Gasoline trimmer won't start: causes and remedies

Taking into account the specifics of using gasoline trimmers, their owners often have to deal with certain problems. One of the most common troubles is that the brushcutter will not start or is not gaining momentum. For the fastest and most effective elimination of such a problem, you should have an idea of ​​the main causes of possible malfunctions.

From a technical point of view, trimmers can be classified as complex devices. Based on this, before using them, it is strongly recommended to carefully study the corresponding instructions... However, in practice, many ignore it, often later find themselves in situations where the gasoline trimmer does not start or picks up poorly during operation. It is worth noting that similar problems can be encountered when acquiring new models of equipment.

The key to effective and prompt repair will, of course, be a competent diagnostics of the device. In the process of troubleshooting, you will have to inspect and test, first of all, key elements. The list of these includes candles, a tank, filter units and fuel system valves. As practice shows, very often malfunctions of these particular elements become the reason that the brushcutter does not start. The quality and correctness of the preparation of the fuel mixture deserves special attention, especially when it comes to two-stroke engines. With regard to this parameter, the manufacturer's recommendations should be strictly followed in order to avoid serious breakdowns and costly repairs. In the case, for example, with a piston group of an internal combustion engine, costs can be up to 70 percent of the cost of new technology.

Often, trimmer owners have to deal with situations when the specified mixture is of high quality, the carburetor is in good working order and configured, and the device still does not show signs of life when trying to start the engine. In such cases, you should check the condition of the candle. The following steps will troubleshoot the problem:

1. turn out the candle;
2. wipe and dry the part (annealing is undesirable);
3. remove fuel and dry the spark plug channel for 30–40 minutes; such actions will avoid flooding the candle at the next start-up attempt;
4. completely eliminate traces of carbon deposits using a file or sandpaper;
5. set the appropriate gap;
6. put the candle in place.

If the candle turns out to be working and the seat is completely dry, and the scythe engine does not start, then the threads should be moistened with gasoline. It is worth remembering that, regardless of the quality of the spark that is emitted, initially there will be nothing to ignite in a completely dry chamber. When faced with the fact that the spark does not come, it is worth paying attention to checking the contact between the high-voltage wiring and the spark plugs.If this connection turns out to be of good quality, then it will be necessary to check the operability of the ignition system control unit. In such cases, it is unlikely that it will be possible to do without the services of a qualified specialist.

The next step in diagnosing a gasoline streamer will be to check the condition of the filters. Often, the brushcutter does not start well or does not start at all on a cold one due to the fact that the air filter is clogged. This malfunction can be identified by excluding it from the system. If after that the braid starts up, then you will have to clean or change this element. Experienced users are strongly advised to periodically purge the air filter to maximize its useful life.

The described tool may also not start due to problems with the supply of gasoline caused by a dirty fuel filter. To quickly and effectively eliminate such a breakdown, you just need to replace the filter element with a new one. It is important to remember that the suction inlet must be equipped with a filter, which is provided by all instructions... Failure to comply with these rules and recommendations can lead to expensive piston repairs. In the process of diagnosing and searching for the source of problems with starting the mower, attention should be paid to the breather, which is responsible for stabilizing the pressure equalization in the fuel tank. In addition, it is necessary to check the cleanliness of the exhaust duct and the muffler mesh. As a rule, such problems are most often encountered when troubleshooting old models.

As practice shows, gasoline trimmers stop starting or function normally after winter, that is, long-term seasonal storage. Before further attempts to run the tool, thorough diagnostics should be performed to determine the source of the problem. At the moment, there are several of the most common causes of a malfunction.

• Initially, it is necessary to check the quality of the fuel. Saving in such cases can have extremely negative consequences. Experienced brushcutter owners and experts advise preparing a mixture, the volume of which will correspond to the upcoming work, since its surplus quickly loses its quality.
• Trimmers of such famous brands as, for example, Husgvarna, Makita, Stihl, are very sensitive to the fuel used. It is about the quality of the fuel and the octane number. Providing suitable operating conditions and extending the service life of the equipment will allow refueling with high-quality gasoline.
• At the time of starting the internal combustion engine, the petrol cutter may stall due to the fact that it floods the spark plug. Often in such situations you have to deal with the need to adjust the carburetor. It is worth noting that similar problems arise when the braid stops getting hot.
• Sometimes the tool cannot be started, although the plug is wet, which in turn indicates that the fuel mixture has entered the combustion chamber. As a rule, this is one of the symptoms that there is no spark. The reasons may be the lack of normal contact between the spark plugs and the high-voltage wire, or drying out of the threaded connection in the spark plug channel.
• If there are no problems with the spark, and at the same time the candle itself remains dry, then most often this indicates that gasoline is not being pumped. There may be several reasons for this situation. We are talking, in particular, about the condition of the fuel filter and carburetor.
• The internal combustion engine of the streamer does not start or immediately after starting it stops working, which may be due to clogging of the air filter, which prevents the normal supply of air necessary to enrich the mixture.

It is no secret that the best and most effective repair method is to prevent possible malfunctions. As already noted, one of the key points is how well the gasoline-oil mixture is prepared. Its components must be at least AI-92 gasoline and high-quality engine oil. The proportions for which the mixture is prepared are indicated in the manufacturer's manual that comes with any gasoline trimmer. As a rule, oil is added to gasoline using an ordinary medical syringe. In this way, the easiest way is to maintain the appropriate proportions.

Quite often, if problems arise with starting a brushcutter, the owners of the tool try to carry out repairs with their own hands. With the necessary knowledge and skills, this approach will significantly reduce operating costs. First of all, it is worth checking the fuel system and, in particular, the filter element. If clogging is found, the easiest way is to replace the filter with a new one. If the air filter has become the source of problems, then you can get out of a difficult situation even in the process of work with little time. You will need to do the following:

1. remove the filter element;
2. directly in the working conditions, you can wash the filter with the used gasoline;
3. when operating a scythe at home or at a summer cottage, water and simple detergents are used for cleaning;
4. after washing, the part is thoroughly rinsed and dried;
5. a completely dry filter should be lubricated with engine oil;
6. excess lubricant is removed by squeezing the filter element with your hands;
7. the cleaned part is put in place and the plastic cover is fixed with screws.

If the described actions did not provide a positive result, then the next step will be to adjust the idle speed using the appropriate carburetor screw. Many publications and videos posted on the world wide web are devoted to this topic. There are several steps you can take when trying to resolve the issues in question.

1. The trimmer is placed on the side so that the "air" is on top. This will allow the fuel mixture to flow to the bottom of the carburetor. Often, attempts to start the internal combustion engine turn out to be successful if you first dismantle the mentioned part and literally send a couple of drops of gasoline directly to the carburetor itself.
2. If, after all the described actions, the scythe did not work, then attention should be paid to the state of the candle and, in particular, the presence of a spark. In parallel, all fuel is completely removed from the combustion chamber.
3. Often, owners of petrol cutters find themselves in situations when the fuel and air filters are clean, the candles are in good order, the fuel mixture is fresh and of high quality, but the internal combustion engine does not show signs of life. In such cases, experienced specialists recommend using a universal and proven method of launching many years of practice. It is necessary to move the choke to the closed position and pull the starter handle once. After that, the damper opens and the engine is started 2-3 times. In the overwhelming majority of cases, the result is positive.

The spark plug can be flooded with fuel during the start of the trimmer ICE. Even with a high-quality mixture and a good spark, it is unlikely that it will be possible to start the device. The most effective way out is to remove the candle and dry it.In parallel, you can check this spare part for operability, if any faults are detected, replace it. This procedure includes a number of simple steps, namely:

1. turn off the device and wait for the power unit to cool completely;
2. disconnect the wire;
3. remove the candle itself;
4. inspect the dismantled part;
5. make sure there is a gap (0.6 mm);
6. screw in a new, working plug and tighten it.

In practice, many repair work related to the fact that the scythe has stopped starting up and which sooner or later one has to deal with in the process of operating a household petrol cutter, it is quite possible to cope independently. But in case of serious malfunctions, it would be most rational to contact a specialized service. However, the key factor in such cases will be the ratio of the cost of repairs to the price of a new trimmer.

The stability of the operation of any brushcutter and the absence of problems with starting the power unit of such devices directly depend on the conditions in which the tool is used and the quality of maintenance. And we are talking about the following basic rules:

• in the process of work, it is necessary to pay special attention to the cooling system and other elements; it is strongly recommended to timely and efficiently clean the channels located on the scythe body and the ribs of the starter;
• in the process of processing various elements, solvents, gasoline, kerosene and other effective means can be used;
• these works should be carried out after the power unit has completely cooled down;
• it is necessary to fully comply with all the rules specified in the relevant instructions drawn up by the developers of the described tool, which will avoid overloads in a warm engine, which in turn is the most common cause of serious damage;
• all fuel residues in the internal combustion engine should be completely drained before long breaks in the operation of the streamer; it should be borne in mind that the gasoline-oil mixture decomposes rather quickly into the so-called heavy fractions, which inevitably clog the carburetor;
• after removing the fuel, it is required to start the engine and let it run on XX until it stalls itself; in a similar way, the remaining mixture will be completely eliminated from the internal combustion engine.

Particular attention should be paid to preparing the instrument for long-term seasonal storage. This should be done to minimize the risk of problems with starting the engine. Competent preparation includes the following manipulations:

1. completely disassemble the trimmer;
2. thoroughly rinse and clean all elements to which there is access;
3. inspect the parts of the petrol brush in order to identify defects (mechanical damage found in this case should be eliminated);
4. pour engine oil into the gearbox;
5. carry out high-quality cleaning from clogging of the air filter element;
6. having the appropriate knowledge and practical skills, it is possible to carry out a partial disassembly of the power plant, followed by purging and lubrication of the moving elements;
7. wrap the assembled gasoline braid with a pre-oiled rag.

In addition to everything already listed, it is necessary to lubricate the piston group. This algorithm provides for the following simple manipulations:

1. remove the candle;
2. transfer the piston to top dead center (TDC) with the help of the starter;
3. pour a small amount of engine oil into the cylinder;
4. crank the crankshaft several times.

Regardless of the cost and brand of equipment, you should clearly follow all the requirements of the relevant instructions and adhere to the recommendations of developers and experienced specialists. Today, detailed information regarding the correct use of such a technique can be easily found on many specialized sites and forums.

Next, watch a video on how to determine and eliminate the reason why the gasoline trimmer will not start.