Continuous use of lawn mowers leads to wear of some parts, as well as breakdowns. This usually happens at the most inopportune moment. How to repair your lawn mower yourself? In what cases can the situation be corrected on your own, and when you need the help of a specialist?

Repair of the mechanical part of the lawn mower

Distinguish between mechanical and electrical causes of failure of the device. Mechanical include:

  • Breakage and bending of the knife. This defect is visible even with the naked eye. The grass is mowed unevenly, and the mower may simply stop abruptly. To repair the mower, you just need to bend it back to its original position. If one of the parts is completely broken off, then you will need to disassemble the device and replace the cutting part. If the sharpness is lost, sharpening must be carried out with a file or an abrasive belt.
  • Loose bolts. The appearance of a whistle, as well as strong vibration and rattling, indicates a loose connection. To eliminate this problem, you will need to unplug the device from the outlet, using a special wrench, tighten all bolts and nuts firmly.
  • The lawn mower drive belt is stretched or broken. You will need to unscrew the fasteners a little, and then move the pulley and remove the failed part. A new mower belt should first be installed on the small pulley and then on the large pulley, after which the gear returns to its original position. It will be necessary to check the belt tension, the deflection of which should be less than 4 mm.
  • A common problem with a powered mower is cable strain. In this case, you need to carefully adjust it.
  • Clogged air duct. The mower may stall if the grass clogs the grass feed compartment in the container. It is necessary to stop the device, clean it and turn it on again.

Lawn mower repair

It often happens that the lawn mower line breaks or runs out. For some, this problem is quite significant, and they ask more experienced people how to wind the line on the lawn mower. The process is actually not complicated and will take no more than 15 minutes. The trimmer reel is a plastic case, inside of which there is a cassette and a hook for easy winding of the line. To remove the spool with line, you need to turn the central screw clockwise, then disassemble the head with a screwdriver and remove the spool. Then you need to measure the required length of the fishing line and, folding it in half, wind it on a reel, and bring the ends against each other. Finally, you need to reassemble the head in its original state. As you can see, it is not at all difficult to fill the line into the lawn mower.

Also, the mower may stop working if a foreign object gets inside. In this case, severe whistling and rattling sounds may occur. To solve this problem, simply remove the foreign object from the device. This sometimes leads to breakage of the impeller blades. In this case, there is a risk of overheating of the motor, so an urgent need to replace the broken part.

Important! It is better to entrust the repair of lawn mowers using special tools and skills to a professional. Independently with a complex breakdown, you can completely break the unit.

DIY electric lawn mower repair

Lawn Mower Honda

Most often, mower owners are faced with the problem of contact oxidation. The appearance of a layer of scale on the terminals is associated with high humidity in the storage area of ​​the device. You can solve this problem yourself by simply clearing the contacts.

If the device consists of a brush motor, then it should be borne in mind that they can wear out quickly, which leads to a lack of contact. Therefore, you need to go to the shops that service the lawn mower and purchase a repair kit with the necessary parts in advance.

Quite often, the device for mowing grass breaks down or stalls from the slightest load with strong pollution. So, it is important to clean or change the air filter for the lawn mower once every 3 months.

Air filter

Repair of brushcutters with an asynchronous motor, which is out of order due to the failure of phase-shifting capacitors, is best done by specialists. Usually, it is not always possible to identify such a breakdown on your own. Although some signs may signal this:

  • the engine hums a lot;
  • at the moment of start, the body of the device twitches strongly;
  • even after several minutes of operation, the motor becomes very hot;
  • there is a decrease in speed.

Important! If the device starts to smoke and a strong burning smell appears, this may indicate that the motor winding has burned out. In this case, you also need the qualified help of a specialist who can repair the electric lawn mower in a short time.

Do-it-yourself gasoline-powered lawn mower repair

Lawn mower Stiga

If the mowing device does not start after wintering, then the gas tank should be checked. Gasoline left in the mower can lose its performance over the winter. It is capable of stratifying into fractions by density or creating a sediment that clogs the system and does not allow the device to work normally. It is necessary to drain the remains and refill with new fuel.

Note! It should be understood that the use of a mower with a gas generator is recommended in areas with a slope not exceeding 15 °. If the skew is large, then the motor may simply stall.

Quite often, the reason a device does not start well is a broken lawnmower starter. The starting device may not work due to a broken cord or a broken spring. To repair a part, you will need:

  • unscrew the screw that secures the pulley with the starter cover;
  • remove the antennae and spring;
  • remove the pulley and visually determine the cause of the breakdown;
  • the destroyed spring will need to be replaced completely;
  • when the part comes out of the hook, you will need to bend the antennae and return the spring to its original position, then install it in the groove and screw it on.

The cord is simply changed to a new one by passing it through a special hole and tying it to the coil. After that, you will need to start the spring.

Quite often, the reason a device does not start well is a broken lawnmower starter

In some cases, the four-stroke engine may not start due to spark plug failure. To check this, you need to visually inspect the parts for the presence of heat, as well as sparks. The absence of the latter prevents the fuel from igniting. When there is no ignition, the engine cannot start its work either. You should not use candles, if they create sparks every other time, it is better to install new ones. You can remove the spark plugs and carry out a visual diagnosis: a dry surface means that the problem is in the supply system, and a wet one in the carburetor. If the parts are black and caked, then you will need to buy new lawn mower candles.

If tools permit, then you can disassemble the mower and repair any faults yourself. Some problems can be solved by cleaning and flushing the lawn mower carburetor in kerosene. To do this, you need to dismantle the part from the structure and inspect it. If the gaskets are burnt or rubbed, they must be replaced.There may be carbon deposits on the air damper, which can be removed with a solvent or kerosene. This will improve the quality of the fuel-air system.

Oil change

The reason for flooding and overheating of the device during operation can be:

  • Dirty lawn mower air filter. You will need to get it out and rinse it, in some cases it is better to change it to a new one.
  • Idle adjustment failures. The jets must be tightened to the correct position, after which the sound of the motor is leveled.

It is important to regularly lubricate the lawn mower gearbox as the part transmits rotational movements from the shaft to the cutting element. For this, gears are used, which must be in perfect condition.

Important! Extraneous noise during operation, which comes from the bottom of the device, indicates that lubrication should be carried out more often. The appearance of knocking and backlash indicates the destruction of the bearing, which will need to be replaced with a puller.

An uneven cut in the grass indicates a problem with the blades. In case of loss of sharpness and breakage, it will be necessary to sharpen or replace. In some cases it is better to use a lawn mower blade adapter which is versatile.

You should not repair gasoline lawn mowers if there are no special tools and skills, as such actions can lead to complete failure of the unit.

How to disassemble a lawn mower with your own hands

Lawn mower Greenworks

Before you start disassembling the trimmer, you should figure out what parts it consists of. The classic design consists of the following elements:

  • frame;
  • engine;
  • knife;
  • protective cover;
  • lawn mower wheels;
  • manual control system;
  • switch;
  • cable.

Note! Depending on the type of device, both a fishing line and a metal disc for a lawn mower are used as a cutting element. In the latter case, the device can even cope with shrubs.

To disassemble the electric lawn mower, you will need to have special spanners and wrenches available. First of all, the case itself is untwisted, the air filter cover is removed, and then you can proceed to dismantle the carburetor. Before removing this part, you need to disconnect the fuel hose, as well as the cable that is responsible for the position of the damper. Then you can proceed to disassemble the carburetor itself.

Petrol lawn mower maintenance

To extend the life of the device, you will need to carry out self-care, which consists in the following:

  • knife sharpening;
  • cleaning the lawn mower deck;
  • cleaning the motor;
  • oil change and lubrication of all elements;
  • replacement of spark plugs;
  • draining gasoline at the end of the operating season.

Replacing candles

If you regularly carry out maintenance of gasoline lawn mowers, then there will be no problems with the failure of individual parts and clogging of the system. At the same time, you do not need to have special skills for repairing such devices. All manipulations are pretty simple. It is recommended to have spare parts for lawn mowers in stock: line, spring, spark plugs, gaskets, cord of the correct size.

Regular and correct maintenance, as well as timely repairs to lawn mowers and replacement of individual parts, will help extend the life of the grass trimmer and save the cost of buying a new device. But, if the cause of the breakdown is quite significant and requires special skills and abilities, then it is better to contact a specialist who can fix the breakdown with minimal losses for the owner.