Despite a fairly wide selection of lawn mowers with different operating principles, gasoline mowers do not lose their popularity. They have earned respect among users for their power and autonomy.

For a comfortable work process and no breakdowns during operation of the lawn mower, as well as other garden equipment of a similar action: trimmers, brushcutters, the first start is very important. Failure to pay sufficient attention to preparing the equipment for use, this can affect the quality of work or lead to damage to the unit.

Starting the lawn mower

Before starting the gasoline lawnmower, a visual inspection should be carried out for visible damage. The process of starting the unit is conventionally divided into several stages.

Fuel mixture preparation, refueling

If the mower is started after winter, the contents of the tank are checked: if there is unused fuel, it must be drained. Then you can start refueling the equipment. It is important to know some of the nuances here.

A fuel mixture must be used for refueling two-stroke engines. It can be purchased ready-made or prepared yourself. There is nothing difficult in preparing the mixture, but you need to adhere to the necessary proportions.

Gasoline lawn mower Oleo-Mas

When using synthetic oils, a ratio of 1:50 is used - for 5 liters of gasoline, 100 g of oil.

When using mineral oils, the proportion is 1:35 - 100 g of oil per 3.5 liters of gasoline.

Refueling a four-stroke engine does not require fuel mixture preparation. There is a special sump for oil, gasoline is poured separately. It is important to remember that the oil also needs to be changed, depending on the intensity of use of the mower. Basically, you need to change the oil every 50 hours or at least once a year.

Important! Lawn mowers perform well with oils with an SAE-30 viscosity index. In addition, if the engine was run-in with synthetic oil, it cannot be replaced with mineral oil in the future and vice versa.

As for gasoline, Chinese, Japanese and American lawn mowers work well on A-92 fuel, for European models it is better to use gasoline with a high octane rating.

When refueling the mower, make sure that the gasoline level is 2-3 cm below the edge of the fuel tank.

Starting cold engine

Before starting an unheated lawn mower, the transmission, ignition system is turned off, and the motor shaft is scrolled with a starter or starter cord.

Then a number of actions are performed:

  • The ignition is switched on;
  • The air damper closes;
  • The engine is started.

    Petrol lawn mower STIGA Collector

If the mower does not start, you will have to carry out a series of manipulations:

  • The damper remains closed, the ignition is on;
  • The fuel pump (suction) button is pressed about 5 times;
  • An attempt is made to start the engine.

In case of repeated failure, you should:

  • open the flap to prevent candles from flooding;
  • turn the shaft with the starter;
  • blow out the combustion chamber;
  • start the engine.

Sometimes it may take about 15 jerks to start the motor for the first time - this is quite normal for this technique.

When the engine starts, the throttle lever is pulled once to use idle. Further, the lever is set to the position corresponding to low rpm. In this position, the engine should run for about 5 minutes to warm up. If necessary, its operation can be stopped by pressing the "Stop" button.

Attention! It is not recommended to work with an unheated engine - this affects its performance and durability.

Starting a warm engine

Starting a preheated motor is much easier and no longer requires such efforts:

  • the control handle is set to the "maximum fuel supply" position;
  • the engine starts;
  • the desired speed is selected.

You can get to work.

Startup errors

The most common mistakes when starting a gasoline lawn mower are:

  • Not enough or no gasoline at all. A banal, but fairly common reason why the lawn mower does not start. The tank is checked, gasoline is added to the required volume.
  • Poor quality fuel or improperly prepared fuel mixture. In this case, it is very important to study the recommendations and instructions regarding the required fuel quality, regarding the used lawnmower model.
  • Incorrect air damper position. If the damper is closed, and the number of jerks is more than 5, there is a risk that fuel will flood the candles.
  • Ignition off during start-up. The ignition should be turned on immediately after the air damper is closed.

    Petrol lawn mower Intertool LM-4545

Major breakdowns of petrol cutters

Despite the large selection of manufacturers and the variety of models, the reasons why a Makita, Honda, Husqvarna or other lawnmower won't start is the same for everyone.

What gasoline to pour into the lawn mower

The main reasons why a gasoline lawn mower does not start or does start, but immediately stalls, may be problems with the ignition, carburetor, filters.

If the filled fuel and fuel mixture are of good quality and in the required quantity, the air damper is closed, the lawn mower starts up and immediately stalls, the reason may lie in the following problems:

  • Defective or flooded spark plug. In this case, you should unscrew the candle, dry it well and carefully clean it with a nail file or file. Excess fuel is drained, the spark plug hole is dried. A gap of 1 mm is set, and the candle is screwed in again.

Important! It takes at least half an hour to dry the channel.

  • Dry threaded connection. It should be lubricated with gasoline so that the spark can ignite.
  • No spark from a candle. In this situation, the contact of the candle and the high-voltage wire is first checked. If the contact is normal and the mower makes a pop and stalls, there is an ignition problem, and you cannot do without a service center.

These breakdowns are common reasons why the Husqvarna lawnmower will not start.

Quite common reasons for garden equipment breakdowns, including why the Honda lawnmower won't start, are air and fuel filter problems:

  • Clogged air filter. If the first possible causes are not confirmed, and the mower still stalls, you can remove the air filter and try to start the machine without it. If the stalled engine starts, the reason is in it. The filter should be cleaned or replaced with a new one.
  • Dirty fuel filter. Another possible diagnostic option. The filter element is inspected and replaced if necessary.

Important! It is highly discouraged to operate a lawn mower without a filter element.

  • Breather dirty. With its help, the pressure in the gas tank is regulated. If the breather is blocked, a vacuum is created and the fuel supply stops.

The following breakdowns are more serious and without certain skills it is not easy to cope with them. There are problems in carburetor malfunctions:

  • Contamination of jets and channels.They are washed with special fluids, blown with a stream of air from the carburetor.
  • Worn gasket. It is being replaced with a new gasket.
  • Damage to tightness. Diagnostics is carried out using a tonometer. If the pressure is stable, everything is fine, it drops - you need to find and replace the damaged element.

Another breakdown option is a malfunction of the piston group. Worn or damaged pistons should be replaced.

Petrol lawn mower Vityaz BG-4900

Rules for operating a gasoline lawn mower

Lawn mower Briggs & Stratton

Like any technique, the mower needs some care and basic principles of use. These rules are simple, but will help keep the unit working for a long time.

General operating rules:

  • Read the instructions for using and caring for the lawn mower, study the basic rules of operation, storage and safety.
  • After each use, clean the body, channels, grass catcher, knives, preferably with the use of special liquids.
  • Do not clean a lawnmower with a hot engine.
  • During operation, monitor the condition of the engine, do not let it overheat, take breaks.
  • If the mower is in operation for long periods (about a month), drain the fuel. In this case, at the end of work, the device is given the opportunity to idle and stall.

Rules for preparing equipment for winter:

  • A visual inspection of the mower is carried out, the main parts are removed, cleaned, dried, damage is corrected.
  • Fuel is drained.
  • The air filter is being cleaned.
  • Oil is poured into the gearbox.
  • All moving parts of the engine are cleaned and lubricated.
  • Oiled cloth wraps around the motor.

    Petrol lawn mower MTD Smart 51 BO

Safety regulations:

  • Before starting work, the working area is checked for foreign objects: stones, branches.
  • The presence of unauthorized persons is not allowed at a distance of at least 5 m from the mower.
  • The work is carried out in special glasses.
  • A visual inspection of the mower is carried out for damage, loose parts. Malfunctions are eliminated.
  • You can mow grass, no higher than 20 cm, no more than a third part at a time.
  • When working on slopes, drive along the slope, not up and down.
  • The engine stops before changing the miter height.
  • If foreign elements enter the mower knife, the work stops, the knife is cleaned.

Petrol lawn mowers have earned the respect of users for their power and quality of work. In order to extend the durability and performance of the unit, you need to study all the intricacies of care and maintenance of the lawn mower, follow the safety rules, adhere to the operating instructions for this equipment.