Lawn Mower Turns Off After A Few SecondsNO shutoff valve? Pinch the gas line with Vise Grips. The switch connections are not well protected from the elements, and prone to dust, corrosion, etc. In this article, I give 5 solutions for this a common problem. Cub cadet runs for 5 minutes and dies. 12 Reasons a Lawn Mower Stalls and Shuts Off Old Gasoline. 14K Share Save 482K views 4 years ago #stevessmallenginesaloon #howitworks #engine If your lawnmower start and runs for a couple of minutes then stops, it could be a venting issue! I show you a. Lawn mower starts then stalls. The PTO works off of a 12-volt system. Find Solutions Toro Lawn mower starts then stalls 01 - Toro Lawn Mower Carburetor The carburetor might be clogged. That is not the issue with mine. Questions the Experts can answer 1. Assuming that the Overload is really looking for low-voltage somewhere, you might have a bad (high-resistance) electrical connection "under the hood". A clogged carburetor is most commonly caused by leaving fuel in the engine for a long period of time. 12 Reasons a Lawn Mower Stalls and Shuts Off Old Gasoline. How To Fix a Lawn Mower That Quits, Dies or Stalls After 2 Minutes. mower keeps switching off after 3 seconds,">My Greenworks 40V mower keeps switching off after 3 seconds,. Figured a fuel issue so I pulled the carburetor, disassembled it, carefully cleaned all the jets/orifices with Gumout, confirmed float is able to move fine, put it back together - same thing. I pulled it off, straightened and replace it. Ego mower shuts off after a few seconds I was mowing today and about half hour into it, the mower just shut off and the light blinked back and forth between green and yellow. A faulty carburetor can also cause your lawn mower to stop. com/_ylt=AwrNP31LzGdkHoMSKwhXNyoA;_ylu=Y29sbwNiZjEEcG9zAzIEdnRpZAMEc2VjA3Ny/RV=2/RE=1684552908/RO=10/RU=https%3a%2f%2fpoweredoutdoors. Rep: 13 2 1 Posted: Jul 29, 2017 Options My Toro self propelled lawn mower starts right up and then dies. Build Up of Clippings & Debris: Clean underside of your lawn mower deck as noted above. Thought I might have missed something so repeated the above process; no dice. Then I took off the carb and cleaned it with carb cleaner and blew it all out with the compressor. It might produce the initial spark, but the spark won't be enough to keep the engine running if the plug is. A dirty spark plug is misfiring and needs to be replaced. If your lawn more typically starts after it has been stored a while but then stalls after a few minutes you may find this helpful. Cordless lawn mower briefly starts then cuts out. Find Solutions Toro Lawn mower starts then stalls 01 - Toro Lawn Mower Carburetor The carburetor might be clogged. 331 subscribers Subscribe 58K views 1 year ago Does your Ryobi Battery 40 volt lawn mower keep shutting off? Check these three things to fix the problem for only $8! Replace the two safety. It started today, ran for 60 seconds and died. Dirty Spark Plug: Clean or replace. 2 wires plug into the bottom of the A. Machinc is online now Questions the Experts can answer 1. John Deere Lawn Mower Won’t Stay Running: …. Gasoline can begin to break down as quickly as 30 days after. Check for dust, large debris, or oil buildup, and if any of them are present, use a cotton swab. Below are some of the most common reasons why your lawn mower stops just some minutes after starting. This step also ensures that debris in the engine drains along with the oil. 01 - Lawn Mower Carburetor. It cuts out anywhere from 2-10 seconds. The spark plug works with the ignition coil to create a timed spark in the cylinder, causing combustion. What Causes A Lawnmower To Randomly Cut Out? Quick fix: To fix your lawn mower, investigate and identify the root of the issue. Does your Ryobi Battery 40 volt lawn mower keep shutting off? Check these three things to fix the problem for only $8! Replace the two. SOLVED: My Toro self propelled lawn mower starts. Might I have ruined the battery? My name's John too!. Below is a chart of common Engine problems and some easy troubleshooting to fix the problem you may be experiencing. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. Any advice or suggestions would be greatly appreciated I believe it’s model 2045. A lawn mower will keep shutting off and stall when it isn’t getting fuel due to old fuel, an insufficient fuel level, a clogged fuel line, a plugged fuel filter, or a bad gas cap. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. 03 Find Solutions My Lawn Mower Starts then Stops 01 - Lawn Mower Carburetor The carburetor might be clogged. Step 1 Park the lawn mower on level ground and set the parking brake. Tilt your lawnmower up and put a heavy object on the handle. Cutting Tall Grass: Raise the cutting height on your lawn mower. If your lawn more typically starts after it has been stored a while but then stalls after a few minutes you may find this helpful. One culprit is the Anti Backfire Solenoid ( A. Hi my Greenworks 40V mower keeps switching off after 3 seconds, I thought it was a bad battery, Amazon sent another one. A faulty or dirty spark plug could be the reason your lawn mower won’t stay running. This can be due to running old fuel through your mower. lawn mower that starts but stalls after a few minutes">Fix lawn mower that starts but stalls after a few minutes. I cleaned the air filter, topped off gas, and checked oil. 14K Share Save 482K views 4 years ago #stevessmallenginesaloon #howitworks #engine If your lawnmower start and runs for a couple of minutes then stops, it could be a venting issue! I show you a. Typically, if this is the case, you're best to let a professional take a look and clean it out as this can get a bit more complicated. Below are some of the most common reasons why your lawn mower stops just some minutes after starting. When the lawn mower is running and the switch on the. The PTO on my JD Ztrak 830A has just started shutting down while I'm mowing. Sep 9, 2016 / Engine stalls when blades engaged. If any one is missing or inadequate the engine won't work. Remove the fuel if you will not use the mower for a continuous 30 days. Two days ago hit a root and bent blade. Other possible causes include: Loose, Dirty or Disconnected Spark Plug in Your Lawn. Why Is My Lawn Mower Starting & Then Going off in a Couple Seconds? Check the Fuel Line. 14K Share Save 482K views 4 years ago #stevessmallenginesaloon #howitworks #engine If your lawnmower start and runs for a couple of minutes then stops, it could be a venting issue! I show you a. A faulty or dirty spark plug could be the reason your lawn mower won’t stay running. I tried different batteries, everything looks in good shape. If your lawnmower stops after a few seconds, you have already checked its gas and oil levels and then tried pumping the primer but if it dies after running for a few minutes. a lawn mower that runs for a while then dies">How to fix a lawn mower that runs for a while then dies. The best way to find the exact cause of a "no-start" issue is to ensure that the engine has the four necessary things for it to run: fuel, compression, spark and air. Getty Frustration sets in when mowing with a machine that fails to run reliably. Once it stopped blinking I could start it again and it'd run about 5 seconds, shut off, and blink again. Dull, Bent or Loose Mower Blade: Sharpen or replace. SOLVED! This is Why Your Lawn Mower Keeps Shutting Off. SOLVED! This is Why Your Lawn Mower Keeps Shutting Off & Stalls. 1 The lawn mower only runs on choke. If your lawn mower starts then stops, the problem might be the. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. The bowl had a small pieces of a gel substance in it. If any one is missing or inadequate the. I suggest turning the gas off a few seconds before stopping the engine and see what happens. Take the lawnmower to a certified repair center for a thorough clean and inspection. Since this prevents the engine from working correctly, empty the gas tank, fuel line,. Apr 28, 2020 / Cub Cadet PTO keeps shutting off. Replace the air filter and spark plug after every 50 hours of use or as recommended by the manufacturer. Chosen Solution. Lawn mower runs for a few seconds then stops. Most John Deere lawn mowers are equipped with an electric PTO (Power Take Off). » Small Engine Troubleshooting. I performed the following checks: - check for spark: ok - check oil level: ok - check fuel level: full - checked the kill switch/brake mechanism: not familiar with this but all seemed well After fiddling around I managed to get it going another 10+ minutes of grass cutting and the same thing happened again. Dull, Bent or Loose Mower Blade: Sharpen or replace. What Causes A Lawnmower To Randomly Cut Out? Quick fix: To fix your lawn mower, investigate and identify the root of the issue. Take your volt meter and clip the positive lead (+) of the meter to the positive (+) battery post. Reasons a lawn mower keeps shutting off and stalls: Old or bad fuel Insufficient fuel level Incorrect choke setting Plugged air filter Bad spark plug Clogged fuel line Plugged fuel filter Dirty carburetor Bad fuel cap Plugged mower deck Thick, wet, or tall grass Bad safety switch This post may include affiliate links. The best way to find the exact cause of a "no-start" issue is to ensure that the engine has the four necessary things for it to run: fuel, compression, spark and air. Other possible causes include: Stale/Dirty Gas Faulty Choke Gas Filter Blocked Gas Tank Blocked Gas Line Blocked Cleaning the carburetor and draining the gas tank will fix the problem; it’s all covered. If your lawn mower starts, runs briefly, then dies these are the four most common reasons that's happening: Dirty carburetor / clogged carburetor bowl Old gasoline that has gone bad Dirty or defective spark plugs Too much oil in your resevoir. I checked to see that the bolts were right. A lawn mower will keep shutting off and stall when it isn’t getting fuel due to old fuel, an insufficient fuel level, a clogged fuel line, a plugged fuel filter, or a bad gas cap. Does your Ryobi Battery 40 volt lawn mower keep shutting off? Check these three things to fix the problem for only $8! Replace the two safety switches and th. Be sure to bring the bar down all the way to the handle before pulling. Battery charger shows full charge. PTO shutting down while mowing. Cutting Tall Grass: Raise the cutting height on your lawn mower. The reason your mower shuts off when you start to engage the mower is that a wire under the mower some where has had the insulation rubbed off and either the lever or the linkage contacts the bare wire and grounds out the engine. It might produce the initial spark, but the spark. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. I have a Ryobi cordless (battery operated) mower. Why does my lawn mower turn off after a few seconds? Some of the most common reasons your lawn mower might start briefly then die are: a dirty or clogged carburetor, old gasoline that has gone bad, dirty or defective spark plugs. Gasoline can go “stale” and start to “varnish” or sour within just two or three weeks of being left idle, so it’s a good idea to drain it off whenever you plan to stop using your mower for a while. Get an inline spark tester install that and go mow. Walt Conner C cuckoochris Member Joined Jun 1, 2015 Threads 5. Taking A Long Time To Start. It screws up into the float bowl and cuts the flow of fuel ( stalling ) to the carburetor float bowl. A typical cause for this is that the engine flywheel brake (the bar you hold down on the handle that stops the engine when released) is engaged. 8 > 06-14-2010, 08:32 PM bjornb17 432 posts, read 3,535,546 times Reputation: 415 Advertisements Recently while cutting my grass my lawn mower began to sputter and shut off. How to repair Ryobi RY40108 cordless mower?. 6 Reasons Why Lawn Mower Starts Then Stops. Then will not start right away. A shutoff valve is good insurance anyway. 1 Lawn mower stops running when hot 1. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. I changed the air filter and put a new plug in it, and it still has the same problem. I performed the following checks: - check for spark: ok - check oil level: ok - check fuel level: full - checked the kill switch/brake mechanism: not familiar with this but all seemed well After fiddling around I managed to get it going another 10+ minutes of grass cutting and the same thing happened again. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. Repeat steps 5-7 as needed until the flywheel spins freely. Whenever i try to restart if (after priming), it will chug for a couple seconds and then shut back off. Unplug the connector to the solenoid and proceeded to turn the solenoid counter clockwise. 2 How to prevent carburetor blockages. My engine starts up and runs for a few seconds and then dies. Ryobi 40v mower cuts out after a few seconds Starts up just fine, runs fine until I move forward. I've clean my carburetor and took the float bowl off and cleaned it out. Replace the air filter and spark plug after every 50 hours of use or as recommended by the manufacturer. My 40V/146W powered Greenworks blower runs for 5-30 seconds then turns off. Did a quick wipe off to be sure, but they're in good shape and clean. If there is, scrape that grass off with your hands or a trowel or something. If your lawnmower starts up but then dies in the middle of mowing your lawn, you could have a bad spark plug. A clogged carburetor is most commonly caused by leaving fuel in the engine for a long period of time. How to fix Ryobi RY40108 cordless mower not starting? 4. 22,702. 5 Why does my lawn mower only run for a few seconds and then dies? 6 Conclusion. If you start your mower and it dies after a few seconds, try out the following tricks. If the air filter is clogged, the engine will not be able to get enough air and will shut down after a few seconds. What Causes A Lawnmower To Randomly Cut Out? Quick fix: To fix your lawn mower, investigate and identify the root of the issue. A faulty or dirty spark plug could be the reason your lawn mower won’t stay running. Here are the steps to take to replace the oil in your lawnmower. If your lawn more typically starts after it has been stored a while but then stalls after a few minutes you may find this helpful. Here are the steps to take to replace the oil in your lawnmower. mid-80's lately, and if I shut down the engine, then re-start, it will work again. My lawn mower will start for a few seconds then dies. Dirty or defective spark plugs. 01 - Lawn Mower Carburetor. Lawn Mower Won’t Stay Running. - Answered by a verified Technician. Directly behind the engine is the battery. Then slather the spades with dielectric grease. A faulty or dirty spark plug could be the reason your lawn mower won't stay running. But starts and dies after a few seconds even with 24 hour charge and 66 degree outdoor. Mower rand for 60 seconds and stop. 14K Share Save 482K views 4 years ago #stevessmallenginesaloon #howitworks #engine If your lawnmower start and runs for a couple of minutes then stops, it could be a. When you take the fuel bowl off, notice about a half inch above the bottom of the pipe leading down into the bowl, there is a very small hole located in the. 2 wires plug into the bottom of the A. Allow the oil to go to other parts of the engine; leave it for about an hour. Clean the spades with the wire brush. If your lawn mower starts, runs briefly, then dies these are the four most common reasons that’s happening: Dirty carburetor / clogged carburetor bowl. lawn mower will start for a few seconds then dies. A Troy-Bilt lawn mower may die because there is a fuel or air restriction that prevents your mower from running. ) located on the bottom of the carburetor. If you have last season's gas in your mower, drain your fuel tank and fill with fresh gas. This can also happen if your mower blade is dragging in grass or clogged with grass clippings. My Greenworks 40V mower keeps switching off after 3 seconds, I thought it was a bad battery, Amazon sent another one. Jul 8, 2018 / Starts, runs for a while, then dies. After twenty or more rotations, I figured it does not screw off and must have a compression o-ring that slides over. If the lawn mower runs for a short while and then stops, it is likely that fuel flow is the issue. Check for a Clogged Carburetor. If your lawn mower starts, runs briefly, then dies these are the four most common reasons that’s happening: Dirty carburetor / clogged carburetor bowl. My DeWalt Electric Lawnmower runs 60 seconds on freshly. Figured a fuel issue so I pulled the carburetor, disassembled it, carefully cleaned all the jets/orifices with Gumout, confirmed float is able to move fine, put it back together - same thing. 2 Checking the spark plug 3 Checking the air filter 4 How to start a lawn mower with a choke 4. Video of the Day Step 2 Open the hood of the lawn mower. Turn the mower on its side and look underneath to see if there is a thick mushy layer of grass clogging the deck. Many times the result of a lawn mower running sluggish and stalling is due to a lack of a sufficient fuel supply. Dirt can enter the fuel line through the gas tank or from the can. The most common reason for a lawnmower to fail to keep running is due to a clogged air filter. Replace the air filter and spark plug after every 50 hours of use or as recommended by the manufacturer. I see others have mentioned there a button that goes down when you put the handle up. What Causes A Lawnmower To Randomly Cut Out? Quick fix: To fix your lawn mower, investigate and identify the root of the issue. Check the Carburetor If your lawn mower starts then stops, the problem might be the carburetor. 1 How to clean lawn mower carburetor 1. This sticky fuel can clog up the carburetor and cause the engine to stall. One culprit is the Anti Backfire Solenoid ( A. After cutting out it won't start straight away (but it will 'turn over' fine), have to leave it 30 seconds or more and then start on choke. Step 1: Warm the Oil Startup the lawnmower to warm up the oil allowing for easier drainage. Lawn Mower Starts Then Stalls. 1 Lawn mower stops running when hot 1. The problem is in the carburator. If your lawnmower start and runs for a couple of minutes then stops, it could be a venting issue! I show you a quick, easy, fast way to check it. com">Honda Lawnmower starting then cutting out!. The PTO is the mechanism that turns on the blades located under the mower deck. 14K Share Save 482K views 4 years ago #stevessmallenginesaloon #howitworks #engine If your lawnmower start and runs for a couple of minutes then stops, it could be a. If you notice your lawnmower overheating and the suddenly losing power, one of the possible causes is that the premix has gone bad. com ">Cub cadet runs for 5 minutes and dies. How to troubleshoot Ryobi RY40108 cordless mower? 2. This chart is to be used as a guideline for troubleshooting engine problems. Lawn Mower Forum">Starts, runs for a while, then dies. To check if the filter is dirty and causing the motor to overheat, take it out of its compartment and remove it from the unit. Home and Garden // Home Improvement Why Is My Lawn Mower Starting & Then Going off in a Couple Seconds? By Robert Korpella Updated Jan 22, 2014 5:31 p. If the problem still isn’t solved. Check the Carburetor If your lawn mower starts then stops, the problem might be the carburetor. How to troubleshoot Ryobi RY40108 cordless mower? 2. If it fires up & runs till it burns off the spray then you have a fuel supply problem. How to fix a lawn mower that runs for a while then dies. Hi my Greenworks 40V mower keeps switching off after 3 seconds, I thought it was a bad battery, Amazon sent another one. One culprit is the Anti Backfire Solenoid ( A. Turn the mower on and let it run for one to two minutes in order to stir up the 'gunk' inside the carburetor. You need: a small wire brush dielectric grease Remove the connections of the deadman safety switch. A typical cause for this is that the engine flywheel brake (the bar you hold down on the handle that stops the engine when released) is engaged. Clean or replace a dirty air filter. Step 1 Park the lawn mower on level ground and set the parking brake. A dirty carburetor is the most common cause of a lawn mower that starts and then dies. 14K Share Save 482K views 4 years ago #stevessmallenginesaloon #howitworks #engine If your lawnmower start and runs for a couple of minutes then stops, it could be a venting issue! I show you a. The carburetor might be clogged. It might produce the initial spark, but the spark won’t be enough to keep the engine running if the plug is. When it stops take the fuel cap off and see if it runs longer. Check to see if there is a loose spark plug and inspect the connection for the spark plug to see if it has become disconnected. Small Engine Troubleshooting Your Engine just started acting up and you don’t know what to do. #1 Good morning! I have a problem with the PTO shutting off within a few seconds. Reasons a lawn mower keeps shutting off and stalls: Old or bad fuel Insufficient fuel level Incorrect choke setting Plugged air filter Bad spark plug Clogged fuel line Plugged fuel filter Dirty carburetor Bad fuel cap Plugged mower deck Thick, wet, or tall grass Bad safety switch This post may include affiliate links. Lawn mower sputters and turns off within a few seconds (grass, …. It seems to stay on if I don’t drive, however if I drive it shuts off. My Lawn Mower Starts Then Dies: What's Wrong?. Here's why this happens and what you can do: Dirty Air Filter on Your Lawn Mower: Clean or replace. Many times the result of a lawn mower running sluggish and stalling is due to a lack of a sufficient fuel supply. The best way to find the exact cause of a "no-start" issue is to ensure that the engine has the four necessary things for it to run: fuel, compression, spark and air. #1 Good morning! I have a problem with the PTO shutting off within a few seconds. 12 Reasons a Lawn Mower Stalls and Shuts Off Old Gasoline. 14K Share Save 482K views 4 years ago #stevessmallenginesaloon #howitworks #engine If your lawnmower start and runs for a couple of minutes then stops, it could be a venting issue! I show you a. Brand new DeWalt electric lawn mower. If your lawnmower start and runs for a couple of minutes then stops, it could be a venting issue! I show you a quick, easy, fast way to check it. Got a dozen or so 2000 series garden tractors in the service run and the MIR switch on all of them has given me endless grief. Let the mower sit for five to ten minutes before starting it up again. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier. It's a deadman switch, if it loses contact for even a second, the mower will die. IF this helps, add an inline shutoff valve and use it when the engine is shut off. When it stops give it a squirt of starter fluid or carb cleaner down the carb. to provide 12 VDC to activate the solenoid when the ignition is in the ON postion. Ryobi 40v mower cuts out after a few seconds Starts up just fine, runs fine until I move forward. It's a deadman switch, if it loses contact for even a second, the mower will die. Lawn Mower starts for two seconds then dies. Fortunately, there are many reasons that can cause your mower to die that are easily fixed and not costly. Gasoline can begin to break down as quickly as 30 days after. You need: a small wire brush. Check the Fuel Line; Old Gasoline; Dirty Gas Tank; Mower Tune-Up;. Briggs And Stratton Lawn Mower Starts Then Dies? (We Have A …. Old gas is known to gum up and corrode the fuel system. First guess would be the reverse switch has come loose & it is cutting out because the MIR cut out is being activated. This sticky fuel can clog up the carburetor and cause the engine. You will have to look under the mower and move the lever and. If your lawn more typically starts after it has been stored a while but then stalls after a few minutes you may find this helpful. This can be due to running old fuel through your mower. Lawn Mower Starts Then Dies – Solved! – Lawnmowerfixed. com%2flawn-mower-keeps-stalling%2f/RK=2/RS=ZdClG1OUnvEnBuIVFEy3LZKhCLY-" referrerpolicy="origin" target="_blank">See full list on poweredoutdoors. 01 - Lawn Mower Carburetor. Lawn Mower Starts Then Dies. It doesn't sound like the engine is missing. An insufficient engine oil level, blocked cooling fins, and a clogged mower deck can cause the mower to overheat and shut down. Step 1 Park the lawn mower on level ground and set the parking brake. 01 - Toro Lawn Mower Carburetor. What to do when Ryobi RY40108 cordless mower stops working? 5. Shut off the mower, and spray the carburetor again with the cleaner or solvent. Toro Lawn mower starts then stalls. Small Engine Troubleshooting Your Engine just started acting up and you don’t know what to do. You need to clean the carb thouroughly with spray carb & choke cleaner. If not look at what amount of fuel flows out of the hose. If any one is missing or inadequate the engine won't work. It cuts out anywhere from 2-10 seconds. It keeps…">I have a Ryobi cordless (battery operated) mower. Rep: 13 2 1 Posted: Jul 29, 2017 Options My Toro self propelled lawn mower starts right up and then dies. craftsman starts and runs fine, then dies?. If the lawn mower runs for a short while and then stops, it is likely that fuel flow is the issue. The best way to find the exact cause of a "no-start" issue is to ensure that the engine has the four necessary things for it to run: fuel, compression, spark and air. Gasoline can begin to break down as quickly as 30 days after. Step 2: Remove the Spark Plug Wire. Build Up of Clippings & Debris: Clean underside of your lawn mower deck as noted above. to Troubleshoot the PTO System on a John Deere. I've tried running it with the choke on a bit but that doesn't help, only leads to a backfire on the next attempt to start thanks to excess fuel. This sticky fuel can clog up the carburetor and prevent the engine from starting. Grass wasn't particularly heavy. Ego mower shuts off after a few seconds I was mowing today and about half hour into it, the mower just shut off and the light blinked back and forth between green and yellow. The most common issue when a lawnmower starts up and then stops a few seconds after is a carburetor issue. runs for 5-30 seconds then turns off. Since it runs, but then stops you can you can assume the plug is igniting the fuel. You may find that a gas refill or replacement solves the problem. If this happens, the lawn mower will need to sit idle for several hours to allow the fuel to drain out of the chamber. The switch connections are not well protected from the elements, and prone to dust, corrosion, etc. If your lawn more typically starts after it has been stored a while but then stalls after a few minutes you may find this helpful. It only runs for 1-2 seconds then dies. Change the oil after every 50 hours of use or as recommended by the manufacturer. Change the oil after every 50 hours of use or as recommended by the manufacturer. Old gasoline that has gone bad. Here's why this happens and what you can do: Dirty Air Filter on Your Lawn Mower: Clean or replace. Remove the fuel if you will not use the mower for a continuous 30 days. The best way to find the exact cause of a "no-start" issue is to ensure that the engine has the four necessary things for it to run: fuel, compression, spark and air. A faulty or dirty spark plug could be the reason your lawn mower won’t stay running. 12 Reasons a Lawn Mower Stalls and Shuts Off Old Gasoline. Trace the fuel delivery path to cure an engine that dies. Such as coming from the main discharge leads that the battery feeds. How full is the fuel tank when it first stops? A full fuel tank with a bad vent whether it is the cap or other vent will creat a vacuum in the tank faster than a half full tank. When it stops take the fuel cap off and see if it runs longer. What causes Ryobi RY40108 cordless mower to cut off after a few seconds? 3. The first time it happened, I had been mowing for about 1/2 hr and I saw no indicators on the status panel, it just shut off. You need to purchase a kit #631021B from a Tecumseh dealer. It can also stall when the engine isn’t getting air due to a plugged air filter or the wrong choke setting. What causes Ryobi RY40108 cordless mower to cut off after a few seconds? 3. Ego Lawn Mower Overload light and won’t start : r/lawnmowers">Ego Lawn Mower Overload light and won’t start : r/lawnmowers. Remove the connections of the deadman safety switch. A dirty carburetor is the most common cause of a lawn mower that starts and then dies.