The lawn mower will not start. Putting the petrol trimmer into operation after a winter standstill
The summer season is coming and it’s time to improve your own plot. Modern technologies allow you to forget about the difficulties of owning a peasant scythe, and now you can use a neat and powerful gasoline unit to clear the land from excessively lush vegetation.
What to do if your lawn mower won’t start
Three simple steps, in less than ten minutes, can get your garden equipment back on track.
1. Changing the fuel in the tank
Often, the lawn mower left for a long time, and does not start precisely because of the use of last year’s gasoline. The last mowing occurs at the beginning of September, after which the item is removed to the farthest corner and covered with a veil of dust. The fuel has a clearly defined shelf life, and this is clearly manifested in the sensitive engine of lawn mowers.
2. Check the condition of the spark plug
To do this, you will need a candle key, the availability of which is guaranteed for every motorist.
The plug, located in the center of the lawnmower’s engine housing, is carefully unscrewed. It is quite possible that during last year’s operation and long winter downtime, a layer of plaque (carbon deposits) may form at the base of the candle.
You don’t need any supernatural tools to clean the candle. Can be easily handled with a small file, women’s nail file or nail scissors. Remove plaque carefully and meticulously, taking care NOT to damage the surface of the candle.
The condition of the gap after cleaning can be checked with any coin. Its thickness corresponds to the standard thread clearance value. 0.9.1.1 mm.
In the most advanced cases, the candle will have to be replaced.
3. Inject fuel inside
If, after the above manipulations, the lawn mower still does not start, but you are sure of its performance, then the last mayor remains before visiting the mechanic. It is likely that the initial supply of gasoline is difficult, and even a working candle cannot develop a Spark from scratch.
You can check this by the condition of the candle: its threaded base must be wet. If everything is dry. Means, fuel is NOT supplied.
Before returning the Cleaned Candle to its place, use a pipette to moisten the socket with a few drops of gasoline. Screw the spark plug back using the above spark plug wrench. Do NOT over-tighten the threads under any circumstances. The candle should become soft and even.
After turning on the lawn mowers, DO NOT get to work immediately, although the temptation is great. The mechanism should be idle for a couple of minutes.
This is necessary because some time after switching on, any mechanism goes through a running-in stage, when the dynamics of wear is maximum, and the additional load will accelerate the moment of failure. After the running-in stage, a period of steady-state wear begins, and friction between the parts is reduced to normal limits.
Wish your instrument a long life. Always give the motor time will start work.
If, after all the measures taken by the mayor on his own, the lawnmower still does not start, we recommend that you contact competent specialists. Problems with the operation of such equipment in 80% of cases lie inside the engine. This unit contains the same 80% of the cost of the entire lawn mowers, and it is better to entrust the responsibility for its resuscitation to a professional.
Why gasoline does not flow in the chainsaw?
Carburetor needle. On cheap chainsaws, the needle in the carburetor often sticks, which prevents fuel from flowing. Sometimes it is enough just to move the needle and insert it correctly.
Oil seals. Chinese and even branded chainsaws may have poor-quality oil seals with poor tightness. Fuel stops flowing when the fuel mixture begins to squeeze out through the oil seals. Gasoline leakage is quite possible through oil seals.
Poor quality gasoline
Every experienced chainsaw user knows that fuel should not be left in the tool reservoir for long. The fact is that during long-term storage inside the tank, unnecessary processes will occur with the formation of resin and polymerization of various components. Do not leave fuel in the tank for more than 2 weeks, and even if your tool is started with such fuel, it can lead to the formation of carbon deposits on the parts of the CPG (rings, piston).
If gasoline is NOT supplied to the carburetor in chainsaws, pay attention to the type of air filter. Because of his improper work, the unstable operation of the chainsaw begins, which in the future is difficult to start or stalls during operation. Air is harder to enter the device and makes the mixture too rich. You can hardly start it, and a prerequisite for this is the formation of dust.
It is necessary to remove the air filter carefully, because if dust is stored on it, it can crumble into the carburetor. The air filter will clean well enough with water and detergents. Be sure to dry the filter before installing.
Gasoline does not flow into the chainsaw: solution to the problem
There can be many breakdowns associated with a chainsaw, and it can be quite difficult to solve some. If you have been working with this gasoline tool for a long time, you have had a problem when gasoline does not enter the carburetor or does, but it is very difficult and does not allow the chainsaw to start normally. Fortunately, experts have long found the reasons for such a breakdown and therefore we have compiled the main methods of repair.
First of all, we check for commonplace reasons, for example, the presence of gasoline in the tank. If there is one, we check the process of supplying fuel from the tank through the wire. To do this, it is enough to disconnect the gas lines from the carburetor and try to pump fuel. Fuel supply through the jerk hose will be correct, this will make sure that there are problems with the gas tank. If fuel is NOT delivered even in a jerk or drips too slowly, the reasons may be as follows:
The fuel filter is lost with dirt and dust;
The petrol channel is dirty.
Surprisingly, even having a full tank can be a prerequisite for NOT getting fuel. Therefore, try NOT to fill the tank to the maximum. An overfilled fuel tank can pressurize the tube that connects to the carburetor.
It is the breather that plays a serious role when starting a chainsaw; you can find such a part near the gas tank cap, or rather in the area of the air hole. The breather plays a simple but important role. Prevents fuel from escaping and sets the correct air pressure. It is thanks to this air that the fuel enters the carburetor, and the malfunction of this element is a frequent prerequisite when the fuel does NOT enter the chainsaw. Impaired breather operation will create negative pressure, from which gasoline will not be able to flow to the carburetor when trying to start the tool.
It is quite simple to check the breather function, Disconnect the gasoline pipe from the carburetor and check how the fuel flows. If the gasoline flows in a small stream, everything is in order, if it does not flow at all. The breather is rather clogged with mud. If done correctly, you can clean the part, sometimes it is easier to replace it with a new one. The cleaning procedure is performed either by hand or with a strong jet of compressed air.
This filter cleans the fuel from possible contamination. If it is clogged, then gasoline does NOT enter the cylinder, and, accordingly, the unit does not work or stalls after starting. The fuel filter is located at the end of the intake hose inside the fuel tank. To get to the filter, you need to remove the plug with the tubes coming out of it.
When removing the plug, the suction hose may come off and remain in the reservoir. It is removed with tweezers.
Next, remove the old fuel filter from the hose and replace it with a new one purchased in advance. You can also clean the fuel filter if you have a new one. The filter must be secured to the hose with a spring clip.
Install the intake tube on the plug and insert the last into the tank.
We carry out diagnostics of the candlestick and candlestick channel
If the quality of the fuel mixture is undeniable and petrol stops at startup, a prerequisite may be a flooded candle. Here, a regular candle wrench is used for repairs (every car enthusiast probably has it), and an additional candle is suitable for it.
- We unscrew the candle and wipe it off;
- Carefully Dry (do not burn)
- Excess fuel in the chamber is drained through the plug hole and dried;
- The old candle is cleaned of the deposit with a nail or a lady’s file;
- We open the gap at a distance of 1mm (you can check any coin)
- We put everything back in place and try to start the trimmer.
complex causes of petrol pump failure
If step-by-step troubleshooting does not work and your outer jacket still does NOT start or stops, you should inspect the carburetor and engine itself. A dirty carburetor can be one of the causes of unstable tool performance. Here we can distinguish three main problems:
- Clogged channels or jets. All this is cleaned by special flushing or blown by a powerful jet of compressed air from the compressor. DO NOT use needles or wires as the cross-sections can be damaged;
- Worn carburetor gasket. The result is the replacement of the defective gasket.
- Violation of tightness. To check this indicator, you can use a regular home blood pressure monitor by replacing the appropriate pressure gauge. Watch the readings: if they do not change. Everything is in order, and if the pressure starts to drop, then some parts of the carburetor are faulty. I have to find it and replace it with a new one.
If the carburetor is OK, the petrol trimmer may NOT start due to wear on the piston group. If chips, scratches or scoring are found, they should be replaced with a piston or cylinder. Piston rings are optional. Slight piston deflection when the connecting rod wiggles indicates that it is time to change the rings. This procedure is best entrusted to a service technician.
Malfunctioning electrical trimmers
Since the device of an electric mower is much simpler than a motor trimmer, there are few reasons for its failure.
Basically, the trimmer stops working normally in the following cases:
- Faulty electrical cable;
- The control button is faulty;
- Burnt out motor stator winding;
- Breakage of contact connections on the engine.
If the compression is insufficient, then start the engine, in most cases, will not work. To check the compressions, you can use a car compressor.
- Unscrew the spark plug from the internal combustion engine cylinder.
- Screw the compression gauge in its place.
- Begin to pull on the starting cord as you would when starting lawn mowers. Do this until the arrow on the measuring device stops moving upward. This value will show the compression force of this engine.
What compression should be? Normally, the compression should NOT be lower than 8 kg / cm 2. Although even at 8 kg / cm 2, some engines do not idle and stall, since the fuel is not pumped sufficiently. In case your lawn mower does NOT pump above 8 kg / cm2, you will have to check the cylinder, piston and rings.
Also, poor compression can be due to poorly tightened carburetor. Check if he is wobbling. If so, well tighten the fasteners holding it. Also, if the carburetor is poorly screwed on, you may notice that gasoline drips during operation.
If he puts a cable instead of a fishing line, without the possibility of releasing it, securely fixing the two ends of the cable and cutting them off by welding (a drop of metal melting keeps the cable from opening). Grass is such a tool knocks down at a time. Cuts off shoots up to about a finger thick. Not as afraid of stones as a disc. There is, however, a problem: when worn, pieces of cable threads break off, and these twisted wires remain in place of the Mowing. If stepped on, you can get hurt.
But the pieces of the rope left on the field. This is not so bad. The fishing line, breaking off, weakens the dynamic shocks on the transmission and the engine; the cable does NOT give such an opportunity. The result is rapid wear on lawn mowers.
1. Malfunction of the fuel pump
Figure: 1. Fuel pump diagram: 1. Drive cam; 2. Pusher; 3. Lever; 4. Balancer; 5. Stock; 6. Inlet valve; 7. Spring.
To detect this malfunction, it is necessary to remove the fuel supply hose from the carburetor fitting and place it in a container (bottle, can), then remove the connector from the Hall sensor of the distributor (systems with electronic ignition) or the ignition coil armored wire (contact ignition) from the distributor (central wire ) and through the spark plug, connect it to mass, then turn the ignition key and turn the starter for 5-10 seconds.
As a result of this measure, gasoline from the fuel hose must partially fill the container, if this has not happened, and the fuel wires and the fuel filter have sufficient throughput, then it follows that the gasoline pump is faulty and requires replacement and therefore gasoline does NOT enter the carburetor of the VAZ 2109 and second brands of cars with a carburetor engine.
How to repair a gas pump with your own hands:
What you should pay attention to when replacing the fuel pump
When replacing the gasoline pump, please note that the pressure in the power supply system of the carburetor engine should be 0.25-0.45 Bar, the measurement is made with a pressure gauge installed in the fuel supply line, between the carburetor and the gas pump, the pressure is regulated by gaskets of various thicknesses installed under the gasoline pump. If the pressure is below 0.25Bar, the engine will not develop maximum power, and if it is more than 0.45bar, then it is possible crushing needle valve and carburetor will flood gasoline.
For some reason, gasoline is not supplied to the carburetor. Gasoline is NOT supplied to the carburetor of VAZ 2109, 2107, 2106. Reasons and their solution
In this article we will solve your problem with the supply of fuel to the carburetor and find out why gasoline is not supplied to the carburetor VAZ 2109, 2107, 2106.
2. Clogged mesh filter
Figure: 2. Mesh filter in the Solex carburetor
In carburetors Ozone and Solex, this malfunction is eliminated by flushing the mesh filter in acetone and blowing it with air, or replacing it with a new one, which in my opinion will be a more correct solution, because the cost of this filter is NOT high and the problem with gasoline NOT supplied to the carburetor will be solved.
The filter is located in both types of carburetors, next to the fuel supply connection, in Ozone this is a plug under the supply connection, and in Solex, you can Unscrew the fitting itself, or the plug opposite. This malfunction does not occur often, since an additional filter is usually installed in the fuel system, which traps debris into the carburetor.
Useful for replacing and purging the carburetor fuel filter:
3. Jammed needle valve in closed position
The reason why there may be NO fuel in the float chamber. This is a jamming of the needle valve in the closed position. For Soleksov repair consists in installing a bridle connecting the float and the valve needle, if the malfunction appears again, then the valve should be replaced with a new one.
Filter diagnostics for lawn mowers
Another prerequisite for stalling a gasoline scythe may be an air filter. To eliminate it, try removing the filter and starting the trimmer without it. If it works out, then you will have to change the air filter to a new one, or at least blow and thoroughly clean the old one.
The petrol trimmer may not start due to a dirty fuel filter. 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 inlet without a filter at all, this is prohibited by any instruction manual. Haste can turn into repair of the engine piston group.
We carry out diagnostics of the candle and candle channel
If the quality of the fuel mixture is not in doubt, and the lawn mower stalls when starting, then a flooded candle may be a prerequisite. Here, an ordinary spark plug wrench is suitable for repairs (every motorist probably has) and a spare candle.
- We unscrew the candle and wipe it;
- Dry it thoroughly (not cost if ignited)
- Excess fuel in the chamber Drain 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 set a gap with a distance of 1 mm (you can check with any coin)
- Putting everything back in place and trying to start the trimmer.
If the candle is working, the socket where it is located is completely dry, and the lawn mower does not want to start, lubricate the threaded connection with gasoline. It should be slightly damp. No matter how wonderful a spark the candle gives out, there is simply nothing to light up 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 weak contact between the spark plugs and the high-voltage wire. If the connection is good and there is still no spark, most likely you have flew ignition block. Here you will NOT be able to do without a master, since the part is not repaired, but sold as a single unit.
Why the lawn mower won’t start. Troubleshooting
Caring for the personal plot, summer residents periodically encounter the fact that the lawn mower does not start. There are many reasons for tool failure. To correctly diagnose the problem, the owner of a useful unit in the country needs to know the device and the principle of operation of its SEPARATE parts.
- How to start diagnosing lawn mowers
- Checking the fuel mixture
- We carry out diagnostics of the candle and candle channel
- Filter diagnostics for lawn mowers
- Breather and exhaust port
- complex reasons for lawn mowers failure
- Rules for the operation and storage of lawn mowers
complex reasons for lawn mowers failure
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 or wires as the bore may be damaged;
- Worn carburetor gasket. Output. Replacing a failed gasket
- Violation of tightness. To check this indicator, you can use an ordinary household tonometer, Replacing a suitable pressure gauge on it. Watch the readings: if they do not change. Everything is fine, but if the pressure starts to drop, then some carburetor part is faulty. We’ll have to find it and replace it with a new one.
If everything is in order with the carburetor, then the gasoline trimmer may NOT start due to wear of the piston group. Replace the piston or cylinder if chips, scratches or scuffs are found. Piston rings are subject to mandatory checks. A small LUF of the piston when the connecting rod wiggles indicates that it is time to change the rings. This procedure is best entrusted to the specialists of the service center.
How to start diagnosing lawn mowers
If the lawn mower 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;
- Exhaust channel.
These nodes are most often the source of the main problems, which can be eliminated after a thorough inspection.
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 “don’t be smart 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). Prepares the oil-fuel mixture strictly according to the instructions. We calculate its amount based on real needs. Excess gasoline left over after work loses its quality over time.
Renovation work. What causes the fuel NOT to enter the cylinders? 4 reasons
Why does NOT fuel flow into the cylinders? Surely, many motorists would like to know the answer to this question. In this article we will consider several reasons for this phenomenon.
It happens that the power unit of the machine does not start up due to the lack of fuel in its cylinders. over, this problem is typical both for engines with a carburetor power system and for injection units. Why do such situations happen, and how to deal with them?
Why does NOT fuel flow into the cylinders? The reasons:
So the first and simplest reason. This is the absence of fuel in the fuel tank. It can be triggered by its damage, when all the fuel simply flows out. In addition, fuel lines can be damaged and gasoline does not reach the power unit.
Another reason why fuel does NOT enter the cylinders. Failure or interruptions in the operation of the fuel pump. A mechanical pump is used in carburetor machines, and in injection ones. Electric. However, each of them can break. The first weak point. Membranes, and the second fears work dry. In addition, a break in its supply wire may occur. Mechanical pumps can often fail in extreme heat. In this case, pumping of fuel is not carried out at all.
Another problem with electric pumps can be insufficient pressure in the fuel line created by them. In total, the on-board electronics does NOT supply fuel to the cylinders, as the pressure in the fuel system is insufficient. It is difficult to diagnose such a malfunction in the field, therefore you will have to seek help from specialists.
Another common reason that fuel does NOT enter the cylinders. Clogged fuel filters. Electric pumps have mesh filters in the fuel tank itself. They can become clogged over time and interfere with the normal intake of fuel. In addition, any unit is equipped with a fine filter for incoming fuel. over, with its strong clogging, it is possible to completely block the flow of fuel.
Carbureted cars also have a filter at the carburetor inlet. If it is clogged, problems with starting and fuel supply are also possible. In any case, clogged filters must be thoroughly cleaned or completely replaced (if possible).
A rare, but still occurring phenomenon. Serious clogging of the carburetor or the nozzles of the injection motor. In addition, the carburetor can have very low fuel levels in the float chamber.
As you can see, there are many reasons why fuel does NOT enter the cylinders. However, most of them can be easily eliminated even in the field without the help of service workers.