lawn mower spins at idle. Gearbox

Grass trimmer head spins at idle

trimmer for grass, both electronic and with gasoline engine (ICE), is an indispensable tool in the summer and autumn period, the owners of cottages and private houses. Easily removes weeds, small bushes and trims lawns. However, just like no other machinery, grass trimmers fail all of a sudden. To remove the malfunction at home, the user of the technique, you must first find the cause of their occurrence.

Lawn mowers and electronic grass trimmer, if not consider breakage associated with the rod and mowing head, the malfunction in the main occur in the area of the motor.

Common breakdowns of the gasoline grass trimmer, which in most cases face the owners of this unit, are as follows:

  • motor breakage;
  • carburetor problems;
  • problems with fuel supply;
  • muffler failure;
  • gearbox breakage;
  • Broken starter;
  • difficulties with the air filter;
  • the breather plug on the gas tank is clogged.

Since the device electric mower is much easier than mototrimmera, the circumstances of his failure is little.

lawn, mower, spins, idle

It should be emphasized that the removal of some there is better to trust a specialist.

In the main, the trimmer for grass stops working normally in the following cases:

  • electronic cable breakdown;
  • defective control button;
  • burned out motor stator winding;
  • Breakage of contact connections on the engine.

The prerequisites of why the gasoline grass trimmer would not start, will be different, so you need to conduct a step-by-step diagnosis of the unit.

Remember that always before you start the machine requires checking the availability and properties of fuel. In our version should not be stingy and save, additionally “smart” about the amount of oil added. Our client remains necessary to do according to the management attached to the machine, because when the piston group is ready to fail, its replacement will cost about 70% of the total price of the grass trimmer. Fill up the fuel on the basis that you will fully use up during the work. The gasoline left in the tank loses its characteristics after a certain period of time and can harm the engine. Do not prepare the mixture in advance and in huge quantities. If the lawnmower does not start well, try to drain the “old” fuel from the tank, and refill it with freshly prepared consistency.

Grass trimmer repair: how to stop grease leakage from the gearbox

Grass trimmer malfunction: Where does the grease go from the gearbox trimmer for grass (Chinese trimmer for grass, in the gearbox instead of a plug screwed the grease nipple and spritzuya).

Grass trimmer malfunction cause: Pressurized grease has squeezed the closed bearings of the gearbox. During operation, the hot liquid grease, driven by rapidly rotating bevel gears (in a small volume of the gear housing) “flies out” or into the driver’s chuck, if the closed bearing rings are pressed on the driven shaft, or up into the body of the tube, if the closed bearing rings on the drive shaft of the gearbox are pressed.

See also  The lawnmower stops when you press the gas. When opening the air damper

Grass trimmer repair with your own hands: Replace bearings (or the whole gearbox) in the service center and use a special grease for the grass trimmer gear (for example, Husqvarna).

Tip: Chinese lawnmowers have a small hole for adding grease to the gearbox, so it would be more convenient to take the grease from the branded tube to the medical syringe (without needle), and from it is already adding grease to the gearbox.

Lawnmower carburetor design

Lawn mower carburetor base. duralumin housing. If the grass trimmer does not pick up speed, the lawnmower should idle. It has a diffuser (hole with internal circuits). The air is forced in through this opening. The oxygen (air) flow rate depends on the cross-section (orifice) of the diffuser.

Fuel lines in the diffuser. fuel is being sucked out of them with an air current.

Why does the STIHL electric brush cutter not draw its full power?

The rotational speed can also be a problem with the electric grass trimmer. The causes are entirely different from those for fuel sprinklers.

You can rectify the problem yourself

The electric grass trimmer does not develop the required power, because:

  • the line voltage is more than 10% below the minimum required for the unit
  • there is a failure in the soft start (if there is such a system);
  • there is a defect in the brush unit
  • The motor winding has caught fire;
  • Sometimes the rotating parts get jammed.

To adjust the voltage, you should first check its power. If it does not comply with regulations, increase it with a stabilizer.

Have the soft starter system repaired by your STIHL Service Center.

Note! Brushes wear out and have to be replaced. If new ones are installed, it is advisable to clean all surfaces with which they come into contact.

To adjust the voltage, first check the power.

If the motor winding is burning out, the electric motor has to be replaced.

Jamming of the pivoting parts can be caused by a variety of factors. To get rid of them, the entire drive unit must be overhauled.

For your information! The last problem can also occur with a different machine from this company. STIHL pruning shears, and sharpening the blade on the scissors is the solution.

Care of the cutting units of the lawnmower

Saw heads blunt or wear out over time. Working with the tool becomes more strenuous, the strain increases and the quality of mowing is impaired. Metal saw blades are sharpened, plastic ones are replaced.

If the cutting tool is a line for the trimmer, it gradually wears out, and a new material is installed in the spool. The principle of operation of the line cutter consists in the gradual unwinding of the spool under the action of centrifugal force. When in contact with the grass, the trimmer’s fishing line rubs off, from the spool it feeds gradually. a special winding is needed so that the two cutting elements come out at the same time and do not get tangled with each other.

The illustration shows how to correctly wind the line for the trimmer on the lawnmower spool. Before winding a new line for the trimmer it is necessary:

  • having unscrewed the nozzle, carefully remove the cover, holding the spring with your hand;
  • remove old line scraps from the reel;
  • Measure 5 meters of new string and fold it in half;
  • in the spool guides under the 2 ends, hook the middle part to the notch and wind in the direction of the arrows for each half of the string;
  • the remaining 20 cm of the spool through the recesses on opposite ends of the spool;
  • install the spring and washers, put the ends of the line outside, close the drum with the cover.
See also  How to change a knife on a lawn mower. Bosch Rotak 37 Li how to change a knife on a lawn mower

In order to better understand how to change the line for the trimmer on the gasoline mower, watch this video.

Lawn mower malfunctions and how to fix them

Any type of chain saw has a hollow shaft, which is placed connecting cable between the motor shaft and the bottom gear, which transmits the rotation of the tool with cutting equipment. The carburettor and motor are located in the upper part, the gearbox and the working tool are in the lower part, covered with the hood. In the middle part there is a transverse handle, where the control buttons are placed. To unload the hands, there is an unloading belt holding the boom by the operator’s torso.

In selecting a lawn mower, it is better to have a machine with a two-stroke engine than a four-stroke. The two-stroke motor is more maneuverable and easier to repair. The four-stroke unit has a lower vibration level.

It follows that the repair of the lawnmower is to eliminate the defects;

  • the engine does not start;
  • the cutting mechanism does not develop;
  • the engine stalls;
  • Gearbox gets hot;
  • You hear a knocking noise, a powerful vibrating boom.

While troubleshooting, it is necessary to carry out diagnostics, to find the non-working node.

It is fundamental to know the lubrication points of the tool. Consistent maintenance and cleaning after use will extend the life of your machine. Tighten the mounting screws, have fuel ready and fill the tank before use.

Block: 2/6 | Number of characters: 1199

How to clean and store the tool?

During the operation of the lawnmower, monitor the condition of the engine cooling system. The channels in the starter housing and the cylinder fins must always be clean. If you ignore this requirement and continue to operate the brushcutter, you can bring the engine out due to overheating.

Proper care during use allows you to use your petrol chain saw for a season or two without needing major repairs

lawn, mower, spins, idle

Allow the engine to cool down before cleaning. Take a brush with a soft pile and clean the dirt from the outer surface. Clean the plastic parts with solvents such as kerosene or special detergents.

After the summer season the lawnmower should be prepared for long periods of storage. Drain the fuel mixture from the tank. Then the engine is started in order to exhaust the residual fuel in the carburetor. The whole tool is well cleaned of dirt and sent to “winter hibernation”.

As you can see, you can repair your lawn mower with your own hands. Seek service in the event of a serious breakdown. In this case it is necessary to correlate the cost of repair with the price of a new lawnmower. It may be more efficient to buy a new tool.

Chainsaw engine will not start

If the mechanism does not start, immediately stalls, consistently check:

  • if there is fuel in the tank;
  • the serviceability of the spark plug;
  • cleanliness of the air and fuel filter;
  • The cleanliness of the breather and the exhaust duct.

it is necessary to refuel with a freshly prepared mixture on the basis of АI-92, oil is injected for exact dosage with a medical syringe. It will help to avoid an expensive repair of the chainsaw.

See also  How to lubricate the shaft of a lawn mower. Strong vibration during operation of the lawn mower how to lubricate the shaft of the bar

It is necessary to make sure that the spark plug is working, gives a spark when it touches the body. In such a case, it is necessary to dry the spark plug channel, clean and dry the part itself. You can change the spark plug, but the channel still needs to be dried for 40 minutes. Check the serviceability of the high-voltage wire, there may not always be a contact. Trouble in the ignition unit when repairing the lawnmower, with your own hands can not fix.

If with the air filter removed and the engine doesn’t stall, the cause is in it. it needs to be replaced or cleaned. The fuel filter should be changed with great care. After checking the cleanliness of the breather, remove the muffler mesh and clean the exhaust duct.

The next step will be the repair of the carburetor, where you will have to find the fault and fix it, taking into account the tiny size of the parts. If the simplest operations do not bring results, in order not to disturb the fine-tuning of the system, it is better to entrust the repair to a specialist. With what to start diagnosing and how to properly conduct the repair of lawn mowers with their own hands, read on

Care of the cutting units of a lawnmower

The saw headset blunts or wears out over time. Working with the tool becomes stressful, the load increases, the quality of mowing deteriorates. Sharpen metal blades, replace plastic blades.

If the cutting tool is a line for the trimmer, it gradually wears out, and a new material is installed in the spool. The principle of the filament lawn cutter is based on the gradual unrolling of the filament spool by the centrifugal force. In contact with the grass, the line for the trimmer is abraded, from the spool is fed gradually. A special winding is needed to ensure that the two cutting elements come out at the same time and do not get tangled with each other.

The illustration shows how to wind the line for the trimmer on the mower reel correctly. Before winding a new line for the trimmer it is necessary to:

  • after unscrewing the nozzle, carefully remove the cover, holding the spring with your hand;
  • remove old fishing line scraps from the spool;
  • measure 5 meters of new string and fold it in half;
  • in the spool guides under the 2 ends, catch the middle part for the notch and wind in the direction of the arrows for each half of the string;
  • The remaining 20 cm must be fed through the notches at the opposite ends of the spool;
  • install the spring and washers, bring the ends of the line outside, close the drum with the cover.

In order to better understand how to change the line for the trimmer on the gasoline mower, watch the video.

| Denial of responsibility | Contacts |RSS