Viking lawn mower DIY repair

In detail: do-it-yourself viking lawn mower from a real master for the site my.housecope.com.

The active operation of garden equipment leads to an early failure of individual units or parts. There is no need to dispose of the equipment, as it may still be useful in the future. After all, having sometimes carried out a small repair of the lawn mower with your own hands, you can return it to its previous working state.

Depending on the area of the lawn and the growth of the grass on it, the owners choose the technique that is optimal in terms of characteristics. It can be of several types:

gasoline devices;
units with an electric motor;
battery-powered equipment.

The mower of an average price can withstand the climatic conditions of St. Petersburg, Moscow or similar regions for about four seasons. More expensive or less exploited garden helpers are able to withstand 5-6 seasons in the field.

Also, the restoration of lawn mowers with your own hands will be required if the winter storage conditions turned out to be inappropriate. For example, work surfaces were not cleaned after use or there was no off-season preventive maintenance. As a result, various problems appear:

frequent sharpening of lawn mower knives is required;
the lawn mower just won't start;
the engine starts, but after a short time the mower stalls;
malfunctions appear at the carburetor, which requires not only disassembly, but also cleaning and repair;
DIY lawn mower repair is required with a significant decrease in power during operation.

You shouldn't go to an expensive service center. Many problems can be solved with minimal costs and repairs can be carried out on their own.

Video (click to play).

The cutting elements must be cleaned after each use. Change oil regularly and carry out maintenance to minimize the risk of damage.

VIDEO: How to lubricate a brushcutter or trimmer gearbox

Mowers, inside which the electric motors are located, most often begin to be capricious due to the oxidation of the contacts. The terminals are covered with a layer of scale from excess moisture in the room or in another storage location. It is also worth checking the absence of wire breaks in problem areas. A multimeter or other type of tester is used for this operation.

Dismantling the Electric Lawn Mower

When a set of garden equipment contains a brush motor, then we identify the operability of the movable unit. Brushes can wear out quickly, resulting in a lack of contact. A repair kit with them costs relatively little, and it is easy to find it in specialized stores, where they sell spare parts for such equipment.

Malfunctions lie in wait for asynchronous motors. Phase-shifting capacitors fail in them. This situation is problematic to diagnose at home. It can be identified by indirect symptoms:

a humming sound is heard;
at the start, the body twitches slightly;
there is a significant heating of the motor even at low load;
turnover decreases.

It is worth diagnosing the state of the toggle switch / button and supplying voltage to the electric motor. When the described nodes have been tested, and no malfunctions have been found, it is unlikely that it will be possible to fix the breakdown of the lawn mower with your own hands. Then you will have to use the services of a corporate service.

VIDEO: The electric lawn mower does not start well, the motor jams, the brake clutch is repaired

Primary diagnostics is carried out from the stage of eliminating the most obvious breakdowns. When the engine does not start, it is worth checking the presence of fuel in the tank.If there are remnants of it from last season, then it is worth replacing it. After wintering, low-quality gasoline can lose its characteristics, give an undesirable sediment or even stratify into fractions by density. In this form, he is not able to start the engine, but only clogs the system.General diagram of a gasoline lawn mowerAt the second stage, we find out why the spark does not appear. Its loss will prevent the fuel from igniting. We remove the cap from the candle and unscrew it from the seat with the special key that came with the mower. Next, we put the cap on the candle, bring it closer to the threaded part or the metal element of the motor, and at this time the partner pulls the starter.With such manipulations, a powerful blue spark must appear in the working unit. It can be seen even in daylight. It is important to test this next to an unpainted metal part of the motor that can conduct current.When there is no spark, you need to go to the store for a new candle. Do not return to engine even if spark is weak or unstable. Beforehand, it is better to clean the working contacts from carbon deposits on the head.During operation, rattling may appear in the structure. At first, it does not affect the performance of the mechanism as a whole. However, it can lead to imbalance and increased noise during operation. It is worth tightening the fastening bolts on the frame in a timely manner.Tightening the fixing bolts on the frameAn uneven cut in the grass is an indication that the lawn mower knife needs to be sharpened. Accessing them is not that difficult, but it is important to completely disconnect the equipment from the power supply. Independent work can be carried out using a yew and a file or on a sharpening emery. It is important to ensure that the cut angle is uniform along the entire 30 degree line. If there are chipped areas in the surface, this is evidence of hitting a hard surface. Replacing them will be quite expensive.A whistling sound appears after switching on. An unpleasant acoustic effect is associated with the penetration of foreign elements into the structure. They can block the roller in the aerator. You can solve the problem by disabling the locked roller and then removing the foreign object.The motor of gasoline equipment becomes almost immediately after the start of a short period of work. The culprit is a jammed crankshaft or piston. At the same time, we check the presence of oil in the crankcase. With the engine turned off, manually start the rotation or add oil as needed. However, in such a situation, more often you have to turn to specialists for recovery.VIDEO: The main reason for the breakdown and repair of the self-propelled drive of gasoline lawn mowers

TOREX combination reversible screwdriver with bits

We inspect the gaskets for breaks or burnout. If this is found, then it is necessary to ensure the tightness of the structure by replacing them with new ones. The air damper can contain carbon deposits that reduce the quality of the air / fuel mixture. You need to get rid of it by cleaning the carburetor by washing the unit in a solvent or kerosene.

Choking during operation or the lack of a set of them to enter the operating mode together with overheating of the power unit are the reasons for such events:

Violation of idle speed adjustment. You can unscrew the jets to the correct position using a screwdriver yourself. It will be possible to do this even by ear, so that the motor runs smoothly. The knives do not need to be removed, but they should not rotate.
The air filter is dirty.It is enough to remove it outside and clean, rinse. We dry naturally in the wind, without placing it near the stove or fireplace.

Use a flat screwdriver to remove the air filter cover

After removing the cover, also carefully remove the air hose

Remove the carburetor fuel chamber cover and clean it. For this, an ordinary vadashka is quite suitable, but you can also buy a special liquid.

To clean the fuel chamber, first wipe it with WD-40, then soak it for 15-20 minutes, wipe it again. This should be repeated 3-4 times to completely clean the chamber and channels.

After purging, the carburetor is assembled and returned to its place.

A clogged exhaust will result in a restriction of the exhaust flow from the exhaust pipe. Resins appear on the inner surface due to an incorrect ratio in the mixture of fuel and oil. We twist the crankshaft so that the piston goes up to the maximum and clean its surface with a wooden stick.

In more serious cases, it is recommended to contact the service under warranty. Otherwise, non-professionalism will bring more breakdowns. Moreover, if you independently search for faults and repairs during the warranty period, the warranty will expire.

VIDEO: Instructions for disassembling and cleaning the carburetor using the example of BRIGGS & STRATTON

Repair of lawn mowers is carried out taking into account the principle of operation and the cause of the breakdown of the unit. Most often, the device fails in 3-4 years after active use. Image - Viking lawn mower DIY repair

Repair of lawn mowers is necessary in the following cases:

the device will not start;
the unit quickly stalls after starting;
the motor is not running at full power.

Reasons for failure of lawn mowers:

In the first case, you will need to replace the body, handles, knives and wheels for lawn mowers. When the blades are blocked, the machine stops mechanically. Such a breakdown is associated with an attempt to mow hard or tall grass. Repairing the mower consists in freeing the cylinder from the stuck grass and rolling it in the other direction.

When operating the mower with a blunt or damaged blade, the grass is mowed unevenly. In this case, the device may vibrate or stop abruptly.

For the device to work properly, it is recommended to file the knives (30 ° angle). Otherwise, an abrasive tape is used. The gap should be between the 2 blades, touching the strip. The device is switched on periodically (15 seconds each). If the knives are sharp, then the strip is removed, the gap is adjusted.

If the blades are in the wrong position, the cylindrical lawnmower makes sudden and uncontrollable movements. Normally, the gap between the cutting elements should be thinner than a sheet of paper. Otherwise, the clearance is adjusted. It is preliminarily recommended to study the instruction manual of the device, to remove the plug from the socket. When the connection is loose, a whistle appears. The device vibrates and rattles. Repairing a lawn mower means adjusting the bolt connections.

If the belt breaks or stretches, then it must be replaced. This requires loosening the screws. Then the pulley moves, the belt is dismantled. The new part is slipped onto the small pulley and then onto the large pulley. The gear returns to its original position. The next step is to check the tension of the new belt. The deflection should not exceed 4 mm.

The reasons for the unexpected shutdown of the electric lawnmower are associated with a broken cord or a lack of current. In the first case, it is recommended to check the cable for breakage. To replace the power cord, you will need to unplug the power plug and open and remove the switch cover.

Before unscrewing the cable retainer? it is necessary to remember the diagram of its connection to the switch. To disconnect the cord, use a hexagon socket (1 mm diameter). The clamp is released, the conductors are dismantled. A multimeter is used to check the cable for breakage. A new cord is installed if necessary.In this case, the reverse sequence is observed.

In the second case, it is recommended to connect another device to the mains. Electrical devices may not work if the fuse in the plug is damaged. To carry out repair work, you will need to disassemble the plug. For this, a screwdriver and a tester are used.

Motor problems occur when the mower overheats:

as a result of long-term work;
overload (the cutting element is blocked by an object).

In the first case, it is recommended to wait a few minutes for the motor to cool down. In the second case, you will need to remove the stuck object. The efficiency of the cooling system depends on the condition of the air filter. A dirty device does not allow air to pass through well, which contributes to the shutdown of the device. Experts advise to clean and change the filter every 3 months (with constant use of the lawn mower). When the electric motor breaks down, there is a corresponding smell and noise. In this case, the drive will need to be replaced.

The design of a gasoline lawn mower, in contrast to an electric analogue, is more complicated. In some cases, the unit cannot be repaired. If the engine does not start or stops immediately, then it is recommended to check the ignition. To do this, you need to dismantle the candle. A dry plug indicates a problem in the feed system, and a wet plug indicates a carburetor. In such cases, repair work is carried out by professionals.

If the candle has black carbon deposits, then it is replaced. This does not take into account the reason for the breakdown of the lawn mower (carburetor setting, low-quality fuel). Often on petrol models, the fuel hose becomes clogged. If gasoline does not flow, then the saloon is cleaned with a needle, and the fuel filter is replaced with a new analogue.

If the mower does not cut the grass, then check the blades. If necessary, they are replaced with new cutting elements or sharpened on emery. In the second case, it is recommended to use protective goggles and thick gloves. You can sharpen the mower blades using the special tools included with the device.

If the blades are blocked by long grass, then it is advisable to turn off the mower. The cylinder is scrolled with a wooden stick (in the other direction) until it rotates freely. If the mower does not work as a result of a faulty switch, then it is recommended to check it and replace it with a working analog.

In the absence of voltage in the outlet, the shield is checked. Some devices are equipped with thermal protectors. When such a system is triggered, the ventilation grilles are checked for contamination. A soft brush is used to clean them.Repair of mechanical mowers is carried out when the cutting elements are blunt or damaged. In this case, experts recommend dismantling the removable knives yourself. Emery is used to sharpen them. The battery is replaced if necessary in rechargeable models.Before repairing the mower, the type of motor is determined:

Electric - the motor is powered by current. The unit shuts down due to overheating or overload. Some models do not have overheating protection. In case of mechanical damage to the engine, you will need the help of professionals.

Gasoline - the device fails as a result of overheating, overload, breakdown of the oil and fuel supply circuit. Gasoline lawn mowers, unlike electric models, take longer to repair.

Cleaning the mechanical part of the Bosh lawn mower

Broken or bent knives are visible to the naked eye. Depending on the material and the degree of damage, the knives are replaced or restored by simply folding them back to their original state. With heavy wear, the cutting part can be sharpened. A do-it-yourself lawn mower from a trimmer can fail for many reasons. Most often, this is an excess of the maximum permissible torque and engine load, since a knife is used instead of a fishing line.

Restoration of the throttle handle

During inspection, check the condition of the grass supply duct into the container and clean it if necessary. More complex mechanical failures require a complex tool, special equipment, professional skills, and it is better to entrust the elimination of such malfunctions to professionals.

Not only factory, but also home-made electric lawn mowers fail. The main reason for stopping the electric motor is loss of contact and lack of power at the motor terminals.

Drawing of an electric lawn mower using the example of TBH 1650

Therefore, first of all, we check the presence of voltage in the power outlet, the condition of the electrical cord and the absence of its breakage. Then, if a collector motor is used, you need to check the condition of the brushes and replace them with severe wear. The brushed hand lawnmower offers increased durability, but requires regular brush replacement.

DIY electric mower engine repair

Asynchronous motor hand mowers also have problems. A phase-shifting capacitor often fails, but testing it in the field is problematic. An indirect symptom of a capacitor failure is:

jerking of the motor at the time of power supply;
strong heating of the engine even at low load;
reduced speed;
characteristic buzz.

Do-it-yourself electric lawn mower is made from scrap materials that can fail. If a malfunction is detected, in any case, you need to make sure that voltage is supplied to the motor terminals, and if it is absent, check the operation of the switch.

DIY electric lawn mower

If there is voltage, the capacitor or brushes are in order, then the most likely cause of failure is a burned-out winding. In this case, the unit will have to be handed over to a repair shop. Home-made electric lawn mowers most often have to be repaired on their own, since when assembling the device, all the nuances of its work are not taken into account.

Lawn mowers use gasoline two-stroke internal combustion engines. When deciding how to make a lawn mower with your own hands, they often use engines from other household devices - chainsaws, compressors, motor plows and trimmers. The process of finding and eliminating the problems of these engines is carried out according to one algorithm. Do-it-yourself gasoline lawn mower repair begins with determining the cause of the failure. Image - Viking lawn mower DIY repair

General diagram of a gasoline lawn mower

In this case, failure of the mechanical part is guaranteed or, as an option, its attachment to the motor shaft is destroyed.

Damage to the mechanical part and repair of the viking lawn mower do it yourself

A do-it-yourself mechanical lawn mower with a gasoline engine does not start well, but it works normally in operating modes (when gas is supplied). Such a malfunction can be caused by two reasons - a malfunction of the idle speed system in the carburetor or an incorrect fuel composition.

Exploded drawing of a petrol lawn mower

To eliminate it, you should start with fuel, combine gasoline and oil of the required brands in the required proportion and pour this fuel into the tank instead of the old one. If this does not help, remove and disassemble the carburetor and adjust the idle system in accordance with the manufacturer's instructions.

Most likely causes: clogged fuel jets, clogged fuel filter, clogged air filter. For elimination: jets are blown with compressed air, filters are changed or washed, depending on their design.

Bosh lawn mower engine repair

If the engine starts and runs at idle, but does not hold the load poorly during operation. Most likely, "oxygen starvation" takes place. Do-it-yourself lawn mower repairs are performed by replacing or cleaning the “blow-through” air filter.

It happens that, despite the presence and normal supply of fuel, the engine does not start. Most often, the absence of signs of life indicates a failure of the ignition coil. If, upon visual inspection, all electrical circuits are in order, then this coil will need to be replaced.

DIY lawn mower engine repair

A less common occurrence is heavy carbon deposits or spark plug failure. It is determined by visual inspection of an unscrewed candle. The most effective way to determine this malfunction is to replace the spark plug with another one that is known to be working properly.When thinking about how to make a lawn mower if the engine does not start, pay attention to replacing the spark plugs with new ones, and preferably more reliable ones.

Taking into account the peculiarity of the “field conditions” in which lawn mowers are operated, the manufacturers of these devices tried to protect their consumers from possible problems as much as possible. But, as you know, even a manual manual lawn mower, made with your own hands, can fail one day. We really hope that our tips will help you in this case and will direct your troubleshooting in the right direction.Hello! In this article, we will get acquainted with general recommendations for repairing do-it-yourself lawn mowers. And to be more precise, electric lawn mowers, although the principle of their construction is generally the same everywhere, be it electric or gasoline. The drive will only be different. There are several types of electric lawn mowers. They are cylindrical, rotary and mulching. Let's consider the principle of operation and the device of each separately. This gives us the opportunity to successfully repair lawn mowers with our own hands and operate them correctly.These lawn mowers have a set of spiral blades that together form a cylinder. The knives are driven by a large toothed pulley mounted on their axle. The rotation of the electric motor is transmitted to the knives by means of a toothed belt. The lawn mower is moved using a roller, which is driven by the same knife drive electric motor. Image - Viking lawn mower DIY repair

As the cylinder rotates, the knives press the grass against the fixed knife, thereby cutting the grass. The cutting height in this type of lawn mower is adjusted using a roller or wheels mounted in front and behind the knives.

Rotary lawn mowers are equipped with a single horizontally positioned blade attached to the motor shaft.

When rotating at high speed, the knife cuts the grass. Rotary lawn mowers of different models have wheels, and some more modern ones are made on air cushion.

Many lawn mowers have containers for clippings. Those mowers that chop the grass into small pieces and leave them on the lawn as mulch.

All modern lawn mowers are equipped with devices that ensure safety during operation by the fact that there are special handles that must be activated at the same time, emergency shutdown and safety interlock buttons. This must be taken into account when repairing lawn mowers with your own hands. If you are tired or unsatisfied, do not start mowing the lawn. Postpone this activity until you are healthy. Avoid putting yourself and others at increased risk from the mower in operation.
Make sure the power cord and protective covers on the windrower are intact before plugging into the power outlet. Unwind the power cord completely and place it so that it does not fall into the mowing area during operation. And do not forget one more important point. Examine the lawn carefully for small stones, bones, etc. They can damage the knives or be thrown to the side by the operating knives. Place the power cord on your shoulder and hold the mower handle securely with both hands. After that, you can press the switch and start mowing the grass.

1.Knives are dull or damaged ... In this case, of course, you need to check the knives and, if necessary, you can replace them with new ones or sharpen them on emery.

If you have a lot of time, you can work with a file. When sharpening, do not neglect goggles and thick gloves. The knives are sharpened on each side at an angle of about 30 degrees. You can also use special sharpening devices supplied by the manufacturer of this mower model. This is mainly done using adhesive abrasive belts on the fixed blade of the mower.

In this case, the gap between the fixed and movable knives is set small so that the rotating knives touch the abrasive belt.

Then plug the mower in and drive the machine at short 15 second intervals until the blades are sharp. Remove the abrasive belt and adjust the normal gap.

2. Incorrect blade adjustment ... On cylindrical lawn mowers, the gap between the rotating cylinder and the bedknife should be less than the thickness of the paper.

To do this, refer to the user manual for your particular lawn mower model. Disconnect the plug from the socket before adjusting. Achieve uniform clearance along the entire length of the cutting blade.

1 stuck knives ... Long grass can block the mower blades. Unplug the mower and use a wooden stick to turn the cylinder in the opposite direction until it turns freely.

2. The drive belt is broken. ... When a cylindrical mower is operating, the drive belt wears out and this leads to its frequent breakage or stretching. To replace the belt, do the following:
- remove the protective belt cover and you will see if the belt has fallen off or broken

- loosen the screws securing the engine and slide the small drive pulley towards the large one.

Install the new belt on the small gear and gradually turn the large pulley, put the belt on it
- tension the belt by sliding the small pulley away from the large one.

A correctly tensioned belt should have no more than 4mm deflection when pressed with your finger.

3. Broken power cord ... When operating the mower, the power cord moves around the lawn and constantly bends. As a result, the copper conductors of the power cord are often broken. Therefore, if the mower is silent, then start the repair of lawn mowers by checking the supply cable for an open. To replace the power cord, unplug the power plug, unscrew the switch cover and set it aside.

Before unscrewing the power cord retainer, remember how it was connected to the switch.

To disconnect the cord, insert a 1mm Allen key into the holes with the conductors.

This will release the clamp and the conductors can be removed.

Now, with a multimeter, check the cord for an open circuit. Prepare a new power cord if necessary. Reinstall the power cord in reverse order.
4. Defective power switch ... Check it and replace it with a good one if necessary.
5. There is no voltage in the socket ... Make sure that the protection on your shield has not worked.
6. The mower is not plugged in .
7. The fuse in the mower plug has blown. ... If your lawn mower has a special. plug, it most likely has a built-in fuse. Disassemble the plug and ring the fuse with a tester.
8. The thermal protection of the mower motor has tripped. ... Some lawn mower models have this protection. It shuts off the drive if it overheats or if the mower blade is blocked by something. Checking the mower vents for dirt is a good idea. Clean them with a soft brush if necessary. The thermal protection will turn on the drive itself as soon as it cools down. This concludes the article on repairing lawn mowers. I also recommend reading useful posts jigsaw repair, refrigerator repair yourself. Success in troubleshooting!

Lawn mowers have become one of the most essential garden helpers. Timely maintenance is one of the main ways to ensure long-term trouble-free operation of this type of equipment. But even with proper care, breakdowns can occur and then you simply cannot do without performing repair work. To eliminate complex breakdowns, of course, it is better to contact a service center. A simple repair of a lawn mower can be done with your own hands. Since lawn mowers are of different types, you may experience different breakdowns.

The most widespread are two categories of lawn care equipment, these are:

• Electric lawn mowers;
• Gasoline lawn mowers;

All other devices are, as a rule, varieties of the listed types.

Mechanical lawn mowers constitute a special category. But, as a rule, their design is so simple and reliable that repair work will not be required for a long time. The only thing is that with a decrease in the quality of mowing, you will need to adjust the knives of the spindle lawn mower. You can learn how to do this in this article.

Since electric lawn mowers are a device that depends on electrical equipment for their operation, the most frequent breakdowns are associated with malfunctions of the electrical circuit.

The first sign of such a malfunction is that the mower will not turn on after connecting to the network. In this case, we determine the possible cause of the breakdown. What are we doing.

1. Using a measuring device - tester or probe, we check the presence of electricity at the connection point. We make sure that the outlet is working. If there are no instruments at hand, then you can get by with any available electrical appliance - a table lamp or even a phone charger. If the socket is working, then we proceed to check the electrical equipment of the lawn mower.
2. We check the integrity of the electrical cable;
3. The efficiency of the power button.

You will need a tester to complete the last two points. But you can do it easier - replace the electrical cable and start button with obviously working ones.
If all of the above actions did not lead to a positive result, then most likely the cause of the breakdown is a faulty lawn mower engine. In this case, you cannot do without contacting the service center.

This type of technique is the most popular among gardeners. In the event of a breakdown, you cannot do without specialists, and you may need special spare parts for the lawn mower. But first you need to make sure whether a breakdown has actually happened. To do this, we must check several "painful" points of this technique, namely the state:

• Spark plug;
• Air filter element;
• Setting up the carburetor;
• Fuel filter;
• Condition of the muffler;

The lawn mower engine may not start for several reasons, the main ones being:

• Fuel does not enter the combustion chamber;
• There is no spark.

Determining the cause can be quite simple - just remove the spark plug.

In the event that the candle is covered with friable carbon deposits, the cause of the "malfunction" may be the use of low-quality fuel, the use of a lawn mower without an air filter. Non-combustible substances settle on the contacts of the candle and cause a short circuit and, as a result, the absence of a spark. You can do the following:
• Drain the remaining fuel from the tank;
• We clean the contacts of the candle, or change it to a new one;
• We check the presence and condition of the air filter, if necessary, wash it or replace it.

The spark plug is clean and dry. An air lock may have formed in the fuel line and no fuel is being delivered.
The logical action is to purge the fuel line, replace the fuel filter, if used. The reason may be a clogged jet in the carburetor float chamber, but it is better to entrust the repair of such a malfunction to a specialist.

In the third case, the candle is wet and clean. Fuel comes in, but there is no spark.

• Defective spark plug;
• Breakdown of a high-voltage wire;
• Breaker breakage.

The problem is solved by replacing the listed parts.

We have described the typical malfunctions inherent in a particular type of technology. And there are common breakdowns for both electric and gasoline lawn mowers.

What kind of lawn mower malfunctions you may encounter, their symptoms:

• Extraneous sounds when working in the mower deck area. Knocking, rattling - these are signs of poor tightening of fasteners.This is a fairly common case, since the operation of lawn mowers is accompanied by vibration, which affects the tightening of nuts and bolts. The tightening of the fasteners must be monitored constantly.
• Strong vibration when turning on the mower blade. Reasons - knife breakage, loosening of its attachment. A broken knife needs to be replaced, a loose attachment is brought back to normal with a key;

• The appearance of a whistle during work is the result of a hard object hitting the mowing unit. It is enough to stop the work and remove the object that interferes with the work of the lawn mower;

• The mowing quality has worsened - it's time to sharpen or replace the mower blade. You can learn how to sharpen a lawn mower knife from the review "How to sharpen a lawn mower knife with your own hands"

The malfunction of the Ride-On Lawnmower may be in the drive system. Uneven or no movement is a sign of worn drive belt or loose clutch cable. The mower drive belt can be replaced by yourself, adjusting the cable is also not difficult.

Video (click to play).

As you can see, many malfunctions of the lawn mower are the result of failure to perform routine maintenance. Many troubles can be avoided by timely performing the manufacturer's recommended maintenance work on the lawn mower, using the tool only for the work for which it is intended.