Ryobi riding lawn mower keeps shutting off - Oct 18, 2023 · Modified: October 18, 2023 Written by: Emily Roberts Discover articles on why your Ryobi mower keeps shutting off and find solutions to help you keep your mower running smoothly. Explore expert tips and troubleshooting advice. Ryobi (Many of the links in this article redirect to a specific reviewed product.

 
Step 6. Stand up. The mower will turn off if the switch works properly. If the mower stays running, the switch no longer works properly. Advertisement. Riding lawn mowers have a safety switch located under the seat. This switch, commonly called a “kill switch” turns off the engine when the mower deck is engaged and the rider gets off the seat.. Openstax microbiology test bank

Ryobi battery-powered lawn mower stalls after a few minutes. I had no problem with the mower a week ago, but my dad tried to mow the front lawn and it was stopping every few minutes. The battery was fully charged. The mower itself is maybe a month old. There didn't seem to be any reason for it to stop, just that it did every 3-4 passes through ... A faulty power switch or a loose cable connection are some of the reasons electric lawnmowers may cut out. The thermal cut out can be caused by an overheating motor. If the motor overheats, it may not be able to keep up with the heat generated by the lawn mower. If you have an overheated motor, you will need to replace it with a new one.Air Filter. The most common cause of a mower failing to keep running is a clogged air filter. Take the cover off the air filter compartment and remove the filter to see if it is dirty, or clogged with oil and dust. If it is a foam rubber filter, wash it in warm soapy water, let it air dry, soak it with a teaspoon of motor oil and replace it.1. There are so many variables that can keep a small engine from running properly. 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. If any one is missing or inadequate the engine won't work. Since it runs, but then stops you can ...Jan 19, 2023 · Reason why riding lawn mower stopped running while mowing. Fuel could be stale. Engine could be flooded. Air filter could be clogged. Mower deck could be overheated. Whatever the case is, here are a few tips if you need help troubleshooting why your riding lawn mower stopped running while mowing: Check to see if there’s enough gas and oil in ... Technician: John Electrical. Here is a list of several things to try and get your mower working again. 1) The operator handle can be cycled from the closed stored position to upright operating position. 2) Try folding the handles down, then firmly fold open the handles to the operating position.The rear belt routing diagram for the Husqvarna RZ5424 Zero-Turn Riding Mower is available in the Customer Support section of the company website. Additionally, this mower features a decal by the rear belt assembly, accessible via a removab...Step 2: Attach the Switch to the Underside of the Seat Plate. Once I removed the pressure switch from under the seat I just attached this to the underside of the seat plate. I could have just clamped this in a closed position and left the switch loose but I wanted to attach this so it would stay out of the way.Faulty Carburetor. A faulty carburetor can be a common cause for a Ryobi lawn mower to stop unexpectedly. The carburetor is responsible for mixing the proper amount of air and fuel for combustion. When the carburetor becomes dirty, clogged, or damaged, it can disrupt the fuel-air ratio and lead to engine stalling or stopping.First, check the oil and make sure the gas is fresh. Check gas level. Put choke full on. Pull start engine. When running, move choke to half. After 30 seconds turn choke off. Help! Crazy Mower won't turn off, this guide will show you how to shut down your mower safely and also show you what the problem is.01 - Ryobi Lawn Mower PTO Clutch. The PTO (Power Take Off) clutch provides a means of manually disconnecting the engine from the blades. When the clutch solenoid is energized, the clutch engages the drive belt to drive the rotation of the lawn mower blades. If the PTO clutch is not getting power, if the clutch solenoid is defective, or if the ...I have a Ryobi RM300e riding electric mower. with a full charge ,key on, and break off the mower will only go about a foot then cut out. it also dose that when i engage the blades. Mechanic's Assistant: I understand that youre experiencing issues with your Ryobi RM300e riding electric mower, but dont worry, our Expert will be able to help you troubleshoot …Apr 20, 2023 · Table of Contents. Best Riding Mowers for 2023. Other units we evaluated. Riding mower FAQs. $3,799 at Home Depot. Best zero-turn riding lawn mower. Cub Cadet Ultima ZT1. $3,799 at Home Depot ...Step 2: Attach the Switch to the Underside of the Seat Plate. Once I removed the pressure switch from under the seat I just attached this to the underside of the seat plate. I could have just clamped this in a closed position and left the switch loose but I wanted to attach this so it would stay out of the way.Jul 10, 2021 · Jul 10, 2021 / Ryobi riding mower stalling? #2. Going backwards. For $ 3000 I would expect the quality for some thing I paid 3 weeks wages for,,,,, not much. My sister still has my fathers first petrol powered push mower. The unit owners next to her uses it to mow the common area for their block & 5 others. Jul 10, 2021 · Jul 10, 2021 / Ryobi riding mower stalling? #2. Going backwards. For $ 3000 I would expect the quality for some thing I paid 3 weeks wages for,,,,, not much. My sister still has my fathers first petrol powered push mower. The unit owners next to her uses it to mow the common area for their block & 5 others. Mar 16, 2023 · Our experts test the best battery-powered lawn mower in 2023 including push, riding, bagging, mulching, and self-propelled mowers! ... These mowers typically drop $100 off the price of a comparable self-propelled mower, and they cut just as well and with slightly higher runtime. ... Best Cordless Push Lawn Mower Ryobi 40V HP Brushless …by genegx 21" Ryobi self-powered mower keeps shutting off when mowing Got a 21" Ryobi self-powered mower, the Home Depot version RY401014US, worked for a month …A rechargeable Ryobi battery will last 2-3 years, depending on your charging habits. How Charging a Lithium-Ion Battery Works. To increase the longevity of your lithium-ion battery, it is best to do more shallow discharges and recharges rather than full ones less often because it places less stress on the battery.. Ideally, you should top your battery up …When it comes to lawn care, having the right equipment is essential. A zero turn mower is a great option for residential lawns, as it offers superior maneuverability and a smooth ride.Technician: John Electrical. Here is a list of several things to try and get your mower working again. 1) The operator handle can be cycled from the closed stored position to upright operating position. 2) Try folding the handles down, then firmly fold open the handles to the operating position.Jun 22, 2023 · First things, first. Don’t panic if your lawn mower won’t stop. There is a very quick and easy way to kill the engine, and then you can take the necessary steps to figure out why it won’t stop. Take a pair of insulated pliers and pull the boot off the spark plug. Your mower will instantly shut off. 718 95K views 2 years 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 switches and the...Ryobi 40V lawnmower won't run, stops, intermittent fix, problem solved. MIKE BOLLINGER. 28K views 1 year ago.Ryobi Riding Lawnmowers: Ryobi riding lawnmowers are battery-operated and often come with a runtime of approximately 2.5 hours or more (i.e. this depends on the model …I have a Ryobi RM300e riding electric mower. with a full charge ,key on, and break off the mower will only go about a foot then cut out. it also dose that when i engage the blades. Mechanic's Assistant: I understand that youre experiencing issues with your Ryobi RM300e riding electric mower, but dont worry, our Expert will be able to help you troubleshoot …Lawn mower battery keeps dying. ... Craftsman Riding Lawn Mower Disassembly. View Solution. 05:42. ... Shop by Popular Ryobi Lawn Mower Models.6 reasons not to buy. Several owners were disappointed with the Ryobi RY48110’s lack of suspension and noted that traveling on rough terrain can be very uncomfortable. One user complained that after a year and a half of use, the mower caught fire while mowing. A handful noted that the mower lacked traction because of it being 2 wheel drive.If the mower keeps shutting off when you cut thick areas of grass, make sure the mower height is not set too low. Many mowers have wheel levers at each of the mower's four wheels, or another way to adjust the mower height. Stop the mower engine, raise the height and resume mowing. If the mower quits again, raise the deck higher, to the highest ...Repeated Stop Start of the Lawn Mower. If the rectifier, motor, and thermal cut-off switch are all ok, then the cause of your electric mower cutting out could be down to repeated starting and stopping of the lawn mower. Every time you start your lawn mower, the motor requires a large current to get the motor spinning.A lawn mower may stop while mowing because it is not getting the correct air and fuel the engine requires to keep running. A dirty carburetor, plugged air filter, bad fuel or faulty fuel cap can all be causes of your lawn mower shutting off. I have helped many customers troubleshoot this issue over the years. A rechargeable Ryobi battery will last 2-3 years, depending on your charging habits. How Charging a Lithium-Ion Battery Works. To increase the longevity of your lithium-ion battery, it is best to do more shallow discharges and recharges rather than full ones less often because it places less stress on the battery.. Ideally, you should top your battery up …4. Low throttle. Ryobi lawn mower requires full throttle to produce enough energy to cut grass off. Low throttle can cause the engine to be a bit sluggish. Check the cables to ensure they are well connected to the carburetor. The lever may be set to full throttle, but the cables may not reach the carburetor end.The RYOBI 48-Volt 30 in. Riding Lawn Mower is clean, quiet, and unbelievably powerful. This fully electric mower has no gas and no fumes - just charge and go. It's powered by 50Ah lead-acid batteries and three high powered brushless motors to give you up to 1 acre or 1 hour of runtime on a single charge. It features two steel blades and durable 30 in. …Oct 23, 2023 · Take apart your lawnmower to expose the motor. Get the motor and wiring as dry as possible. Apply electric contact cleaner. If your motor wiring has lost insulation resistance, use a megohmmeter to test and reestablish the resistance of the wire windings around the motor shaft.RY401140US. Enter the 40V System with the RYOBI 40V HP Brushless 21" Self-Propelled Lawn Mower. With 40V HP Technology delivers more power than a 163cc gas mower, making this mower a true gas replacement. Dual active battery ports and two included 40V 6Ah lithium batteries give you up to 70 minutes of runtime for tackling up to 3/4 acre with ...If you have a big yard, your riding lawn mower is probably a gadget you can’t afford to have break down. During the summer, just a week without mowing can leave you with a lawn full of tall grass and weeds that not only look unsightly, but ...If you are having issues with your Ryobi mower randomly shutting off without warning, the number one place you want to look to resolve the issue is the handle of your mower. It seems to be the source of most problems. Commonly it occurs when the bolts holding the handles to the mower come loose and no … See moreIt keeps cutting itself off, after a few seconds of operation. this has been getting progressively worse since I got the mower 3 months ago. Today I am having trouble getting it to start at all. The battery is fully charged. RY40108. Contractor's Assistant: Do you have fuel in the tank? If so, is the shut-off valve open and the fuel clean?I show how to fix intermittent shutting off issue with Ryobi 40v cordless lawnmower. I just used a T30 torx bit and tightened both handle's at the base. The screws become loose …Ryobi mowers get bogged down easily with low cutting heights, imo. Mezzamillion • 2 yr. ago. I think all of these 40v mowers are defective, i went through that one and the 500$ one in 2 months, just spent 419 on a honda mower from home depot and its a beast, i hear they last a long time. s_0_s_z • 2 yr. ago.Jun 16, 2023 · The oil acts as the lubricant that keeps all internal engine parts operating smoothly. When it runs low, there is more friction when these parts are operating, which generates additional heat. Sometimes enough for your lawn mower to overheat and shut down. Solution: Check the oil level in your mower right away. Step 4- Test the lawn mower again: Check by letting go of the lever and if so, putting it back together to test whether the motor is turning off or not. Next, reinstall the engine shroud back on and tighten the screws securely. Let’s test it now, and if …Jan 29, 2023 · We have purchased a 21 inch lawn mower from Home Depot Sherbrooke, item number 046396036995 on june 19, 2022. It worked well until four days ago where the mover refused to start the blade. Light comes on, forward move gives little jerks but does not advance. We tried and controlled four different Ryobi batteries, they were all fully loaded. First things, first. Don’t panic if your lawn mower won’t stop. There is a very quick and easy way to kill the engine, and then you can take the necessary steps to figure out why it won’t stop. Take a pair of insulated pliers and pull the boot off the spark plug. Your mower will instantly shut off.Step 6. Stand up. The mower will turn off if the switch works properly. If the mower stays running, the switch no longer works properly. Advertisement. Riding lawn mowers have a safety switch located under the seat. This switch, commonly called a “kill switch” turns off the engine when the mower deck is engaged and the rider gets off the seat.Step 2: Attach the Switch to the Underside of the Seat Plate. Once I removed the pressure switch from under the seat I just attached this to the underside of the seat plate. I could have just clamped this in a closed position and left the switch loose but I wanted to attach this so it would stay out of the way.If your Husqvarna lawn mower fuel or air filtering systems are blocked, it could die while mowing. An obstructed air filter, a dirty carburetor, or faulty fuel are all possibilities. Step 1: If you see your system getting clogged, remove the old fuel from the tank and replace it with new. You can use a fuel stabilizer to keep the fuel stable ...I show how to fix intermittent shutting off issue with Ryobi 40v cordless lawnmower. I just used a T30 torx bit and tightened both handle's at the base. The screws become loose …Lawn mower sputtering is usually one of the symptoms that your mower has a maintenance problem that needs fixing. These problems include; clogged air and fuel filter, low-quality fuel, faulty spark plug, clogged carburetors, or water presence in the fuel tank. Identify the cause first to help fix it.Jul 10, 2021 · Jul 10, 2021 / Ryobi riding mower stalling? #2. Going backwards. For $ 3000 I would expect the quality for some thing I paid 3 weeks wages for,,,,, not much. My sister still has my fathers first petrol powered push mower. The unit owners next to her uses it to mow the common area for their block & 5 others. Jun 16, 2023 · This is just to stop the blade from spinning around as you tighten it. The block will ensure it stays in one place and makes the job much, much easier. You can also use a pair of vice grips to achieve this same result. Clamp them to the side of the deck tightly, and that’ll stop the blade from spinning round. it acts and sounds just like it does when the battery runs out. no clacking or hum. Just tried it again with all 3 batteries - all of which show fully charged on the charger - and same results on each battery - runs for 30 sec or so and then just stops I got this mower late feb and it has run well.A push mower may start and then die due to a lack of fuel, air, or spark due to plugged filters, bad fuel, a dirty carburetor, a clogged fuel system, a bad spark plug, or a faulty ignition coil. An insufficient engine oil level and plugged mower deck can also cause a mower to die. I have put together a list of causes that can be the reason your ...Apr 24, 2020 / Ryobi RM480E 38" riding mower won't move! #3. In the owners manual I found this; Mower won’t move: Start key not installed or is in OFF position. Parking brake is set. Direction control switch is in neutral (N). Brake is depressed and/or accelerator pedal is not pressed. Charger is connected to mower.Is Ryobi lawn mower a good brand? Ryobi offers a great combination of features at a reasonable price. It’s perfect for a small to medium-sized lawns, and especially attractive if you plan to buy other tools that can use the 40-volt battery architecture. It’s very light, very portable, does an excellent job cutting, and has ample run time.Conclusion. An electric mower can overheat just like a combustion engine mower. The difference is the batteries driving the electric engine will become too hot, and the rest of the machine will shut down. This shutting down can be avoided if you take the time to care for your device.I have a Ryobi electric riding lawn mower, model RY48110 (2019 vintage). The motor powering the mower blades cuts out about three seconds after engaging. (The mower itself drives around just fine.) I' … read moreApr 24, 2020 / Ryobi RM480E 38" riding mower won't move! #3. In the owners manual I found this; Mower won’t move: Start key not installed or is in OFF position. Parking brake is set. Direction control switch is in neutral (N). Brake is depressed and/or accelerator pedal is not pressed. Charger is connected to mower.If you’re a homeowner with a yard, a riding mower is imperative to help you with upkeep. Less arduous than a push mower, a lawn tractor or riding mower covers a lot of ground in little time. There are a few factors to consider as you make y...To fix this you’ll need to drain your lawnmower gas tang of its entire contents. Place a large plastic/metal pan next to the lawnmower and open the fuel tank to drain the contents of the gas tank out, clean the fuel lines and then add fresh fuel back into the tank.Technician: John Electrical. Here is a list of several things to try and get your mower working again. 1) The operator handle can be cycled from the closed stored position to upright operating position. 2) Try folding the handles down, then firmly fold open the handles to the operating position.Hi everyone, recently bought a 21" self-propelled ryobi lawnmower. It's the 40v HP brushless. It works fine for approximately 15 minutes but then it keeps stopping. Pressing on the buttons makes it start again, but the more I restart it, the more frequently it stops. It does it even if I simply use the self-propelled features (without the ... Jun 22, 2023 · So, take a seat on the lawn mower seat with the brake on. Give the key a turn to ON, then OFF. If there is a switch or electrical cabling fault, the clutch will engage as soon as it receives power by turning the key. You will be able to hear a clicking sound coming from the clutch as it engages and disengages.Step 6. Stand up. The mower will turn off if the switch works properly. If the mower stays running, the switch no longer works properly. Advertisement. Riding lawn mowers have a safety switch located under the seat. This switch, commonly called a “kill switch” turns off the engine when the mower deck is engaged and the rider gets off the seat.However Ryobi has a great customer service please call them(###) ###-#### Be sure to have the model and serial numbers of the mower, battery, and the charger handy. You have already tried several of the other items that I would have had you check.So I gave up, put the deck back on, and turned the key on to back it up to the charger. I turn the key, and the battery indicator flashes one bar, then goes blank, and then comes back on saying it is fully charged. I thought maybe it was over heating or something, and once it cooled off it was good to go again.The RYOBI ZT480ex Electric Riding Mower uses zero turn technology with lap bar steering to help cover more yard in less time. Cutting up to 3 acres on 1 charge, it's quietly and quickly changing the way America mows. A simple push of the lap bar steering delivers unrelenting torque directly to high-powered brushless motors.The reasons that cause your Ryobi lawn mower to shut off include a dirty or clogged air filter, carburetor, and clogged fuel cap. It also relates to damaged or uncharged batteries, defective spark plugs, fuel issues, and overheating of the lawn mower. It is frustrating that your grass trimmer keeps shutting off while mowing the grass.Apr 9, 2021 · tdcalahan. I have a very unique issue with my 3 year old Ryobi RM480E electric riding mower. Set to use if for the first time this season. Unplugged charger from unit. Sat in the seat. Turned on the key. Pushed rocker switch to forward and pushed accelerator and the mowing moved about an inch and power just went out. The Ryobi RM480E is an electric riding lawn mower that is operated by a battery. This riding mower is considered to be low maintenance since it does not have a spark plug, belts or filters. The Ryobi RM480E has up to 2 hours run time and a cruise control and quiet cutting feature. ... The start key may be in the off position. Battery ...No, you should not mow wet grass. When using an electric or gas lawn mower on wet grass, you run the risk of damaging your lawn mower. You could also harm yourself and could potentially end up with even more work to do in the long run. It is a rule of thumb to not cut your grass when it is wet outside. No matter how bad you want to cut it ...The Ryobi RM480E is one of the best riding lawn mowers you will find on the market. The problems indicated above may potray this machine as a problematic mower but that is not even the case. The problems indicated in this article can easily be resolved and they do not happen on a regular basis, so do not be discouraged to purchase it.Conclusion. An electric mower can overheat just like a combustion engine mower. The difference is the batteries driving the electric engine will become too hot, and the rest of the machine will shut down. This shutting down can be avoided if you take the time to care for your device.01 - Lawn Mower Carburetor. The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to stall.When the coil cools off, it will start again, then when it is hot again, it will shut off. Spray carburetor cleaner in the carburetor. Old or Bad Gasoline. The carburetor might be clogged. A clogged carburetor is most …2) Try folding the handles down, then firmly fold open the handles to the operating position. 3) The handles need to be fully extended for the mowers to operate correctly. 4) The grass bagger must be fully seated (installed correctly) for the mowers to start. 5) Batteries charged and fully installed.Ride the mower, and set the drive levers to the neutral position. 2. Set the cutting deck to the preferred cutting height. WARNING: Before driving the mower to the mowing location or driving over gravelly surfaces, set the cutting deck to the maximum height. Page 22 OPERATION 5. Drive the mower using the drive levers.Mar 1, 2023 · 7. RYOBI RY48ZTR100-1A 42 in. 100 Ah Battery Electric Riding Zero Turn Mower and Bagging Kit. The RYOBI RY48ZTR100 is a riding lawnmower with a rear electric engine. It also offers many other benefits. With Ryobi 48-Volt Riding Lawn Mowers, you can mow while removing fumes and gas from cutting lawns.A plugged fuel filter will restrict fuel flow and may cause your lawn mower to keep stalling. Solution: Replace a fuel filter by shutting off the fuel supply using the fuel shut-off valve …I have a Ryobi zero turn. I drive it for 15 minutes and the deck motors shut off. It acts as if something gets hot and shuts off the blade motors. I have changed the pto switch, both deck motors, and...3) Clogged Fuel Filter. The purpose of the fuel filter is to filter out all of the sediment from the gasoline. This filter can get clogged up from normal sediment, or from stale gas containing ethanol. The lack of proper fuel flow to the carburetor will prevent your mower from starting. If this is the case, the fuel filter will need to be replaced.

Ryobi 40V Brushless 20" Mower won't stay running. Battery is fine. Anyone else having similar issues?#ryobi #40v #cordless. Sport clips haircuts of sherwood

ryobi riding lawn mower keeps shutting off

I have a 21 inch self propelled battery operated Ryobi that keeps shutting off when you engage the self propel function. - Answered by a verified Technician. ... We have purchased a 21 inch lawn mower from Home Depot Sherbrooke, item number 046396036995 on june 19, 2022. It worked well until four days ago where the mover refused to start the blade.A ryobi mower that keeps shutting off has multiple symptoms that indicate a faulty machine. Engine shutting off randomly could be due to poor quality fuel or loose hoses. Difficulty starting the mower could mean a dead battery or dirty air filter. Poor performance and reduced power could indicate a damaged spark plug or clogged carburetor.Step 6. Stand up. The mower will turn off if the switch works properly. If the mower stays running, the switch no longer works properly. Advertisement. Riding lawn mowers have a safety switch located under the seat. This switch, commonly called a “kill switch” turns off the engine when the mower deck is engaged and the rider gets off the seat.Make sure your mower is definitely shut off and the blades are not set to “engaged” before you do anything. You might need to use a small jack to lift one side of your mower up to make the obstruction easier to get at. Safety Switch Under Seat Faulty/Not Properly Connected. There are a few different safety switches on most riding mowers.Modified: October 18, 2023 Written by: Emily Roberts Discover articles on why your Ryobi mower keeps shutting off and find solutions to help you keep your mower running …718 95K views 2 years 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 switches and the...Ryobi Lawn Mower Keeps Shutting Off – The Fixes Dirty Or Clogged Air Filter. There are numerous causes for a lawn mower’s airflow to be limited or obstructed. …Jun 22, 2023 · So, take a seat on the lawn mower seat with the brake on. Give the key a turn to ON, then OFF. If there is a switch or electrical cabling fault, the clutch will engage as soon as it receives power by turning the key. You will be able to hear a clicking sound coming from the clutch as it engages and disengages.Apr 24, 2020 / Ryobi RM480E 38" riding mower won't move! #3. In the owners manual I found this; Mower won’t move: Start key not installed or is in OFF position. Parking brake is set. Direction control switch is in neutral (N). Brake is depressed and/or accelerator pedal is not pressed. Charger is connected to mower.The Ryobi RM480E is an electric riding lawn mower that is operated by a battery. This riding mower is considered to be low maintenance since it does not have a spark plug, belts or filters. The Ryobi RM480E has up to 2 hours run time and a cruise control and quiet cutting feature. ... The start key may be in the off position. Battery ...When you drop the "dead man's switch" -- the bar across the handle that you hold close to keep the mower going -- or close the throttle on the side of the engine housing, it breaks the vacuum in the fuel system or stops the fuel pump sending fuel through the carburetor, and the engine dies. Not all mowers work exactly the same way, but when ...Check the battery: If your Ryobi lawn mower is equipped with a battery, ensure that it is properly charged. A weak or dead battery can result in insufficient power …I have a Ryobi 48130, RM300e riding lawn mower. When I engage the blades, they spin and sound like they will operate - Answered by a verified Technician. We use cookies to give you the best possible experience on our website. ... The blade motors keep shutting off every couple minutes.To fix this you’ll need to drain your lawnmower gas tang of its entire contents. Place a large plastic/metal pan next to the lawnmower and open the fuel tank to drain the contents of the gas tank out, clean the fuel lines and then add fresh fuel back into the tank. If the engine starts and keeps running after loosening the cap, the cap is clogged. 6. Excess Oil In The Reservoir. Sometimes the cause of your lawn mower starting then stopping after a few seconds is too much oil in its reservoir. If you there is a white smoke coming from the engine, that is a sign of excess oil..

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