Generally, the mixture of air and gas is what regulates the combustion of your Toro lawn mower. Because of this, deposits from bad gas or old fuel in the carburetor are likely the main culprit why this lawn mower won’t start . If you have mechanical knowledge in handling Toro mowers, cleaning the bad gas away by yourself isn’t so much of a ...A lawn mower that won’t start can be baffling, especially if you don’t know much about engines. Most people learned the workings of the combustion engine in high school during science class. Vague memories of Nicolaus Otto’s 1876 early engines certainly won’t help get your lawn mower up and running again.Connecting the Battery. If your battery wasn’t already connected when you received your mower, you will need to grab a couple of tools and make the connection yourself. First, make sure the mower is switched off. Then, use either a screwdriver or socket wrench and remove the terminal nut and bolt.Jan 8, 2023 · Fix: Replace the broken flywheel key. 2. No Fuel in the Fuel Tank. Another main reason why your Mtd mower won’t start is if your tank is empty. Empty fuel tanks can halt operations, cause sub-par performance and make rough sounds. It is important to always check your fuel level regularly before you start the machine. Sep 14, 2022 · Here are the things to check when starting your battery/corded lawn mower at the start of the season if your lawn mower won’t start after sitting over winter. Charging the Batteries For you guys with battery-powered mowers, the first thing you will want to ensure is that the batteries are fully charged. White or blue smoke may indicate an oil spill on the engine. If you’ve recently changed the oil in your mower and the engine is emitting white or blue smoke, it’s possible that some of the oil ...Jun 20, 2023 · Fixing a Lawn Mower That Won’t Start After Running (The Short Explanation) A lawn mower that won’t start after running usually has an issue with a heat-related problem. Internal and external cooling, altered air-to-fuel mixture, expanded components, and reduced electrical current can all be affected by a lawn mower getting hot. Feb 22, 2023 · Hearing nothing at all could also indicate that your mower is refusing to start because it is low on oil. If the engine is cranking slowly, you probably have a failing battery. Check the battery and alternator. If your pull cord is difficult to pull, check that the flywheel brake is disengaged. Feb 1, 2023 · 2. Bad or Old Gasoline. Using a gas that is either old or contaminated with excess moisture may make the mower not start. Over time, some of the ingredients in the gas may evaporate and leave a sticky substance that may clog the fuel system. Fix: Drain the old gas, flush the tank and add fresh gas. 15 - Honda Lawn Mower Recoil Starter Pulley. The recoil starter pulley winds up the starter rope when the rope is not in use. If the recoil pulley is broken or stuck, it won't be able to rewind the starter rope. As a result, the engine won't start. If the recoil starter pulley is broken, replace it. Required Part.2. Bad or Old Gasoline. Using a gas that is either old or contaminated with excess moisture may make the mower not start. Over time, some of the ingredients in the gas may evaporate and leave a sticky substance that may clog the fuel system. Fix: Drain the old gas, flush the tank and add fresh gas.4. Check the Oil Level. Photo: triocean / iStock / Getty Images Plus. Lawn mowers need oil just like cars—and that oil can also become contaminated with rainwater. If your lawn mower won’t start, check to make sure you have enough oil. If the oil has turned milky white, it’s a sign that water has contaminated it. 5.Step 3- Checking on the Fuse: The fuse is located right next to the starter solenoid, so pull the battery and battery box off to access the fuse. Next, move the Zip tie over and pull the fuse from the holder. If it looks broken, replace the Fuse. If you are confused either it’s bad or good see the image below.A fault in the ignition switch or wiring could also be why your lawn mower won’t start when hot. Electrical faults may prevent the spark necessary to ignite the fuel, causing starting problems. • Cooling Fins and Plastic Housing Upkeep. Another crucial aspect of lawn mower maintenance involves the cooling fins and plastic housing.01 - Toro Lawn Mower Spark Plug. Inspect the spark plug for signs of wear or damage. If the porcelain insulator is cracked, an electrode is burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug. To determine if the spark plug is defective, use a spark plug tester. You should see a strong spark between ...BEST OVERALL: John Deere 42-Inch S130 Lawn Tractor. RUNNER-UP: Husqvarna TS 354XD Riding Lawn Mower. BEST BANG FOR THE BUCK: Troy-Bilt Bronco 42 Riding Lawn Tractor. UPGRADE PICK: Cub Cadet Ultima ...White or blue smoke may indicate an oil spill on the engine. If you’ve recently changed the oil in your mower and the engine is emitting white or blue smoke, it’s possible that some of the oil ...6 Bail – Check that the bail lever cable is tight. If not, adjust it. Most models will have an adjuster at the handlebars or at the engine. If the bail lever isn’t pulling all the way, the mower won’t start. 7 Switch – The bail lever is connected to the engine brake, which usually incorporates a simple on-off switch.May 23, 2022 · An Ego mower won’t start if the handle isn’t locked into one of the predefined operating positions, isn’t fully extended, the clamps aren’t locked, or the mower deck is clogged. That’s a handful. But all of these are fairly easy to fix. First, unlock the clamps, release the handle, then fully extend the handle and lock the clamps again. 15 - Poulan Pro Lawn Mower Recoil Starter Pulley. The recoil starter pulley winds up the starter rope when the rope is not in use. If the recoil pulley is broken or stuck, it won't be able to rewind the starter rope. As a result, the engine won't start. If the recoil starter pulley is broken, replace it. Required Part.Step 1- Removing the Top Shroud Cover: First, remove the three Torx screws on top of the Shroud cover. Now that both screws are off at the back, you just have one left in the front end. So, remove the screw, and the cover will come off. Tips: while removing the top shroud cover, you have to pry up a bit and be careful because the fuel line and ...A lawn mower that starts and won’t stay running isn’t getting sufficient air, fuel, and spark. This can be due to old fuel, clogged fuel line, plugged fuel filter, dirty carburetor, plugged air filter, bad spark plug, faulty ignition coil, clogged fuel cap, or an incorrect choke setting. Performing routine maintenance on your lawn mower can ...To check if the flywheel is broken, remove the flywheel and inspect the flywheel key. Fix: Replace the broken flywheel key. 2. No Fuel in the Fuel Tank. Another main reason why your Murray mower won’t start is if your tank is empty. Empty fuel tanks can halt operations, cause sub-par performance and make rough sounds.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.To fix the fuel system of your lawnmower you must remove the air cleaner. Then inspect the choke plate which is mounted on a shaft at the opening of the throat of the carburetor. The choke plate must be free of dust, must move freely and close easily. A greasy choke plate won’t let your lawnmower stay running. Before you dig deeper into troubleshooting steps, change the fuel, clean the oil and air filter and try starting the mower. If it still won’t start, a dirty carburetor is the most common culprit for the lawnmower to not start after sitting for a while. You need to clean the carburetor and remove any oil or gunks deposited inside.First check whether the engine starts without that and if it does, put the air filter and try to start. If the lawnmower starts but then dies, it’s time to clean or change the air filter. If it still doesn’t get it fixed, you’re possibly looking at a faulty carburetor or one of the other causes mentioned below. 2.Apr 11, 2023 · 2. Bad Spark Plugs. A bad spark plug is another common reason why your lawn mower won't start. The spark plug is the component of your engine that creates the spark which ignites the gasoline. If you have the user manual, look up where the spark plugs are located. Make sure you handle the spark plugs carefully. When the lawn mower doesn’t get enough fuel, it won’t run. Some mowers have a hole in the gas cap. If this hole becomes clogged, the lawn mower won’t function properly. Therefore, check the hole in your lawn mower cap to make sure it’s clean. Next, check the filter on the gas tank. If it’s filled with gunk, use a wire brush to gently ... A riding mower won’t start when it isn’t getting sufficient air, fuel, and spark. This may be due to a dirty air filter, bad spark plug, plugged fuel filter, clogged fuel line, bad fuel pump, dirty carburetor, weak battery, faulty starter solenoid, or bad ignition switch. Keep reading for additional items that can cause your starting issue. 2. Bad Spark Plugs. A bad spark plug is another common reason why your lawn mower won't start. The spark plug is the component of your engine that creates the spark which ignites the gasoline. If you have the user manual, look up where the spark plugs are located. Make sure you handle the spark plugs carefully.White or blue smoke may indicate an oil spill on the engine. If you’ve recently changed the oil in your mower and the engine is emitting white or blue smoke, it’s possible that some of the oil ...5. Clean and refill the lawn mower fuel tank. An obvious—and often overlooked—reason your mower may not be starting is that the tank is empty or contains gas that is either old or contaminated ...TimeMaster - Blade Drive System Maintenance. This video will show you how to maintain the blade drive system on your Toro TimeMaster lawn mower as referenced in your Owners Manual. The Toro 30” Timemaster is a great way to keep your lawn looking great and save you some “Time” doing it. For more lawn mower how-to videos go to.Aug 12, 2021 · Check the plug. Clean or replace the filter when. Refill the gas tank. Tips to make your lawnmower start. Case 1: You fail to start the lawnmower at all. Case 2: The lawn mower runs erratically. Case 3: The lawn mower is overheat. Case 4: The lawnmower cut unevenly. Final thoughts. To fix the fuel system of your lawnmower you must remove the air cleaner. Then inspect the choke plate which is mounted on a shaft at the opening of the throat of the carburetor. The choke plate must be free of dust, must move freely and close easily. A greasy choke plate won’t let your lawnmower stay running.The crankshaft in a lawn mower sites vertically. At the bottom there is the blade. At the top there is a flywheel. The flywheel serves two purposes. The first is that it's big and heavy allowing it to store kinetic energy so that the lawn mower can continue to spin through the 3 unpowered strokes.Step 1- Removing the Top Shroud Cover: First, remove the three Torx screws on top of the Shroud cover. Now that both screws are off at the back, you just have one left in the front end. So, remove the screw, and the cover will come off. Tips: while removing the top shroud cover, you have to pry up a bit and be careful because the fuel line and ...Aug 12, 2021 · Check the plug. Clean or replace the filter when. Refill the gas tank. Tips to make your lawnmower start. Case 1: You fail to start the lawnmower at all. Case 2: The lawn mower runs erratically. Case 3: The lawn mower is overheat. Case 4: The lawnmower cut unevenly. Final thoughts. To fix the fuel system of your lawnmower you must remove the air cleaner. Then inspect the choke plate which is mounted on a shaft at the opening of the throat of the carburetor. The choke plate must be free of dust, must move freely and close easily. A greasy choke plate won’t let your lawnmower stay running. When a riding mower won’t move forward or reverse, things can get very dicey. Sadly, this can be caused by a wide variety of different things…. Inspect the fuel filter for blockages and clean it if your mower won’t move forward or reverse. Clean your air filter if it is clogged or replace it if it is damaged so the mower can operate properly.Jan 8, 2023 · To check if the flywheel is broken, remove the flywheel and inspect the flywheel key. Fix: Replace the broken flywheel key. 2. No Fuel in the Fuel Tank. Another main reason why your Ariens mower won’t start is if your tank is empty. Empty fuel tanks can halt operations, cause sub-par performance and make rough sounds. 01 - Toro Lawn Mower Spark Plug. Inspect the spark plug for signs of wear or damage. If the porcelain insulator is cracked, an electrode is burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug. To determine if the spark plug is defective, use a spark plug tester. You should see a strong spark between ...Jun 20, 2023 · There might be a chance that your lawn mower won’t turn over with a new battery because there’s actually an issue with the new battery. So, I use a 12v/6v DC selectable battery tester that I picked up at Harbor Freight for $20 to test my battery. This kind of tester allows you to test the battery at rest and when it’s under load. To check if the flywheel is broken, remove the flywheel and inspect the flywheel key. Fix: Replace the broken flywheel key. 2. No Fuel in the Fuel Tank. Another main reason why your Murray mower won’t start is if your tank is empty. Empty fuel tanks can halt operations, cause sub-par performance and make rough sounds.5 Steps to troubleshoot a lawn mower that won’t prime: Reportedly, it’s a common issue that almost every lawn mower user encounter sooner or later. But imagine you are all set to mow your lawn or garden on a perfect day, and when you attempt to start the mower, it won’t prime as well as there’s no sign of fuel coming out. Problem #20– Improper Storage. Improper storage can lead to several issues with a Troy Bilt mower, resulting in it failing to start. Here are some reasons why: Old or contaminated fuel: If the fuel is left in the mower for too long, it can go stale or contaminated with water, leading to issues with the fuel system.15 - Lawn Mower Recoil Starter Pulley. The recoil starter pulley winds up the starter rope when the rope is not in use. If the recoil pulley is broken or stuck, it won't be able to rewind the starter rope. As a result, the engine won't start. If the recoil starter pulley is broken, replace it. Required Part.I have a Toro Recycler, which came with the house when I bought it. The house was purchased in 2016 and I'm going to guess the lawn mower was purchased in the 2012-2013 range. The mower turns but won't start. More specifically, it sounds like it's very close to starting but it doesn't get there.01 - Toro Lawn Mower Spark Plug. Inspect the spark plug for signs of wear or damage. If the porcelain insulator is cracked, an electrode is burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug. To determine if the spark plug is defective, use a spark plug tester. You should see a strong spark between ...Mar 15, 2022 · 4. Check the Oil Level. Photo: triocean / iStock / Getty Images Plus. Lawn mowers need oil just like cars—and that oil can also become contaminated with rainwater. If your lawn mower won’t start, check to make sure you have enough oil. If the oil has turned milky white, it’s a sign that water has contaminated it. 5. 1. Insufficient Battery Power or Connection Issues. Sometimes, your Toro mower won’t start because of its battery. Think of the battery as its power source, like the heart of your mower. If the battery is weak or not connected properly, your mower can’t wake up and get to work.15 - Poulan Pro Lawn Mower Recoil Starter Pulley. The recoil starter pulley winds up the starter rope when the rope is not in use. If the recoil pulley is broken or stuck, it won't be able to rewind the starter rope. As a result, the engine won't start. If the recoil starter pulley is broken, replace it. Required Part.The grass doesn’t just stop growing. An Ariens lawn mower won’t start when there is a lack of fuel due to old gas, a clogged fuel line, a dirty carburetor, a faulty fuel pump, or a bad fuel cap. It also won’t start when there is a lack of air or spark due to a plugged air filter, an incorrect choke setting, a bad spark plug, a faulty ...Sep 4, 2023 · 1. Insufficient Battery Power or Connection Issues. Sometimes, your Toro mower won’t start because of its battery. Think of the battery as its power source, like the heart of your mower. If the battery is weak or not connected properly, your mower can’t wake up and get to work. White or blue smoke may indicate an oil spill on the engine. If you’ve recently changed the oil in your mower and the engine is emitting white or blue smoke, it’s possible that some of the oil ...Answer: To fix a Yard Machine Lawn Mower that won’t start, start by checking the fuel level and quality, ensuring the spark plug is clean and properly connected, and inspecting the air filter for any clogs. Additionally, consider checking the oil level, fuel filter, and the mower’s safety interlock system.15 - Poulan Pro Lawn Mower Recoil Starter Pulley. The recoil starter pulley winds up the starter rope when the rope is not in use. If the recoil pulley is broken or stuck, it won't be able to rewind the starter rope. As a result, the engine won't start. If the recoil starter pulley is broken, replace it. Required Part.Aug 21, 2021 · Sometimes when your lawn mower won’t start, the issue can be as simple as a filter or a plug. In some cases, however, it may be more involved. If your mower isn’t starting, investigate the basics of what makes it work — spark, fuel and air — and see if you can fix the problem yourself before calling a repair shop. 2. No Fuel in the Fuel Tank. Another main reason why your Craftsman mower won’t start is if your tank is empty. Empty fuel tanks can halt operations, yield below par performance and make rough sounds. It is important to always check your fuel level regularly before you start the machine.Jul 20, 2015 · 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. Remember that keeping your lawn mower well maintained will help to ensure it performs to the best of its ability. Toro Mower Won’t Start (Solved) 15 Reasons Your Toro Lawn Mower Won’t Start. 1. No Gas In The Fuel Tank. 2. Fuel Valve On Your Toro Mower Is In The Off Position. 3. Damaged Carburetor.It happens to the best of us. Your mower won’t start after leaving it in the rain because water may have gotten into the engine oil, fuel system, and electrical components like the ignition switch, safety switches, and spark plug boot. Lawn mowers are not waterproof, but they can get wet. Some parts of your lawn mower can take a little bit of ... Push Lawn Mower. Newly added gasoline is stale and won’t combust. Pinch off fuel line running to carburetor. Disconnect fuel line from carburetor and place the fuel line in a jar. Remove the pinch and allow the stale fuel to drain. Empty carburetor bowl of stale fuel. Reconnect fuel line and fill with fresh fuel. 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. The grass doesn’t just stop growing. An Ariens lawn mower won’t start when there is a lack of fuel due to old gas, a clogged fuel line, a dirty carburetor, a faulty fuel pump, or a bad fuel cap. It also won’t start when there is a lack of air or spark due to a plugged air filter, an incorrect choke setting, a bad spark plug, a faulty ...Proper storage. When storing your mower for an extended period, make sure the fuel cap is well-tightened to prevent fuel evaporation and contamination. 4. Bad Spark Plug or Loose Connection. Another common reason why your trusty Murray lawn mower might refuse to start is a bad spark plug or a pesky loose connection.15 - Honda Lawn Mower Recoil Starter Pulley. The recoil starter pulley winds up the starter rope when the rope is not in use. If the recoil pulley is broken or stuck, it won't be able to rewind the starter rope. As a result, the engine won't start. If the recoil starter pulley is broken, replace it. Required Part.May 20, 2018 · If your lawn mower won't start or doesn't stay running, it may just be some gunk in the carburetor. This is the quick backyard way to clean out your lawnmowe... The crankshaft in a lawn mower sites vertically. At the bottom there is the blade. At the top there is a flywheel. The flywheel serves two purposes. The first is that it's big and heavy allowing it to store kinetic energy so that the lawn mower can continue to spin through the 3 unpowered strokes.If your lawn mower won't start or doesn't stay running, it may just be some gunk in the carburetor. This is the quick backyard way to clean out your lawnmowe...There are numerous reasons why your riding lawn mower might not start because of fuel. Two of the most commonly found issues are that the lawnmower is out of fuel or that the fuel is too old or the wrong kind. These problems are usually easy enough to solve. Out of fuel. As with any other machine that uses fuel, it is essential to check the ...See full list on bobvila.com 2. Bad Spark Plugs. A bad spark plug is another common reason why your lawn mower won't start. The spark plug is the component of your engine that creates the spark which ignites the gasoline. If you have the user manual, look up where the spark plugs are located. Make sure you handle the spark plugs carefully.Sometimes, it really is a simple fix. Often, a frozen or stuck pull cord for a lawnmower is due to a blocked blade. In this case, the rear debris shield wa...To check if the flywheel is broken, remove the flywheel and inspect the flywheel key. Fix: Replace the broken flywheel key. 2. No Fuel in the Fuel Tank. Another main reason why your Scag mower won’t start is if your tank is empty. Empty fuel tanks can halt operations, cause sub-par performance and make rough sounds.Sep 14, 2022 · Here are the things to check when starting your battery/corded lawn mower at the start of the season if your lawn mower won’t start after sitting over winter. Charging the Batteries For you guys with battery-powered mowers, the first thing you will want to ensure is that the batteries are fully charged. 15 - Lawn Mower Recoil Starter Pulley. The recoil starter pulley winds up the starter rope when the rope is not in use. If the recoil pulley is broken or stuck, it won't be able to rewind the starter rope. As a result, the engine won't start. If the recoil starter pulley is broken, replace it. Required Part.May 11, 2022 · There are numerous reasons why your riding lawn mower might not start because of fuel. Two of the most commonly found issues are that the lawnmower is out of fuel or that the fuel is too old or the wrong kind. These problems are usually easy enough to solve. Out of fuel. As with any other machine that uses fuel, it is essential to check the ... Lawn mowers won’t turn over trouble is not a new thing among the mower user community, and sometimes, easy DIY fixing techniques can save both your time and money. Initially, the entire troubleshooting process might seem a bit complicated, but if you follow all the instructions given in today’s article, you can fix the problem easily and ...A hydrostatic riding lawn mower won’t move forward or reverse due to a bad drive belt; bad tensioner pulley; broken tensioner spring; old, low, or hot hydraulic fluid; air in the hydraulic system; or the drive release lever in the bypass position. I’ll share with you items to check in your hydraulic system along with some non-hydraulic ...May 1, 2017 · Find replacement lawn mower parts:https://www.repairclinic.com/Shop-For-Parts/a21/Lawn-Mower-Parts?TLSID=?1894Lawn mower won't start? This video provides inf... Remember that keeping your lawn mower well maintained will help to ensure it performs to the best of its ability. Toro Mower Won’t Start (Solved) 15 Reasons Your Toro Lawn Mower Won’t Start. 1. No Gas In The Fuel Tank. 2. Fuel Valve On Your Toro Mower Is In The Off Position. 3. Damaged Carburetor.To fix the fuel system of your lawnmower you must remove the air cleaner. Then inspect the choke plate which is mounted on a shaft at the opening of the throat of the carburetor. The choke plate must be free of dust, must move freely and close easily. A greasy choke plate won’t let your lawnmower stay running.Jan 8, 2023 · Fix: Replace the broken flywheel key. 2. No Fuel in the Fuel Tank. Another main reason why your Mtd mower won’t start is if your tank is empty. Empty fuel tanks can halt operations, cause sub-par performance and make rough sounds. It is important to always check your fuel level regularly before you start the machine.
2. Replace the fuel filter. If you own a Husqvarna mower and it won’t start, the most likely cause would be a clogged fuel filter. This usually happens if you’ve left fuel in your mower for long. The best fix is to drain off the old fuel from the gas tank and replacing the filter. 3. . Gogo no kouchou junai mellow yori 1
6 Bail – Check that the bail lever cable is tight. If not, adjust it. Most models will have an adjuster at the handlebars or at the engine. If the bail lever isn’t pulling all the way, the mower won’t start. 7 Switch – The bail lever is connected to the engine brake, which usually incorporates a simple on-off switch.15 - Worx Lawn Mower Recoil Starter Pulley. The recoil starter pulley winds up the starter rope when the rope is not in use. If the recoil pulley is broken or stuck, it won't be able to rewind the starter rope. As a result, the engine won't start. If the recoil starter pulley is broken, replace it. Required Part.Craftsman Mower won’t Start with Water in the Fuel. The presence of water in your fuel tank is another common reason your lawn mower won’t start. Your mower’s fuel gets contaminated by fuel typically by leaving it outside in the rain or snow, or condensation can occur if your mower is stored in a cold or damp environment.If your battery is flat, or overheated, that could be the problem. Let the battery cool down and charge it. If the battery is freshly charged and tests good in the charger, it’s not the battery. But if the mower was working and stopped suddenly, this is a very common reason. Let the battery cool down and then charge it.Common problems of mowing thick and tall grass. 1. Overload. Many lawnmowers consist of overload protection. The protection ensures that the massive quantity of long and thick grass does not start interfering with the motor or the other parts of the lawnmower. When the overload happens, the lawnmower will shut itself down.Follow step-by-step instruction to determine why your mower won't start: checking fuel levels, spark plug, carburetor and compression. Follow along this DIY video to troubleshoot and learn when it's best to service your mower. First step, check the fuel tank to make sure there is enough fuel to operate your snow blower. Here are the things to check when starting your battery/corded lawn mower at the start of the season if your lawn mower won’t start after sitting over winter. Charging the Batteries For you guys with battery-powered mowers, the first thing you will want to ensure is that the batteries are fully charged.Push Lawn Mower. Newly added gasoline is stale and won’t combust. Pinch off fuel line running to carburetor. Disconnect fuel line from carburetor and place the fuel line in a jar. Remove the pinch and allow the stale fuel to drain. Empty carburetor bowl of stale fuel. Reconnect fuel line and fill with fresh fuel. Proper storage. When storing your mower for an extended period, make sure the fuel cap is well-tightened to prevent fuel evaporation and contamination. 4. Bad Spark Plug or Loose Connection. Another common reason why your trusty Murray lawn mower might refuse to start is a bad spark plug or a pesky loose connection.Fix: Replace the broken flywheel key. 2. No Fuel in the Fuel Tank. Another main reason why your Mtd mower won’t start is if your tank is empty. Empty fuel tanks can halt operations, cause sub-par performance and make rough sounds. It is important to always check your fuel level regularly before you start the machine.A lawn mower that starts and won’t stay running isn’t getting sufficient air, fuel, and spark. This can be due to old fuel, clogged fuel line, plugged fuel filter, dirty carburetor, plugged air filter, bad spark plug, faulty ignition coil, clogged fuel cap, or an incorrect choke setting. Performing routine maintenance on your lawn mower can ...Answer: To fix a Yard Machine Lawn Mower that won’t start, start by checking the fuel level and quality, ensuring the spark plug is clean and properly connected, and inspecting the air filter for any clogs. Additionally, consider checking the oil level, fuel filter, and the mower’s safety interlock system.Jul 17, 2016 · The crankshaft in a lawn mower sites vertically. At the bottom there is the blade. At the top there is a flywheel. The flywheel serves two purposes. The first is that it's big and heavy allowing it to store kinetic energy so that the lawn mower can continue to spin through the 3 unpowered strokes. .