Tiller Engine Shoots Muffler Cause
The engine shoots at the muffler (pops) What could be the reason for the pops in the muffler? Let’s analyze both the injection engine and the old carburetor. Everything on the shelves
Ignition problems sometimes also lead to the fact that the engine shoots at the muffler. With the appearance of such a malfunction, you immediately need to check whether the ignition timing is correctly set. If it is delayed, it will not work to avoid the shots. In this case, the spark that ignites the fuel will be supplied with a delay. When the intake valve is opened. In this case, a small amount of fuel will be discharged into the manifold. It is worth noting that not only the exhaust pipe, but also the valve can burn out. But this will only happen if you ignore the claps for a long time.
If the ignition is set normally, but shots still occur, the problem lies in a weak spark. In addition, this is caused by faults in the contacts of the wires, the contact group and the toggle switch. A weak spark also occurs due to problems with the candles, so you need to make sure that they are in working order. A common problem is the inconsistency of its heat rating to a given engine.
Thermal gap problems
Usually, when popping occurs, car owners start testing the engine under various load levels. If problems occur at high and low speeds, this most likely indicates a failure in the size of the valve thermal clearance on the cylinder block. At the same time, pops will also often occur as a result of overheating of the power unit.
Camshaft pushers should always have a small gap where they contact the valve. When the engine warms up, the metal of the parts expands slightly, while the thermal gap will decrease. Properly positioned valves should fit snugly up to the seat.
In the absence of this gap, the valve will not be able to tightly close the lumen, the fuel mixture during the compression stroke will go into the exhaust manifold, in which it will ignite, resulting in sharp pops.
If the cause of the problem lies in the thermal gap, the usual adjustment of the valve position will help.
The engine fires at the muffler (pops). Why? Let’s disassemble the injector and carburetor
Shots arising in the exhaust system are a sure sign of a machine’s power unit malfunction. Most often, a similar problem occurs in the case of carburetor engines and it is associated with ignition faults or the gas distribution mechanism. But sometimes it shoots at the muffler and the injection-type power plant.
In this thread, we will analyze the malfunctions of tillers and cultivators of all brands, Salute. Neva, Bison, etc., and their removal and repair. Most of the malfunctions are characteristic of all types of tillers, their engines and other components.
Engine won’t start
– If the engine is tilted, must be placed horizontally.
– The fuel may not be supplied to the carburetor. It is necessary to disassemble and purge the fuel system with air.
– The filter may be clogged. The filter needs to be replaced or cleaned.
– The outlet in the gas cap may be clogged. Needs to be cleaned.
– Maybe it’s the candle. It is necessary to check the connection of the wires, the engine stop buttons, unscrew the spark plug and clean. Replace if necessary.
– Magneto failure possible. Replace.
Engine runs intermittently, stalls
– Engine may not yet warm up. Need to warm up
– Candle contamination possible. It is necessary to clean the candle by removing carbon deposits.
– The end of the wire does not fit snugly against the candle. Press the end of the wire firmly against the candle.
– Failure of magneto. Replace.
Why does the tiller stall under load?
A fairly common problem is that the equipment stalls after 5 minutes of work. Often the reason is a fuel supply failure and ignition problems.
If the equipment stalls during operation, you need to check how well the fuel is supplied:
- The candle is taken out and viewed. It is overdried. This indicates a lack of fuel;
- There must be enough fuel in the gas tank for the normal functioning of the machine;
- The condition of the fuel cock is examined. It can be simply blocked. Sometimes it is enough to open it for further use of the unit.
The tiller starts up and stalls if there is a problem with the ignition. First you need to check the candles. Wet items indicate breakage. It is necessary to re-adjust the ignition system of the equipment.
Reconfiguration is done as follows:
- The cover is removed, which protects the parts of the ignition system;
- The engine flywheel turns until the contacts open in the magneto;
- A special feeler gauge measures the gap from the “anvil” to the “hammer”;
- The flywheel turns until the piston is compressed. The latter must reach its peak;
- The flywheel turns again until the characteristic knock, which will indicate the operation of the freewheel;
- The flywheel turns in the other direction until the mark of this element coincides with the mark on the unit body;
- The gap from the break contact to the cam is set at 0.3 mm;
- The cam is fixed with a screw, which is located above the element, and the protective cover is installed in the equipment case.
If the above steps are performed correctly, the tiller will not stall under load. When tilted, vehicles may stall if there is not enough fuel in the gas tank. The unit must be installed straight, remove the starter rope. If the engine starts, you need to fill the fuel tank.
Why does the tiller work intermittently?
There are other issues worth considering:
- The tiller’s engine hits the return line. The reason is often poor fuel use. It will not be enough to replace the fuel. The pump and fuel supply hoses are flushed;
- The technique works in jerks. The engine does not fully warm up. The motor must be turned off, wait for it to cool completely. Then restart it and warm it up for at least ten minutes;
- The engine does not pull, therefore the motor power decreases. The filter system is checked and cleaned. The problem can be provoked by wear of the magneto ignition. In this case, the part is replaced.
Owners of both petrol and diesel vehicles may face such problems. Regardless of the specifics of the breakdown, it is necessary to urgently stop using the unit and fix the problem.
Why does the tiller start and stall?
If the equipment starts up and immediately stalls, this may indicate the following problems:
- There may be a large distance between the electrodes, problems with contacts in the electronics, the spark plug is dirty. First, the candle is cleaned. After that, the integrity of the wires is checked. The normal distance between the electrodes is set;
- The carburetor may be dirty, too little fuel is supplied. Sometimes it is necessary to change the fuel and reduce the amount of oil. The carburetor is dismantled, disassembled and thoroughly cleaned;
- If the unit does not pick up speed, this indicates a lack of fuel. Gasoline can simply spill. The defect must be eliminated or the fuel tank replaced;
- The tiller does not develop speed in the event of a transmission breakdown. This is indicated by the presence of external sound from the gearbox. The malfunction is eliminated by changing the oil with which the units are lubricated.
Why does the tiller shoot the muffler?
Often, when working with an agricultural unit, loud uncharacteristic sounds from the muffler are clearly audible. At the same time, the tiller also smokes heavily and stalls. To be able to fix a malfunction with your own hands, you need, first, to determine its essence.
Most often, a tiller shoots a silencer due to a number of the following problems:
- Excessive engine oil in the fuel mixture. In this case, you need to drain the remaining fuel, flush the fuel pump and hoses, and fill in new fuel with less oil;
- Incorrectly positioned ignition. If the mechanism works with a delay, then this leads to the appearance of atypical shots that are clearly audible in the area of the muffler. In such a situation, you should immediately set the correct gap between the electrodes of the tiller’s ignition system;
- Incomplete combustion of fuel in the engine cylinder. Repairing a tiller engine in this case means disassembling the piston group, thoroughly washing and drying the engine cylinder, and adjusting the tiller’s carburetor.
Repair of all of the above breakdowns does not require special skills and great experience. The most important thing is to act strictly in accordance with the operating instructions for the agricultural unit.
Repair: why the tiller stalls under load, shoots at the muffler, works intermittently, and more
Tiller is one of the most useful household units. Even a simple and not particularly powerful machine can significantly facilitate the care of the garden and the surrounding area. At the same time, a tiller is a technique that tends to break. Let’s look at the most common breakdowns of an agricultural unit, their causes and methods of elimination on our own.
Tiller starts and stalls. Reasons and repair
Repair of tillers in case they start up and, after a few seconds, stall, it is necessary to start with finding the main causes of this malfunction. To do this, you need to inspect:
- Candles, wires and electrodes. In most cases, the unit starts up and immediately stalls due to too large a gap between the electrodes of the ignition system, poor contact between the wires, as well as a dirty spark plug. Repair should begin with cleaning the spark plug. If this does not help, then you need to check the integrity of the wires. If this did not bring the desired result, then it will be necessary to re-set the gap between the electrodes of the ignition system;
- Carburetor for contamination and sufficient fuel supply. If you have been using low quality gasoline and have added too much engine oil to it, you will need to change the fuel and reduce the amount of oil. In addition, you need to dismantle, disassemble, and thoroughly clean the carburetor;
- The presence of gasoline in the fuel tank. If the tiller does not pick up speed, then this often indicates a lack of fuel necessary for the engine to work properly. Very often, car owners are faced with a problem in which gasoline spills through a small hole or crack in the fuel tank of the car. In this case, you need to try to repair the defect, and if this was not possible, you will need to completely replace the tiller tank.
Another less common cause of a breakdown in which the tiller does not develop revs is a gearbox malfunction, which is evidenced by a third-party sound from the gearbox side. To fix the damage, you need to change the oil that you use to lubricate the unit.
Late ignition is the reason for shots in the muffler
Late ignition of the fuel mixture in the combustion chamber can also be the reason why muffler shots. The culprit is the illiterate ignition setting. At the moment of overcoming the top dead center (TDC) on the compression stroke, a spark should appear between the contacts of the spark plug, which ignites the fuel mixture.
If the ignition is slightly delayed, then ignition occurs when the piston moves down at full stroke, performing a working stroke. The outlet valve starts to open. The fuel mixture at the moment of ignition escapes into the exhaust manifold and causes a pop.
Shoots at the muffler. Check the carburetor!
Often to figure it out right away why shoots the muffler, does not work. Contrary to the popular belief that the fault is the violation of the valve timing, there may be other reasons for this behavior of the motor. Before proceeding with the search and elimination of engine malfunctions that led to the shooting in the machine’s muffler, one should understand the nature of this phenomenon. A loud shot indicates that a combustible mixture is ignited in the exhaust system.
First of all, you should check the condition and settings of the carburetor, as well as the air filter. As practice shows, quite often the re-enriched fuel mixture, experiencing a lack of air, does not burn out in full on the compression stroke and is partially transferred to the exhaust manifold and further to the muffler. Gasoline accumulates in an enclosed space at high temperatures and ignites.
The troubleshooting algorithm is simple:
- We disassemble the air filter and change the filter element;
- Check the fuel supply adjustment on the carburetor.
Adjusting the thermal gap with pops in the muffler
As soon as the engine malfunctions begin, experienced and novice drivers try to try it out at different loads. If you hear pops in the muffler at idle, medium and high speeds, there is a high probability of poor adjustment of the thermal clearance of the cylinder head valves. The fact that it is necessary to take out inventory to adjust the valves may be indicated by the appearance of pops after the engine warms up.
When properly adjusted, the valve disc always fits very tightly to the seat. If there is no thermal gap, then the valve is not able to completely close the lumen. At the moment of the compression stroke, through a small gap, the fuel mixture partially flows into the exhaust manifold, where it ignites. Unpleasant pops are “treated” by elementary adjustment of the cylinder head valve thermal clearance.