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.
Pours a candle on lawn mowers
- Use a candle key to unscrew the candle and check its condition. If the candle is wet and there is a spark, then it has been filled. Open the air damper, turn on the switch button, squeeze out the gas all the way and start. Excessive gasoline should come out of the exhaust saw and the saw will start.
- Use a candle key to unscrew the candle and check its condition. If the candle is wet and there is a spark, then it has been flooded. Turn the chainsaw with the spark plug hole down and turn the starter 10 times, with all this excess fuel will flow out of the engine cylinder. Then wipe dry (bake) the spark plug, or change it to a newer one and try starting the engine again exactly following the instructions for use. If the plug is completely dry, it means that no fuel is supplied to the engine. And because it is in the tank, there may be a problem in the carburetor. You can draw a little consistency into the syringe, inject it into the cylinder, tighten the candle and try to start the engine. If the engine starts up in this matter, it stalled, how should the discrepancy remain and you need to contact the service center.
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Gardening tools are probably useful and effective, but there are times when the equipment refuses to work. Among them was a trimmer, which has the option to mow both a small meadow and large lawns.
There are various prerequisites for why the petrol trimmer won’t start:
- The most common reason for a breakdown lies in the wrong choice of fuel. Often, very economical device users fill the tank with something incomprehensible, but NOT fuel with the usual octane number. Bad fuel that has been kept in a plastic canister for a long time has a Terrifying effect. The device, which has lost its functionality, therefore, sailing off to a complete bulkhead of the mechanism.
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.
Breather and exhaust port
Often, gentle branded lawn mowers DO NOT start and stall due to a dirty breather. The main function of this element. Equalizing the pressure in the gas tank. When this unit becomes clogged, a vacuum is created in the tank, preventing the supply of fuel. Eliminate the problem by cleaning the breather. You can use a regular needle for cleaning.
Normal operation of streamers with internal combustion engines may be impaired due to dirt entering the exhaust duct or clogging of the muffler 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.
Wet spark plug on the gas trimmer. Flooded engine.
Surely many people using small motorized equipment know what it is flooded spark plug on the engine and what unpleasant situations arise because of this. Very often, using newly acquired equipment, many do not check the condition of the spark plug electrodes after updating the fuel and lubricants, and remember this only when the first malfunctions appear.
Fuel system malfunctions Stihl 180
In some cases, as a rule, if there is a spark on the spark plug, when examining it, you can see that it has a wet coating, this indicates an excessive supply of fuel to the combustion chamber and, as a consequence, the impossibility of igniting the fuel mixture.
Fuel line diagnostics
Typically, the diagnosis of the fuel supply system begins with checking the condition of the fuel filter. To do this, unscrew the tank cap and using an aluminum wire bent at the end, remove the fuel hose from the tank, with a filter at the end.
Having taken out and dismantled the filter, you can try to blow into it, if the air does NOT flow, then the problem has been found. If everything is in order, then you need to check the system for clogging.
To check the fuel supply hose, you must disconnect it in the place where it connects to the carburetor, and then blow into it. The clogged hose can be mechanically cleaned, if this is not possible, replace with a new one.
In the event that the supply hose and the fuel filter are normal, and the fuel supply is not observed, the reason may be hidden in a malfunction of the air pulse to the fuel pump.
Algorithm for checking for lack of fuel supply
- Unscrew the candle;
- Using a syringe, pour 1-2 cubes of the fuel mixture into the candle hole;
- Install the candle and put on the high-voltage wire cap;
- Set the engine control lever to the hot start position;
- Pull the starter several times.
If, after several movements with the starter, the Stihl 180 chainsaw started up and immediately stalled, then the suspicions of the lack of fuel supply were confirmed and you can proceed to further diagnostics of the fuel line.
Algorithm purging engine
Important: do not under any circumstances purge engine with ignition on and near open flames.
- Unscrew the candle;
- Turn the Stihl 180 chainsaw upside down and drain off excess fuel;
- In an inverted state, pull the chainsaw starter several times (this way, under the influence of compression, excess fuel will be removed from the cylinder)
- Install the plug and the cap of the high-voltage wire in place;
- Set the engine control lever to the hot start position;
- Pull the starter several times and start the engine.
If everything is in order with the Stihl chainsaw and the cold start algorithm was simply violated, then after purging it should start. Otherwise, the fault must be looked for in the carburetor.
There are sparks on the Stihl 180 Chainsaw
The main malfunction due to which the stihl ms 180 chainsaw does not start may be the absence of a spark between the electrodes on the spark plug. Symptoms of this malfunction can be found by unscrewing the spark plug and inspecting it. Having discovered during inspection that the spark plug is wet, it is necessary to start looking for the reason for the absence of a spark on the spark plug.
There is no clearance between the flywheel and the ignition module
In some cases, the absence of a spark on the spark plug is explained by an incorrect gap between the contacts of the ignition module or the flywheel. It may be larger, or it may not be at all, and then scratches will be observed on the surface of the flywheel as a result of contact with the contacts of the coil.
Check and set the gap, rather than having a special tool. Can. To do this, you will need to remove the starter, loosen the two screws securing the coil and lay a plate cut from a plastic bottle between the flywheel contacts and the ignition module, tighten the module fastening screws.
If, after such adjustment of the gaps, a spark appears, everything is in order, you can continue to work with the Stihl 180 chainsaw, if not, you need to re-inspect and check if the flywheel does not touch the coil contacts again. Suppose, as a result of the check, it was found that after adjusting the gap, it was gone again. So the reason is most likely in the crankshaft bearings.
Reasons why he pours a candle on a chainsaw and how to eliminate them
It is often the case that trying to start a new chain saw does not produce the desired result. In most cases, this is due to the fact that the fuel mixture does NOT ignite, but fills the candle on the chainsaw. This situation is NOT a product defect and can be corrected on your own. The saw is equipped with a two-stroke gasoline engine, the stable operation of which depends on a properly prepared mixture of fuel and engine oil. In the carburetor, the emulsion is enriched with air and enters the cylinder, where it should be burned.
The consequences of flooding
The element responsible for igniting the fuel mixture is a spark plug. It consists of a body and a central electrode. TO skirt parts are welded with a side electrode, which is in electrical connection with mass car. Due to the presence of a ceramic insulator, the electrodes are not in contact with each other. The high voltage applied to the plug leads to the breakdown of the air gap. A spark jumps between them.
The main condition for sparking is the absence of an electrical bridge between the electrodes. If the spark plug is wet, a circuit with low resistance is created. This leads to a sharp drop in voltage due to its leakage to the case.
If the chainsaw does not start after a long rotation of the manual starter, then there is a high probability of a candle flooding. Wipe a wet candle with a clean cloth and blow it with air. It is not recommended to ignite it over a fire, because. This leads to the formation of microcracks on the insulator. After cleaning, check the performance of the element. If there is a spark, then it is installed in place and the engine is started. In the event that there is no spark on the candle, then it is replaced with a workable.
Why is pouring a candle in a chainsaw
There are several reasons for this situation. In most cases, they are associated with incorrect operation of the fuel system, less often. With a defect in the spark plug itself or malfunctions in the ignition system. On sale, the products come with the factory settings of the elements. Therefore, it immediately adjusts the carburetor and ignition system. Not worth it. Most likely users did NOT read the instructions or did not follow its requirements.
The manufacturer recommends closing the air damper when starting the chainsaw. But this does NOT mean that the engine will work in this state. The rotation of the recoil starter must be stopped when the first exhaust appears. After that, the flap must be opened. If this is not done and continue to crank the starter. Will fill the candle, and the unburned mixture will collect in the crankcase.
A candle on a chainsaw can be flooded even after several years of good work. In this case, the reason lies in the failure of the control membrane of the fuel chamber. Poor-quality material of the part with prolonged contact with gasoline loses its elasticity and the needle, which is responsible for the fuel supply, remains in the open position.
During the operation of the tool, vibrations occur, which lead to a change in the settings. Because of this, a highly enriched mixture is obtained, which does NOT completely burn out and partially settles on the electrode of the candle. This leads to engine malfunctions and then. To its stop.
What to do
If the chainsaw engine does not start, and there are traces of fuel and oil on the spark plug electrode, it is necessary to establish the cause of their appearance. This will determine what needs to be done to eliminate it. If an overflow of fuel occurs when the unit is started, then it is necessary to remove the fuel mixture accumulated in the engine crankcase. To do this, turn out the candle, turn the chainsaw over with the cylinder down and turn the crankshaft with a manual starter. Such manipulations must be done at least 25-30 times.
After that, the removed part is installed in place and the engine is started in accordance with the annotation for operation. If interruptions occur during the operation of the unit, then this indicates a defect in the spark plug. Over time, the electrodes of the sparking device burn out, resulting in an increase in the gap between them. This results in a faint spark that cannot ignite the fuel.
The gap is adjusted using a feeler gauge. For two-stroke engines, the distance between the electrodes should be 0.7-0.9 mm. Splashing of contacts can occur due to an overly enriched mixture. This leads to a violation of the adjustment of the carburetor or a clogged air filter.
The device is adjusted to warm up the engine. By rotating the screws, the maximum possible stable speed is achieved. If the owner of the unit did not adjust the carburetor, then it is worth contacting a specialist.
The motor belt is damaged. Why the scooter won’t start?
Duma, everyone has come across a situation when, after a winter downtime, the scooter does not want to start. But there are a lot of other situations in which the scooter will not start. In this article we will try to find out all the Possible reasons why the scooter will not start and will try to eliminate them. There are several main reasons that can make it difficult to start the engine.
Let’s get started. The first reason is the most elementary. Check if fuel is entering the carburetor. This can be done by unscrewing the fuel drain screw from the carburetor. If there is fuel in the carburetor, then check its presence in the gas tank, see if the air access pipe to the gas tank is clogged. The fuel filter could be forgotten or the vacuum pump damaged. So it would not hurt to check if the needle is sticking in the float chamber.
If everything is in order with gasoline, then proceed to the second stage. Checking the presence and quality of the spark on the spark plug. We unscrew the candle, connect the armored wires to it, turn on the ignition, lean it against the engine with the metal part and, turning the crankshaft, see if there is a spark. If there is a spark or it is very weak, then it is possible that it is the candle itself. Try cleaning or replacing it. Perhaps the ignition switch, the generator are out of order, the ignition coil has broken. As a last resort, check the operation of the ignition switch.
If there is a spark, then you need to check the compression in the cylinder. This can be done using a special pressure gauge, or simply plugged the hole of the candle with your finger and rotate the crankshaft. With normal compression, the finger should be pushed back with a stream of air. Otherwise, you have problems with the piston. You will have to disassemble the engine and check the condition of the rings, piston, valves, the condition of the gaskets and seals (crankshaft) (they should NOT suck in air).
Often, the engine will not start due to carburetor problems. In such a situation, remove the carburetor and flush it thoroughly. You need to wash the carburetor in clean gasoline, after which you need to blow out all the channels with compressed air. Also, one of the reasons why the scooter does not start is that the air-fuel mixture may be incorrectly adjusted. The mixture may be too rich or too poor.
Do not forget to also check the serviceability of the starting enrichment. Take it off and connect to the battery. After 5-10 minutes, its stem should move forward a few millimeters. Carry out the work after 30 minutes after removing the concentrator.
After checking all of the above reasons, you must definitely find the one that causes the scooter to start. Eliminating it, you can easily start the engine.
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The problem with the fuel composition
If the scooter does not start, there is a spark, there is gasoline, but there is no movement, this is a very serious breakdown. He’s with a working starter, but nothing helps? Perhaps the problem lies in the combustible distribution mechanism. It is better not to repair such breakdowns with your own hands. This requires the hands and eyes of specialists. If you have money, it is better to send the scooter to a service station. There is special equipment that can be used to flash the built-in injector chip (if it is NOT a carburetor engine).
The scooter won’t start for this reason either. Very often malfunctions may occur, based on the wear of the piston complex. An internal combustion engine (two-stroke or four-stroke. It does not matter) consists of several parts: a cylinder, a piston and its pin, as well as piston rings. Deterioration and fraying of parts lead to the fact that the engine loses power and then breaks down completely. It is not necessary to buy a new cylinder, since the old version is quite subject to restoration or boring. It can be made higher than zero. This saves a lot of money.
It is advisable to purchase all components of a new piston in one set when replacing it. This is necessary so that wear in the future occurs evenly, and not in parts. The piston, like the rings with the pin, must work synchronously. Then the likelihood of your vehicle breaking down will be significantly reduced. Any breakdown in the case of an inexperienced driver can seem catastrophic, especially if we have no obvious explainable reasons for what is happening. However, a minimum of knowledge and skills will help identify the reason that prevents you from starting a scooter and leading a full-fledged motorcycle life. Contact a specialist in your auto repair shop or try the recommendations above. Any problem can be solved. Now you can stock up on the information received and figure out in time the reasons why the scooter does not start, and take the necessary measures to reanimate it on your own in your personal garage or under the supervision of an experienced friend.
So, we found out the main reasons for the breakdown of mopeds and how to eliminate them on our own. This is the main question of the article. why the scooter won’t start with the starter can be considered closed.
Principle of operation
Why won’t the scooter start? There can be many reasons for this. From minor engine malfunction to major breakdown.
The moped differs from other types of vehicles in that it is an economical mode of transport. A typical medium scooter has a 50 cc engine, which is unable to burn too much combustible mixture while driving. This explains the fact why he cannot develop very high speeds. The maximum that he is capable of. Move at a speed of NOT more than 60 kilometers per hour. At the same time, the safety of the moped driver is at risk, since no side safety arches, as on full-fledged motorcycles, are provided here. But the reliability and simplicity of the design of this cheap transport are so convenient in everyday use that the scooter has always been, is and will be popular among the people. But even the most unpretentious technique sooner or later starts to junk and let the owners down. And then one day you are faced with the fact that the scooter does not start. This may be due to careless handling and lack of timely technical inspection, as well as objective extraneous reasons, the consequences of an accident, etc.