Electric and petrol lawn mowers repair with your own hands.
Repair of electric and gasoline lawnmowers with their own hands.
Causes of malfunctions. Uncomplicated repair with their own hands.
Lawns and meadow lawns not only need to be shaped, but also regularly maintained. But you can’t do it without a good quality mower, which you probably already bought. It does not matter if it is a Honda, Bosch, Mtd, Husqvarna, VIKING or Oleo-Mac. The main thing is to know how to properly maintain it in working order, and if necessary to carry out the repair of the lawnmower engine either independently or by surrendering to the company service center.
So, let’s find out how to determine that your mower requires repair.
1) The lawn mower starts to make a noise, rattling or a banging noise when it is operating. All of these sounds indicate that the bolts in the unit’s engine have been loosened. If there is nothing wrong with the bolts, it could be a loose fixation of the housing. To carry out repairs with your own hands, lawnmowers are checked for unacceptable backlash of each bolt connection. If you find play, use the right tool and tighten the screws firmly. Don’t worry. All gasoline lawnmowers vibrate while working, and the reason of the loosening of the bolts is the working vibration. Check connections regularly and you won’t have any problems.
2) Mower starts to vibrate more when working and can sometimes make sudden, uncontrollable movements. This problem is also not uncommon. It is either a damaged blade on your mower or a loose cutting mechanism on the motor shaft. The second cause can be fixed by similarly tightening the screws. But if the mowing blades are damaged they will have to be completely replaced as they are beyond repair as a rule.
3) Mower starts making a whistling noise when it works. The occurrence of a specific whistling is associated with a foreign object in the device, which blocks the roller in the aerator. To eliminate such a malfunction and make repairs to the lawnmower, you need to disconnect the blocked roller, and then remove the foreign object that got there.
4) If the mower started cutting the grass too unevenly, the reason may be quite trivial. Your cutting blades are simply blunt! There are two ways to remedy the situation. You’ll either have to sharpen the mowing blades or completely replace them with new ones. The second option is more expensive, but also more preferable.
5) If the lawnmower has front-wheel drive, over time it may start to stop unintentionally. The cause is an excessively worn drive belt, which can be replaced without much trouble. Repair of gasoline lawnmowers is even easier if the clutch cable is stretched, leading to similar problems. In this case you just need to adjust it.
6) The lawnmower‘s engine stops right after starting. This is caused by a stuck crankshaft or piston or a lack of oil in the crater. In this case, you need to check the oil level, or start the jammed parts manually. Although, according to many experts, with their own hands such a repair of electric lawnmowers or gasoline lawnmowers is very difficult to do, as a result, it is better to turn to professional masters.
7) If the engine of the equipment does not start, then the fault at a glance is quite problematic to figure out. In most cases, you will need skilled intervention of specialists of the service center. But, in principle, you can check something yourself. For example, it can be a banal lack of gasoline, or the spark plug is out of order. Replace the spark plug, refuel the unit, and if the engine still won’t start, then call a specialist.
Read more about the features of electric and gasoline lawn mowers:
How the gasoline mower is designed?
The basis of any apparatus of this type is made up:
- Powerful frame;
- Mounted on the frame of a four-stroke gasoline engine;
- Deck with a cutting blade, which is directly or via a friction drive connected to the motor shaft;
- The chassis, that is, the wheels attached to the frame through a shaft with bearings, including sliding (bushing-shaft) or with bolts;
- Transmission (only on self-propelled units);
- Folding handle with control elements mounted on it.
The frame is the backbone of any lawnmower, as it is to it that the engine and other elements are attached. On some models, the frame is one piece with the deck.
The main elements for making the frame are:
The steel frame is very strong, making it suitable for use in the harshest environments. However, it is very vulnerable to corrosion, which occurs when the frame is exposed to water and various substances that occur during mowing or decomposition caused by poor cleaning of the machine after work.
The paint coating (LKP) protects the frame from aggressive substances, but the reliability of such protection is directly dependent on the cost of the unit, because only for the painting of expensive models use the most reliable powder dyes.
Aluminum frame doesn’t have these disadvantages, because aluminum is inert to water and weak acids, but it is much more expensive to produce because of the higher cost of the starting material. The paintwork of such a frame performs only decorative functions.
Plastic frames are very cheap and, like aluminum frames, are not afraid of water or acids, but their mechanical strength is ten times less than aluminum or steel counterparts, so machines with a plastic frame can be used only for regular mowing of lawns.
Any attempt to mow tall grass or weeds with them, as well as the impact of the blade on an unexpected obstacle will lead to cracking of the plastic, which over time, the entire structure will begin to vibrate, and then may fall apart.
Lawn mowers are equipped with four-stroke gasoline engines of different capacities, but the general device of these engines is the same.
At the bottom is the oil pan (crankcase), which contains the oil reserve and where it drains after lubrication of all engine elements.
Above the crankcase are the engine block and crankshaft with slide bearing and connecting rod, with the shaft running through the crankcase through quality oil seals to prevent oil leakage.
On the side of the block there is a combustion chamber, that is a cylinder and piston with piston rings, as well as a cooling radiator that removes excess heat from this element. There is an engine head on the side of the combustion chamber that houses the camshaft and valves.
Crankshaft and camshaft are connected by a chain gear with gears of different size, so that in 2 revolutions of the crankshaft the camshaft is rotated only 1 time.
The following units are connected to the crankshaft:
- Manual or electric starter;
- Sensors of the ignition system;
- Friction or adapter sleeve to protect the shaft from deformation when the blades stop suddenly.
The power of the engine depends on three parameters:
Cylinder diameter and piston stroke form the volume of the combustion chamber, so some manufacturers do not specify power in horsepower (l. С.) or kilowatts (kW), and volume in cc (cm3 ).
By reducing cylinder diameter but increasing piston stroke, the manufacturer preserves engine volume and thus increases power, but the price for this increase is a sharp increase in stress on valves and rings.
It is hard to identify the most vulnerable part of an engine, because valves and rings are damaged by overloading, and the crankshaft plain bearing (pins) and the contact points of the piston and the cylinder are the most severely affected by bad oil or untimely oil changes.
The main task of the blade is not only to prevent the grass from scattering in different directions, but also to create conditions for the rotating blade to twist the air in such a way that it lifts the lapped grass, making it easier to cut.
The deck is made from the same materials as the frame; on some models both parts form a single unit.
When you cut the grass the blade rotates with an enormous speed, so it not only cuts the vegetation, but also scatters both the shredded green mass, including plant sap, and small stones or soil, if the blade meets them.
The green mass during mowing does not harm even the steel deck, but after mowing, if this part is not washed well, in the green mass begins the processes of rotting caused by various bacteria.
We have already talked in detail about the activity of these micro-organisms (Bacteria), and the products they produce. Organic acids released by bacteria very slowly corrode the paintwork that protects the steel deck, and when the paintwork is damaged, it causes corrosion of the metal, resulting in rust.
Most lawn mowers are equipped with special nozzles, through which the deck washed with a jet of water, but if such a nozzle, then the mower will have to turn and wash with a hose of water. Because in addition to the corrosive effect, green matter adhered to the inner walls of the deck worsens the creation of vortexes, raising the grass in the area of the blade, which leads to a sharp drop in the quality of mowing.
Chassis vary both in the number of wheels and the way they are attached.
Where can I get my petrol lawnmower repaired?
Lawnmowers must run continuously. Unstable motor operation is a sign of a dirty engine, improper maintenance or carburetor problems that need to be corrected. Before sending your mower to a repair shop, you should take a few troubleshooting steps to try to solve the problem yourself. Some repairs, however, are best left to a certified repair technician. If the carburetor is not properly adjusted, the gears will wear out quickly, potentially damaging the engine.
How To Service Your Lawn Mower
Unscrew the gas tank cap and check the fuel level. If the fuel level is low, you may experience malfunctions. Change the gasoline immediately if it shows signs of water.
Remove the screw holding the air filter cover to the body, or press on the latches to remove the cover. Replace the dirty paper filter or wash the element with soap and water.
Unscrew the spark plug from the engine with a wrench. Inspect the spark plug ends for signs of fouling. Check the spark plug gap with a special dipstick available at most hardware stores. Compare the gap measurements with the recommended spark plug gap in the mower operator’s manual.
Take your mower to a professional to adjust the carburetor.
Check that the air damper knob is set to the “quick” or operating position.
Check the throttle cable from the throttle grip to the engine. Make sure it is attached to the throttle on the engine. Tighten the screw that secures the cable in place.
We unscrew clamps on the fuel line that goes from the tank and fuel filter. Remove contaminants. Blow out the hose with compressed air and reinstall.
Where can I get my gasoline lawnmower repaired?
Home Equipment, Manufacturing Where to Repair a Lawn Mower?
All of us use lawnmowers to mow our lawns, no matter how large or small the area. As the advantage of their operation is based on reliability, availability, versatility, simplicity and ease of handling. However, few people remember that the “reliability” of the technique is provided not only by the quality of the equipment of a particular manufacturer, but also by proper care, timely performed maintenance, use of original spare parts.
Have your mower serviced by an authorized service center. The certified representatives of certain brands represent an area where only the skilled craftsmen work, so the quality and speed of service is at the highest level. Thanks to the specialists you can not worry about the correctness of maintenance of any brand of equipment: Echo, Stiga, VIKING, Makita, Husqvarna, BlackDecker
Turning to the specialized service center the customer can be sure of the correspondence and availability of the spare parts, that means that it is possible to carry out preventive lawn mower repair, warranty or post-warranty maintenance without any fear. Therefore, the question of “Where to repair the lawn mower?”A responsible approach is necessary. You should only trust highly qualified and proven professionals.
However, before choosing a service center, you should know and understand where you purchase your equipment. No hypermarket management or bazaar vendor will give you a list of authorized service centers. Therefore, you should go only to specialized stores, and before buying, you should ask the seller about the cherished list. Remember ? “Who knows, he is armed.”.
In addition, you should choose a lawn mower from reputable manufacturers. No service center will be able to repair the mower from a manufacturer they have never heard of. After all, each brand has its own design features.
Top Reasons Lawn Mower Not Starting — Lawn Mower Troubleshooting
Some may say that why look for a service center, if there is always a possibility to repair the lawnmower yourself or give it to “tearing” in the hands of a private master. But this is a misconception, because neither you nor a private mechanic has access to original spare parts. Installation of completely different parts can lead to a serious breakdown, as a result of which you will still have to turn to qualified professionals. “The miser pays twice.”. If you do, you could lose your right to warranty service.
Do not forget that specialized stores cooperate with authorized service centers not only for the sake of providing additional services, they are also responsible for the quality of products sold.
Where can I get my petrol lawnmower repaired?
Lawn mowers must run smoothly. Unstable engine running is a sign of a dirty engine, improper maintenance or a carburetor that needs adjusting. Before sending your mower to a repair shop, there are several troubleshooting steps you should take to try to resolve the problem yourself. Some repairs, however, are best entrusted to a certified repair technician. If the carburetor is not properly adjusted, the gears will wear out quickly and this could potentially damage the mower’s engine.
Unscrew petrol tank cap and check fuel level. If the fuel level is low, the mower may not run smoothly. Change the gasoline immediately if it shows signs of water.
Remove the screw holding the air filter cover to the housing or press the latches to remove the cover. Replace dirty paper filter or wash element with soap and water.
Unscrew the spark plug from the engine with a wrench. Inspect the spark plug ends for signs of fouling. Check the spark plug gap with a spark plug gauge available at most hardware stores. Compare the gap measurement with the recommended spark plug gap in the mower operator’s manual.
Take your mower to a professional to adjust the carburetor.
Check that the air damper knob is set to the “quick” or operating position.
Check the throttle cable leading from the throttle grip to the engine. Make sure it is attached to the throttle on the engine. Tighten the screw that secures the cable in place.
Loosen the clamps on the fuel line that leads from the gas tank and fuel filter. Remove contaminants. Blow out the hose with compressed air and reinstall.
Repair of lawn mower mechanics
We distinguish between mechanical and electrical causes of failure. The mechanical ones include:
- Breakage and bending of the blade. This defect is visible even with the naked eye. In this case, the grass is mowed unevenly, and the mower can simply stop abruptly. To repair the mower, you just need to bend it back into its original position. If one part has completely broken off, you will need to disassemble the device and replace the cutting part. If the sharpness is lost, it is necessary to sharpen it with a file or abrasive tape.
- Loose bolt fasteners. If you hear whistling and a loud banging or rattling sound, the connection is loose. To fix this problem, you’ll need to unplug the unit, use a special wrench to tighten all the bolts and nuts firmly.
- The drive belt for the lawnmower is stretched or broken. It will be necessary to unscrew the fasteners a little, and then move the pulley and take out the failed part. A new belt for the lawnmower should first be installed on the small and then the large pulley, after which the gear returns to its original position. You will need to check the tension of the belt, the deflection of which should be less than 4mm.
- A common problem with drive mowers is a cable strain. In this case, it must be carefully adjusted.
- Clogged air duct. The mower may malfunction if grass clogs the grass catcher box. You need to stop the machine, clean it and turn it on again.
It often happens that the line for the lawnmower trimmer is torn or runs out. For some people, this problem is quite significant, and they are interested in more experienced people, how to wind the line for a trimmer on the lawnmower. The process is really not complicated, and will take no more than 15 minutes. Grass trimmer reel is a plastic body, inside which there is a cassette and a hook for easy reeling of fishing line. To remove the spool of fishing line, you need to turn the central screw clockwise, then disassemble the head with a screwdriver and take out the spool. Then you need to measure the necessary length of fishing line and, having folded it in half, wind it on the spool, and the ends lead out against each other. At the end it is necessary to reassemble the head to its original state. As you can see, tucking the line for the trimmer into the lawnmower is not at all difficult.
Also, the work of the lawnmower can be stopped due to a foreign object getting inside. In this case, a strong whistling and rattling may appear. To solve this problem, simply pull the foreign object out of the device. Sometimes this causes the impeller blades to break. In this case there is a risk of motor overheating, so you need to urgently replace the broken part.
Important! To repair lawn mowers with special tools and skills is better to trust a professional. On your own in case of a complicated breakdown, you can break the machine permanently
Wheeled mowers have only floating blades. For this reason, the technique is completed with less powerful engines. As a result, wheeled gasoline lawn mowers are the quietest, which is important for small areas where the lawns are close to the neighbors’ houses. You will have to move the equipment using your own physical strength. These models are not suitable for uneven terrain. Self-propelled have a higher price, but the work with the technique does not require large physical expenses.
After work, blades and deck should be cleaned of grass. Blades are inspected and periodically sharpened (1-2 times per season). In line models, the cutting tool is changed at this interval. Replace fuel filter once a year. Periodically check the oil level and top up if the level is low. All maintenance works should be done with the engine turned off.
Gasoline and oil drain out of turned over equipment. Lack of oil caps may cause oil to leak into the combustion chamber. This will cause the engine to malfunction. To service the machine in an upright position or tilt it as instructed in the operator’s manual.
Initial Inspection and Troubleshooting
There is an algorithm that helps in most cases to identify the reason why the lawnmower does not work. We will consider the actions that can be performed at home.
- After disassembling the engine, pay attention to the condenser. You can suspect a problem with it, if the lawnmower is not able to provide stable operation at idle speed. This indicates that the condenser may have blown or oxidized.
- Take time to inspect the electric motor winding. There may be burned segments on it, or the winding integrity may be compromised.
- Examine the start button for proper operation. You can do this with a tester. It can be replaced with an inexpensive screwdriver.
- Inspect the power cord and plug, and the extension cord you use to connect the mower to the mains. If there is likely to be mechanical damage.
- Check whether the voltage in your home power supply system is adequate for your gardening equipment: maybe it is too high or too low. If necessary, use voltage regulating equipment.
Repair mechanical mowers if cutting elements are dull or damaged. In this case, experts recommend dismantling the detachable blades yourself. Use an emery cloth for sharpening. In cordless models, the battery is replaced if necessary.
Before repairing a lawn mower, the type of motor is determined:
- Electric. The motor is powered by current. Machine shuts down due to overheating or overload. Some models do not have overheat protection. If the engine is mechanically damaged, you need professional help.
- Gasoline. The device fails as a result of overheating, overloading, breakage of the oil and fuel supply circuit. Gasoline mowers, unlike electric models, take longer to repair.
To keep the lawnmower in good working order, it is recommended to follow the correct rules.