The Petrol Mower Will Not Start

The petrol lawn mower will not start. Why?

If at the first start, your new lawn mower refuses to start, try the following: based on the air temperature outside, set the appropriate air damper position (at temperatures less than 30 C, the damper is closed, over 30 C half-closed position), then pump fuel into the carburetor and carefully, but pull the starter handle rather sharply until you feel some resistance. Repeat these steps in the same sequence several times. A brand new instrument must start. If this finally happened, you can safely start working by opening the damper completely beforehand.

If the mower is no longer new, then it is necessary to start its inspection from the gas tank. If the device has not been in operation for a long time, then it is necessary to drain off the old gasoline, which has a peculiarity of running out, i.E. Lose its octane properties, and refill with fresh fuel mixture. The gasoline / fuel ratio, as well as the required grades, are usually indicated in the operating instructions for the tool.

Now you need to check the spark plug, either the problem is in it or in the fuel system. The candle must be carefully unscrewed and its condition evaluated. If the candle is heavily flooded or there is black carbon on it, then it must be removed, cleaned and dried. Drain the excess fuel, if any, from the spark plug holes, drain the cylinder itself, then screw in the dried or, even more desirable, a completely new plug. If the plug was completely dry initially, you need to look for a problem in the fuel supply system. Check the fuel filter first. To do this, disconnect the suction hose and remove the dirty filter from it, clean and reinstall it, or replace it with a new one. If this does not help, you should contact the service center specialists.

Will not start after winter

In this case, you just need to drain the old and, possibly, even frozen fuel and fill in the freshly prepared mixture. Then you need to perform the same manipulations as during the first start of the lawn mower.

The petrol lawn mower will not start. Why?

If the mower stalls after starting, check the air filter. When this filter is heavily clogged with dust, it stops passing the required amount of air into the carburetor and allows dust to enter the fuel mixture. It is necessary to carefully remove the contaminated filter, clean and rinse in gasoline. If the air filter is clean, and the tool still stalls, then it is better to contact a professional to determine the cause of the malfunction and eliminate it.

Safety regulations

Read the instructions carefully before use.

Before starting work, you need to clear the area from foreign objects. Fill the mower tank with only high quality gasoline. It is allowed to operate the unit from the age of 18. Clothes and shoes must be covered.

Click here and you will see the Kamaz 65206 salon, which will tell you more than a thousand words about transport.

At work a safe distance of 15m is required. Do not smoke, open the tank cap, refill gasoline. Do not work near flammable liquids or gases.

On the basic safety rules and features of the choice of a mower.

Trimmers should only be used for their intended purpose, cannot be used for chopping branches, leveling the ground.

The benzokos is a well-thought-out equipment for lawn and gardening works, which allows not to depend on the length of the cable and the source of electricity. It allows you to quickly and efficiently mow young and not very grass, thickets of bushes and weeds, cut down trees and bushes. Although their cost is higher and they are more expensive to maintain, they pay for themselves many times over with the right choice and operation.

Cutting width

Labor costs and fuel consumption depend on this indicator. The usual cutting width is 33-43cm, industrial 43-55cm. And if this indicator does not suit you, then we advise you to choose a rotary mower for a mini tractor, since it is capable of processing large areas in the shortest possible time.

Engine power

Most an important indicator when choosing a unit is its power. There is a letter marking of power, depending on the size of the treated area:

  • Up to 150 sq.M. S
  • From 150 sq.M. Up to 400sq.M. M
  • From 400 sq.M. Up to 1000 sq.M. L
  • More than 1000 sq.M. XL.
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For very large areas of stadiums, football fields, etc. You should take a closer look at riders and garden tractors. Riders have an engine at the rear and are highly maneuverable, while garden tractors have many additional attachments and options.

Knives differ in shape and number of cutting surfaces. They can be plastic or steel. Plastic knives cannot be sharpened.

A minimum of two knives are provided for the usual configuration. They must be of high quality and well sharpened.

Additionally, they can be equipped with a saw blade for cutting small branches in trees.

The ability to replace or retail the cutting elements is essential. Poor quality blades put stress on the blades and the unit may break. But don’t be discouraged, because you can assemble a lawn mower knife with your own hands.

Wheels

The larger the diameter of the wheels, the easier they move on bumps and large grass. The wider the wheels, the less they damage the lawn. Stronger and more durable wheels with bearings.

Collectors can be soft or hard, the former are easier to store, the latter are easier to wash.

An important condition when choosing a lawn mower is the availability of service centers, which many Chinese manufacturers cannot boast of. Find out more about the most popular petrol-powered lawn mowers here.

Caring for a petrol cutter is similar to caring for any other unit with an internal combustion engine. Periodic replacement of oil, belts, air filter is required.

Usually, refueling requires high-quality gasoline of the A92 brand and above, not expired, without contamination. The tank should not get water or dirt, foreign objects.

Worn parts should be replaced, promptly sharpen knives or change cutting parts.

At the end of the day, the bar and gear should be cleared of grass. At the end of the summer season, the petrol cutter should be prepared for long-term storage. Drain the fuel mixture from the tank, in order to generate fuel residues, start the engine. Allow the engine to cool, then clean the entire tool. Plastic parts are cleaned with a soft bristle brush and solvent.

Choosing a petrol mower

Before choosing, you need to decide on the type of lawn, the goals of purchasing a lawn mower, with their additional functions, which may be necessary or may not be useful. The site, the type of vegetation, the frequency of work, the expected result should be carefully analyzed.

Cutting height

It is adjusted in different ways: by a central lever, independent adjustment for each wheel, by a vertical row of wheel rearrangements inside the body. The most convenient way is to change the height with a lever.. It is suitable for frequent changes of cutting height. For a good result, it is recommended to mow no more than a third of the grass at a time. This circumstance will not please every owner of a large territory, and mowers for tall grass have been specially created for them.

Tips for choosing a device on.

The gasoline cutter won’t start after winter

In such cases, the unit must be serviced. Remove the fuel system, including filters (air, fuel), disassemble the carburetor, clean and rinse each unit. Blow out the filters with air. Pay attention to fuel quality and octane number.

It should be borne in mind that products of such well-known companies as STIHL, Husgvarna and other brands will not run on cheap gasoline with a low octane number.
Suitable fuel for them is from the AI ​​92 brand and above from car refueling stations and then from well-recommended ones, since there is also bad gasoline at refueling stations. The use of high-octane and high-quality gasoline will determine how long the brushcutter will be used and how long it will last.

It is necessary to take into account one more fact that with a long storage of a diluted fuel mixture, its working qualities fall, which also leads to consequences in which the petrol cutter will not start. Therefore, it should be diluted in portions, that is, the amount of the mixture that is produced at a time.
The operating instructions clearly describe and explain the mixing ratio of gasoline and oil. Strict observance of the correct proportions will at least save you from several questions about why the petrol cutter will not start and what to do in such cases.

The benzokos starts up and stalls. What to do?

1. There is a spark, and everything seems to be normal, but the petrol cutter will not start, in such cases, you should check the air access valve to the fuel tank. A clogged valve leads to the creation of a vacuum in the tank, in which the carburetor does not receive enough gasoline, so the petrol brush will start, but then stall. To exclude this reason, you need to clean the valve and try to start a petrol cutter with a tank cap that is not completely twisted.
2. If the brushcutter does not start at the same time, you should remove and clean the fuel filter, as well as check all the carburetor parts, and then try to start. The petrol cutter will not start again, the air filter is disconnected, try to start without it, if the mower starts up, the reason is in the air filter, replace it.

The benzokos does not start on a cold

When starting a cold engine, it is not recommended to press the gas. Tilting the brushcutter so that the air filter is on top, press the fuel suction button 5-6 times, set the function switch lever to the start position, pull the starter cord several times until the engine starts. After a few seconds of running the motor, turn off the starting system.

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The petrol cutter will not start or will start, but stalls. What is the reason?

To understand this, you need to know the principle of operation of the unit as a whole. It also happens that, just bought, a new saw does not start, and it starts running around the service centers, in such cases it is recommended:

Carefully read the instruction manual;
to study in detail the method of the first start-up and running-in of petrol cutters;
try to understand how the product works;
how gasoline is pumped up and so on.

Reasons for malfunction of petrol cutters:

The quality of gasoline is poor;
incorrect proportion of gasoline and oil;
clogging of the fine filter;
the spark was gone.

The petrol cutter will not start, the spark is gone

The loss of a spark entails checking the contacts and the correctness of the gap between them, the conducting wires to the candle and the candle itself.
The way to check the spark is to unscrew the candle, connect a wire to it, put the candle sideways to the engine casing and pull the starter several times as if starting a petrol cutter, while looking at the coal and the contact of the candle, a spark should run between them.
If there is no spark, take a new candle, follow the same procedure, if the spark cannot be traced, then there is a problem in the wire or contacts, it is better to replace them.

The benzokos does not start when hot

If the brushcutter was recently in operation and has not yet had time to cool down but does not want to start, press the gas trigger, pull the starter cord sharply several times until the engine starts and only then the gas trigger is released. If enough time has passed and the brushcutter has managed to cool down, then it is necessary to start it as if it were cold.

We carry out diagnostics of a candle and a candle channel

The Petrol Mower Will Not Start

If the quality of the fuel mixture is not in doubt, and the brushcutter stalls when starting, then a flooded candle may be the cause. Here, for repairs, an ordinary candle wrench is suitable (every motorist probably has) and a spare candle.

  • We unscrew the candle and wipe it;
  • Dry it thoroughly (do not ignite);
  • We drain the excess fuel in the chamber through the spark plug hole and dry it;
  • We clean the old candle from carbon deposits using a file or a lady’s file;
  • We expose a gap with a distance of 1 mm (you can check with any coin);
  • We put everything back in place and try to start the trimmer.

If the candle is working, the socket where it is located is completely dry, and the petrol cutter does not want to start, lubricate the threaded connection with gasoline. It should be slightly damp. No matter how wonderful a spark the candle may give out, there is simply nothing to ignite in a dry chamber.

If the trimmer motor still does not start, you should exclude such a reason as the absence of a spark due to poor contact between the spark plugs and the high-voltage wire. If the connection is good and there is still no spark, most likely your ignition unit has flown. Here it will not be possible to do without a master, since the part is not repaired, but sold as a single unit.

Checking the fuel mixture

Before starting the engine of the gasoline streamer, check the presence and quality of the fuel mixture. Do not save, do not be greedy and do not be clever in this matter. Repair or replacement of the piston group will cost you too much (sometimes up to 70% of the cost of a new tool). Prepare the oil-fuel mixture strictly according to the instructions. Calculate its amount based on real needs. Excess gasoline left over after work loses its quality over time.

How to start diagnostics of brushcutters

If the brushcutter does not start or immediately stalls after starting, it is necessary to sequentially check all the main components and assemblies. The verification algorithm is as follows:

  • Fuel tank (fuel quality);
  • Candle and candle channel;
  • Air filter;
  • Fuel filter;
  • Breather;
  • Outlet channel.

These nodes are most often the source of major problems that can be eliminated after a thorough inspection.

Complex reasons for the failure of petrol cutters

If the step-by-step troubleshooting algorithm does not work, and your scythe still does not start or stalls, it is worth inspecting the carburetor and the engine itself. A clogged carburetor can be one of the reasons for erratic tool performance. There are three main problems here:

  • Clogged ducts or nozzles. All this is cleaned by special washes or blown by a powerful jet of compressed air from the compressor. Do not use needles and wires, as the bore may be damaged;
  • Worn carburetor gasket. Exit replacement of a failed gasket;
  • Violation of tightness. To check this indicator, you can use an ordinary household tonometer, replacing it with a suitable pressure gauge. Watch the readings: if they do not change everything is fine, but if the pressure starts to drop, then some part of the carburetor is faulty. We’ll have to find it and replace it with a new one.
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If everything is in order with the carburetor, then the petrol trimmer may not start due to wear of the piston group. If chips, scratches or scuffs are found, the piston or cylinder should be replaced. Piston rings are subject to mandatory checks. A small backlash of the piston when rocking the connecting rod indicates that it is time to change the rings. It is best to entrust this procedure to the specialists of the service center.

Breather and exhaust port

Often, delicate branded petrol brushes do not start and stall due to a dirty breather. The main function of this element is to equalize the pressure in the gas tank. When this unit becomes clogged, a vacuum is created in the tank, preventing the supply of fuel. You can eliminate the malfunction by cleaning the breather. You can use a regular needle for cleaning.

Normal operation of streamers with internal combustion engines can be disrupted due to dirt entering the exhaust channel or a clogged silencer mesh. There is such a problem on older generation models. The issue can be resolved by traditional cleaning and removal of the anti-spark grid.

Diagnostics of filters for petrol cutters

Another reason why the gasoline scythe stalls is the air filter. To eliminate it, try removing the filter and starting the trimmer without it. If possible, then you will have to change the air filter to a new one, or at least blow through and thoroughly clean the old one.

The petrol trimmer may not start if the fuel filter is dirty. This is the next step in our algorithm. Here we check the condition of the filter element and, if necessary, replace it with a new one. When replacing, try not to leave the suction pipe completely without a filter, this is prohibited by any operating instructions. Haste can turn into repairing the engine piston group.

What to do if the petrol lawn mower won’t start?

The most important point when using any equipment is to comply with the basic rules of operation and its timely maintenance. This approach will ensure that your petrol lawn mower is working properly and for a long time. Still, sometimes unforeseen situations happen, and the device for some reason does not want to start. In our article, we will tell you about the possible causes and solutions to such a problem.

Faults that you can correct yourself

When your petrol lawnmower will not start, the first step is to check for fuel in the tank. If it is missing. Top up to the desired level. Often, when the device is not used for a long time, gasoline runs out, so it must be completely drained and refilled with new. This procedure must be done carefully so that fuel does not get onto the engine, as this can lead to ignition in the future (when the engine heats up). Which gasoline is better to use, you can find out from the technical passport of the device.

In order for the unit to start, you need to pump fuel with a primer (if available in this model) into the carburetor and set the maximum speed. You need to start the technique carefully. The starter cord must be pulled out smoothly until it stops, and then pulled towards you with one even sharp movement.

A problem can occur if the air damper is not correctly positioned during the first start. Depending on the air temperature, it is completely closed or set to the middle position (above 30 C). Then it must be fully opened.

Check the air filter for dirt. To do this, turn off the machine and disconnect the wire from the spark plug. Unscrew the cover and remove the filter. Wash it with gasoline and dry it thoroughly, or just put a new one. Remember that it is recommended to change the air filter after every 25 hours of operation.

Another reason your petrol lawnmower won’t start could be a faulty spark plug. Perhaps she was just flooded with fuel. In this case, unscrew it, clean it and check for a spark. It may not be present when the spark plug is filled with fuel. Place choke control handle (if equipped) in the CLOSED position and start the engine. If this does not help, it is better to seek help from a specialist.

Try to constantly inspect the underside of the unit, as any damage to it may cause the engine to stall.

If your petrol lawn mower started up normally but stopped working almost immediately, it is likely that the crankshaft or piston is stuck. Another reason may be insufficient oil in the crankcase. We recommend manually moving these parts and checking the oil level with a special dipstick, you may be able to correct this problem.

However, remember that the replacement and repair of all faulty components and elements should be entrusted to professionals from authorized service centers. Never do it yourself.

If you want to talk with a specialist and get advice on the issue that has arisen, call us by phone: 7 (495) 135-29-39 every day from 10.00 to 20.00. We will provide all the information you need.