How to make a starter motor on a trimmer

How to assemble the right starter on the trimmer for the grass

If the grass trimmer engine does not start or stops right after start, if the gearbox overheats, or if unusual noise and vibration are clearly felt during the operation of the device it is important to perform a visual inspection and identify a non-working unit

To optimize preparations, a simple diagnosis and step-by-step check should be performed before the repair:

  • presence of fuel in the tank and grease in the main units;
  • if the spark plug is working properly and if it is working properly;
  • Cleanliness of the fuel and air filter of the brushcutter;
  • the clogging of the exhaust channel and breather of the device;
  • the quality of the fuel and lubricants used.

To determine the functional efficiency of the lawn mower ignition, you should determine whether the spark plug works by testing the appearance of a spark when it comes into contact with the body of the functional device.

The spark plug itself can be replaced by a new one, pre-drying the spark plug duct, if necessary, the old element is also dried, cleaned with special devices and returned to its place.

Repair of the starter gasoline drill, lawnmower, grass trimmer with their own hands

No matter how good your petrol tool is, anything can happen to it during construction, and at the worst possible moment. It’s not uncommon for problems to be caused by a broken starter. It happens, going to drill gasoline holes to install fence posts or mow grass with a trimmer, you start to run the unit, and only have time to pull the starter handle a couple of times, as the rope breaks, and the engine has already started, dashingly winding the remnants of the cord on the flywheel, tears the sheave, the spring breaks. run to the store new buy. But these, of course, are extremes.

Today we will consider the most common case, when the breakage is not so serious, and will show how to repair the starter with your own hands, if the cord broke without any devastating consequences or does not unwind because the spring inside just came off, got out of the grip. At least, initially I want to believe it. But in order to find out if this is true or not, you need to disassemble the starter.

Spring mechanism

Manual design is simple, but it can be improved to save time and effort. For example, to put an electric starter for a power tiller. Then you do not have to pull the handle every time. But keep in mind: this design will not work with all manual starters. And the wiring diagram you choose to install may not be suitable for every engine.

In these cases, it is worth paying attention to the third option: the spring mechanism for starting the engine. Once it is installed on the engine, you just need to move the handle of the motoblock, and it will immediately start. This type of kickstarter is based on semi-automatic spring operation. It accelerates the engine mounted on a single-axle tractor without having to pull the handle with your hands. To change a fully manual starter to a mechanical one, it may take about two hours of time.

The worst case

There are times when the starter still works, but, for example, a worn cord can break. The compression has not yet worked when the engine is started and the rest of the cord is immediately reeled in, the return spring loses its hooks, the grooves in the starter housing breaks. The result is the replacement of both the springs and the housing.

Заводим триммер, бензокосу без стартера START THE TRIMMER ENGINE WITHOUT A STARTER

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If the hedge trimmer or grass trimmer model has long been discontinued, it is difficult to find exactly the same parts, and the starter will completely change.

Removing and disassembling the starter, replacing broken parts

To repair the grass trimmer starter, you will need to disassemble it first, and then reassemble it. This process is not particularly difficult. You will need a screwdriver with a tip of the right shape for the work.

Everything should be done carefully, observing safety precautions, mainly to ensure that the spring, if it accidentally goes out, does not injure the master.

Disassembly of the starter assembly

Disassemble the starter mechanism to install new parts to replace the broken parts in the following sequence:

  • Unscrew with a screwdriver the screw that fixes the pulley with the starter cover;
  • take out the spring and tendrils;
  • carefully remove the pulley (you need to turn the head or work, wearing goggles and gloves);
  • Determine why the start mechanism is broken;
  • If the spring is almost completely destroyed, then it is replaced;
  • when the spring is out of the hitch, it is put back in its original place, tucking the tendons before doing so (the photos show the stacking process);

To change the spring, work carefully and carefully: it can, under the influence of the force caused by putting it in place, accidentally burst. Even if you carefully remove the roller, the springy strip very quickly flies off the coil and can hurt your hand with its sharp edges.

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It is not always possible to put the spring plate back in its place immediately. It often slips, so attempts need to be repeated until the desired result is achieved.

Assembling the starter

Assembly of the starter unit is carried out in a series of stages:

When you do the above manipulation, you must always put two washers. If this is not done, the spring will eventually damage the plastic cup, and when it is tightened, it will begin to cinch. Because of this there is a feeling as if the spring has come off. To eliminate this defect, you need to install this part of a longer length or an additional washer.

When such spares are not available, you can just unscrew the screw a little, and the starter unit will begin to work without any cinching. But this option is temporary. it is better to repair as soon as possible.

Spring tension

After the spring has been installed, tighten it. To do this, carry out the following actions:

  • Remove the handle from the starter cord;
  • then the rope is inserted into the spool slot;
  • tension the spring by turning the spool in the opposite direction to the clockwise (winding) direction;
  • make the desired number of revolutions specified in the instruction manual for the used model of grass trimmer and corresponding to the length of the cord used;
  • at the very end of the rope is passed through the hole designed for this purpose, located in the cover of the starter;
  • put the handle in place by fixing it with a knot.

If after repairing the spring continues to fly off, then you can get rid of it in the following ways

  • squeeze a suitable size piece of plate into the groove at the location of the spring hook;
  • drill holes on both sides of the groove in the spool, into which the spring catch is inserted and secure it with a wire.

Replacing a torn cord

A broken rope is replaced in the following sequence:

  • the old cord is removed;
  • choose a suitable size of rope (thickness and length);
  • By putting it through a special hole, located in the coil, tie a knot;
  • wind up the spring, making the required number of revolutions;
  • fix the handle.

It is better to perform tensioning of the spring plate with a partner, so that the edge of the cord will not be coiled inside the starter mechanism.

Assemble the starter on the trimmer and wind the spring is not difficult, but you must do it carefully and with care. For different models of benzocosmachines, the breakdowns of starting mechanisms are the same, so they are repaired in the same way. In this case there are some nuances associated with their design features.

One of the key components of the lawnmower is the starter, designed to simplify the start of the engine of the device. Like other parts, it occasionally breaks. In this case, there are two solutions to the problem: the repair of the grass trimmer starter or its complete replacement. The second option is simpler, but more expensive. In addition, the required part must first be found on sale, since different models of gasoline mowers use different starters. If you have free time and a screwdriver with a suitable tip, you can restore the functionality of this unit on your own, if you know how it works, what malfunctions are typical for it, and how to properly eliminate them. About all this. in this material.

Analysis of the starter assembly

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The starter mechanism is dismantled to install new parts to replace the broken parts in the following order:

  • unscrew the screw securing the pulley with the starter cover with a screwdriver;
  • Remove the spring and the tendrils;
  • Remove pulley carefully (turn head or work while wearing goggles and gloves earlier);
  • Determine why the trigger mechanism has failed;
  • if the spring is completely destroyed, it is replaced;
  • in accordance with the readiness of the spring from the hook it is installed in its original place, bending the antenna in front of it (the photo shows the installation process);
  • If a spring plate is installed in the groove, carefully rotate it.

To change the spring, the work should be done carefully and carefully: it can accidentally explode under the force caused by its actuation. If the pulley is carefully removed, the spring belt comes off the coil in a short time and can hurt your hand with its sharp edges.

Put the spring plate in its place immediately, it rarely comes out. This is often slippery, so samples must be repeated until the desired result is achieved.

Replacing a torn cord

A broken rope is replaced in the following order:

  • the old cord is removed;
  • choose a rope of the right size (thickness and length);
  • By attaching it through a special hole in the coil, they tie a knot;
  • inflate the spring, making the necessary number of revolutions;
  • fasten the handle
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It’s best to tighten the spring plate with your Rartpeg so the edge of the cord doesn’t twist inside the actuator.

Collect the starter on the grass trimmer and wind the spring is not difficult, just do it carefully and gently. For different models of gasoline brushes, starter breakdowns are similar in that they are repaired in the same way

In this case, there are some aspects related to their design features.

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How to repair the starter on the trimmer

Repairing the starter of a gasoline trimmer for grass can be necessary at the most inopportune moment. In this case, you can solve the problem in two ways: replace the broken part or replace the entire unit. The latter option will cost more.

To repair the device with your own hands in most cases you will need only a screwdriver with an appropriate tip. Repair work will not take much time and does not require special knowledge.

It is enough to know the device, the principle of operation, the nuances of assembly-disassembly of the starter on the trimmer to achieve the desired positive result.

Design and principle of operation of the starter on the trimmer

The petrol engine is basically the starting point of the brushcutter Its power is in the 0,5 to 2,5 l range.с. Its power is transferred to the shaft inside the hollow shaft, and then to the line or blade (operating unit) through a gearbox of gears.

Also the lawnmower has the following elements:

  • the hood of the trimmer;
  • crank handle;
  • Belt, designed for the convenience of using the device;
  • Starter, which serves to start the gasoline internal combustion engine.

All parts of the brushcutter are shown in the photo below.

The starter on the trimmer is an integral part that performs the starting of the engine to work. It is shown separately in the two photos below.

Starter gears of different models of chain saws work on a similar principle: during the start of the engine, the tabs, marked in the photo above with the number 1, engage in a catch with the pawls 3. When the engine starts, they return to their previous position because of the centrifugal force. A similar role is also performed by the wires 2.

The process of returning to the initial position of the mechanism elements occurs due to the presence of a spring wound around the axis. It turns then when the rope is pulled. After the cord is released, it retracts and winds up due to coiling of the spring. When starting the engine of the lawnmower, the starter mechanism turns its shaft until it starts working (starts).

Nowadays petrol brushcutters are equipped with two types of starter mechanisms:

The first option is much more common.

The starter on the trimmer can operate without failure for a long time. No definitive indication as to how long the engine will run without failure. Everything depends on the initial quality of the device and the observance of the rules for handling it.

The main malfunctions of the grass trimmer starter

It is not difficult to determine the cause of failure of the starter. There are several basic options:

These parts are shown in the picture below.

It may be that the starter mechanism is accidentally broken. The consequences will be dire if the torn cord gets wrapped around the flywheel of a running engine: then the spring will burst and the pulley will tear.

But such cases, when you need a complete replacement of the starter unit, occur very rarely. In most cases, to fix the mechanism, it is enough to put a new spring or replace the cord.

Remove and disassemble the starter, replace the broken parts

To make a grass trimmer starter repair, you will need to first disassemble it, and then assemble. This process is not particularly difficult. To work you will need a screwdriver with a tip of the right shape.

Everything should be done carefully, observing safety precautions, mainly to ensure that the spring in the case of an accidental escape does not injure the master.

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Disassembly of the starter unit

Disassemble the starter mechanism to install new parts to replace the broken parts in the following sequence:

  • unscrew the screw fixing the pulley with the starter cover with a screwdriver;
  • take out the spring and the tendons;
  • remove carefully the pulley (it is necessary to turn the head or work, wearing goggles and gloves beforehand);
  • determine why the starter mechanism is broken;
  • if the spring has collapsed almost completely, it is replaced;
  • when the spring is out of the hook, it is installed in its original place, having bent before (the photos show the process of laying);

Minor engine repairs: replace the starter cord on a Briggs mower

Always follow service and maintenance instructions when doing repairs or maintenance work on equipment. Manuals are available on the website of the manufacturer.

In this video, I’ll replace the starter cord on a Briggs Stratton 650 Series mower engine. The handle of the mower cord attaches to the handle of the mower itself. The cord to start this engine is 7 feet long. The length of the cord may vary slightly, it depends on the stiffness of the cord. If the stiffness of the cord used is great, the cord may kink. If this happens, cut the cord to 6.5 feet and try again. The tools used:. wrenches. socket set. Phillips and straight screwdriver. fine pliers. lighter or matches In this video I am going to show you how to replace the starter cord on a 650 series Briggs Stratton mower engine. This is the common motor for this series. The cord connects here to this part on the handle and you actually start pulling from here. The length of the starter cord should be about 2 meters is a safe length. I measured the cord we have here and cut it into 2 meter lengths. The cord number is 4.5. It is important to take the right size, because if you use too thick. you can’t fill it up very well on the mower. If you pull that cut cord. these cords will start to come out. So you need to, melt the ends of these strands with a lighter or match to heat them up and melt them and then slide them down with your fingers like this. And at both ends. This will make installation much easier and prevent the rope from unraveling. The next thing you have to do is attach the cord to the handle that you’re pulling on. and pull it through the handle and pull it through. If you can’t tuck it in, you can use tweezers to grasp the cord and pull. Now make a knot at the end. and tighten it back into the handle a couple of centimeters. Now we need to remove the shroud from the motor. On this engine, you first remove this decorative part and put it aside. And on this engine, the gas tank is attached with three bolts on the top and one on the side. We need to remove the gas tank to get to the hood. Now the bolt on the side. You can simply hang the gas tank nearby. There is one more bracket that we will need to remove. This is the oil level gauge tube. Take it off. Now we can remove the cover. It’s attached with 4 10 bolts, you’ll need a head. 2 bolts in the front and 2 in the back. And now you can remove the shroud. This is the kickstarter assembly with the return mechanism, right there is a small hole where the cord goes. And here on the outside this cord goes into this assembly. It is necessary that the mechanism rotates counterclockwise. It takes about 7 turns to start and then after the mechanism is wound you can let go of the rope. So let’s do it. See. 1. 2. 3. 4. 5. 6. 7. Once you wind the spring, you can take the cord and pull it through this hole. To do this, I might need some tweezers. Then, once I’ve pulled through the hole I can take a screwdriver and block the rotation of the mechanism The screwdriver will prevent the mechanism from spinning so I can tie the knot. A regular knot, like we did on the handle. And then remove the screwdriver, and holding the cord, allow the mechanism to return to its original state. There you have it. Now you can reassemble the cowl. To reassemble, just put the hood back in place. Screw back the 4 bolts, 2 in front and 2 behind. Screwdriver and sockets are great for tightening small bolts. But be careful not to overpower them. Attach dipstick to shroud. And secure the fuel tank. Three bolts on the top and one bolt on the side. And then install this decorative panel. Now you can pull the cord and pull it out. I removed the spark plugs from the engine so I could demonstrate this in the video. At any rate, pull it out and attach it to the hook on the handle. That’s all. Let’s see if we can get it started by holding the camera. Briefly. What I did. on this type of mower I used a 4.5 m cord of 2 meters length, and when I took the cover off, I screwed the return mechanism 7 times before I put the cord in. That’s actually all there is to do, it’s a pretty simple job. I hope you find this video useful and thanks for watching. _

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