For what reason does not start the grass trimmer

Lawn mowers won’t start or they will start but then stop. What Causes?

You need to know how the complete machine works to get to the bottom of this. It also happens that a newly purchased, new saw does not start, and begins running to service centers, in such cases, it is recommended:

carefully read the instruction manual; study in detail the way of the first start-up and running-in mower; try to understand the principle of operation of the product, how gasoline is pumped and so on.

Gasoline quality is bad; wrong proportions of gasoline and oil; fine filter is clogged; spark is gone.

Lawn mower won’t start after winter

In such cases it is necessary to carry out maintenance of the device. Take off the fuel system, including filters (air, fuel), disassemble the carburetor, clean and rinse every node. Blow out the filters with air. Pay attention to fuel quality and octane number.

it is necessary to take into account that products of such famous brands as STIHL, Husgvarna and others, will not work on gasoline with a low octane rating. The fuel suitable for them is AI 92 or higher, from gas stations and then from well-proven ones, because gas stations sometimes have bad gasoline, too. The use of high octane and high quality gasoline will determine how long you will use your lawnmower and how long it will last.

Another thing to consider is that if you store the diluted fuel mixture for a long time, it deteriorates, which also leads to the consequences, when the lawnmower won’t start. Therefore, dilute should be portioned, that is, the amount of mixture that is produced at one time. The mix ratio for mixing gasoline and oil is clearly described and explained in the owner’s manual. Strict adherence to the correct proportions will at least relieve you from several questions, why the lawnmower does not start and what to do in such cases.

lawnmower starts and stops. What to do?

a spark is there and everything seems normal but the lawnmower won’t start in such cases you should check the air inlet valve in the fuel tank. A clogged valve creates a vacuum in the tank, in which the carburetor does not receive enough gasoline, so the lawnmower will start, but then stalls. To rule out this cause you need to clean the valve and try to start the lawnmower with the tank cap not completely screwed on. 2. If the lawnmower does not start, you should remove and clean the fuel filter, as well as check all the carburetor parts, and then try to start. The lawn mower won’t start again, disconnect the air filter, try to start without it, if the lawn mower works, the problem is in the air filter, replace it.

lawnmower won’t start, spark is gone

The spark is missing, check the contacts and the correctness of the gap between them, the wire to the spark plug and the spark plug itself. A way to check the spark plug, unscrew the plug, connect a wire to it, put the plug sideways to the hood of the engine and pull the starter a few times, as if winding up the lawnmower, with a need to look at the angle and the plug contact, between them should run a spark. If there is no spark, take a new spark plug and do the same procedure, if even so the spark is not traced, then the problem is in the wire or contacts, it is better to replace them.

lawnmower won’t start when cold

When starting a cold engine, it is not advisable to press on the gas. Tilt the mower so that the air filter is on top, press the suction button 5-6 times, set the function switch lever to the “start” position, pull the starter cord several times until the engine starts. After several seconds of engine work, turn off start system.

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The lawnmower does not start while hot

If the lawnmower has recently been in operation and has not yet had time to cool down, but does not want to start. press the throttle trigger, pull sharply the starter cord several times until the engine starts and only then release the throttle trigger. If enough time has passed and the lawnmower has had time to cool down, then you have to start it like when it was cold. If the above methods didn’t help and the lawnmower wouldn’t start, then it’s time to call the service.

Repair and service of gardening equipment.

Specialized service center “Agrotehservice. Warranty and post-warranty service of world manufacturers of machinery! Attention! For users!

Lawn mower or grass trimmer won’t start: causes and treatment

ProfiDom start troubleshooting on our recommendations and with a high degree of probability you will be able to start the engine benzotrimmer.

Where to start troubleshooting, when the lawnmower does not start, what nodes should be checked?

To start gasoline trimmers use manual starters. These starters are used to manually move the crankshaft. It is important to turn on the ignition, so that when the crankshaft rotates, the fuel-air mixture entering the cylinder can ignite. The ignition of the first portion of the mixture will cause the engine to start, and at this point, the grass trimmer is ready for operation.

However, very often it happens that the attempts to start the engine are frustrated. Naturally, when after 5 attempts to start the engine, you can not achieve success, then you need to proceed to the diagnostic measures. There is a special sequence, which should be followed to find the reason why the lawnmower does not start, and successfully eliminate it.

The second one is the carburetor

Do not disassemble the assembly at once, especially if the engine stalls after starting or does not hold idle. First try to change the fuel, maybe there is too much oil in it. You can squirt some air cleaner into the air filter, give the engine a little “break” at full throttle.

Then go in order. air filter, fuel filter (it may be outside and in the tank), fuel priming button, hose integrity. Corked gas tank. may be a clogged vent valve, the motor simply does not pump gasoline. Blow it out and it should work!

Be sure to look at the carburetor connection to the intake manifold! If it is sucking air and leaks. fix it!

Dispensing needle gets stuck. also problem with some models. It’s enough to push it down or remove it and sand it with velvet.

You can remove the hose from the carburetor, to see if the fuel goes to it on pumping. It is clear that often to check it you have to take off the plastic cover and break your fingers on the latches, but anyway sooner or later you will have to get there.

If, for example, the manual grass trimmer Patriot does not start, stops at high revolutions or immediately after starting, you should check the main units and assemblies of the lawnmower. The sequence of diagnostics should be as follows:

  • The fuel tank (the quality of the fuel plays a major role).
  • Candle and spark plug passage.
  • Air filter.
  • Fuel filter.
  • The breather.
  • Exhaust valve.

Pay attention! In most cases, the irregularities are caused by the above-mentioned components.

Checking the fuel system

Before starting up, not only should you check the availability, but also the quality of the fuel. When it comes to the choice of fuel be careful, it must be of the right quality. Excessive economy can lead to the replacement of expensive pistons. The oil-fuel mixture should be prepared according to the supplied instructions.

Diagnosis of the ignition system (ignition coil and flywheel clearance of the brushcutter)

Kommunar grass trimmer repair is necessary if it does not start when hot or cold and throttles. It is quite possible that for repair it will be enough to make adjustment of ignition, otherwise the timely ignition of fuel in the engine combustion chamber will not be carried out. This failure can damage the starter assembly or cut the starter cord.

Note! The ignition adjustment is usually limited to setting the correct gap between the flywheel and the magneto (coil).

  • Remove the cover from the motor, this is done in different ways on different models.
  • It is necessary not to unscrew all the 2 bolts that hold the magneto.
  • The flywheel should be turned so that it is at the top.
  • Next, a calendar or business card should be used to correctly set the gap. This thickness is sufficient to obtain the required clearance.
  • The magnetic field will soon attract the coil to the flywheel. Screw in the bolts by holding the coil with your fingers.
  • Remove paper. The grass trimmer can be attempted to start.
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Checking the spark plug duct and the spark plug

When the lawnmower does not start, flooding the spark plug, it is not very difficult to determine the cause. often the spark can disappear after the winter. To repair it, you will need to use a spark plug wrench and a spare spark plug (available from any motorist). Troubleshooting a brushcutter and fixing them with your own hands is no big deal.

  • The spark plug must be removed and wiped clean.
  • Excess fuel must be drained out through the spark plug hole, dried with the spark plug.
  • The old spark plug should be cleaned of dirt with a file or nail file.
  • Adjust the gap at 1mm intervals.
  • Everything is back in place, you can try to start the Patriot.
reason, does, start, grass, trimmer

There are also more complex causes of failure:

Thanks to the above information should not be difficult with how to start the brushcutter and repair it with their own hands. When you identify malfunctions should not be delayed with the repair of gasoline trimmer for grass, it can lead to more serious violations in the work of important segments.

How not to get confused, if the lawnmower does not start

The tool, despite its small size, is a complex technical device. If you study the user manual, it turns out that the reasons why the mower does not start are known and can be eliminated. It is necessary to consistently eliminate the factors that make it difficult to start the tool. Usually start with the more accessible nodes with an easy check of serviceability.

Lawn mower doesn’t start when it’s hot

Before looking into why any of the tools of a dacha gardener or professional working with a brushcutter (gasoline mower) stalls. it’s worth distinguishing between two basic situations when this happens. The first is when the tool does not start after you have just made the purchase, and the second. while in operation. Let’s break down the two situations.

  • After starting. Mower stops if the carburetor is not set correctly or if it razgulirovanie. The fuel does not flow evenly and, consequently, there is a distinct vibration.
  • At high revs. The situation when the mechanism starts and works, but gradually crushes and stops on the run. when gasoline boils in the carburetor, or the flap in the carburetor is not a disc, but a rotary type. In such cases, it is better to replace the carburettor itself. It is possible that the air drain is caused by a pierced ignition coil or wire.
  • At high revs. This also occurs from carburetor malfunction or clogging of the cap on the gas tank. Try operating with the valve a little bit ajar. Be sure to check the fuel intake hose. it may be cracked or badly attached to the base.
  • Not picking up speed. The main reason why the engine does not pick up revolutions is the air filter is clogged. It is possible that the cable in the carburetor could fall off, the carburetor could break and there could be problems with the mechanics of the motor drive.

There are times when a part of the mechanism needs to be replaced, so we are always happy to offer lawn mower parts. It’s important to understand that sometimes saving money on minor elements can lead to the failure of such global components as the carburetor or engine. That’s why proper operation and timely replacement of the right parts will ensure that you get full enjoyment from your work.

trimmer for grass gasoline Champion T334 not start, wet spark plug.

Every homeowner, dacha owner or gardener is familiar with weeds and unevenly growing grass on their property. In the past you had to use a scythe or sickle to cut the grass, which was physically demanding. Fortunately, that is a thing of the past. Now for grass mowing, use a gasoline grass trimmer, one of the most common garden tools. Gasoline grass trimmer is manual autonomous motorized garden equipment, designed for mowing grass vegetation. trimmer for grass consists of a gasoline engine, attached to the boom on one side, which is regulated by the control system, located on the U-shaped handle close to the engine. On the other side of the boom is cutting equipment (line, knife or disk) with a protective cover. Movement of the cutting equipment is due to the work of the engine through the drive mechanisms located in the boom. The grass trimmer’s suspension system consists of a shoulder strap or cross-body strap on the operator’s torso. All gasoline grass trimmers are very similar, especially the Chinese. Chinese trimmers are mainly distinguished by protective covers on the engine. Many models come with the same engines and carburetors. Like any technique gasoline grass trimmer can fail. Causes can be different, ranging from poor-quality fuel, long-term storage or failed spark plugs, and ending with overheating, especially when working with a closed flap.

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Let’s consider one of the most frequent breakages of gasoline trimmers does not start especially after long storage on the example of Champion T334.

The model name is on the back of the grass trimmer.

First of all, let’s make a diagnosis. To do this, remove the spark plug cap.

The spark plug is wet. This indicates an excessive flow of fuel mixture from the carburetor. The cause of the needle sticking in the carburetor as a result of contamination. Contamination is the result of petrol evaporation and deposition of impurities.

Then we check the spark on the spark plug. We put the spark plug in the cap of the spark plug and put the plug to the body. Press the start button on the grass trimmer handle. Pull the starter grip a couple of times. There is a spark. Dry the spark plug, clean it or replace it with a new one.

Now it is necessary to remove the rest of the fuel mixture from the combustion chamber. Pull the start handle 5-6 times. Through the spark plug hole we can see the fuel mixture vapors coming out. Then we check the compression of the engine. Clamp the spark plug hole with your finger and pull the starter grip several times. Feel the resistance and hear air coming out. So the compression is normal.

Now we proceed to the disassembly of the grass trimmer. We unscrew the fastening screw of the plastic shroud of the carburetor and remove the shroud itself.

The air filter is wet from the fuel mixture and, accordingly, the protective cover, too. We wash the filter and cover in clean gasoline.

reason, does, start, grass, trimmer

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Lift the plastic throttle plate up by pushing the plastic lever on the right side down with your finger or simply lift the plate up.

Unscrew the two screws fixing the carburetor and the plastic housing with the choke to the engine.

Flush everything from the remaining fuel mixture with clean gasoline.

We see that the rubber sealing plug is cracked. A fuel mixture will leak through the cracks in the plug (gasoline and oil diluted in it), and during operation, dust will settle on the grass trimmer components and get dirty. Replacement cork. Removing the fuel hoses from the carburetor.

Top Reasons Lawn Mower Not Starting — Lawn Mower Troubleshooting

We turn the carburetor, unscrew the four screws and carefully disconnect the carburetor.

dismantle the removed carburettor part into three more parts and wash it with the screws in clean petrol.

Blow out the mesh (1), blow out the valves (2 and 3). In the valve (3) there is a rubber band, which gets stuck if you keep it for a long time and impurities get deposited. We carefully move it with a toothpick with a broken off tip.

After keeping this part of the carburetor in gasoline for 10-15 minutes the diaphragm is easily removed even without using a box cutter.

After removing the diaphragm we see the fuel needle (1) that is set in the plate. Under the plate there is a spring (2). We unscrew the screw.

There will be a slight displacement of the plate.

Carefully remove everything and rinse in clean gasoline. Needle tip has a rubber tip, make sure the rubber layer is not torn.

Reassembling the carburetor in reverse order. It is impossible to mix up the nodes, t. к. There are ledges and grooves on them. There’s no other way to assemble it.

Attach fuel hoses to carburetor.

Screw the plastic cover with the choke and the carburetor itself with two screws, install the air filter.

Reinstall the plastic cover and tighten the screw. Start the weed trimmer. Everything runs steadily.

Everything is intact, clean, and working?

Trying to adjust. Take a long screwdriver, find idle speed regulation bolt (it is on the throttle), tighten it a couple of turns to open the throttle. Start. It runs smoothly? Then we move on. Doesn’t start or stalls? Opens the choke a little bit until the engine starts steadily.

Then adjust mixture quality with L screw. Reach maximum rpm at idle. Here the principle is reversed. the more a bolt is unscrewed, the richer is the mixture. After that the mixture quality at maximal speed is adjusted with the screw H.

If adjustment of carburetor didn’t yield results, it must be disassembled. Inspect diaphragm, clean nozzles and internal passages. It is necessary not only to have a repair kit, but also, preferably, a spare carburetor.

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