Petrol lawn mower servicing. How To Fix A Lawnmower: 5 Common Problems

How To Fix A Lawnmower: 5 Common Problems

Lawnmower won’t start? While some lawnmower problems are preventable, others are inevitable.

It is important to learn how the mower works and how to fix a lawnmower at home. Always consult the owner’s manual for any mower before attempting repairs at home. If the mower is under warranty, consult the manufacturer before trying to figure out how to fix a lawnmower at home.

Common Problems And Lawnmower Troubleshooting Tips

Fortunately, it is easy to learn small engine repair and basic lawnmower repair when it comes to simple issues. Most problems can be remedied with a few tools, replacement lawnmower parts, and patience. To save money, always use these lawn mower repair tips for fixing a lawnmower at home before running out to buy a new mower.

The Starter Rope Is Stuck Or Is Hard To Pull

This problem is usually caused by the engagement of the engine flywheel brake. Check to see if the flywheel brake is pressing against the handle before pulling the rope again. When the flywheel brake is not the issue and the problem persists, check the lawnmower blade.

A rope that is stuck or hard to pull may be caused by the blade dragging on the ground or by clippings getting stuck to the blade. To address this issue, place the mower on a hard surface. Make sure the engine is shut off and the spark plug wire is not engaged. Carefully clean the bottom side of the blade to remove any clippings or dirt, put the mower back into position and try pulling the cord again. If the problem persists, one or more lawnmower parts may not be functioning correctly and will need to be repaired. Consult the owner’s manual or search online for repair guides for the specific model and brand of mower.

The Lawnmower Loses Power While Moving

At some point in time, nearly every lawnmower owner will be pushing the mower along and suddenly hear it sputter as the engine stops.

  • One of the most common causes is a dirty filter. Use the owner’s manual to determine where the filter is. Remove the filter and clean it. If the filter is very dirty it may need to be replaced. This is one of the most inexpensive lawnmower parts to replace.
  • If the filter is not the issue, compare the height of the grass to the mower’s cutting height setting. If the grass is tall, adjust the cutting height accordingly.
  • Another way to fix lawn mower power issues is to clean the blade. Refer to the owner’s manual and use the manufacturers instructions to clean the mower blade.
  • If this does not fix the issue, check the spark plug. Many people are able to quickly repair their lawn mowers by cleaning or replacing a spark plug. Spark plugs are also affordable mower parts that are sold online or in home improvement stores.

The Lawnmower Starts Smoking

This is one of the most startling issues to encounter – most people assume that the engine is about to die or blow up. However, this problem is usually not very serious. The engine often smokes when the chamber that holds oil is too full. Check the chamber to see if this is the issue. Another problem may be a leak in the oil chamber. If the mower leans to one side while mowing on a slope, the oil may leak out onto the muffler and cause the smoking. When the mower’s engine is off and has cooled, inspect the oil chamber area for leaks. The issue may be that the cap is not on tight enough. If the part must be replaced, it may be easier to look for the part online than to search for it in stores.

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In rarer cases, the smoke may be a sign of a serious issue. If the smoke is white or very light in color and the mower does not run continuously, it is time to have a professional repair company look at the mower.

The Lawnmower Will Not Start

The first step in learning to repair lawn mower starting issues is to check the gas tank. An empty gas tank is the most common cause of a lawnmower not starting. Mower owners who are diligent about keeping their tanks full should still check the tank to see if there is a leak. If the tank is empty but should not be, inspect the outside of the tank for leaks. Replacement tanks can be found using an online lawnmower parts site.

Remember, in order to keep your fuel fresh if you’re going to be storing your lawnmower, use STA-BIL® Storage. It will keep your fuel fresh for 12 months and help protect the fuel tank from the effects of ethanol gas. Also, if there is a shut off valve for the gas lines, by all means, use it.

If the gas tank is not the issue because the mower runs on a battery, check the battery for signs of damage. Lawnmower batteries may also lose their ability to hold a charge as they age. Look for replacement lawnmower batteries if the battery needs to be replaced. Lawnmower batteries vary in price depending on the brand and model of mower.

Another important step in learning how to fix a lawnmower that will not start is checking the spark plugs. If they are dirty, clean them thoroughly. Reconnect them if they are loose. Old spark plugs should be replaced with new ones. If the fuel is not getting to the engine, knock on the carburetor’s side to help the gas flow again. If this does not fix lawn mower issues of this nature, look for a new fuel filter online.

The Lawnmower Loses Speed

When a lawnmower slows down considerably, the issue is usually a dislocated or damaged drive belt. This part is located in the motor casing. Consult the owner’s manual to verify the location. With the mower turned off, inspect the drive belt. If the belt is loose but not damaged, reattach it. If it is damaged, replacement belts are usually easy to find online from a lawnmower parts site. A new belt should repair lawn mower issues of this type. If the lawnmower runs on batteries, check the battery. Some lawnmower batteries may cause this issue if they malfunction, however, it is not common for lawnmower batteries to slow a mower’s speed.

How To Prevent Lawnmower Problems

Knowing how to repair a lawnmower at home saves time and money. The easiest way to avoid frequent problems is to maintain the mower. Follow these simple tips to keep the mower in good condition:

– Always use the correct type of replacement lawnmower parts. – Clean the blade regularly. Make sure to pull the plug so there is no chance that the blades can move while you’re cleaning them. – Oil any moving parts when needed according to the manufacturer’s instructions. – Change the oil as recommended. – Use the correct type of fuel. – Recharge lawnmower batteries according to instructions but avoid overcharging them. – Store the mower in a cool, dry and covered space when it is not in use. – Have the mower serviced as recommended by the manufacturer or warranty.

Lawn Garden

Lawn mowers are commonly used tools by both homeowners and landscapers. Whether a landscaping professional or a weekend warrior, performing routine maintenance on a lawn mower is important to keep it running smoothly and to extend the life of the machine.

Routine Mower Care

There may come a time when a lawn mower will have to be replaced. However, the following 10 routine maintenance steps will help extend the life of the mower. Taking these steps will also help owners avoid more expensive lawn mower repair projects in the future.

Step 1. Stabilize the Fuel

Fuel that sits in a mower for a long period of time can clog a carburetor. Operating a lawn mower often during the mowing season will prevent this from happening. However, if a mower goes more than 30 days at a time without being used, a fuel stabilizer needs to be added. A fuel stabilizer costs less than ten dollars at a local lawn and garden store. Adding a fuel stabilizer when preparing the mowing for storage in the off season, is also recommended. If not done, when mowing season starts again in the spring, people may have to pay to have the carburetor professionally cleaned.

Step 2. Change the Oil

Changing the oil in a lawn mower extends the life of the engine. The moving parts inside the engine undergo friction, which causes heat. Eventually, this heat causes parts to breakdown, so those parts must be lubricated with oil. Be sure to refill the oil reservoir to the designated mark on the dipstick. Remember too much oil can be just as bad for the engine as too little oil. Using a high grade oil will improve engine operation, lubrication, and fuel economy.

Step 3. Get a Reliable Battery

A freshly charged battery can improve the efficiency of lawn equipment. A mower needs a certain amount of voltage to power its lights, sensors, blades, starter, and coil.

Step 4. Keep the Deck Clean

Keep the area beneath the mower deck free of grass clippings to reduce rust buildup. Using water is good, but always remember to wipe the deck off after rinsing the mower. Use a blower or a bristled scrubber to remove buildup on hard-to-reach surfaces. Some people use a silicone spray to prevent future buildup on and under the deck.

Step 5. Replace the Spark Plugs

Spark plugs play a critical role in any engine as it relates to fuel combustion. An engine will not start without the proper amount of electricity from the spark plug. A spark plug needs replacing every 100 hours. If an engine runs roughly, there is a good chance that it might need replacing. Always check the owner’s manual for specifics on replacing spark plugs. The price of one spark plug can range from five to ten dollars, depending on the size of the equipment.

Step 6. Sharpen the Blades

Mower blades are critical when it comes to cutting grass. Remember to keep blades sharpened and balanced. When a mower has dull blades, the motor requires additional power to turn the blades. At that point the blades are not making a smooth cut. They tear off the end of the grass, causing the grass to cast a white appearance over a yard for a few days.

People should sharpen their blades often if they have fast-growing grass that requires frequent mowing. It is also wise to keep an extra set of blades available just in case they are needed. The cost of the blades is around thirty dollars, depending on the size of the equipment. For safety reasons, only use blades that are recommended for that particular model of lawn mower by the manufacturer.

Step 7. Check the Air Filter

Cleaning the air filter allows the engine to receive the proper amount of air it needs to get the optimal fuel to air ratio for successful combustion within the engine. As a mower cuts grass, small dust particles and grass clipping are attached to the air filter, along with the air that is needed for the engine to run. Clean the filter with a mild detergent or, if the filter is too worn to clean, replace it with a new one. Revisit the service manual to determine the recommended intervals for cleaning and replacement. The cost of an air filter is less than ten dollars, depending on the size of the equipment.

Step 8. Replace the Fuel Filter

Clean fuel is essential when it comes an engine running smoothly and efficiently. The fuel filter cleans all of the fuel that comes from the fuel tank to the engine. Particles from a gas container may fall in the fuel tank of the equipment. The filter will clean the fuel as it passes through, resulting in a much easier process of fuel delivery.

Smaller lawn equipment usually does not carry a fuel filter, but large- to medium-sized equipment typically comes with one to help with the filtration of the fuel. Regularly check and replace the fuel bulb primer on smaller equipment. Review the service manual to determine recommended intervals for cleaning and replacing filters and primer bulbs.

Step 9. Check Tire Pressure

Believe it or not, proper tire pressure can affect how level the grass is cut. If the tire pressure on a mower is low on one or more tires, it will make the deck cut the grass unevenly. Proper tire pressure makes the difference between a good ride on a mower or a bumpy one. Furthermore, pushing and pulling the unnecessary weight of flat tires will cause friction to be placed on the engine and transmission. Routinely check the air pressure and the condition of the tires.

Step 10. Service the Belts

Check for cracks and worn spots in the belts to eliminate any breakage and improper turning with the pulleys. If the equipment is used to cut a hill and the belts are worn, it will not have the power it needs to operate at full capacity. Also, belts function to turn the pulleys with the blades attached. If the belts are old with cracks, the equipment will not have the full power to cut the grass with ease.

Maintain Mower Care

Carefully follow all manufacturers’ instructions for routine repair in the lawn mower service manual. Following the service manual and these ten steps will help maintain a lawn mower for years to come. Visit the Alabama Extension Urban Lawn and Garden page for more information on urban landscaping.

Lawn Mower Repair The How to Guide to Fixing It Yourself

Despite care and maintenance, machines can suddenly develop a problem that needs to be fixed. Your lawn mower is a hard-working machine and sometimes that hard work results in damage that needs to be undone.

Knowing how to do minor repairs on your lawn equipment yourself can save you some time and money. With that in mind, we’ve created this guide on lawn mower repairs for you. To get your lawn mower serviced by experts, come to one of our John Deere dealership locations throughout Central and Southern Florida.

Starting Problems

If your mower isn’t starting or starts and stops, then you probably have a clogged carburetor. The most common way to end up with a clogged carburetor is to leave fuel in the mower when it’s not in use for a long time. The liquid parts of the fuel evaporate, leaving behind a sticky, gooey mess that clogs your carburetor and prevents the engine from starting. Use a carburetor cleaner to clean it thoroughly.

Another culprit behind starting issues in lawn equipment is a damaged spark plug. Check to see if it has any signs of wear or damage. Use a spark plug tester to check if it’s defective; if you don’t see a strong spark between the tester’s terminals then it’s time to replace the spark plug. If there is carbon buildup in the electrode, an electrode is damaged, or the porcelain insulator is cracked, replace the spark plug.

Battery Problems

If your lawn mower battery keeps dying on you, one or more cells in it may have died. Use a charger to charge the battery. If it doesn’t hold the charge, you need to get a new battery. Sometimes, though, it may be that other components are at fault, not your battery. Use a multimeter to check that the charger is giving proper voltage output. A multimeter will also let you check the alternator which recharges the battery and gives voltage to your mower when in use.

Blade Problems

If the blades on your lawn mower do not engage, you could have a problem with the PTO switch. A multimeter will let you check if the switch is damaged and needs to be replaced. If your switch is fine, the problem may lie in your PTO clutch. This clutch manually disconnects the engine from the blades. When the clutch solenoid is powered, it uses the drive belt to move the rotation of the mower blades. If there is anything wrong with the PTO clutch, it will need to be replaced as it can’t be repaired.

Gas Leak Problems

One common lawn mower repair involves gas leaks. To determine what you have to fix, you need to check where the leak is happening. If the bottom of the carburetor is leaking fuel, the carburetor bowl gasket might be missing or dried out. Replace this gasket. Another reason behind a gas leak could be the float needle not shutting off fuel. This needle opens and closes the float valve to allow fuel into the float bowl. If it’s damaged, the fuel will fill the carburetor until it overflows. Replace it if it’s damaged.

If neither of the above is the problem, examine the fuel shut-off valve. The fuel lines should be tightly affixed to the valve and shouldn’t have any cracks, tears or holes in them. If a fuel shut-off line or the fuel shut-off valve is leaking, replace it immediately. Do not attempt to patch or cut and rejoin a fuel line.

Overheating Problems

Overheating is another common issue that occurs in lawn mowers but it is easily avoidable with a little care. Your mower has an air-cooled engine with cooling fins fixed into the engine’s cylinder head and short block. These fins keep the engine cool while your mower is busy at work. Sometimes bits of grass, leaves, and debris can clog these fins so you need to clean your mower at proper intervals or after heavy use to ensure this doesn’t happen to your machine.

Smoking Problems

It can be scary to see your lawn mower start to expel thick black smoke but what this indicates is that your carburetor is ‘running rich’, i.e. it is getting too much fuel. Check to see if the carburetor float is jammed in the open position and fix it if it is. Another reason behind black smoke is the carburetor choke valve being closed. It needs to be open once the engine is running or the engine won’t get enough air to create the right fuel-air mix.

We hope this list helps you identify and perform common lawn mower repairs. If you can’t really tell what’s wrong with your mower or want to purchase quality lawn equipment, come to Everglades Equipment Group at one of our 17 locations in Florida. We’re always happy to whip old machines into good shape and help people choose the right machines for their needs. We are proud to serve the areas of Central and South Florida!

Maximize Your Mower: The Ultimate Guide To Petrol Lawn Mower Maintenance

Maintaining a petrol lawn mower is crucial to keeping it running smoothly and ensuring it lasts for a long time. Regular maintenance can also save you money in the long run by preventing costly repairs. Here are some tips to help you maintain your petrol lawn mower.

If you are looking for a new petrol lawn mower, check out our recommendations for the best petrol lawn mower If you can’t decide between a petrol lawn mower, or an electric one, check out our guide

Read the owner’s manual and familiarise yourself with your lawn mower

Maintaining and caring for a petrol lawn mower requires a thorough understanding of its operation and inner workings. A crucial yet often overlooked step is reading the owner’s manual and warranty information. Despite its importance, many people skip this simple task, even though it provides essential guidance on proper maintenance, operation, and troubleshooting.

The owner’s manual provides step-by-step instructions on how to operate your petrol lawn mower, including starting and stopping the engine, adjusting the cutting height, and engaging the blades. Furthermore, it contains valuable information on maintaining your mower, such as the frequency of oil and air filter changes and how to sharpen the blades. Familiarizing yourself with this information, though it may seem tedious, is necessary to ensure the longevity and efficiency of your mower.

Another crucial aspect covered in the manual is the type of fuel to use in your petrol lawn mower. With the introduction of E10 petrol, it is vital to determine whether your mower can handle this new fuel type. If your mower is older or the manual is unavailable, it is best to assume that you should use E5 or “super” grade petrol to avoid damaging the engine.

The warranty information included with your mower outlines the terms and conditions for keeping the warranty valid. Some manufacturers require annual servicing by a professional company, while others allow competent owners to maintain their mowers themselves. Neglecting the maintenance guidelines in your manual may affect your warranty coverage, so it is essential to read through it thoroughly before undertaking any servicing or tinkering.

Before resorting to online resources or attempting a one-size-fits-all approach to maintenance, consult the manufacturer’s manual. Each lawn mower has unique care requirements and making assumptions can result in more harm than good. By taking the time to read and study the owner’s manual and warranty information, you can operate your petrol lawn mower safely, correctly, and in accordance with the manufacturer’s recommendations. This diligence will not only prolong the life of your mower but also prevent unnecessary repairs and the potential voiding of warranty coverage.

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Store your fuel in proper containers and discard old fuel

Proper storage of fuel for your lawn mower is crucial for maintaining its effectiveness and lifespan. To ensure optimal fuel quality, always keep it in a sealed container, stored in a cool and dry place. Plastic containers are the preferred choice, as metal cans or tins tend to rust over time, decreasing fuel effectiveness and reducing its lifespan.

If you want to extend the life of new fuel, consider adding a fuel conditioner. This additive can prolong the fuel’s usability by up to two or three years. However, keep in mind that it is not possible to extend the life of old fuel, and attempting to do so would be a futile endeavour, wasting both time and money. By storing your fuel correctly and using additives when necessary, you will ensure the longevity and performance of your lawn mower.

Use the right fuel

Utilizing the appropriate fuel in your petrol lawn mower is crucial to guarantee its smooth and efficient operation. Following the manufacturer’s recommendations for the correct fuel type ensures optimal performance and helps prevent serious damage to the engine, which could lead to expensive repairs or the need for a replacement mower.

Most petrol lawn mowers require unleaded petrol with an octane rating of 87 or higher, as using petrol with a lower octane rating can cause the engine to knock or ping, potentially resulting in long-term damage. It is essential to note that some petrol lawn mowers may also require specific fuel types, such as E5 or “super” grade petrol. Always consult your owner’s manual or contact the manufacturer to determine the right fuel for your mower. Find out what the new E10 petrol means for your lawn mower.

In addition to selecting the proper fuel type, using clean, fresh fuel is equally important. Stale or contaminated fuel can lead to poor engine performance and reduced fuel efficiency. If you have doubts about your petrol’s quality, consider adding a fuel stabilizer to preserve its freshness and prevent degradation.

By consistently using the right fuel in your petrol lawn mower, as recommended by the manufacturer, you can ensure peak performance and avoid costly repairs in the future. Remember to check your owner’s manual and adhere to the guidelines for fuel type, and always use fresh petrol to maintain your mower’s optimal functionality and longevity.

Check the fuel and top up with fresh petrol

Proper fuel management is essential for maintaining your petrol lawn mower’s optimal performance and longevity. Each time you plan to use your mower, it’s crucial to check the fuel levels and ensure it has sufficient fuel for the task. If the mower needs a top-up, always use fresh fuel to avoid any issues with stale fuel that may have been stored for an extended period.

Fuel stored for longer than three months can become stale, losing some of its effectiveness. While it may still work, it won’t deliver optimal performance for your mower or your lawn. Stale fuel can lead to suboptimal cutting results and put unnecessary strain on your mower’s engine.

By handling fuel management correctly, such as using fresh fuel and keeping an eye on fuel levels, you can significantly extend the life of your petrol lawn mower. This proactive approach will help ensure that your mower continues to operate efficiently and effectively, providing you with a well-maintained lawn for years to come.

Regularly check the oil and change it as necessary

Regularly checking and maintaining the oil level in your petrol lawn mower is a crucial step in ensuring smooth and efficient operation. Before each use, check the oil level using the mower’s dipstick, and add more oil if necessary. This helps prevent the engine from overheating and ensures proper lubrication. It is essential to check the oil level regularly and change the oil every 50 hours of use or at least once a year. Over time, oil can become contaminated with dirt and debris, reducing its effectiveness in protecting the engine. Running your mower with low or dirty oil can cause serious damage, leading to costly repairs or the need for a new mower.

To check the oil level, pull out the dipstick, wipe it with a clean cloth, and reinsert it. Then, pull it out again and ensure that the oil residue is within the minimum and maximum marks. If the oil level is insufficient, refill it to the required amount. The oil level should be checked at the start of the season and at regular intervals throughout the year. This helps to keep all moving parts in the engine well lubricated and prevents overheating.

Different oil change intervals are recommended depending on the mower’s usage and age. Refer to your mower’s instruction manual for specific information about what oil the engine needs and the intervals at which it must be changed.

Changing the oil in your petrol lawn mower is a relatively simple process. Locate the oil drain plug and remove it to drain the old oil into a container. If your mower doesn’t have a drain plug, carefully tilt the machine to one side and drain the used oil via the fill hole or use a siphoning syringe. Be sure to responsibly dispose of the old oil according to local regulations.

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Once the old oil has been removed, replace it with quality oil according to the manufacturer’s recommendations. Use a funnel to accurately pour the new oil in, and check the oil level with the dipstick. Regular oil changes will help prolong the life of your petrol lawn mower and ensure optimal performance. By checking the oil level frequently and changing it as needed, you can keep your mower running smoothly for years to come.

Check, clean and/or replace the air filter

Maintaining a clean and functional air filter is crucial for the optimal performance of your petrol lawn mower. The air filter is responsible for preventing dust, debris, and other particles from entering the engine and carburettor, ensuring the smooth operation of your mower. Neglecting this vital component can lead to reduced fuel efficiency, increased maintenance costs, and even engine damage.

To keep your petrol lawn mower running efficiently, it is essential to clean or replace the air filter at least once a season or after every 25 hours of use. This regular maintenance ensures that the engine receives the proper airflow it needs to function effectively. In fact, a dirty air filter can decrease your lawn mower’s efficiency by up to 25 percent, which translates to increased time, money, and effort spent on maintenance and fuel costs.

Cleaning or replacing your lawn mower’s air filter is a simple process that you can perform yourself. If your mower has a foam air filter, it can be removed and washed in warm, soapy water. Once dry, reinsert it into the mower. If your mower has a paper air filter, simply replace it with a new one. Some manufacturers require specific air filter models, so be sure to consult your mower’s user manual for the appropriate replacement type.

In addition to replacing the air filter, cleaning the housing that holds the filter is important. This ensures that no residual debris or dust will come into contact with the engine, further protecting its performance. When removing the air filter, clean the housing thoroughly before installing the new or cleaned filter.

Air filters are relatively inexpensive and easy to obtain from your local hardware store or garden centre. By investing in this simple maintenance task, you can prolong the life of your mower and ensure optimal performance throughout its lifespan.

Check and sharpen the blades as necessary

Maintaining sharp blades on your petrol lawn mower is a critical aspect of proper maintenance that should never be overlooked. Dull blades can not only reduce fuel efficiency and cause potential damage to the engine but also negatively impact the health and appearance of your lawn. A sharp blade will cleanly slice through the grass, while a dull one will tear and hack at it, leaving an uneven, ragged cut that makes your lawn more susceptible to diseases and pests.

Sharpening your mower blades at least once a year is recommended to ensure optimal performance. However, if you mow your lawn frequently or encounter rough terrain, you may need to sharpen the blades more often. A useful guideline is to check the blades before each mowing session to guarantee they are sharp and free from damage.

There are several methods to sharpen your petrol lawn mower blades, including using a sharpening stone, a file, or a bench grinder. Regardless of your chosen technique, always follow the manufacturer’s instructions to avoid any damage to the blades or the mower itself. If you are unsure about sharpening the blades, consider taking your mower to a professional for sharpening.

Removing the mower blades is typically a straightforward process. Most petrol mowers have a central bolt that can be undone to remove the blade safely. Remember to wear heavy-duty gloves when handling the blade to protect yourself from potential injuries.

In some cases, your blades may be beyond sharpening and require replacement. If they are severely damaged or have been in use for an extended period, it is best to install new ones. Always refer to the manufacturer’s guide when purchasing replacement blades to ensure you select the appropriate model for your mower.

Check and clean or replace the spark plug

The spark plug in your petrol lawn mower plays a crucial role in igniting the fuel in the engine, allowing it to start and run smoothly. Over time, the spark plug can become dirty or worn, causing the engine to misfire or fail to start altogether. A clean spark plug ensures quick starting, smooth running and prevents stalling and overheating. Ideally, it should be replaced annually to maintain optimal performance.

To ensure your petrol lawn mower is running at its best, check the spark plug at least once a year, ideally when performing other maintenance tasks such as changing the oil or air filter. To do this, first, disconnect the spark plug wire and then unscrew the spark plug from the engine. Inspect the tip of the spark plug for any signs of wear or damage, such as cracks or blackened deposits. Slight discolourations of the electrodes can be removed with a simple wire brush. However, if the spark plug is black or even completely oily, there is a defect in the system that must be repaired urgently.

If the spark plug is dirty or worn, it’s time to replace it with a new one. When purchasing a new spark plug, always ensure that the type designation is correct, which can be found on the ceramic body. Replacing the spark plug is a simple process that you can do yourself. Simply screw the new spark plug into the engine and reattach the spark plug wire. Tighten the spark plug securely but not too tightly, as this can damage the engine. Adding some oil around the thread of the plug will make for easy removal next time.

By regularly checking and replacing the spark plug as needed, you can ensure that your petrol lawn mower starts and runs smoothly every time. This simple maintenance task can save you time and hassle in the long run, and help prolong the life of your mower. Remember, before undergoing any maintenance yourself, always disconnect the spark plugs to remove the risk of the mower accidentally starting, ensuring you can work on it safely.

Check the starter rope/cord

One aspect of lawn mower maintenance that requires attention is the starter rope, as it is subjected to significant wear and tear over time. The repeated tugging of the starter cord can cause it to become brittle, fray, or even break off completely. If you notice that the rope is no longer in good condition, it is essential to replace it immediately, as repairing it is usually not possible.

Thankfully, replacing the starter rope is neither a difficult nor time-consuming task. To do so, you’ll need to remove the housing and then replace the old cord inside the pulley system with a new one. While installing the new cord, be careful not to turn the pulley. Once the new cord is in place, wrap it around the pulley a couple of times without spinning the pulley. After completing these steps, test the new starter rope to evaluate its performance.

Regularly inspect your lawn mower

Regularly inspecting your petrol lawn mower is a crucial aspect of maintenance that ensures safe and efficient operation. By taking the time to inspect your mower, you can identify potential problems before they become serious, saving you time, money, and hassle in the long run.

Before each use, take a few seconds to give your lawn mower a quick once-over. Check for loose or damaged parts, such as bolts, screws, worn or damaged belts, or broken and cracked components. Make sure all of the bolts and screws are tight and in place, as they can become loose over time due to the mower’s vibrations. If you find any loose parts, tighten them before your next mowing session. If any parts are missing, replace them before cutting your lawn again to prevent further damage or potential safety hazards.

How to Fix a Petrol Lawnmower that Won’t Start

Servicing your mower at the start of a new gardening season is an excellent opportunity to ensure all nuts, bolts, and other parts are secure. This is not only a safe practice but also helps prevent any significant performance issues. Pay particular attention to the mower’s wheels, as they bear the brunt of the work and may become loose over time. Make sure all wheels are fixed and tightened accordingly.

In addition to checking for loose or damaged parts, it’s essential to inspect the blades and undercarriage for any debris or buildup. Grass clippings and other debris can get stuck in the blades or undercarriage, reducing the mower’s performance and potentially causing it to overheat. Remove any debris or buildup before using the mower to ensure optimal efficiency.

By inspecting your petrol lawn mower and addressing any issues before they escalate, you can maintain your mower’s performance and safeguard your health and safety while mowing.

Clean under the mower deck

Grass build-up and debris accumulation in the undercarriage of your lawn mower is inevitable and can affect its normal operation. If left unattended, grass clippings can clog the discharge chute, while shrubbery and other garden debris can impede the blades and decking. To maintain optimal performance, it is essential to clean the undercarriage regularly and remove debris lodged within the mower.

Scrape grass clippings and soil from the undercarriage using a wire brush, and employ a garden hose to spray away any stubborn residue. Some mowers even feature an attachment where you can connect a hose to rinse the underside of the mower deck. This cleaning process should be part of your regular mower maintenance, as it helps prevent rust on steel parts and keeps the mower functioning smoothly.

The best time to remove debris is immediately after mowing, as the grass will still be moist and easier to remove. Allowing grass and debris to harden only makes it more difficult to dislodge. Be aware that unremoved debris can clog your mower, potentially preventing it from starting, and may also cause it to overheat by blocking airflow.

When cleaning the undercarriage, ensure the air filter is facing upwards to prevent dirt and oil from entering it. Additionally, always disconnect the spark plug before cleaning, as there is a risk of accidentally starting the engine and activating the spinning blade, which poses a significant danger. Simply unclick the coil from the spark plug, and it will pull off easily.

How to Service a Petrol Lawnmower

It is crucial to consult the manufacturer’s manual before tipping your mower on its side, as doing so could damage the mower due to fuel or oil leakage into the engine. By diligently cleaning your lawn mower’s undercarriage and removing debris, you will prolong its life and maintain optimal performance.

Drain the fuel

Preparing your petrol lawn mower for winter or extended storage involves several crucial steps, one of which is draining the fuel tank to avert any engine damage. Stale fuel can impede engine performance and harm the carburettor, potentially leading to expensive repairs or even necessitating a new mower.

To drain the fuel tank, run the engine until it consumes all the fuel, ensuring that no residual fuel remains in the tank or carburettor to cause damage. Alternatively, employing a siphon or pump can effectively remove the fuel from the tank. Proper disposal of the drained fuel is essential. Running the engine for a few minutes after draining the fuel ensures that any leftover fuel in the carburettor is burned off, preventing the residual fuel from causing engine damage.

Lawnmower experts emphasize the role of old petrol in causing startup issues and recommend draining any remaining petrol at the end of each mowing season. Some experts even advocate draining the petrol tank after every use or every second cut, highlighting the importance of regularly draining the tank and using fresh fuel to maintain optimal mower performance. Old fuel is the leading cause of misfires and startup problems.

As old fuel loses its ignitability and can clump together in winter, it is crucial to empty the lawn mower’s fuel tank before the season and refill it with fresh fuel in spring. If you neglected to empty the tank over winter, it is safer to do so now and replenish it with fresh fuel. Remember that petrol has a lifespan of around 30 days, after which it risks going stale and causing long-term engine damage. Draining your petrol is a vital practice to protect your engine and extend your mower’s life.

In addition to draining the fuel tank, cleaning the carburettor and fuel lines is also recommended for extended storage, as it helps remove any debris or residue that could cause problems when restarting the mower.

Check and clean the carburettor and primer

As part of your lawn mower maintenance, it is essential to examine the carburettor, particularly if you have not already cleaned it during the winter. Inspect whether cleaning is necessary, and pay attention to the primer, which is often located nearby on many models. The primer serves as a manually operated fuel pump, filling the carburettor with fresh fuel in just a few strokes. This feature proves especially useful if the carburettor has been run empty or has emptied over the winter. Be sure to also verify the functionality of the primer by performing a few pump strokes.

Properly store your lawn mower when not in use

Proper storage of your petrol lawn mower plays a significant role in its maintenance, ensuring it remains in good condition and prolonging its lifespan for years to come. After you have finished using your mower, it is crucial to store it in a dry, sheltered location, protecting it from the elements and potential damage.

The ideal storage solution for your lawn mower is a garage or shed, where it is safeguarded from rain, wind, and other weather conditions that can negatively impact its performance and longevity. If you do not have access to a garage or shed, an alternative option is to use a lawn mower cover. This protective cover will shield your mower from dust, debris, and other environmental factors, ensuring that it remains in optimal condition for your future lawn care needs.


How often should I change the oil in my petrol lawn mower?

You should change the oil every 50 hours of use or at least once a year.


If your mower isn’t cutting it, we can help!

Call or visit your favorite Frattallone’s location for details or to schedule an appointment to get going again. All plus tax.

Services Include:

  • Blade Sharpening: – 10 off machine – 25 on machine
  • Carburetor Cleaning: – 56 plus parts without tune-up – 30 plus parts with tune-up
  • Recoil Repair: 35 plus parts
  • Tune-Up: 89.99 plus parts
  • Off-Season Storage: FREE with tune-up

Free Off-Season Lawn Mower Storage with purchase of a tune-up

Services Include:

  • New Spark Plug
  • Oil Change
  • Inspect Adjust: Recoil, Electrical, Safety, Propulsion Systems, Carburetor, Cables
  • Lubricate Drive Systems
  • Clean Fuel Tank
  • FREE Winter Storage

Best Mechanics in Minnesota

Work will be performed for the items on the checklist needing repair as determined by our certified mechanics. We will contact you if the estimated cost of repairing your unit exceeds 150 before proceeding. If carb repair is required, expect 15-30 for parts and 30 for labor to be added to the average cost of repairs; this is typically required when a unit won’t start. The scraper will be replaced when excessive wear poses risk; expect 15-25 to be added to the average cost of repair. If the skid shoes will be replaced due to excessive wear, expect the average cost to increase by 20-30. The cost of repairing your unit may exceed the value of the unit; in such cases, if you choose not to continue the service, you can have your unit recycled for no additional charge. If you decide to replace the unit at Frattallone’s, a 15 credit will be applied to the new purchase. If you decide to have the unit sent back unrepaired, 30 deposit covers the inspection/diagnostics from the mechanic.