replaced my TG950 generator caburator with a new one due to high fuel consumption,after fixing the new caburator I tried starting it, failed to come up until I spray some fuel directly into the carburetor then it started to work properly, the second day same issue I needed to spray fuel directly into the caburator again to get it working. Any solution to this?
Dear Olalekan Ramon
As you said that you recently brought a new carburetor, we believe that it is working fine. When you have to spray gas directly into the carburetor, it is due to a restricted or improper fuel supply. The best way to check this is to check fuel pipes, fuel pumps, or any valves that come in the way of fuel supply. You can unhook the fuel pipe entering the carburetor and look at the flow speed. If the fuel is coming out fine, then there is a high chance that your new carburetor has some issue in it.
Thanks
Has been running for 72 hr except when refilling fuel and checking oil levels all of a sudden stopped will crank and run only on half choke but not when you try to hook up power cord. Now can’t get it to crank. Suggestions
Dear William
When your generator runs for a long time continuously, there is a possibility that it can start troubling you. The best way to ensure that something like this does not happen with you is to give your generator a break while running. An hour or 2 of rest will be enough after running for 6-8 hours.
In your case, it is possible that the spark plug or low oil sensor of your generator is not working. Try replacing the spark plug and starting your generator. If your generator is stopping after plugging in the power cord, it is also possible that there is some issue with the electrical components of your generator. We suggest that you run a complete diagnosis of your unit. You can use the above points as a checklist.
Thanks
have a predator 7000 it starts when on choke but when I switch it run it cuts off, can anyone guide me in the right direction?
Hi Lee
A choke on the engine is used to enhance the fuel-air mixture and reduce the air intake in the carburetor. The choke provides more fuel to the engine so that it can be started quickly in colder temperatures or when the engine is making problems.
In your case, it looks like you have a vacuum leak and the engine gets more air than it needs to run. It will stop your engine when you turn off the choke. You need to check the air leak on the carburetor. If it is just the leak, you can fix it with epoxy. Make sure you give epoxy 24 hours to dry.
The second solution would be to get your carburetor serviced and get gaskets and diaphragm checked as well. You have to trace the leak, and your problem will be sorted.
Thanks
I have a generator that is fuel with propane. It will crank run a few seconds then shut off. Do y’all have any idea what is wrong. What to check!
You need to check your generator for any possible errors. You may be facing the “few seconds problem” due to several reasons. It can be extra load, spark plug, fuel pump, oil level, or any of the above mentioned 14 issues.
We suggest you start from the 1st issue in our list and then address your problem according to the solution mentioned.
Thanks
I have a Firman rogged generator. It starts normally and works fine but shuts down ; it could be after 30mins, 2hrs, 3hrs or 5hrs.
I have grounded the valves, cleaned the fuel tank and put new fuel, serviced the carburettor, changed the oil alert switch, put a new plug, and replaced the engine oil.
Still, the generator shut down after few minutes /hours.
Please what is the problem.
Dear Tope
Your problem can happen due to overloading, electrical problems (seem most likely, maybe some component is getting overheated), or a clogged air filter.
If the problem persists, you may need to call a certified generator mechanic.
Thanks
I have a brand new Generac Cosense GP6500. During a power outage I filled it with gas and oil and started it. I plugged in a refrigerator and freezer along with a power strip with floor lamp and small fan and two charging plugs for iPhones. The unit ran all night about 6-8 hrs.And shut off during the night when it ran out of gas. The next morning I refilled the unit and started the unit. It ran for about an hour then shut off. I checked the usual things. Nothing was amiss. Subsequent starts the unit shut down. Since the unit is brand new and it wasn’t over loaded. What could be causing this problem?
Dear Edward
As you say that you have a brand new generator, it is covered with a 1-year limited warranty. Contact the customer support service of Generac, and they will solve the problem for you.
We suggest that you don’t alter anything in your generator, resulting in the warranty getting void.
Thanks
I have a 4800 Mitsubishi generator it runs for 10 seconds and shuts off I unhook the oil safety switch and still shut off I put a new carburetor on it and it still runs 10 seconds and shuts off the exhaust is Good everything’s coming out strong and I also put brand new gas in it so I am confused of what is wrong can you help me PLEASE
John again .. Ps .. this is without a load on it can keep it running long enough to use it and for the 10 seconds on low idle or high idle still runs 10 the gas line is clear to the carb I used it to drain the tank so I I am very confused at what it could be anybody is welcome to help me out here
Dear John
We understand that you are in a tough situation. Generators can be a bit nasty at times. While everything may seem fine, little things can force them to go down.
From your situation, it looks like there is some sensor-related or electrical problem with your generator. The best way to diagnose the problem is to take it to a professional mechanic.
Thanks
Ok .. thank you for getting back to me and I will look into The sensors the funny thing is we had that big storm recently I fix three generators for my neighbors oil sensor switch and so on all day they worked fine except mine I’m puzzled but I guess I’ll look into those sensors and I’ll let you know how I made out so thank you so much for getting back to me
Great information. However, I have a Firman 3650 only 14 days old. Assembled it, started it, it started on second pull, and ran fine for an hour. Did the same thing a week later. 7 days after that, I started it again. No problem, but after about 20 seconds started “surging”. I closed the choke to about half, it stopped surging momentarily, then started again, I closed it a bit more, it cut out altogether. I restarted several times, mostly it would start for 1-2 seconds then cut out immediately. I added oil, same thing. I did have the freezer plugged in to give it a load, has one 20 amp duplex receptacle, and two 30 amp for RV. It was plugged into one of the 20 amp receptacle plugs. Certainly it is under warranty, but I can avoid a lot of hassle if I can do something myself. Thanks
Your generator is probably surging due to old fuel being used in it. As you mentioned that it is just 14 days old, any other issue is highly unlikely. Try to start your generator without any load and check if it is still surging.
If things don’t get fine after using fresh gas, contact the Firman’s customer support service.
My Generator was working fine, then suddenly it made a loud strange clinching sound, and thenrich stopped. It became hard to pull
The recoil mechanism can go bad due to the following reasons.
Hydro lock – Oil, gas, or water can get into the pistons. You can deal with it by removing the spark plug, pulling the recoil cord speedily to clean the pistons.
Recoils Start Assembly – You will have to reassemble the recoil start or replace it.
Flywheel Problems – Get it repaired or buy a new one.
Piston Seized – Get help from professionals.
You can try the first 3 solutions. If nothing happens, it is time to call a certified generator mechanic.
I have a duramax Xp10000e generator it starts easily and runs fo 3 seconds than shuts down I changed the fuel in it also changed the carburetor the oil is full and fresh The spark plug is new I can’t get it to stay running I have by chance had it start and run on low rpm as soon as the rpm rise either by auto or I accelerate it it shuts down it will start up again without hesitation and run for 2 or 3 seconds and shuts down again any suggestions would be appreciated it’s driving me crazy
If your generator is under warranty, we suggest that you call the DuroMax customer support service.
If the shutting down problem is due to high RPM and not over speeding, then it is most probably a grounding fault. If the generator is actually over speeding, then there is some issue with the governor. Such issues can also come due to a sensor problem. Maybe some part is not working properly, and it is forcing your generator to shut down.
Thank you very much for all the explanation, but what of if the Genny is Diesel generator (mikano)?
Diesel generator maintenance is a bit different from a portable gasoline generator. Diesel generators are mostly standby generators. It is best to call the technicians from Mikano
My gen will run in 20 to 30 mins, after then it will off with a loud noise pls can you tell me what to do ?
If your generator is running fine for 20-30 minutes, then it doesn’t have any issue with the starting mechanism. The loud bang is probably due to some malfunctioning part in the generator. It gets heated up and then makes a noise and forces the generator to shut down. We recommend that you follow the above checklist and check for any problems. If you are unable to solve the problem, call a professional to sort the issue out for you.
Hi, and thank you for your info and time.
I have a Onan 5500. code 36
Starts but dies as the choke opens. i can hold choke slightly closed and keeps it running.
I have gone through all the regular things, (Im a auto tech) fuel, spark, oil,
Changed fuel pump last year,
this is a free standing unit with its own fuel supply and batt.
I have been through the carb countless times, all clean, fuel cut solenoid good, cant find any vacuum leaks any where.
Will put out A/C voltage.
Best I got is that its lean, and I cant find why.
Thanks for your time
Well, everything seems to be all right with your generator. According to my knowledge and thinking, the fuel pump may be supplying more fuel to the engine than needed. Or, your generator is being overloaded. Sometimes the most basic things are neglected by us, and we look for bigger problems.
I have a K&S 10000e it was running fine for a few hours then suddenly stopped. It will start and runs showing power and running smoothly it then auto switches into the house circuit. At the point the load kicks in the generator makes a strange noise, sparks underneath the engine and stops. Oil level is fine, filter clean and fuel is fresh. It was ok with the load before but we did try turning everything off – any suggestions ?
It looks like the converting mechanism has some fault in it. You must check the transfer switch connected with your generator. If the load is according to the starting capacity, and everything else is fine, this issue usually happens due to a faulty transfer switch.
I have a predator 2000 watt generator started after 2 pull before I transported it with the fuel valve open and fuel in it. Now it won’t fire at all. Sometimes when I pull start it the overload ligh flashes for a second
First of all, never move or store a generator with fuel in it. You must follow all the safety precautions while working with a portable generator. You need to check all the basic things of your generator. The issue can be due to a faulty spark plug, old oil, stale gas, or any of the issues listed above in the article. It is possible that your generator just needs a detailed service with a carburetor cleaning.
I have a brand new generac pull the rope it fires up bucks and spits gas out carb an dies wont run more then 10 t0 15 seconds any thoughts? Has a hundred hours on it
Your generator needs a carburetor cleaning. While you are cleaning the carburetor, check the spark plug and the other 13 things mentioned above.
Please I have fireman Eco1990S. When I power the generator my fan speed increase with time not immediately when I power the generator. What is responsible? Is the capacitor okay? It’s a new generator. The generator will start low and later pickup
The fan speed and power output issues can happen due to sensor and capacitors installed in the generator. As you said, that you recently bought your generator, we suggest you claim the repair under warranty. It is better to get professional help than do something on your own. The warranty agreement will cover all the repair costs.
I have a firman 3550 watt continous. It has half a tank fuel, when tank is completely full it runs no problem. Hits half tank runs for 2-5 mins and shuts down. But while running surges in rpms. I removed air filter an it helped at first. But now it just automatically shuts down after surge running for 5 mins. Any thoughts??
The problem appears to be with the fuel pump or fuel sensor in your generator. Since your generator runs well when the tank is full, it is possible that it gets overheated till it consumes half the oil in the tank. It can happen due to multiple factors. The best way to go about this problem is to get your generator checked by a professional.
Hello, please urgent need. My Perkins generator suddenly started shutting itself down with generator under frequency and under voltage error after running for like 2-3mins or 10 mins sometimes and when not powered on. Please what can be done.
Frequency and engine speed drop due to overly sized loads. For example, if you have a 10KW generator and you are applying a 12kW load on it, it will not be able to power it. The engine fails to combust enough fuel, the frequency, and the engine speed drops, and as a result, the generator shuts down. Make sure the load you are applying on the generator is less than its maximum power output.
My generator switch off after like 45minutes, and it has refused to come on since then, I’ve poured more oil and there’s fuel and I just fixed the carburetor last week, what should I do??
It can happen due to various reasons. We suggest you make a checklist of all the above points and diagnose the problem.
Hi am Luiz my water pump generator 5.5 hp when I started it went off after 3 minutes, what might be a problem.
You need to check all the 14 points mentioned above and then confirm what’s wrong with the unit. Once the issue has been pinpointed, only then you can decide how to deal with it.
Have Onan
4000wt.cummings starts runs a few sec. Shuts off.
Please make a checklist of all the points given above and then locate the issue.
Have a Briggs and Stratton Inverted portable generator. Runs well without a load. Unit is used to power a Dremel tool. Works well for ~ 1 hour than it shuts down with the “Overload” indicator light being illuminated. Load on this unit is minimal and the oil level is normal. Unit has less than 30 hours. Any idea what is causing the unit to shut-down?
If the load is below the power output of the unit and the overload indicator light comes on, then it can happen due to a sensor problem. It can also cause the unit to stop running. Get the overload sensor checked. Since it comes on after 1-hour running, the unit may be getting overheated, and the light is coming on as a consequence of sensor malfunction due to heat.
I have a diesel generator GT 6500 LDE GT power silence. I starts up the generator and she runs the light for 2 hours and then the lights will shut off but the generator is still running. I then can go out shut off the generator and start her up again and she’ll run the lights for 2 hours again and then lights go off but generator still runs. This just repeats. Anyone know the reason why this may be happening?
Referring to my last comment, when I shut down the generator I have to leave it shut off for an hour or so before I can start her again to run the lights and then which she’ll run them for another 2 hours.
Some component in your generator is getting heated up which forces the power output to reduce. When you turn off the generator and give it some rest, the component or sensor cools down. When you restart the generator after an hour or so, the generator again starts to operate normally. There can be some issue with your light fixtures as well. Before going for any repairs, check your generator with other appliances.
If the same thing happens, there is probably something wrong with your generator.
We suggest you consult a professional generator mechanic for this purpose. Or, if your generator is in warranty, contact the customer service of your manufacturer.
my fuel generator i have been using to power my water pump suddenly stated going off whenever i want to pump water with it. what could be the problem/
Sudden shutdown problems can happen due to many reasons. It could be one of the reasons explained above. The best way to diagnose this problem is to make a checklist of all the issues stated above and then check your generator against the checklist. In this way, you will know what’s wrong with the machine, and it will be easier to sort it out.