How To Change A Candle On The Al-Ko Lawnmower
It would seem, why a chainsaw to a summer resident, who is engaged in the cultivation of vegetables and fruits, or to the owner of a country house, which has a small garden and several flower beds? The question disappears when there is a desire to build a bathhouse, to renew a greenhouse, to tumble down an old business or just to make a bench for rest. Unfortunately, any mechanism periodically needs to be prevented and parts replaced, and for this it is necessary to understand the device’s structure well, besides, repairing a chainsaw with your own hands will save time and money.
Structural components of chainsaws
All chainsaws are similar in structure, regardless of whether they are European-made (ECHO, Stihl, Husqvarna) or domestic (Cedar, Ural). The main elements are located inside the case. A fuel tank and an engine, and outside the starter, handle, saw part (tire) with a chain. A sharp jerk of the cable starts the engine, and that. The saw blade.
To get started, we suggest you familiarize yourself with the clips that show how the chainsaw is arranged and how it works:
From time to time, malfunctions occur in the saw, which requires disassembly. What can happen with such a simple mechanism as a chainsaw? At least the following:
- Ceases to start;
- Starts up, but soon stops;
- It ceases to function in the cut;
- Loses its power;
Most of the problems are associated with interruptions in the engine (fuel supply system, exhaust system, ignition, cylinder-piston part), or with malfunctions of other systems and components (clutch, chain brake, tire, lubrication system). Consider the most common breakdowns and methods for eliminating them.
A working chainsaw starts up with one jerk and does not fail to cut
Ignition System Check
The first thing to do when a chainsaw breaks down is to inspect the spark plug by disconnecting the wire and carefully twisting it with a special key.
Components of the ignition system of a chainsaw: 1. Flywheel with magnets, 2. Ignition module, 3. Spark plug, 4. High voltage wire
Unscrew the spark plug to check its condition.
Her appearance says a lot:
- Dry. Most likely, the fuel mixture does not get into the cylinder. It’s not the ignition system, so the candle is screwed back.
- Heavily splattered with fuel. The reason for the excess fuel mixture lies either in violation of the start rules, or in the incorrect carburetor adjustment. Wipe the candle thoroughly, shut off the fuel supply and turn on the starter to remove excess fuel and ventilate the combustion chamber. Then the candle is put in place and the mechanism is started again.
- It was covered with black soot. This may indicate the use of low-quality oil, an incorrectly adjusted carburetor, or an incorrectly calculated ratio of gasoline to oil. The candle should be washed, cleaned of carbon deposits with a sharp object (with an awl or a needle), wipe the electrodes with a skin and put in place.
When checking the candle, you need to pay attention to the gap between the electrodes: from 0.5 to 0.65 mm is considered normal. Damaged or worn gaskets must be replaced.
A large amount of black soot on the spark plug indicates engine malfunctions
For complete certainty, the presence of a spark should also be checked. To do this, put the ignition cable on the candle, connect the candle nut and cylinder with pliers, start the starter and watch for the appearance of a spark. If it is absent. The candle needs to be replaced. If the new candle also does not give out sparks. The problem is in the high-voltage wire or in the failure to connect to the candle.
Fuel system repair
Fuel may not enter the cylinder for the following reasons:
- Fuel filter contamination. Remove the fuel hose and check for fuel leaks. If the jet is weak, you may need to clean the filter. It is taken out through the filler hole of the fuel tank and cleaned, in case of severe contamination it is replaced with a new one. As a preventive measure, it is recommended to replace the fuel filter every three months.
- Clogged breather (holes in the fuel tank cap). Also check by disconnecting the hose, in case of blockage, clean with a needle.
- Lack or insufficient fuel. There may be several reasons for the malfunction. The first reason is clogged air filter. The air ceases to flow into the carburetor in the right amount, in this regard, due to too rich fuel mixture, the engine is disrupted. The contaminated filter is carefully removed, cleaned and washed in water, then dried and replaced.
Another reason is the incorrect carb adjustment. Adjustment is made by three screws.
Timely replacement of the fuel filter ensures full fuel supply
The fuel hose and choke drive must fit snugly against the fittings.
The throttle control lever cable must be in place
During operation, you must use the instructions, otherwise you can only make it worse.
And the last reason is a violation of the integrity of the membrane or clogging of the carburetor channels.
To repair the carburetor yourself, you need to get acquainted with all its details
All parts must be clean, dry and intact.
Dismantling and cleaning the silencer
If the engine works fine at low revs and starts to stall at high revs, the cause may be covered in a silencer spark arrestor, clogged with combustion products.
- Remove the muffler;
- Disassemble (there are non-separable models);
- Clean off deposits using detergents;
- Blow dry;
- Set in place.
Dry cleaning is unacceptable, as there are carcinogens in the tan, inhalation of which is hazardous to health. After removing the muffler, the outlet is closed with a clean rag.
Chainsaw malfunctions indicate possible muffler clogging
To prevent clogging of the muffler, it is necessary to monitor the composition of the fuel mixture. The amount of oil must not exceed the norms recommended by the manufacturer. Poor oil quality also negatively affects engine performance.
Assessment of the condition of the cylinder-piston group
Often the engine does not start or does not work at full strength due to low pressure in the cylinder. It can be caused by wear of the piston or cylinder, dropping of the piston rings, wear of the bearings. Partially consider the state of the cylinder-piston group (CPG) is possible by removing the muffler and looking into the opening.
A compressometer placed in the candle hole will help to measure the compression in the engine. According to the results of the measurement, you can also talk about the state of the CPG. Accurate data is obtained only after the complete disassembly of the mechanism. If the piston has chips or scratches, it must be replaced. The piston ring must be clean, without carbon deposits, and be exactly in place.
Wear on the piston and crank mechanism is a serious problem.
According to the results of measuring compression, you can judge the state of the parts of the CPG
Repair chain lubrication system
We will consider three main malfunctions:
- Oil leakage. Check whether the pipes are tightly connected to the pump fittings and if there are any cracks on them. Problem tubes are sealed or replaced.
- Inadequate oil intake. Most likely, the lubrication channels are clogged.
- Cracks in the oil pump housing. Part replacement required.
Here’s how to diagnose a lubrication system:
Chain brake adjustment
The chain brake often does not work due to clogged grease or sawdust brake tape and the space under the cover. All parts should be cleaned of blockages. Perhaps the tape has simply worn out, then it needs to be replaced.
The chain brake is restored by mechanical cleaning.
Some parts of the chainsaw wear out faster than others. These include the drive sprocket, tire, chain, anti-vibration elements. For quick replacement, it is best to always have spare parts at hand. Do not neglect the sharpening of the chain.
Repair of lawn mowers, both gasoline and electric, may be needed at the most unexpected moment. We will talk about the main breakdowns of home-made and proprietary equipment, tell you what to look for, and by what signs it is possible to recognize a malfunction.
Lilac. This is a deciduous shrub, about 2-8 m high. Common lilac and varieties grafted on a stock of the same species are planted to reduce the number of shoots so that the root neck is 3-4 cm above the soil level.
Lawn mower. A wonderful alternative to a manual braid, which facilitates and accelerates the mowing of grass in a variety of places, including those where a conventional braid simply does not turn around. But behind the comfort and convenience is a sophisticated modern mechanism that requires tireless attention and regular maintenance.
Regardless of the manufacturer, all units have a similar design. Therefore, repairing the Viking do-it-yourself mower is done similarly to repairing other brands: Husqvarna, Calm, Bosch, Gardena, Oleo-Mac. A self-made lawn mower will not be an exception, but repairing a breakdown requires basic knowledge. Consider the most common causes of engine failure, and do-it-yourself lawn mower repairs in the field.
Repair of mechanical parts for all types of lawn mowers
Regardless of the type of engine, the mechanical part of the scythe includes knives, a device for ejecting or storing grass, and a transmission mechanism. Most often, knives fail or the fishing line ends.
Cleaning the mechanical part of the Bosh 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 simple bending to the initial state. With severe wear, the cutting part can be sharpened. A do-it-yourself lawnmower made from a trimmer can fail for many reasons. Most often, this is an excess of the maximum allowable load on the torque and engine, since a knife is used instead of fishing line.
Restoring the trimmer gas handle
During inspection, check the condition of the grass feed duct into the container and clean it if necessary. Complex mechanical breakdowns require a sophisticated tool, special equipment, professional skills, and it is better to entrust professionals with troubleshooting.
DIY electric mower repair
Not only factory ones, but also homemade electric lawn mowers fail. The main reason for the motor to stop is loss of contact and lack of power at the motor terminals.
Drawing of an electric lawn mower with TBH 1650 as an example
Therefore, the first thing we check is the presence of voltage in the power outlet, the condition of the electrical cord and the absence of breakage. Then, if a commutator motor is used, it is necessary to check the condition of the brushes and replace them with strong wear. A manual mower with a collector motor is characterized by increased survivability, but requires regular brush replacement.
DIY electric mower engine repair
Asynchronous hand-held lawn mowers also have problems. Often the phase-shifting capacitor fails, but it is problematic to verify it in the field. An indirect sign of capacitor failure is:
- Jerking of the motor at the moment of power supply;
- Strong engine heating even at low load;
- Reduced speed;
- Characteristic buzz.
Electric do-it-yourself mower is made from improvised materials that may fail. If a malfunction is detected, in any case, you need to make sure that the voltage is applied to the motor terminals, and if not. Check the operation of the switch.
DIY Electric Lawn Mower
If there is voltage, a capacitor or brushes. In order, the most likely cause of breakage is a burned-out winding. In this case, the unit will have to be returned to the repair shop. Self-made electric lawn mowers most often have to be repaired independently, since all the nuances of its operation are not taken into account when assembling the device.
DIY electric mower repair
Repair of a lawn mower with a gasoline engine
In lawn mowers, gasoline two-stroke internal combustion engines are used. When deciding how to make a lawn mower with their own hands, they often use engines from other household devices. Chainsaws, compressors, motor plows and trimmers. The process of finding and fixing the problems of these engines is carried out according to one algorithm. Do-it-yourself gasoline mower repair starts with determining the cause of the failure.
General layout of a gas mower
The engine starts and runs normally, but the knives do not rotate
In this case, failure of the mechanical part is guaranteed or, as an option, its fastening to the motor shaft is destroyed.
Do-it-yourself mechanical breakdown and repair of the Viking lawn mower
Starts poorly, but works fine
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. Failure to adjust the idle system in the carburetor or improper fuel composition.
Detail drawing of a gas mower
To eliminate it, you should start with fuel, combine gasoline and oil of the right grades in the required proportion and pour this fuel into the tank instead of the old one. If it doesn’t help. Remove and disassemble the carburetor and adjust the idle system in accordance with the manufacturer’s instructions.
The engine starts poorly and is unstable in all modes
The most probable reasons: fuel nozzles clogged, fuel filter clogged, air filter clogged. To eliminate: the nozzles are blown with compressed air, the filters are changed or washed, depending on their design.
Bosh Lawn Mower Engine Repair
The engine starts, but does not hold the load
If the engine starts and runs at idle, but poorly holds the load during operation. Most likely takes place “oxygen starvation”. Do-it-yourself repair of lawn mowers is done by replacing or cleaning “purge method” air filter.
Lawn mower repair if engine fails to start
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, during visual inspection, all electrical circuits are in order, then this coil will need to be replaced.
Do-it-yourself lawnmower engine repair
Less common case. Heavy soot or spark plug failure. It is determined by visual inspection of the twisted out candle. The most effective way to identify this malfunction. Replace the candle with another, obviously working. When thinking about how to make a lawn mower if the engine does not start, pay attention to replacing candles with new ones, and preferably more reliable ones.
How to make a do-it-yourself lawn mower
Given the feature “field conditions”, in which lawn mowers are operated, the manufacturers of these devices have tried to protect their consumers from possible problems. But, as you know, even a manual mechanical lawnmower, made with your own hands, can one day fail. We really hope that our advice will help you in this case and will direct the troubleshooting in the right direction.