Lawn Mower Stalls When The Air Damper Is Opened

If stalled, did not gain momentum

If the trimmer does NOT rev up and off, there may be several reasons. The most common culprit is a clogged air filter. It must be pulled out and cleaned, if necessary, replaced.

Another possible malfunction is related to the mechanics of the motor drive. This part of the trimmer must be thoroughly cleaned and the cables located inside.

You also need to make sure that the cable in the carburetor has not slept. Before using the trimmer for the first time, check this structural element to ensure that it is firmly tensioned, but not tight. Otherwise, the cable may crack, resulting in costly repairs.

If stalled after gas supply

Owners of gasoline scythes quite often mention that the lawn mower stalls when you press the gas. Typically, such a breakdown occurs due to a malfunction in the carburetor. Failure in its operation can occur due to prolonged storage, use in difficult conditions, significant overload of the engine. Vibrating movements of the device during operation will become a symptom of such a breakdown.

Lawn Mower Stalls When The Air Damper Is Opened

Sometimes the trimmer stalls when you throttle because the fuel valve is clogged. This interferes with the supply of gasoline. To fix the problem, loosen the valve enough. This will restore the normal fuel supply to the carburetor.

Another possible reason the mower stalls when gas is applied is a dirty breather (check valve). This part prevents the formation of a vacuum in the gas tank. If it is clogged, air does NOT flow, which means that fuel does NOT go to the carburetor. To fix the problem, you need to clean this element.

Trimmer stalls at idle. causes and solutions

Common situations, why a trimmer or lawn mower stalls, include its work at idle. Let’s go straight to the reasons:

  • The heating of the gearbox and the decrease in speed on the drum as a result of the fact that the gasoline solution was not prepared quite correctly. The required proportion is 1: 4;
  • Contamination of the carburetor;
  • Clogged throttle;
  • When the damper is opened (if such an experiment was carried out), the air flow makes the mixture “lean”;
  • Adjusting the carburetor;
  • Clogged air filter;

Insufficient amount of fuel, which is needed for the operation of the gasoline-powered tool, will entail a situation when at high speeds, with an increase, the trimmer works, and at idle it stalls. In a situation with a carburetor, the device will stall on cold start and “hot”. For any lawn mower user. a professional and an amateur, it is important to understand that any error of the tool can depend on the fine flowing of the part, detachment of the fastener or clogging, as well as on the global breakdown of an important part of the mechanism.

Despite all sorts of malfunctions, your device still needs such an indispensable component as lawn mower knives, without which the operation of the scythe is simply impossible.!

The petrol trimmer is a useful tool for clearing unwanted grass from adjacent areas and large lawns. The design of this technique is quite complex, therefore, if the device breaks down, there may be several reasons. The most likely causes of the breakdown are usually described in the user manual. Knowing why the trimmer stalls, you can try to fix the defect yourself. The most common malfunctions that provoke a stop of lawn mowers, and the possibility of repairing them with your own hands. in the material below.

If it stalled when opening the damper

If the equipment works properly at idle, but stalls when the air damper is opened, this reports in the penetration of air into the system through cracks in the fuel supply hose or in damaged oil seals. To fix the breakage and to adjust the operation of the tool without sucking air from the atmosphere, it is necessary to replace the damaged parts.

Another possible cause of failure is a malfunction of the carburetor dosage system. To fix this problem, it is better to contact professionals.

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If stalled after launch

If the equipment starts and stalls immediately after starting, this indicates an incorrect setting or misalignment of the device. As a result, fuel does not enter the engine evenly, resulting in significant vibration and trim shut off. To fix the breakdown, you need to reconfigure the device according to the user’s manual.

Another probable problem is a clogged valve supplying the gasoline mixture. It needs to be cleaned.

Another possible cause is a damaged fuel intake hose. Air can enter the system through cracks and holes. To solve the problem, you need to increase the engine speed in order to get rid of air bubbles that have penetrated into the device.

If it stalled when heated

The lawn mower often stalls when heated. It looks like this. the tool starts up, jerks (not smoothly) and quickly stalls. This situation occurs due to fuel boiling in the carburetor or an incorrectly selected valve, which should be NOT disk, but rotary. In the latter case, if an error is found, the part must be replaced.

Damaged ignition circuit wiring or a defective coil can cause trimmer to heat up. Broken knot will need to be replaced with a new one.

If stalled at high speeds

If the carburetor stalls at high speeds, this means that at idle and low speeds, the incoming fuel is enough for it, but not enough to work at high speeds. Then it is necessary to check the health of the following trimmer assemblies.

  • Fuel hose. This may have been compromised by cracking. In this case, a replacement part is needed. Or maybe you just need to tighten the clamps.
  • The filter mesh between the carburetor and the gasoline supply hose. it could be clogged. In this situation, it is necessary to clean the part.
  • The valve located on the gas tank cap. it could get stuck or be forgotten by debris. Cleaning is also needed.
  • Carburetor. it may be misaligned as a result of constant vibration. This is usually the case for cheap Chinese parts. To eliminate the problem, you need to configure according to the instructions. In some cases, it is enough just to loosen the tightening of the carburetor body. If the adjustment fails, a new element must be installed.
  • Additionally, the air filter should be checked. It may need to be rinsed and cleaned or replaced with a new one, as it could be forgotten by dirt and grass particles when the equipment is tilted, when the user mowed in hard-to-reach places.

Why does the trimmer stall when you press the gas?

As you can see, there are many reasons why the trimmer may stall when you press the gas. That is why it is important to monitor the condition of your assistant, check the status of all systems of the mechanism in time.

Before figuring out why any of the tools of a summer resident-gardener or a specialist working with a lawn mower (lawn mower) stalls, it is worth distinguishing between two main situations when this happens. The first is when the instrument does not start after you have just made the purchase, and the second is when it is in use. So, let’s analyze both.

  • After launch. The lawn mower stalls if the carburetor is set incorrectly or if it has been adjusted. Fuel is supplied unevenly, respectively, there are distinct vibrations.
  • When heated. The situation when the mechanism starts and works, but gradually “chokes” and stalls on the move. when gasoline boils in the carburetor, or the damper in the carburetor is NOT disk, but rotary. In such cases, it is better to replace the carburetor itself. There is a variant of air leakage. when the coil or wire is broken into the ignition.
  • At high speeds. This also occurs from a carburetor ramp or a clogged fuel tank cap. It is worth trying working with a slightly open valve. Be sure to check the fuel intake hose. it may be cracked or poorly attached to the base.
  • Is NOT gaining momentum. As the main reason why the engine is NOT picking up speed, the air filter is clogged. It is possible for the cable to fall into the carburetor, breakdown of the carburetor and the occurrence of problems with the mechanics of the motor drive.

There are times when a part of the mechanism requires mandatory replacement, so we are always happy to offer spare parts for lawn mowers. It is important to understand that sometimes saving on minor elements can lead to damage to such global components as the carburetor or engine. Therefore, competent operation and timely replacement of the necessary particles will provide you with a full-fledged work with pleasure.

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If stalled while idling

If the lawn mower stalls while idling, there could be several factors.

  • First you need to check the prepared fuel solution when it comes to four-stroke trimmers running on a gasoline-oil mixture. There is a possibility that it was made incorrectly. the proportions are not maintained. Because of this, the gearbox heats up, and the revolutions on the drum decrease.
  • Another probable prerequisite is the clogging of elements such as the throttle valve, air filter or carburetor. Need to clean Specified parts.
  • Another possible factor is misalignment or misalignment of the carburetor. You need to re-configure according to the instructions.
  • Observe this problem mono even when opening the air damper. In this situation, the lack of fuel for the trimmer is due to the air flow.

If the device lacks fuel, it works properly at high speeds or when they increase, but stalls at idle. If the root of the problem lies in the carburetor, the mower will shut off on both cold start and hot start.

If stalled while idling

If the lawn mower stalls while idling, there could be several factors.

  • First you need to check the prepared fuel solution when it comes to four-stroke trimmers running on a gasoline-oil mixture. There is a possibility that it was made incorrectly. the proportions are not maintained. Because of this, the gearbox heats up, and the revolutions on the drum decrease.
  • Another probable prerequisite is the clogging of elements such as the throttle valve, air filter or carburetor. Need to clean Specified parts.
  • Another possible factor is misalignment or misalignment of the carburetor. You need to re-configure according to the instructions.
  • Observe this problem mono even when opening the air damper. In this situation, the lack of fuel for the trimmer is due to the air flow.

If the device lacks fuel, it works properly at high speeds or when they increase, but stalls at idle. If the root of the problem lies in the carburetor, the mower will shut off on both cold start and hot 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.

When storing the equipment for the winter, conduct an audit, lubricate the gearbox and piston system, Wrap all dust in oiled rags and store in a dry place.

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.

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.

Lawn mower Will not start hot. pull the gas trigger and sharply pull the cord several times until the engine starts, then pull the trigger. Will not start. specialized repair required.

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;
  • In the absence of a 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.
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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.

Diagnostic features

A well-posed question is already half the answer. The search for a solution will be significantly accelerated by the fact. under what circumstances a gasoline trimmer or lawn mower stalls, namely:

  • Immediately after the start;
  • When it has been idling for some time. after one or several minutes;
  • When you press the gas button (or knob). or soon after starting work at high, near maximum speed;
  • Under heavy load (for example, to cut bushes, mows thick and tall weeds)
  • When warmed up in the cold. heats up excessively (the lawn mower has stalled due to overheating)
  • After opening the air damper.

Depending on which of the events is clarified during the prediagnosis by the elimination method, a more specific cause of the lawn mower or trimmer malfunction is sought.

When the air damper is opened

The mower or trimmer stalls when the shutter is raised for the following reasons:

  • Pumping excess air due to a cracked fuel suction hose;
  • Oil seals are worn out;
  • Improper functioning of the fuel and air metering unit when they are mixed.

Stop the lawn mowers in this case immediately.

During engine warming up

If the engine heats up too quickly, overheats. the lawn mower or trimmer works unevenly, like a jerk. Then it stalls. The reason may be as follows:

  • Boiling gasoline;
  • The ignition wire is damaged (poor insulation)
  • The coil in the ignition system has noticeably burned out, inter-turn short circuits have appeared.

The same heating is observed when using a rotary (rather than disc) damper.

If stalled, did not gain momentum

If the trimmer does NOT rev up and off, there may be several reasons. The most common culprit is a clogged air filter. It must be pulled out and cleaned, if necessary, replaced.

On a note! Will stall, did not gain momentum, the trimmer could be due to a carburetor malfunction. The unit for repair or replacement must be taken to the service center.

Another possible malfunction is related to the mechanics of the motor drive. This part of the trimmer must be thoroughly cleaned and the cables located inside.

You also need to make sure that the cable in the carburetor has not slept. Before using the trimmer for the first time, check this structural element to ensure that it is firmly tensioned, but not tight. Otherwise, the cable may crack, resulting in costly repairs.

Lawn mower stalls when you press the gas: causes and remedies

A lawn mower and a gasoline trimmer. machines that do not just mow the grass, but cut it up to several times more than their counterparts with an electric motor. Once the lawn mower or trimmer stalls for a while, and the mowing process immediately slows down.

Trimmer stalls. how to fix the problem

The petrol trimmer is a useful tool for clearing unwanted grass from adjacent areas and large lawns. The design of this technique is quite complex, therefore, if the device breaks down, there may be several reasons. The most likely causes of the breakdown are usually described in the user manual. Knowing why the trimmer stalls, you can try to fix the defect yourself. The most common malfunctions that provoke a stop of lawn mowers, and the possibility of repairing them with your own hands. in the material below.