Cub Cadet Starts Then Dies While Mowing (2023)

You’re almost done mowing when your Cub Cadet shuts off in the middle of the yard. All you can think of is how much money it’s going to cost to repair your lawn mower. You probably didn’t budget for mower repairs so having to spend money is frustrating. No one enjoys spending money to fix their mower.

A Cub Cadet Lawn Mower may start then die when it is unable to regulate the air to fuel mixture required by the engine to form a combustion. This could be caused by a dirty carburetor, bad fuel, plugged air filter, broken fuel pump, plugged fan or other components that can restrict fuel or air flow.

There are some easy repairs that can fix the issue of your lawn mower shutting off. You may be able to fix the mower yourself.

I’ll share common problems that can cause your mower to shut off and how you can complete the repairs to save you time and money. I’ll also let you know when it is time to take your mower to a professional mechanic for repair.

Cub Cadet Starts Then Dies While Mowing (1)

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Follow all safety instructions provided in your equipment operators manual prior to diagnosing, repairing or operating. Consult a professional if you don’t have the skills, knowledge or are not in the condition to perform the repair safely.

Reasons Your Cub Cadet Dies While Mowing

Fuel Problem in Your Cub Cadet Mower

I assume the first thing you checked when your Cub Cadet mower died was the fuel level in the gas tank. If you are out of fuel, fill it with fresh fuel.

Even though your lawn mower has plenty of fuel in the tank, fuel can still be the problem. One of the most likely causes your lawn mower stopped is due to fuel issues.

Here arefuel related items to check:

Bad Fuelin Your Cub Cadet Lawn Mower

Did you know most of today’s gas contains ethanol, a corn-based product, that is has been developed because it is more environmentally friendly than traditional fuels?

Running fuels with some ethanol content is fine for your car, but it is not good for your Cub Cadet small engine.

(Video) How to fix a lawn mower that starts but then stalls right away

Ethanol attracts moisture in the fuel system and will begin to separate from gasoline sinking to the bottom of the tank. Solutions with water and ethanol are damaging to your lawn mower and need to be removed.

To protect your lawn mower from the effects of ethanol, use your fuel supply within 30 days of buying and only buy fuel from a busy gas station.

A fuel additive can be added to your fuel system to stabilize your fuel against ethanol separation and moisture buildup. This solution needs to be added to fresh fuel and cannot reverse separation that has already occurred.

I recommend Sea Foam Motor Treatment for your fuel system. You can read more about it in “Why Use Sea Foam Fuel Additive in a Lawn Mower”.

FIX:Drain the fuel tank by removing fuel and placing in a container for recycling. Flush the fuel tank and fill with fresh fuel treated with a fuel stabilizer.

I like Sea Foam because it not only stabilizes your fuel,but itis also a fuel system cleaner.Follow the directions on the bottle for mixing.

Wrong Fuelin Your Cub Cadet

There are so many different types of fuel on the market today. It can get confusing to see all of the different colored fuel pump handles (they are not always consistent in color at each fuel station) and accidentally grab the wrong type of gas.

I had a customer tell me he was running the correct type of fuel and the reason his mower died was the fault of the manufacturer. After he thought about it, a couple days later he realized his grandchild grabbed the yellow handle at the fuel pump when filling the gas can.

This happened to be E85 fuel which has an ethanol content of 85%. A fuel with such a high concentration of ethanol will damage the fuel system and engine.

Small engines require an unleaded gasoline with an octane rating of 87 or greater. The gas must also contain no greater than 10% ethanol. Read the sticker on the fuel pump that shows both the octane rating and ethanol content percentage to confirm the gas you are using.

Most gas stations will carry fuels with 10% (E10) or 15% (E15) ethanol contents. Avoid using the E15 fuels and especially the E85 fuel that is beginning to appear at more gas stations.

For a more in depth look at fuel for your Cub Cadet lawn mower, check out my article on Cub Cadet gas.

(Video) Cub Cadet Stalling While Cutting

FIX:Drain the fuel tank, flush the fuel tank and fill with fresh fuel treated with Sea Foam Motor Treatment.If your lawn mower continues to have problems, have a small engine mechanic take a look at it.

Cub Cadet Has a Dirty Carburetor

A dirty carburetor can be the reason your Cub Cadet mower start and then dies. The deposits left behind by bad fuel can create a buildup in your carburetor.

The carburetor’s function is to regulate fuel flow and air going into the engine cylinder to create a combustion. When it becomes clogged, it no longer is able to regulate the gas and air mixture.

FIX:Most likely the carburetor can be cleaned, but is possible the buildup of deposits can be so bad that you won’t be able to get it clean enough to run efficiently. Note: No matter how hard you try, it is difficult to remove all buildup in your carburetor.

If you are mechanically inclined you can try to clean your Cub Cadet carburetor yourself, otherwise a lawn mower repair shop will be able to help you.

If you don’t want to try to tackle cleaning your Cub Cadet carburetor, I suggest taking it to your local lawn mower mechanic for assistance.

Cub Cadet Has a Broken Fuel Pump or Plugged Fuel Filter

A bad fuel pump is another reason that may have caused your Cub Cadet to stop while running. A fuel pump is used to pump gas to your carburetor. When the pump is broke or cracked, it fails to hold the pressure required to pump fuel.

FIX:Identify you have a faulty fuel pump by using your fuel shut off valve or clamps to start and stop fuel flow as you test your fuel lines for fuel flow.

Once you have identified you are getting fuel to the pump, you will need to test the pump to see if fuel is being pumped out to your carburetor.

Do this by removing the fuel line from the carburetor and placing the line in a container. Start your lawn mower and watch the fuel line in container to check for fuel being pumped out of your fuel pump.

You will want to see a steady or pulsating flow of fuel to know your fuel pump is operating as designed. Replace a fuel pump that has cracks in it or is no longer able to pump fuel to the carburetor.

Blocked Fuel Linesor Fuel Filter on Your Cub Cadet

Just like your carburetor can become clogged from running bad fuel, your fuel lines and fuel filter can also become plugged. Ethanol attracts moisture in the fuel system.

(Video) How To Fix a Lawn Mower That Quits, Dies or Stalls After 2 Minutes

When that moisture evaporates, it leaves behind a gummy substance that runs through your fuel system and can cause blockages that restricts fuel supply causing your Cub Cadet to die after starting.

FIX:Replace a dirty fuel filter or a filter that isn’t allowing fuel to pass through. To clear a clogged fuel line, remove the line, spray carb cleaner into the line followed by compressed air to remove the blockage. Reinstall the line. Fuel line can easily be replaced with new fuel line.

Bad Gas Capon Your Cub Cadet

Something as simple as a gas cap can cause your Cub Cadet mower to die. Fuel caps are designed to vent. When the vent is blocked, a vacuum is created in the fuel tank which restricts the fuel flowing out of the tank.

FIX:Remove your fuel cap and start your lawn mower, allow to run. If your Cub Cadet no longer dies, this can be your problem. Be careful to not let any dirt or debris enter your fuel system when testing your mower without the fuel cap.

Replace the fuel cap. If your lawn mower shuts off after running a while, the fault can be with your fuel cap. You can try to see if you can clean the cap to allow it to vent. If you cannot, you need to replace thegas cap.

Air Circulation Problem in Your Cub Cadet Mower

Cub Cadet Has a Plugged Lawn Mower Air Filter

Something as simple as a plugged air filter can cause your Cub Cadet to shut off. Your engine requires clean air to operate efficiently. If your air filter is plugged with grass, dirt and other debris, it can cause your engine to overheat because it is no longer able to get the air it requires.

Using a dirty air filter won’t only cause your mower to stop when running, but it can also cause extensive engine damage. Spending a little money to keep a clean air filter in your engine can save you a large engine repair or replacement bill down the road.

FIX:Remove the air filter from the air filter housing making sure not to knock any loose dirt into the air intake. If your air filter is a paper filter, knock the dirt out of the filter by tapping the filter against a solid surface.

Hold the air filter up to a light and make sure you see light through the filter. If you see light, that means air is still able to pass through the filter. You will need to replace the air filter if you are unable to see light through the paper filter.

Your Cub Cadet lawn mower may use a different style air filter. For cleaning procedures for other types of filters, read thisarticle.

Cub Cadet Has Dirty or Damaged Cooling Fins

Cooling fins can get packed with dirt, grass and oil. When the fins break or become packed with debris, the fins are not able to effectively circulate air around the engine block and cylinder head to keep your engine cool.

FIX:Remove the engine cover and clean the cooling fins. Replace any damaged fins. Ensure the heat shield is attached correctly.

(Video) Cub Cadet lawn tractor stopped running while mowing

Other Problems that Can Cause Your Cub Cadet Mower to Die

Too Much Oil or Too Little Oil in Your Cub Cadet

Too much oilin your Cub Cadet lawn mowercan cause your engine to smoke anddie while mowing. The smoke can clog your air filter causing your engine to look elsewhere for air.

Too much oil in your lawn mower can cause significant damageincluding internal engine damage and the possibility of having to replace your engine.

Too little oilin your Cub Cadet mower will cause additional friction in the engine that can cause your engine to overheat and die.

FIX:Perform your engine oil change according to Cub Cadet’s recommendations. Always fill oil to the correct oil fill levels.

Plugged Mower Deck & Dull Blades

A Cub Cadet mower deck that is packed with grass and dirt or a deck that is running dull blades can cause your engine to have to work harder. Your blades may be hitting debris each time it turns putting a draw on your engine. This can make it overheat and shut down.

FIX:Inspect your mower deck for any damage. Scrape the deck to remove debris and sharpen the blades. Always run your mower at full throttle when cutting grass. Avoid cutting wet grass.

Your Cub CadetWill Not Start, Overheats or Smokes

While I have listed the most common problems your Cab Cadet may die while mowing, you may find more information on your issue if you have a starting or overheating problem. Refer to these articles on your Cub Cadet for more troubleshooting steps:

Reasons a Cub Cadet Mower Wont Start: A Complete List

7 Things That Can Cause a Mower to Overheat

Why Your Cub Cadet Lawn Mower is Smoking

More Cub Cadet Problems & Solutions

As an owner of a lawn mower, you are guaranteed to run into problems over the life of the lawn mower. I have put together a list of the most common Cub Cadet problems & solutions to give you a guide to when identifying the cause of your problem.

You never know when you’re going to run into more problems with your mower. Make sure you read and add this guide to your favorites: “Common Cub Cadet Mower Problems“.

(Video) Fixing A Lawn Tractor That Starts & Dies - Video

FAQs

Why is my lawn mower starting then dying? ›

The main reasons for why your lawn mower starts with starter fluid then dies are: issues with the carburetor, a clogged air filter, bad or old gas, spark plugs that aren't firing correctly, and an improper oil level.

Why does my lawn mower dies when I give it gas? ›

A fuel cap that has been damaged or isn't allowing air to enter the fuel tank is a really common cause for a lawn mower that runs for 30 minutes then dies. Make sure that the fuel cap is in good condition and has a vent that works properly.

Why does my Cub Cadet shut off when I engage the blades? ›

The pulleys in your lawn tractor are driven by the drive belt, and turn the spindles. If a pulley doesn't spin freely, it can cause the engine to die when the blades are engaged. To check the pulleys for sticking and damage, first remove the drive belt from the engine pulley and lift the lever to engage the blades.

Why does my lawn mower run for a few minutes then stops? ›

If your lawn mower starts, runs for a while, then dies, check the ignition coil, gas cap, and spark plug. One or more of these parts could be causing your problem. Follow our repair and symptom guide to help you fix this.

Why does my Cub Cadet keep dying? ›

A Cub Cadet Lawn Mower may start then die when it is unable to regulate the air to fuel mixture required by the engine to form a combustion. This could be caused by a dirty carburetor, bad fuel, plugged air filter, broken fuel pump, plugged fan or other components that can restrict fuel or air flow.

How do you clean a lawn mower carburetor without removing it? ›

Use Carburetor Cleaner

Fortunately, you can generally do this without even taking the carburetor out of the engine. Start by purchasing some commercial lawnmower carburetor cleanerOpens a new window, which comes in a simple spray can and will make it easy to clean the inside and outside of the carb.

Why does my Kohler engine keep shutting off? ›

The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the engine 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.

How do you fix a lawn mower that won't stay running? ›

How To Fix Lawn Mower That Wont Stay Running! - YouTube

How do you unclog a lawn mower carburetor? ›

How to Clean the Carburetor on a Lawn Mower - YouTube

Why won't my Cub Cadet mower keep running? ›

A Cub Cadet lawn mower won't stay running when old or dirty gas causes fuel restrictions in the fuel filter, fuel lines, fuel pump and carburetor. A plugged air filter, bad spark plug, or faulty ignition coil can also result in a Cub Cadet that won't continue to run.

Why does my lawn mower bog down when I turn the blades on? ›

The most common reason why lawn mowers bog down, especially mulching mowers, is grass clippings sticking to the underside of the deck. If your mower packs in too many clippings, there's not enough room for the clippings to cycle and the blade to keep turning. Fixing this is easy enough, it's just a messy job.

Why does my riding mower keep dying? ›

The spark plugs are worn or damaged

If you find that your lawnmower keeps dying, or keeps stalling while cutting grass, then inspect the spark plugs. Look for signs of damage or wear. Something as simple as a cracked porcelain insulator can mean an electrode has been damaged or burned away.

Why does my riding mower stop running when it gets hot? ›

Your lawnmower may stop running when hot due to an overheated engine, air leaks, a clogged fuel system, or the carburetor not getting enough gas. It is also possible that the engine is not cooling as it runs because of a dirty air filter. Finally, worn-out pistons may also be the problem.

How long do spark plugs last in lawn mowers? ›

The standard life of a lawn mower spark plug is 25 hours.

It doesn't matter how well you take care of your lawn mower, spark plugs wear out after about a season's use.

Will a weak battery cause my mower to stall? ›

Check that all the safety switches are working correctly, it is possible the seat switch is bad or loose plug/ bad wire. Also if battery weak or charging system weak/faulty the clutch will stall out engine, charge battery up with charger and try.

Where is the fuel filter on a Cub Cadet lawn mower? ›

How To Change the Cub Cadet ZT2 Fuel Filter - YouTube

Where are the safety switches on a Cub Cadet riding mower? ›

The safety switch is attached to the bottom of the seat.

Can I put carb cleaner in my lawn mower? ›

Wearing durable gloves for skin protection, use a carburetor cleaner for lawn mowers to spray into the throat of the carburetor or clean the part's exterior. To clean the internal pieces of the carburetor, though, you will need to remove it entirely from the engine.

Will seafoam help clean a carburetor? ›

Use Sea Foam Spray to safely and effectively clean residues and deposits from intake valves, chambers and compression rings! Sea Foam Spray delivers a high concentration of petroleum cleaning solvency and lubricity to carburetor throttle valves, intake runners and valves, and chamber areas.

Why does my riding lawn mower only run for a few seconds then dies? ›

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.

How do you adjust a carburetor on a Kohler engine? ›

How to Adjust a Carburetor on a 16 HP Kohler
  1. Set the engine on a hard, flat surface. ...
  2. Move the throttle to the "Slow" position. ...
  3. Locate the carburetor on the right side of the engine directly under the air filter. ...
  4. Turn the limiter cap with the flathead screwdriver until the tachometer reads 1650 plus or minus 75 rpm.

What does a Kohler carb solenoid do? ›

How to Check a Solenoid Fuel Shut Off Valve on a Kohler V-twin Engine

Can a bad spark plug cause a mower to stall? ›

A bad spark plug often causes an engine cylinder to misfire or sound like it's struggling. The engine might even stall out completely while you are mowing. You may also notice that it becomes increasingly more difficult to restart the mower each time that it dies.

Why is my ride on lawn mower turning over but not starting? ›

Dirty Air Filter

An air filter that's not letting enough air into the motor can inhibit combustion. Locate the air filter on your mower and remove the plastic cover. If the filter is covered in dirt, grass, or some other contaminant, this may be the reason for your lawn mower turning over but not starting.

Why does my lawn mower stall when it gets hot? ›

A lawn mower that quits when hot is caused by a plugged air filter, a clogged mower deck, an incorrect engine oil level, a bad spark plug, a faulty ignition coil, old fuel or a plugged fuel cap. Before you begin working on your lawn mower, follow the safety instructions in your owner's manual to prevent injury.

Can you clean carburetor without removing? ›

Use carburetor cleaner to remove deposits, clogs & debris

Deposits inside the carburetor can clog fuel and air passages and reduce performance or stop the engine altogether. Luckily, you can take care of many of these problems quickly and easily; often without even removing the carburetor from the engine.

Can I spray carb cleaner into the carb? ›

Position the tip of the aerosol can into the center of the carburetor and spray directly into the running carburetor. Doing this while the carburetor is running allows the cleaner to penetrate inside and clean the carburetor's throat and remove deposits that exist in the lower throttle plate.

Why is my Cub Cadet not getting fuel? ›

A Cub Cadet mower may not be getting fuel because bad gasoline has clogged the fuel system components including the fuel filter, fuel lines and carburetor. A bad fuel pump can also fail to get fuel to your Cub Cadet's engine.

Where is the spark plug on a Cub Cadet riding mower? ›

How to change the spark plug in a Cub Cadet LT 1042 - YouTube

Where is the air filter on a Cub Cadet riding mower? ›

How To Change the Air Filter on a Cub Cadet XT1 Tractor - YouTube

Why does my mower sputter when I engage the blades? ›

Lawn mower sputtering is usually one of the symptoms that your mower has a maintenance problem that needs fixing. These problems; clogged air and fuel filter, low-quality fuel, faulty spark plug, clogged carburetor, or water presence in the fuel tank.

What causes a small engine to lose power? ›

Causes. Incorrect amounts of air or fuel will cause the engine to run sporadically or not at all, as will a weak or improperly timed spark. An engine not getting the right amount of fuel, air or a proper spark will exhibit a loss of power.

Why does my lawn mower run sluggish? ›

The dusty conditions can plug the air filter causing the lawn mower to run rough and sluggish when the engine can't get sufficient air. Solution: Remove your air filter and check its condition. Clean a dirty air filter and replace it when it is extremely dirty, covered in oil or not in good condition.

Why is my Cub Cadet sputtering? ›

Your riding mower can sputter due to using a bad batch of fuel in the tank, a damaged gas cap, clogged air filters, excess grass under the deck, a damaged spark plug, a clogged carburetor, or water in the fuel tank. These factors tend to cause your mower to lose power, leading to sputtering.

Why does my riding lawn mower only run on choke? ›

Working on the fuel and air supply end of things, if your lawn mower only runs with the choke on, there is probably a fuel delivery or carburetor problem. The main carburetor issues that cause this are air leaks, and clogging. Bad fuel or fuel with too high of an alcohol content can also require excessive choke use.

Why does my small engine shut off when it gets hot? ›

Vapor Lock

A simple, often overlooked, trigger for an engine stall occurs when the heated gases inside the fuel tank can't vent properly. The pressure causes the gas flow to reverse and move out of the carburetor, effectively shutting the engine down.

What is vapor lock on lawn mower engine? ›

Vapor lock generally occurs when the fuel (usually gasoline) within the fuel delivery system overheats and vaporizes too rapidly. The resulting excess gas bubbles accumulate to the point of actually blocking normal fuel delivery.

How do I clean the cooling fins on my riding mower? ›

Cleaning the Cooling Fins in a Lawn Mower - YouTube

How do I know if my lawn mower needs a new spark plug? ›

If you haven't turned on your engine recently, your mower won't start and/or you have to tug repeatedly on the rewind to start the engine, a damaged spark plug may be the culprit. These problems may also cause excessive fuel consumption, deposits on the cylinder head and oil dilution.

Can I use a car spark plug in a lawn mower? ›

Most automobile engines use spark plugs with a thread size of about 14mm, whereas most lawn mower engines use spark plugs with a thread size of about 10 to 12mm. Because the size specifications are different, the two spark plug types can't be interchanged. They won't fit in the same unit.

Can you clean spark plugs with wd40? ›

WD-40 removes carbon residue and keeps moisture away from spark plugs and spark plug wires. WD stands for Water Displacement, so if your spark plugs are wet or you need to drive moisture away from ignition distributors, for example, WD-40 is a product you should have handy!

Why does my lawnmower run for 10 minutes then dies? ›

As the fuel level drops, a vacuum begins to form in the fuel tank because air can get in to fill the space the consumed fuel occupied. After about 10 or 15 minutes, the vacuum will become strong enough that fuel will stop flowing to the carburetor and the lawnmower will die.

What drains the battery on a riding lawn mower? ›

Your lawn mower battery could be draining from a number of causes such as loose, dirty, or corroded battery cables, electronic drain, or a bad battery. There could also be a faulty charging system, a failing voltage regulator, or other issues that are draining your lawn mower battery.

Do riding lawn mowers charge the battery while running? ›

Mowers are equipped with a battery that charges as the engine runs. If the battery has gone bad, it may not recharge at all, or may lose its charge very quickly. If this is the case, the battery will likely need to be replaced.

How do you fix a lawn mower that won't stay running? ›

How To Fix Lawn Mower That Wont Stay Running! - YouTube

How do you unclog a lawn mower carburetor? ›

How to Clean the Carburetor on a Lawn Mower - YouTube

Can a bad spark plug cause a mower to stall? ›

A bad spark plug often causes an engine cylinder to misfire or sound like it's struggling. The engine might even stall out completely while you are mowing. You may also notice that it becomes increasingly more difficult to restart the mower each time that it dies.

Why does my Craftsman riding mower start but stalls? ›

Your Craftsman Lawn Mower may start then die when your lawn mower is unable to regulate the air to fuel mixture required by the engine to form a combustion. This could be due to a dirty carburetor, bad fuel, plugged air filter, broken fuel pump, plugged fan or other components that can restrict fuel or air flow.

Why is my ride on lawn mower turning over but not starting? ›

Dirty Air Filter

An air filter that's not letting enough air into the motor can inhibit combustion. Locate the air filter on your mower and remove the plastic cover. If the filter is covered in dirt, grass, or some other contaminant, this may be the reason for your lawn mower turning over but not starting.

Why does my lawn mower stall when it gets hot? ›

A lawn mower that quits when hot is caused by a plugged air filter, a clogged mower deck, an incorrect engine oil level, a bad spark plug, a faulty ignition coil, old fuel or a plugged fuel cap. Before you begin working on your lawn mower, follow the safety instructions in your owner's manual to prevent injury.

Why does my lawn mower sound like it's going to stall? ›

Check the Air Filter

If it's dirty, the engine may be starved for air. Filters are either paper or foam. You can remove foam filters and clean them with soapy water, but you'll have to replace a dirty paper filter.

Can you clean carburetor without removing? ›

Use carburetor cleaner to remove deposits, clogs & debris

Deposits inside the carburetor can clog fuel and air passages and reduce performance or stop the engine altogether. Luckily, you can take care of many of these problems quickly and easily; often without even removing the carburetor from the engine.

How do I know if my lawn mower carburetor is bad? ›

How to Tell If Lawn Mower Carburetor is Bad (9 Symptoms)
  1. 2.1 Engine Won't Start.
  2. 2.2 Engine Doesn't Idle.
  3. 2.3 Jerky Engine & Back Firing.
  4. 2.4 Surging & Spluttering.
  5. 2.5 Engine Doesn't Accelerate.
  6. 2.6 Flooded Carburetor.
  7. 2.7 Black Smoke.
  8. 2.8 Excessive Fuel Consumption.

What are the symptoms of a bad spark plug in a lawn mower? ›

Checking Small Engine Spark Plugs

If you haven't turned on your engine recently, your mower won't start and/or you have to tug repeatedly on the rewind to start the engine, a damaged spark plug may be the culprit. These problems may also cause excessive fuel consumption, deposits on the cylinder head and oil dilution.

How do you know if you have a bad spark plug on a lawn mower? ›

How to Tell If a Lawn Mower Spark Plug is Bad? (4 Signs)
  1. 2.1 The Lawn Mower Will Not Start.
  2. 2.2 The Mower Takes More, Harder Pulls of the Cord to Start.
  3. 2.3 The Lawn Mower has a Rough Idle or is Lacking Power.
  4. 2.4 You are Refueling the Mower More than Usual.

Why does my riding mower keep dying? ›

The spark plugs are worn or damaged

If you find that your lawnmower keeps dying, or keeps stalling while cutting grass, then inspect the spark plugs. Look for signs of damage or wear. Something as simple as a cracked porcelain insulator can mean an electrode has been damaged or burned away.

Why would a riding lawn mower just stop running? ›

This sudden shutdown can be caused by an overheating engine. Reasons for an engine to overheat and shut down include debris clogging the area around the engine, low coolant levels, a problem with the oil, or an engine mechanical breakdown.

Why does my riding lawn mower only run on choke? ›

Working on the fuel and air supply end of things, if your lawn mower only runs with the choke on, there is probably a fuel delivery or carburetor problem. The main carburetor issues that cause this are air leaks, and clogging. Bad fuel or fuel with too high of an alcohol content can also require excessive choke use.

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