Lawn mower won’t start on hot run. Maintaining the chain saw correctly

Grass trimmer does not start on hot

Grass trimmer, both electric and with an internal combustion engine (ICE), is an indispensable tool in the summer and fall for owners of summer houses and private homes.

Easily removes weeds, small bushes and tidies up the lawn. But, like any technique, grass trimmers fail at the most inopportune moment.

To troubleshoot with your own hands, the user of this equipment first needs to determine the cause.

The first thing is the spark plug

Replacing the spark plug did not help? Then you need to look at the magneto, the cable, the ignition coil. The cable is tested, the coil is checked for resistance (multimeter to the resistance measurement mode at 200 ohms, one contact to the earth, the other to the output of the coil, it should show 0.4 to 2 ohms).

Sometimes the magnets on the flywheel get dirty, or the key slips, and the ignition torque flies away. The Chinese crap throws up different surprises, but for the most part all can be detected visually.

You have to pay attention to the spark plug deposits. If it is black, the candle is burnt, it means that the mixture is rich, or you have mixed the fuel incorrectly. If the deposit is white, it means the mix is poor, and the engine could die of temperature already. Ideally the color should be brick-colored, light, without much buildup.

Again, if the plug is black and dead, you should not immediately blame the carburetor and ignition. Screw in a new one, see what kind of residue there is. Maybe it’s just a bad spark plug.

No chain saw does not start when hot

There are no superfluous phrases in the instruction manual, all that is offered is aimed at trouble-free operation of the lawnmower. Cleaning all parts after each work cycle makes it easy to remove uncured residue and dirt. Clean only when parts have cooled. This technique contributes to the quality of air cooling of the engine and gearbox.

To refuel, use fuel with the oil recommended in the instruction manual. If you leave the fuel mix in the fuel tank, the oil will float up and settle on the slide when you start, making it harder to regulate. Mixture can sludge and clog carburetor fuel supply.

When storing your saw for the winter, check the gearbox and piston system, lubricate the whole saw and store it in a dry place with oily rags.

It is not permissible, dangerous for the tool and health of the mower, to use a metal cord instead of a fishing line. It cuts more efficiently, but it puts more strain on the gearbox and engine. Worn-off piece of wire flies at speed of a bullet when torn off. Effective mowing may cause rapid wear of engine piston group. For a better mowing efficiency a sprocket shape fishing line should be used.

Do not use a metal cord instead of a fishing line. it is dangerous for the tool and the hedgehog’s health. The cutting is more efficient, but it puts more strain on the gearbox and engine. Worn off piece of wire, when torn off, flies with the speed of a bullet. Why on hot bad If the motor does not start well on Why the grass trimmer does not start.

Gasoline trimmer does not start when hot Causes

With lawn mowers and electric grass trimmers, if we do not consider breakdowns related to the boom and mowing head, faults mainly occur in the area of the engine. Typical breakdowns of the gasoline trimmer for grass, which the owners of this unit face most often, are as follows:

  • engine breakdown;
  • Problems with carburetor;
  • Problems with the fuel supply;
  • muffler failure;
  • Gearbox failure;
  • broke the starter;
  • problems with the air filter;
  • the breather pipe on the fuel tank is clogged.
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As the structure of an electric mower is much simpler than a power trimmer, there are few reasons for its failure.

It should be noted that it is better to entrust the elimination of some of them to a specialist.

In general, the grass trimmer stops working normally in the following cases:

  • electrical cable malfunction;. control button malfunction
  • faulty control button;
  • burnt-out winding of the motor stator;
  • broken contact connections on the motor.

The reasons why the gasoline grass trimmer has stopped starting may be different, so you need to conduct a step-by-step diagnosis of the machine.

Remember, always check the presence and quality of fuel before starting the machine. In this case, do not be greedy and save, as well as “smart” about the amount of added oil. You need to do everything according to the manual attached to the unit, because if the piston group fails, its replacement will cost about 70% of the total cost of the grass trimmer.

Use only as much fuel as you can use during the work. The gasoline left in the tank after some time loses its properties and can harm the engine. So don’t prepare the mixture for a long time and in large quantities. If the lawnmower does not start well, try to drain the “old” fuel from the tank, and fill it with a freshly prepared mixture.

Important! Filling the machine with fuel, the origin of which is unknown, is fraught with negative consequences. Gasoline must be of good quality, bought at a gas station and its brand must not be lower than АI-95.

So, you have changed the fuel, but nothing has changed, and the grass trimmer still does not start. In such a case you should check the spark plug channel: whether it is not covered with fuel mixture.

Often users put the choke in the “OFF” position when starting the engine and when the engine starts, they do not put it in the “ON” position, and then the engine stalls.

Next, the attempt to start the engine again leads to the fact that the gasoline floods the spark plug, and the start becomes impossible. To diagnose and eliminate a possible problem in this node, do the following.

  • You need to unscrew the spark plug, wipe it well and dry it. When installing the plug in the cylinder of the internal combustion engine, it must be dry.
  • Drain accumulated fuel from the combustion chamber. do this through the hole where you unscrewed the spark plug.
  • If there is soot on the electrodes, remove it with a fine file or nail file.
  • Do not forget to adjust the clearance between the electrodes before reassembling the part. The gap on the spark plug should be 1mm. Use a coin as a feeler gauge to check the gap.
  • Next, reassemble the block, read the starting instructions and try starting the engine again.

If the ICE does not start, you will need to check the spark. To do this:

  • unscrew the spark plug;
  • put the cap on the high-voltage wire;
  • touch the metal part of it to the cylinder housing (to ensure contact, you can insert a pipe wrench) as shown in the figure below;
  • pull the start cord so that several revolutions of the engine occur.

The spark should normally happen between the electrodes every time the piston is turned. If there is a spark, then the cause of the fact that the ICE does not start, you need to look in other nodes of the apparatus.

For a better understanding of how to test the spark plug, you can use this video, where the test is shown on the example of the lawnmower “Union”.

If there is no spark, first check the cable that connects the spark plug to the coil. it may be the cause. You can test it with a tester. If an open circuit is detected, the ignition cable must be replaced.

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Also, if the spark is lost, the ignition coil (magneto) may be defective. The illustration below shows what the ignition coil (magneto) from a Patriot gasoline grass trimmer looks like.

To rule out a malfunction, you will need to use a tester to check the magneto of the grass trimmer, namely, its primary and secondary winding. The primary winding resistance should be between 0.4 and 2.0 ohms.

If it reads zero, then the coil is shorted and if it is infinite, then it is a clear sign of an open circuit. Resistance on the secondary winding should be somewhere between 6 and 8 ohms.

On some coils, it may be as high as 15kΩ.

Air Filter

If your lawnmower does not start or immediately stops after starting, pay attention to the air filter because it may be blocked and this prevents air from entering the combustion chamber and igniting the fuel.

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To see if it is the filter, remove it and try starting the engine. If it works, you’ve found the problem. Filter must be replaced or rinsed well and dried before installation.

In case you find oil in the air filter, it should be rinsed with gasoline, squeezed well and dried for at least 2 hours before putting it back in place.

If the machine still fails to start when the air filter is removed, it is advisable to check the fuel filter.

Fuel filter

This filter cleans the fuel from any impurities. If it is clogged, no gasoline enters the cylinder and therefore the machine does not run or shuts down after starting. The fuel filter is at the end of the intake hose, which is inside the fuel tank. To get to the filter, you must remove the plug with the tubes coming out of it.

Tools needed:

If the brushcutter engine refuses to start, check the spark plug. If it is completely dry, it means that there is no fuel in the combustion chamber and the reason is the carburetor. It is also worth checking the spark plug immediately to rule out the cause on all fronts.

You can also make sure that the motor itself is in good working order. To do this, unscrewing the candle, you need to pour a syringe into the combustion chamber a few milliliters of gasoline. After that, the plug is screwed and the lawnmower starts. If there is nothing wrong with the motor, it will start for a few seconds. This will once again confirm that it makes sense to disassemble the carburetor.

Then the plastic protective cap is removed along with the air filter. After that use a Phillips screwdriver to unscrew the 2 screws that hold the air damper and carburetor on the engine. Immediately the fuel pipes come off.

On the side of the choke cap, unscrew 4 screws with a screwdriver and divide it into 2 halves. We’re interested in the half with the choke. On its inside, there is a valve in the center.

It often gets stuck because after the evaporation of gasoline at idle time it remains viscous oil that works like glue. To check it, you need to put a short thin tube and try to blow air through it. If it is stuck, it will not be able to blow in any direction.

The jammed valve can be fixed with a usual match. Do not use a toothpick, because it is sharp and can cause damage. Use a match to lightly press into the valve and loosen it. It will blow out after cleaning with a match.

The fuel will be able to flow, so it will start. Cleaning the valve is not the answer for all brushcutters that still won’t start, but it helps in about 8 out of 10 cases. The other 20% are usually carburetor related, too, usually with the needle.

Troubleshooting by professionals

The first thing a user may notice is a deterioration in the unit’s performance. The grass is not mowed evenly enough, there are gaps in the lawn. This happens because the motor starts to malfunction, its power decreases. Top 5 symptoms that indicate a malfunction:

  • Increased vibration of the device.
  • Excessive noise in operation.
  • Lawnmower starts and stops.
  • The appliance shuts down on its own.
  • The machine whistles.
lawn, mower, start, maintaining, chain, correctly

The main 3 reasons why the lawnmower stalls. improper operation, overload, prolonged operation (engine overheating). The system is cooled, thanks to the air filter, it should be checked every time you use the garden-technique. What to do so that the lawnmower does not stall. before turning on the device, check the presence of gasoline in the tank, whether there is oil. It is recommended to clean the filter after each mowing.

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The service station is not only at the car, but also at the garden-technique. Usually the service center is addressed when the piston and carburetor of the device is malfunctioning. Why and from what does not start the gasoline lawnmower in these cases are determined by masters:

  • Damage to the integrity of the device or individual parts. using a pressure gauge, find the affected area, seal it.
  • Clogging of channels, jickers. the elements are blown with air, cleaning fluids are used.
  • Worn pistons, gasket. make a replacement part assembly.

Does not start in the cold trimmer for grass. remove the cause

in the cold.The cause is air leakage, which prevents fuel from pumping. In the chamber.

After a few jerks, it will start and then stall, which is normal. What to do when the fuel was definitely normal, the spark is there, but the gasoline grass trimmer does not start? After moving the flap in the operating position, start the tool again and start working.

The spark plug pours out on the lawnmower What to do Video

The owner of the cottage will not do without a lawn mower or trimmer for grass. However, during its operation of course appear situations where the unit for some reason ceases to start. And the circumstances of this you will like a lot. Let’s find out why the gasoline grass trimmer does not start.

To find why the gasoline trimmer for grass does not start or gaily stalls, you need to check the work of all the major components of the unit. In particular, it is principled to do it after a long period of storage of lawnmower. What is needed, the main prerequisites for this behavior of the grass trimmer is as follows:

Do not start on a cool trimmer for grass. eliminate the cause

Use for cleaning the carburetor and a special washer.

  • If the carburetor gaskets are worn out, it is necessary to change them. And if the tightness of this device is broken, you will have to find a faulty part of the carburetor and replace it.
  • Grass trimmer may not start due to wear of the piston group. But it’s better to change such parts of the lawnmower at an auto service center. line for trimmer for grass. which one to choose?

Immediately after buying a trimmer for grass for grass, we are faced with a lot of questions. how to correctly use it, how to charge (if it’s a gasoline tool) and understandably, what line for a trimmer better select. The answer to the last question you will find in the text of the article.

How to quickly remove a stump without uprooting?

Some gardeners at some point are faced with the need to cut down trees growing in this area. Stumps are left behind, and if the trees are of significant size, uprooting them is very problematic. Other methods of getting rid of stumps are described in the article.

lawn, mower, start, maintaining, chain, correctly

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