Lawn mower blade does not unscrew. Ways

How to unscrew the bolt on the lawnmower. How to remove the blade on an electric lawnmower

Lawn mowers, like all machines, are not built to last forever. There come times when certain parts wear out and need the user’s attention. In such cases, it is important not to ignore the features of the device and perform all operations on quality maintenance.

Of course, it is possible to address to professionals, but many operations can be easily performed by the owners themselves, the main thing is to know how to perform the repair and to follow the instructions precisely.

Purpose of the weeder blade WINDSOR 300-3 2 mm (1)

for mowing hard weeds; for uncut and intertwined grass and weeds (makes it difficult to mow); and it is the right knife (the best for me); it can mow everything! (the middle of the knife is wider).

We compare the Windsor knife to the Husqvarna knife

  • It unwinds more easily.
  • It is easier to move (lightweight).
  • It is easier to sharpen (the metal is weaker) and there is no question of how to sharpen.
  • It cuts more easily (thinner).
  • It can mow smaller, sparser grass.
  • But such a brushcutter blade wears out quickly: in some places it is three times as sharp as Husqvarna blades.
  • But it bends, for example, when it hits a hard stump.
  • But it has less inertia to churn.

How to Change Oil

For everyone who is periodically confronted with mowing weeds, the lawnmower is an indispensable thing. A simple device, however, sometimes requires maintenance, which includes changing the oil used to cool the mechanism, which allows the motor to function at high speeds.

In addition, the oil serves to protect the parts of the electrical device stored in sub-zero temperatures.

The intervals for changing the oil are determined by the technical condition of the engine. For new machines, the oil in the mower has to be changed immediately after the break-in period, i.e.е. after 5-6 hours of continuous operation.

Subsequently, change after another 5 to 10 hours. No debris accumulates in the motor. In an engine that is not new, the period between oil changes extends to 25-50 hours, which corresponds to 2-3 months.

Determine that the oil needs to be replaced you can also by its color: as soon as there is a black tint, you need to make a replacement, so as not to jam the motor.

The whole process of changing the fluid is divided into stages:

  • draining the old oil;
  • turning the electric lawnmower with the drain hole facing down;
  • setting the device in a horizontal position;
  • pour new oil through throat up to the mark on the crankcase.

What oil to pour into the lawnmower depends on the ambient temperature in which the garden tool is used. It is proper to use SAE-30 fluid if it is 5 to 30 degrees outside. 10W-30 oil is suitable for the off-season, while 5W-30 is preferable for winter.

You cannot ignore Synthetic 5W-30. a reliable product that ensures the operation of the device at low subzero temperatures.

trimmer line is used as a cutting tool. It is advisable to choose the diameter that is designed for this type of mower. If it is taken with a larger diameter, it can cause overheating and failure of the motor and bushings.

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If you choose a smaller diameter line, the working efficiency is reduced and the consumption of the line itself is increased.

There are two ways to change a line for the trimmer:

If the first method is chosen, it is important to wind the line for the trimmer on the lawnmower correctly, for this purpose hold the bobbin with one hand and the other unscrew the pressure head, rotated by the clock hand.

Then check to see if the bolt moves freely inside.

Then remove the bobbin and the spring inside it. Wipe them with a rag. Also clean the shaft and the inside of the housing. After that, the line for the trimmer is folded in half, and the ends are passed into the two retaining grooves.

By pulling it taut, reduce the loop to a minimum. The line should be 7.5 meters long, and the coils should lie tightly against each other. The line for the trimmer is wound in the direction indicated on the bobbin with both ends at once, placing your index finger between them to avoid overlapping.

Installing the spring in the bobbin, the latter is placed in the housing. Then by pulling sharply on both ends at the same time pull it out of the grooves.

Important: The spring is placed in the bobbin before assembling the bobbin. The assembled spool is installed in the pressure head, then, it is screwed counterclockwise.

Also change the line for the trimmer on the lawnmower, replacing the bobbin with a new one, on which the line for the trimmer is already wound: the spring is removed from the bobbin case, wiped as above, reinstalled in a new bobbin with a line spring, put the ends of the line in the bobbin case.

It remains to put in place the bobbin, set the correct pressure head and screw it by turning counterclockwise.

It is even easier to replace the cable for the lawnmower: you need to buy a new one and install it in place of the damaged one.

A common cause of mower hand starter breakage is the spring, which can be replaced by anyone. Enough to unscrew the starter, remove the pulley, unscrewing the screw and releasing the spring. It can be bought separately, as well as the entire starter, but can be repaired with your own hands.

After replacing the spring with a new one, install the pulley on it and perform the actions in the reverse order. Then the cable is screwed on, so that the spring stands with the tension.

Maintenance / Partner Lawn Mower / Video Instruction

How to wind the line for the trimmer on the lawnmower by yourself

When spring arrives, people often spend their free time in the country. They try with the onset of warm days to save their site from problems such as weeds and grass.

It’s hard to do by hand, especially if the area is very large, so a lawn mower can help. With this technique you can cut the grass and remove weeds. it is a suitable device for mowing unwanted plants near the fence, at home, between the rows in the garden in the flower bed, and so on. To learn how to choose the lawn trimmer that’s right for your needs, read here.

Cutting element in this device is a line for trimmer (strong polyethylene thread), which is wound on a special element. a spool. But over time, the trimmer blade wears out and needs to be replaced.

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Reasons to remove the blade

Among the common reasons for removing or replacing the cutting element are the following:

When the knife is blunt, bent or deformed, the lawn looks untidy after mowing. Correct the situation by a competent sharpening.

Professionals recommend the procedure once a year. It is better to do it in the spring, before starting work. If the cutting elements get blunt faster, they need to be sharpened more often.

If the blades show chips, cracks, or it is badly worn down and became thin, in this case it is necessary to replace. There is no sense in sharpening such tools. In addition, the blade can break at any time and fly out from under the machine body, injuring people or animals nearby. Such a device can also lead to engine failure. It is allowed to change the item for a similar model. You can find the specifications of the blade in the instructions.

If there is no suitable product in the store, you can always buy blades of shorter length. In this case, it will take a little longer to tidy up the lawn than before. But that’s no problem, compared to the fact that the wrong blade is sometimes impossible to securely fasten to the garden equipment. Then the way out is the universal lawnmower blades. These are blades that come with adapters, bolts, washers, etc. The blades themselves have several different settings. As a result, the cutting elements can be fixed to completely different models.

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Cleaning the blade before sharpening

The knife is thoroughly cleaned before it is sharpened. Plant sap and small grass particles collect on the steel strips. The juice hardens over time and turns into a hard crust. Do not wash the blades, it is best to find a sharp metal scraper in the garage or use a scratch brush.

It is not necessary to polish the cutting element of the machine to a shine, the main thing is to remove the adhered debris. After that you need to improve the blade by straightening it and removing any irregularities. Bumps are caused by hard debris and stones on the blade. The right option in this case is to work with a hammer. With this tool and a flat work surface on which the knife is placed, all local curvatures can be corrected.

Experts advise to start leveling the blade from the edge, gradually moving to the middle part. As a result, the steel strip should become as even as possible. Only in this case it will be able to perform its function, creating an air flow that carries the grass into the tank for the collection of plant residues.

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Sharpening of cutting elements is organized as needed. Many people ask the question: “Does a new blade need sharpening??”. The answer is no. These elements are sharpened at the factory. After the purchase of a garden machine it can be used without any additional work on removing and sharpening the blades.

There are two ways to sharpen the cutting element of a lawn mower:


In the first case, the work is organized if the blades are in relatively good condition and blunted only slightly. Usually such sharpening is used if the owner sharpen the cutting elements of his garden tools several times a season. If this is the case, it is enough to file the edges and touch them up.

During work, roundings of the blade, roughnesses are removed. It is important to maintain the factory sharpening angles and the escapement. Both sides (blades) are ground evenly. The sharpener is kept in the same position. You can not allow imbalance, in which you can not achieve coordinated work of the blades. Such a problem will cause rapid wear of the assemblies (bearings).

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After the basic sharpening, the edges should be straightened. This is to remove the smallest chips. It is best to use an emery cloth with a grain size of 800 grit. Dressing consists in a slight displacement of the paper along the plane of the slopes.

With the machine

The machine will help to cope with the work quickly and without applying great effort. The main thing in this case is not to get too sharp edges. If you sharpen them as thin as a razor, there is a great risk of chipping and breaking.

While working, it is important to keep the right angle and remove the metal from the blades in the same amount. The machine does not get rid of edge dressing with sandpaper.

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Blade sharpening

The purpose of the sharpening is to eliminate fine chipping of the edge and to bring the escapement into one straight plane. The “file” on the blade causes a rapid decrease in sharpness, and with a rounded trigger, there is too much impact on the cut stalks. In addition, a blade with a rounded design will get dirty much faster.

The best way to sharpen your blade is to use a flat emery stone with about 400-600 grit, more “delicate” stones do not make much sense. Soak the stone in soapy water for 10-15 minutes and periodically wet it during sharpening. Sharpen the knife also on the grain, with the stone sliding slightly from the center to the edge of the area to be sharpened.

When sharpening, try to hold the stone in the same position, so as to maintain a constant angle. As with the descents, sharpening should be carried out with the condition that the same amount of metal is removed from the opposite blades. This condition, however, does not have to be strictly observed when sharpening four-blade knives.

Rules for setting the knife

After the knife has been sharpened, it should be put back. Installing the cutting elements is not very difficult. The main thing is to follow the rules:

  • Determine in what position the knife was in before.
  • In the same position, secure it with a new or old bolt, washer and nut.
  • Do not over tighten the nuts. This will cause deformation of the cutter.
  • During work wear thick gloves. It is important to remember that renewed blades are sharp.
  • Once the mower is in its normal position on the ground, do not start it up immediately. Wait an hour to allow the oil to drain off the walls of the housing.

The tricks to removing the cutting element from the lawnmower can be figured out even by a novice gardener. However, when sharpening yourself, you should be extremely careful not to hurt yourself and not to remove too much metal, thinning the knife.

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