The Lawn Mower Does Not Start Well When Hot

Adjustment and tuning of the carburetor

The maximum and minimum engine speed, smooth idle speed are regulated by the carburetor. Here are the amounts of fuel mixture and air supplied, their ratio depends on the steady operation of the lawn mower. lawn mower Will not start if the carburetor is incorrectly adjusted. The procedure for adjusting the device for supplying fuel at low speed (L), high speed (H) and idle (T) is regulated by the screws of the same name:

  • The chainsaw should run for at least 10 minutes, since the adjustment is carried out hot.
  • Screw H is turned smoothly to maximum speed, then turned by ¼, counterclockwise, reducing the speed of rotation of the engine shaft.
  • The idle speed is adjusted with the screw T, ensuring that the scythe does NOT rotate.
  • The screw L is adjusted, at first opening the maximum throttle, and then smoothly reducing the speed to stable minimum.

After adjustment, a working carburetor with cleaned filters and a checked ignition must ensure the engine is running. In the event of a carburetor malfunction, after repairing it, you will need to adjust the feed system again before starting the lawn mower.

Rare breakdowns that interfere with the operation of lawn mowers can be:

  • Rewind spring defective;
  • Broken or stuck starter pulley;
  • Defective starter assembly.

The most important malfunction, the elimination of which is associated with replacing the engine, may be the failure of the engine piston group. The cost of repairs will cost about 70% of the cost of the product. Understanding the reasons why the lawn mower won’t start will help:

Troubleshooting

  • Engine failure (piston wear, bearing failure, crankcase cracked)
  • Malfunction of the fuel mixture supply. clogged pores of the air filter or malfunction of the carburetor;
  • The ignition system does not work;
  • Mechanical malfunction. leaking hoses, broken braided wires, ruptured tubes.

The user first needs to check if there is fuel in the tank. The launch is carried out in accordance with the annotation, put the dust on its side. Set the air damper to the “closed” position, pump up fuel, turn on the ignition and make 3-4 sharp jerks with the starter. If the engine is running, open the air damper. The lawn mower does not start. we repeat the operations with a slightly open air damper.

If the launch fails, we start looking for the reason for the failure:

  • Check fuel quality;
  • Make sure that the candle is working and the candle channel is clean;
  • Check the cleanliness of the air filter;
  • Make sure the fuel filter is not clogged;
  • Check the cleanliness of the breather;
  • Cleans the outlet.

complex causes will be found during the diagnosis of malfunctions leading to overhaul of the carburetor. Such reasons include clogging of the internal channels of the carburetor, wear of the gasket on it and a violation of the tightness of the internal Holloway with a loss of vacuum. Do-it-yourself lawn mowers repair, if it won’t start, will take patience.

Eliminating the reasons why the lawn mower won’t start

The fuel mixture must be prepared with the exact proportions of gasoline and oil. In this case, you must not use another brand of fuel. To exclude the ingress of dirt, gasoline must settle in glass or metal containers for 2 days. Do not use plastic utensils for storing fuel. Measure the oil accurately with a medical syringe without a needle. Use only freshly prepared mixture. Do NOT leave used fuel in the tank. If the engine is naughty, the lawn mower stalls, when you press the gas, the fuel may be to blame.

Checking the ignition system, if the lawn mower does not start, is carried out sequentially:

  • The removed candle will be cleaned of carbon deposits and dirt, dried, set a gap of 1 mm;
  • Connect to the high-voltage wire and check for Spark by pulling the starter several times;
  • If there is no spark, check the high-voltage wire for integrity;
  • Replace the candle;
  • Dry the candle channel;
  • At the same time, the operation of the ignition coil is checked, it is faulty if the working plug does NOT spark.

It is in the event of a malfunction of the ignition coil of the lawn mower Does not start up hot, stalls, works intermittently.

Cleaning or replacing the air and fuel filter will ensure the proper consumption of ingredients entering the carburetor. The air filter can be washed in soapy water or replaced. If nylon is used, it is washed, the porous felt filler is replaced. Change the fuel filter carefully. Do not leave the intake port open. Whether it is necessary to replace the air filter can be determined if the engine starts with the air cleaner removed. Whether it is necessary to change the grid for fuel supply, if the lawn mower does not start, a dry candle will tell.

Breather, gas tank air inlet. If it becomes clogged, a vacuum is created in the tank and the mixture does NOT enter the carburetor. The hole can be blown out with air or cleaned with a needle. Clean the exhaust duct, remove the anti-spark screen of the muffler.

No matter how confused, if the lawn mower does not start. Taking proper care of your chainsaw

There are unnecessary phrases in the operating instructions, everything that is offered is aimed at trouble-free operation of lawn mowers. Cleaning of all parts after each work cycle helps to easily remove non-hardened residues and dirt. You need to clean only the cooled nodes. This technique contributes to the quality of air cooling of the engine and gearbox.

For refueling, you must use fuel with the oil recommended in the instructions. If the combustible mixture is left in the fuel tank, the oil will float up and, when starting, will land on the damper, impairing its adjustment. The mixture can sediment and clog the fuel supply to the carburetor.

It is impossible, it is dangerous for the tool and the health of the mower, to use a metal cable instead of a fishing line. It cuts more efficiently, but the load on the gearbox and engine increases. A piece of wire that has been worn down flies at the speed of a bullet during separation. Effective mowing can lead to early wear of the engine piston group. For more efficient mowing, it is suggested to use the “star” line profile.

lawn mower Will not start, spark has disappeared

The loss of a spark entails checking the contacts and the correctness of the gap between them, the conducting wire to the candle and the candle itself.
Spark check method. Unscrew the spark plug, connect a wire to it, put the spark plug sideways to the engine casing and pull the starter several times as if Starting the lawn mower, while looking at the Coal and the spark plug contact, there should be a spark between them.
If there are sparks, take a new candle, do the same procedure, if the spark is NOT traced, then the problem is in the wire or contacts, it is better to replace them.

the lawn mower starts and stalls. What to do?

There is a spark, and everything seems to be normal, but the lawn mower will not start, in such cases you should check the air inlet 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 lawn mower will start, but then stall. To exclude this reason, you need to clean the valve and try to start the lawn mower C with an incompletely twisted tank cap.
2. If the lawn mower does not start at the same time, remove and clean the fuel filter, as well as check all carburetor parts, and then try to start. Again The lawn mower will not start, the air filter is disconnected, try to start without it, if the mower starts, then the reason is in the air filter, replace it.

lawn mower Will not start on a cold

When starting a cold engine, it is not recommended to press the gas. Tilting the mower 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 cord several times until the engine starts. After a few seconds of engine running, disable the starting system.

lawn mower Will not 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 noted that the products of such well-known companies as STIHL, Husgvarna and other brands will not work on cheap gasoline with a low octane number.
For them, fuel from the AI ​​brand. 92 and above is suitable from automobile gas stations and then from well-recommended ones, since there is also bad gasoline at gas stations. Here are the applications of high-octane and high-quality gasoline, it will depend on how long the lawn mower 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, working qualities fall into it, which also leads to the consequences in which the lawn mower does not start. Therefore, it should be diluted in portions, that is, the amount of 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, why the lawn mower does not start and what to do in such cases.

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The lawn mower 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 a new saw just bought does not start, and it starts running around the service centers, in such cases it is recommended:

Read the instruction manual carefully;
study in detail the method of first starting and running in lawn mowers;
try to understand how the product works;
how is pumping gasoline and so on.

Causes of malfunctioning lawn mowers:

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

lawn mower Will not start when hot

If the mower 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 cord sharply several times, until the engine starts and only then the gas trigger is released. If enough time has passed and the lawn mower has cooled down, then it should start as if it were cold. If the above methods did not help, the lawn mower did not start, then you should contact the service center.

When it starts badly on a hot diesel engine

Unfortunately, diesel engines can sometimes fail to start hot. The most common causes of this phenomenon are malfunctions of the following nodes:

The Lawn Mower Does Not Start Well When Hot
  • Coolant sensor. Here the situation is similar to what was described in the previous section. The sensor may fail and, accordingly, transmit incorrect information to the ECU.
  • Crankshaft position sensor. The situation is similar to an injection engine.
  • Mass air flow sensor. Similarly.
  • High pressure fuel pump. In particular, this can happen due to significant wear of the bushings and the pump drive shaft seal. Air enters the pump from under the stuffing box, which makes it impossible to gain operating pressure in the pre-plunger chamber.
  • Diesel engine idle system.
  • Fuel pressure control.
  • Ignition module.

Now we will try to summarize the information provided so that it would be easier for you to find the cause of the breakdown if it happened to your car.

Plunger pair of injection pump

It turns bad on hot

With the arrival of hot days, more and more drivers are faced with the problem of a poor engine start on a hot one, after a few minutes of parking. over, this is a problem not only of carburetor engines. a situation when it does not start up hot can wait for both the owners of cars with an injection engine and diesel cars. Only the reasons are different for everyone. Here we will try to collect them and identify the most common.

When Won’t Start On A Hot Carburetor Engine

Why is it bad to start hot and what to do

The reasons why the carburetor does not start well on a hot one are more or less clear, here the volatility of gasoline is mainly to blame. The bottom line is that when the engine warms up to operating temperature, the carburetor also heats up, and after turning off, within 10-15 minutes, the fuel begins to evaporate, so it is difficult to start the car.

Pressing the gas pedal to the floor and purging the fuel system will help start a hot engine in such a situation, but no longer than 10-15 seconds, since the fuel can fill the candles. If the question concerns “Zhiguli”, then the fuel pump may also be to blame, since the “Zhiguli” probe do NOT like heat very much and sometimes refuse to work at all when overheated.

Why does a warm engine stall

Some motorists are faced with a situation when an already running and warmed-up engine suddenly stalls. over, this happens after the sensor has recorded a set of normal operating temperature. There may be several reasons for this. Next, we will consider them in more detail, and also indicate what needs to be done in this or that case.

  • Poor quality fuel. This situation is typical, for example, if you drive away from the gas station, and after a short period of time the engine starts to “cough”, the car jerks and stalls. The way out here is obvious. drain the low-quality fuel, purge the fuel system and replace the fuel filter. It is also advisable to replace the candles, but if they are new, you can do with blowing them. Naturally, it is not worth visiting such a gas station in the future, and if you have saved the check, then you can go there and make a claim as fuel.
  • Fuel filter. With a stalling engine, you should also check the condition of the fuel filter. And if, according to the regulations, it is already necessary to replace it, then you need to do this, regardless of whether it is clogged or not yet.
  • Air filter. The situation is similar here. The engine can become “bungy” with the rich mixture and stall soon after starting. Check its condition and replace if necessary. By the way, this way you can also reduce fuel consumption.
  • Gasoline pump. If it does not work at full capacity, then the engine will receive less fuel, and accordingly, after a while it will stall.
  • Generator. If it is completely or partially out of order, then it stopped charging the battery. The driver may NOT immediately notice this fact, start the engine and drive. However, he will go only as long as the battery pack is not completely discharged. Unfortunately, it will NOT work to start the engine again. In some cases, you can try to tighten the alternator belt. If this procedure does not help, you need to call a tow truck or call your friends to drag your car to the garage or service station.

Try to monitor the normal condition of the above nodes and mechanisms. Even minor breakdowns, if they are NOT eliminated in time, can develop into big problems, which will turn out to be expensive and difficult repairs for you.

When the injection engine does not start

Since an injection engine is somewhat more complicated than a carburetor one, there will be more reasons why such a motor will not start. In particular, they may be malfunctions of the following components and mechanisms:

  • Coolant temperature sensor (coolant). In hot weather, it can fail and give incorrect information to the ECU, in particular, that the coolant temperature is above normal.
  • Crankshaft position sensor (DPKV). Its failure will lead to incorrect operation of the ECU, which in turn will prevent the engine from starting.
  • Mass air flow sensor (DMRV). In hot weather, the sensor may not cope with the tasks assigned to it, since the temperature difference between the incoming and outgoing air masses will be insignificant. In addition, there is always the possibility of its partial or complete failure.
  • Fuel injectors. Here the situation is similar with a carburetor engine. The fine fraction of gasoline evaporates at high temperatures, forming a rich fuel mixture. Accordingly, the engine cannot start normally.
  • Fuel pump. In particular, it is necessary to check the operation of its check valve.
  • Idle speed regulator (IAC).
  • Fuel pressure control.
  • Ignition module.

Next, let’s move on to considering the possible causes of poor hot start in cars with diesel engines.

Top 3 Reasons for Bad Hot Start

So, according to statistics, the main reasons for poor engine start after idle at high temperatures are:

  • The enriched fuel mixture, which is formed due to low-quality gasoline (its light fractions evaporate, and a kind of “gasoline fog” is obtained).
  • Defective coolant sensor. At high ambient temperatures, there is a possibility of its incorrect operation.
  • Defective ignition. It may be incorrectly set or there are problems with the ignition switch.

We will also give you a table where we tried to visually show which components can cause problems, and what needs to be checked in engines of different types.

Types of engines and their typical causes Carbureted Injection Diesel
Low-quality fuel, evaporation of its light fractions
Defective coolant sensor
Crankshaft position sensor
Mass air flow sensor
fuel injectors
fuel pump
High pressure fuel pump
Idle speed regulator
Fuel pressure control
Diesel idle system
ignition module

The first thing to do in order for the engine to start up normally on hot is to refuel at proven gas stations, and also monitor the state of the fuel system of your car. If, even after a short period of inactivity in the heat, the engine does NOT start, then first open the throttle valve (press the accelerator pedal) or Remove the filter cover and leave it open for a couple of minutes. During this time, the evaporated gasoline will evaporate and you can start the engine normally. If such a procedure did not help, then it is necessary to perform troubleshooting among the components and mechanisms described above.

Checking the breather and cleaning it.

The breather is another element, from the improper operation of which the chainsaw may not start or stall during the sawing process. This element is located on the fuel tank cap in the area of ​​the air hole. This is a kind of valve that does not allow gasoline to flow out and equalizes the air pressure required for the free flow of fuel into the carburetor.

If the breather is dirty, the working chainsaw stalls, and when started it refuses to start. The thing is that air stops flowing through the hole. As a result, a negative pressure (vacuum) is created inside the fuel tank, which prevents the flow of gasoline into the carburetor.

Defining the problem is pretty straightforward. Disconnect the fuel hose from the carburetor and see what happens to the gasoline. If it flows out freely in a good trickle, then everything is in order with the breather. If it is absent or it flows weakly and intermittently, the reason for the identification is that the breather is clogged with dirt. You can solve the problem by cleaning the air hole with a regular needle or a powerful jet of compressed air.

Searching for reasons why the chainsaw won’t start

Amateur and professional chainsaws are complex devices. The service life of their two-stroke engines, components and assemblies has its own limitations. For this reason, quite reliable and expensive tools, along with cheap Chinese units, periodically fail and refuse to start. The situation when the chainsaw does not start or stalls is not very pleasant and sometimes confuses the user. How to identify and eliminate the malfunction, returned the tool to work.

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Chainsaw outlet check.

One of the reasons that a chainsaw does not start well may be a clogged exhaust channel or its muffler. At the same time, a drop in power is noted in the process of sawing lumber and logs. Most often this occurs due to resinous deposits on the spark arrestor or muffler channel, which are formed during the combustion of a poor-quality mixture of gasoline and oil, which impede the removal of exhaust gases.

A resonator clogged with carbon deposits can cause a poor start of a gasoline saw.

Eliminate the cause of the poor start of the chainsaw, in this case, you can remove the accumulated combustion products. To do this, we will perform a number of manipulations:

  • Remove the muffler by unscrewing the screws;
  • Remove the cooling panel and gasket;
  • Remove spark arresters;
  • Let’s disassemble the resonator body;
  • Wash all elements from carbon deposits with detergent;
  • Let them dry completely;
  • Collect everything in reverse order;

Determine the availability of fuel and its supply.

First you need to make sure that there is a fuel mixture in the tank of a chainsaw that does not want to start, and it regularly enters the carburetor. With a full tank, we check how the mixture is fed through the gas line. Disconnecting the fuel system pipe from the carburetor and trying to pump up. In the case of a complete order, when pumping, gasoline will be supplied in a jerk in accordance with the norms set by the manufacturer. Poor or no fuel supply can result from:

  • The fuel supply channel is clogged;
  • Debris-killed fuel filter.

Often a prerequisite for a poor start of a chainsaw can be a tank that is too full. In this case, pay attention to the presence of smudges under the saw case cover. If present, see the connection of the gasoline feed pipe to the carburetor. Most often, it is squeezed out by pressure when the tank cap is screwed on, refueling under the very neck, which prevents the engine from starting.

The quality of the fuel mixture can also be one of the reasons why the chainsaw does not start. If, after completing the work, DO NOT drain the remaining gasoline, and leave the tool for long-term storage (more than 2 weeks), then the processes of gum formation and polymerization of the components will begin to occur inside the tank. What can be a prerequisite for the appearance of carbon deposits on the piston, rings and cylinder liner. Therefore, always prepare the mixture only in the required amount before work.

Checking the spark on the spark plug and troubleshooting.

The first step in finding the reasons why the gasoline saw won’t start is to check the spark on the spark plug. There are many factors that affect the performance of this element. However, the main ones at the initial stage of instrument troubleshooting are:

  • Incorrect carburetor adjustment;
  • The presence of more than it should be, the amount of oil in gasoline;
  • Clogged air filter.

All of them contribute to the formation of carbon deposits on the spark plug electrode. In 50 cases out of 100, the saws DO NOT start on cold due to the absence of a spark due to carbon deposits on the electrode and their corrosion. As a result, the gap either decreases or increases.

Checking the spark plug in an idle chainsaw

Checking for a spark is fairly easy. This will require:

  • Remove the tip of the high-voltage wire;
  • Unscrew the candle;
  • Put the tip back on;
  • Lean the candle with a skirt to the cylinder;
  • Start with a starter.

If a good spark is observed between the electrodes at the time the chainsaw engine starts, then everything is in order with the ignition unit. If it is not there, then it is worth cleaning the element itself and checking the gap of the electrodes. If necessary, using a special probe Adjust the distance between the contacts.

There may be no spark on the spark plug for other reasons. Of the main faults that affect the poor start of the chainsaw and the unstable operation of the internal combustion engine at idle, which the tool can stall, include the following:

  • Overfilling the spark plug channel with fuel;
  • Lack of contact between the high-voltage cradle and the tip of the candle;
  • Failure of the ignition unit.

How will a cold chainsaw start if the candle channel is constantly flooding with gasoline? To eliminate the problem at the time of starting the tool, you can use the following algorithm:

  • Unscrew the candle with a special key;
  • Wipe it with a clean and dry cloth;
  • Dry for 20. 30 minutes;
  • Remove carbon deposits with a file and adjust the gap between the electrodes;
  • Drain the remaining fuel from the spark plug channel and dry it;
  • Collect everything and try to start the mechanism.

If there is no spark and poor contact of the high-voltage tube with the spark plug tip, check the connection. The check can be done using a conventional tester. If a defect is found and it is eliminated, the chainsaw should start without any problems.

If the check showed that the contact is reliable, and the saw does not start further, look for the cause in the ignition unit. As a rule, a faulty unit cannot be repaired or restored. A complete replacement is required here.

Checking the condition of the fuel and air filters.

If everything is in order with the fuel quality, the chainsaw engine may not start due to clogged fuel and air filters. To diagnose THESE elements, it will be necessary to perform a number of manipulations associated with their dismantling.

For the fuel filter:

  • Disconnect the gasoline supply channel from the carburetor;
  • Let’s pump fuel.

If there is little or no pressure in the pipe, disconnect the filter. Before that, empty the tank from the mixture and remove the filter element itself. Dismantling is done with a wire hook. A clogged replacement cartridge, which has become a prerequisite for poor starting of the chainsaw engine, can be cleaned, but it is best to replace it with a new one. When using the tool in dusty conditions, it should be cleaned on a regular basis.

A clogged air filter can be a prerequisite for the unstable operation of the chainsaw engine, due to which it will stall or difficult to start. Dust and dirt deposited on the adsorbent material make it difficult for air to enter the system, make the fuel mixture so rich that it will sometimes be difficult to start the tool.

Checking the air filter is one of the first steps in finding the cause of a poor start.

Care should be taken when removing the air filter, as dust accumulated on the surface of the saw during operation can enter the carburetor. And this is fraught with more expensive repairs. After detaching the cartridge, thoroughly clean it from accumulated dirt and rinse with adding detergent. Dry the element and put it back in place just as carefully.

Identification and elimination of obvious chainsaw malfunctions.

To determine the reason why it does not start or stalls when starting the chainsaw, it is necessary to troubleshoot the tool. The essence of the procedure is to consistently inspect the condition and operation of the main working elements of the saw motor. At this stage, we check:

  • Spark plug present;
  • Fuel supply;
  • Filter status;
  • The operation of the breather of the stalling unit built into the fuel cap;
  • Discharge duct function.

What to do if the chainsaw continues to start?

If the initial inspection did not give anything or the defects were eliminated during the search, and the chainsaw does not start further, then you need to look for more serious reasons. It is best to identify and eliminate such breakdowns in a service center. However, with experience, you can find and eliminate them yourself. What to diagnose and check?

  • Compression in the cylinder;
  • Compression in the crankcase;
  • Carburetor operation.

In the first case, checking the compression in the cylinder will make it possible to find out the state of the cylinder-piston group (CPG) of the chainsaw of those who DO NOT WISH to start cold. For this you need a compressometer. The device is screwed into place of the spark plug and the engine is idle. The measurement shown allows you to judge the state of the CPG. In the absence of a compressor, the compression in the cylinder can be determined offhand as follows:

  • Place your finger on the candle hole;
  • Try to start the chainsaw engine.

Put your finger on the spark plug hole and pulling the starter, you can check the compression in the cylinder

If you feel that your finger is pulling strongly into the candle channel, then the compression is all right. The absence of vacuum in the chamber indicates a malfunction. The cylinder-piston group needs a more detailed inspection, which will give an idea of ​​the condition of the piston and cylinder, piston rings and bearings.

The chainsaw may not start on a cold one due to the lack of compression in the engine crankcase. The main prerequisite for this is damage to the gasket placed between the cylinder and the crankcase. It is quite easy to detect the lack of compression:

  • Disconnecting the top tube from the carburetor;
  • Pour gasoline into an ordinary cork;
  • By immersing the removed tube in the fuel;
  • Tugging the starter several times.

If the fuel from the cap is sucked in when starting the chainsaw starter, then everything is in order with the compression. If not, see the gasket.

If the fuel is drawn in, then everything is in Pryadko. the gasket is intact. Otherwise, you will have to purchase a repair kit and replace it. See how to do it. Why the Chinese chainsaw won’t start:

Starting the tool can be complicated by improper operation of the carburetor or its breakdown. It often happens that during the sawing process the fastening screws loosen and air is sucked into the cylinder. Check that the carburetor is securely attached. Inspect it for fuel leaks. There can be a lot of reasons for the malfunction. It is possible to pinpoint the malfunction, eliminate it and fine-tune the carburetor only in a service center.

After going through the step-by-step troubleshooting of the chainsaw engine, you can find the malfunction, fix it yourself and successfully start your working tool. DO NOT take on jobs that you are NOT confident in. Trust the troubleshooting to specialists from the service center.

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Reasons why the petrol trimmer won’t start

There are various reasons why the petrol trimmer won’t start:

  • The most common reason for a breakdown lies in the wrong choice of fuel. Often too thrifty users of the device fill the tank with something dubious, but NOT fuel with a normal octane number. Low-quality fuel that has been kept in a plastic Canister for a long time has a Terrifying effect. The device, which has lost its functionality for this reason, is sent to a complete bulkhead of the mechanism.
  • There is another common situation where the petrol trimmer starts and stalls. The problem could be the spark plug or air filter. In the first case, after inspection it will be found that the candle is “thrown”. This happens even if it has been recently wiped and dried. If everything is in order with the candle, then it is worth inspecting the air filter. Most often it turns out to be oily and needs to be replaced. If the device still refuses to start, then the problem lies either in a faulty ignition coil or in a clogged muffler.
  • The device can deteriorate Not only due to low-quality fuel, but also due to improper handling. For example, the fuel is checked, there is a spark, but the device will not start. The cause may be a candle filled with gasoline. To correct the situation, you just need to unscrew the candle, wipe it, dry it and check for operability.
  • Sometimes there is such a situation. the gasoline trimmer Will not start when the plug is dry. Then it is necessary to lubricate the threaded connection with gasoline. It should be slightly damp, otherwise nothing will catch on fire.
  • Often, the owners of the device find themselves in a situation where the gasoline trimmer does not start well when hot. Some technicians claim that the problem lies in the ignition coil. Therefore, it needs to be changed, and the device will work. But the problem may also be overheating of the engine, especially if a reinforced circular saw blade was attached to the device. To avoid such situations, you should carefully study the instructions, which specifically describe what types of disks can be installed.

The reasons when a new petrol trimmer won’t start can be the most commonplace, for example, Inability to use the device. If the user stores it correctly, uses high-quality fuel and does NOT leave gasoline in the trim tabs, then the unit will serve faithfully for a long time.

Filter check

Another common condition that the trimmer won’t start is if there is a blockage in the filter area. To confirm the guess, it is enough to dismantle the indicated block and try to start the unit without it. If the trimmer engine starts, you will most likely need to replace the air filter or at least thoroughly purge the old one. If there is heavy dirt on the surface of the filter element, a new mesh must be used. When resorting to such actions, do not leave the suction pipe completely without a filter. After all, haste in this case can lead to the need to repair the entire piston group of the engine unit.

Why won’t the petrol trimmer start? Causes and their elimination

In the near future, the gasoline trimmer acquired the status of the 1st of the main tools in the arsenal of summer residents. And this is logical, because a motorized scythe allows you to quickly put your personal plot in order. But from time to time it happens that the trimmer does not start on hot or even cool. In such situations, it is necessary to establish the cause of the malfunction without the help of others. Let’s figure out what to do if the trimmer won’t start. The reasons that most often lead to such troubles will be discussed below.

Chinese lawn mower won’t start.

Spare parts for Chinese lawn mowers The Chinese lawn mower will not start. it

It is recommended to dry the candle channel for at least half an hour. However, in no case should you resort to calcining its elements. After all, heating the spark plug can lead to its final damage. What to do if the maintenance of the functional unit was carried out in accordance with the above recommendations, but the trimmer does not start, there is a spark? In this case, it is worth treating the threaded connection with gasoline. The latter does not need to be abundantly impregnated with fuel. It should only be slightly damp. Resorting to such actions should be taken to ensure ignition. After all, no matter how strong the spark the candle gives, there will simply be nothing to ignite in an absolutely dry chamber.

If even in this case the trimmer does not start, it is worth assessing the quality of the contact between the high-voltage wire and the candle. In the absence of a spark (if there is a reliable connection between the indicated elements), the problem is most likely caused by a breakdown of the ignition unit. In this situation, you will have to turn to the services of the wizards who will reinstall the node.

Troubleshooting

  • Engine failure (piston wear, bearing failure, crankcase cracked),
  • Malfunctioning fuel mixture. clogged air filter pores or carburetor malfunction,
  • The ignition system does not work,
  • Mechanical malfunction. leaking hoses, broken braided wires, ruptured tubes.

the lawn mower cannot work for a long time. The gearbox and engine will overheat. Mows Can be no more than 15 = 20 minutes, taking a five-minute break. On sultry noon, the operating time is cut in half. When mowing weeds, sedges, the working time is required.

If the launch fails, we start looking for the reason for the failure:

  • Check fuel quality,
  • Make sure that the candle is working and the candle channel is clean,
  • Check the cleanliness of the air filter,
  • Make sure the fuel filter is not clogged,
  • Check the cleanliness of the breather,
  • Cleans the outlet.

complex causes will be found during the diagnosis of malfunctions leading to overhaul of the carburetor. Such reasons include clogging of the internal channels of the carburetor, wear of the gasket on it and a violation of the tightness of the internal Holloway with a loss of vacuum. Do-it-yourself lawn mowers repair, if it won’t start, will take patience.

The lawn mower 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 a new saw just bought does not start, and it starts running around the service centers, in such cases it is recommended:

Read the instruction manual carefully;
study in detail the method of first starting and running in lawn mowers;
try to understand how the product works;
how is pumping gasoline and so on.

Causes of malfunctioning lawn mowers:

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

Need help, advice, hot Won’t start HY 30.СС

If the fuel by itself then leaves, then returns, there is a possibility that the pressure in the line is to blame (sometimes excessive, sometimes insufficient) and it seems that it is connected either:
a) with temperature. Maybe the fuel boils while driving due to engine overheating? What temperature after a long ride?
B) or over time. Then it is possible that somewhere something is hammered. Not fatal, but still. For example, air filter (dust, excess oil on it), drainage in the tank cap, fuel filter, pinch the fuel pipe, etc. As a result, it sucks fun, but it can’t be fast)))) Or maybe the fuel pipe is punctured, then on the contrary it sucks in air instead of fuel. On a cold one, it can be squeezed better and does not suck so well, but on a hot siphon.

PS Purely from theory, a hot engine is more difficult to start if the mixture is too rich. And to start a cold engine, on the contrary, this is a plus.
Turn out the candle and if it is all soot or filled with fuel, then you need the poor. And try the iridium candle. With a problem engine, it works a little better, especially when overflowing.

If the fuel by itself then leaves, then returns, there is a possibility that the pressure in the line is to blame (sometimes excessive, sometimes insufficient) and it seems that it is connected either:
a) with temperature. Maybe the fuel boils while driving due to engine overheating? What temperature after a long ride?
B) or over time. Then it is possible that somewhere something is hammered. Not fatal, but still. For example, air filter (dust, excess oil on it), drainage in the tank cap, fuel filter, pinch the fuel pipe, etc. As a result, it sucks fun, but it can’t be fast)))) Or maybe the fuel pipe is punctured, then on the contrary it sucks in air instead of fuel. On a cold one, it can be squeezed better and does not suck so well, but on a hot siphon.

PS Purely from theory, a hot engine is more difficult to start if the mixture is too rich. And to start a cold engine, on the contrary, this is a plus.
Turn out the candle and if it is all soot or filled with fuel, then you need the poor. And try the iridium candle. With a problem engine, it works a little better, especially when overflowing.

Checking the fuel mixture

Let’s say your trimmer won’t start. In this case, the first step is to check whether there is enough fuel in the tank, and also to assess the quality of the fuel mixture. It is necessary to refuel the motorized unit with exclusively high-quality gasoline. It is recommended to use fuel, the grade of which is NOT lower than AI-95. Filling the trimmer with fuel of unknown origin not purchased from a gas station can cause frequent tool malfunctions. This can cause damage to the piston-cylinder system. Repair in this case often exceeds the cost of the device itself.

Why won’t the petrol trimmer start? Improper preparation of the fuel mixture, which consists of oil and gasoline, can also lead to this. The proportions in which these components are connected are indicated by the manufacturers in the trimmer instruction manual. Preparing a fuel mixture is highly discouraged in large volumes, that is, for the future. Indeed, with long-term savings, there is a loss of the determining properties of the substance. Therefore, if the trimmer does not start, it is worth draining the old fuel and using a freshly prepared fuel mixture.

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