You will need
- - screwdriver with flat and Phillips blade;
- - wrench set;
- - cleaning compositions, lint-free cloth;
- - ultrasonic cavitation bath
Before proceeding, drain the fuel from the gas tank. Unscrew the mounting screws on the top cover of the chainsaw and remove it. Remove the air filter housing, the filter element and remove the housing by removing the nuts. Often, in addition to the screws, the casing is held with clamps. Otdelnie them by clicking the appropriate tabs. On the right side of the carband remove the fuel hose and pull the air damper. Unscrewing the mounting screws and nuts on the body of the carband remove it and remove the cable terminal from the lever throttle.
On the left side pull the fuel hose from its fitting. Remove the screw of adjustment of idling speed and the fixing screw top cover carb. Remove the top cover and find the fuel diaphragm fuel pump having a blue transparent strip. On the left side of the case you find the screws with spring clips. After removing the bracket, Unscrew the screws. Record label or remember their installation locations to avoid confusion during Assembly.
Unscrew the screws on the bottom cover of the carband remove this cover. Remove the node of the needle valve by removing the screw. Be careful – under duplechin lever valve actuator is installed spring. Unscrewing the screw of the air shutter, remove it. Then remove the axle of this valve, by applying force along it. Hole axis of the air vent cover in advance with your finger, in order not to lose the spring loaded ball in it.
Remove the throttle valve by loosening the screw of its fastening. Then remove the lever of an actuator and a spring washer-stopper. Please note: the screws securing the throttle interchangeable and the screw of fastening of the lever of an actuator is very similar but has a different length. Don't mix up the screws when assembling. In conclusion, remove the throttle shaft, noting its correct position.
Lay on the table all the details of the carband inspect them with the purpose of Troubleshooting. Worn parts and damaged gaskets replace the new. All parts are thoroughly rinse with the use of specialized detergents and dry with a lint-free cloth. The nozzles and tubes dry with compressed air. For easy purge use manual or foot-operated air pump.
With the purpose of increase of efficiency of cleaning of the parts in the carband use an ultrasonic bath, for cleaning using the cavitation effect. To do this, fill it with gasoline or diesel fuel, put in it all the necessary elements of the carband and turn for 2-3 period of 5 minutes each. At the end of the process blow the parts with compressed air.
Advice 2: How to adjust the carburetor of a chainsaw
For a flawless and long-term operation of a chainsaw is required to periodically adjust the carburetor. This should be done taking into account the specific brand of your device, and standard parameters specified in the technical manual supplied with the saw. The correct adjustment of the carburetor will depend on the efficiency of the entire technical system.
You will need
- - the manual of a chainsaw;
- - tachometer;
- - screwdriver.
Check device chainsawset forth in technical documentation for it. Determine the location of the jets of the carb and the adjustment screws. The standard carb has usually two or three screw controls the fuel mixture adjustment screw idle speed, and screws the jets high and low speed.
To adjust high and low engine speed saw, use the appropriate screws. They regulate the ratio of fuel and air that is determined by the degree of throttle opening. For the lean mixture screw in the corresponding screw clockwise. If necessary, increase the engine speed (i.e. richer mixture), remove the screw by rotating it counterclockwise.
Adjustment of idling speed is also carried out by rotating the right screw. Turn the knob in the direction of clockwise to increase the frequency of idling. To reduce engine speed slowly turn the screw in the opposite direction.
When adjusting the carburetor , keep in mind that the initial stage of operation of a chainsaw is necessary to keep the factory settings. Exposed the factory settings are calculated for a richer mixture. After hours of work the saw can begin to self-adjust the carb.
Run the saw at full speed for 10-20 seconds. Then, Unscrew the needle valve the high speed counterclockwise. Ten seconds with a tachometer check the maximum engine speed and contrast the findings with those specified in the technical passport of the device. Too lean makes the saw "scream"; the excessive enrichment of the mixture of smoke from the muffler.
Observe when you change settings caution since a sharp change in the number of high speed greatly affects the power device and the rotation speed of the circuit. The depletion of hot mix leads to unnecessary, excessive rpm, which can lead to damage to the chainsaw down.
Advice 3: How to adjust the carburetor in eye
After prolonged operation of the vehicle, many parts wear out. With them quality suffers the carband then at idle it may stall. This means that it's time to adjust.
You will need
- - screwdriver;
Install the crankshaft minimum rotational speed. To set the maximum speed of the screw of quality of a mix, need to turn it in different directions, but not to change the location of the throttle.
Warm up the car engine, as only under such conditions can make the carb adjustment. Then, using the first screw to limit closing of the throttle columns. This will help to fix the position of the open damper of the car in the right (primary) chamber of the carburetor. The second screw adjust the quality of the fuel mixture. This means that unscrewing it, you thereby increase in vapor fuel system maintenance gasoline and get rich. If you're spinning it inside the mixture will impoverish.
Don't forget to turn to failure of the screw of quality of a mix and the screw of quantity of a mixture screw two turns.
Proceed directly to the carb adjustment to ensure stable operation of the engine, "Oki" at idle. Do it only after the handle located at the bottom of the carb screws. Find the location of the adjustment screws, which is correct (will provide the necessary quality and quantity of the mixture). Smooth and economical operation will be achieved exactly at the same position.
Turn the first screw to the left, and then right below the rotational speed of a crankshaft of the engine was set to minimum speed. Do the same with the second screw to set the maximum engine speed.
Complete carb adjustment "Oki" in the following way. The first screw is set to the rotational speed of 600-700 rpm, and pedal, increase them to 4000. After this action the engine should run well at idle.
Be sure to observe the operating instructions not to aggravate the condition of your carburetor.
Advice 4: How to build a gasoline for chainsaws
In most cases, the chainsaw is an ordinary chain saw equipped with a two-stroke engine. It works on a special mixture of gasoline and oil, and added to the engine. Should elaborate on the question how to breed fuel mixture for chainsaw.
How to breed fuel mixture for chainsaw? Materials for cooking
First you need to prepare everything necessary, namely, gasoline and oil. Gasoline it is recommended to purchase AI-92 or AI-95. Other types with the lowest octane number you should use. Complete with a chainsaw, there are special synthetic engine oil designed specifically for two-stroke engine. Attention! Not as an alternative to gasoline diluted oil intended for four-stroke engines, and oils, designed for boat motors!
Official producer of a particular brand of chainsaws offers a number of versatile additives to its fuel mix, which helps improve the performance of two-stroke engine. It is recommended not to neglect this issue.
In addition to gasoline and motor oil need and a clean, dry container. Do not neglect this advice: capacity must be dry mandatory, as drops of water and any foreign objects can significantly harm the heart of a chainsaw – its engine!
How to breed fuel mixture for chainsaw? Usage instructions
If all that is necessary for preparation of the fuel mixture, is at hand, we can proceed to action. So, the standard ratio of gasoline to oil is considered to be the following: 1 to 40 or 1 to 50. It should be noted that these figures are a manufacturer of chainsaws can vary, so be sure to, it is recommended to know your own ratio, which is indicated on the Bank with the engine oil that comes with the chainsaw.
Don't be carried away by adding oil into fuel! The fact that the excessive addition of synthetic oil into the gasoline used for the two-stroke engine of a chainsaw, increase its opacity. This, in turn, will lead to plug fouling and the entire piston group of the engine. In this case, breakage of a chainsaw cannot be avoided. To avoid this, it is necessary to carefully and accurately monitor the amount added to gasoline oil.
Manufacturers of modern chainsaws recommend that all owners of this tool to get a special chain oil. The fact that its use will reduce the amount of consumed fuel mixture.
If for some reason engine oil has been added more than the norm, it is recommended to increase the amount of gasoline in proportion to the number already added oil. You should watch and due to lack of oil in the fuel: if it was added below the norm, on the pistons of the engine will begin to appear a bully.
As soon as engine oil and gasoline will be added in the required amount in a single and dry (!) capacity, it must close tight lid, and then carefully mix all the ingredients. It is not necessary to prepare a large quantity of the fuel mixture for chainsaw, since the shelf life should not exceed one month. If the fuel mixture will be stored for more than month, then to avoid its oxidation and loss of all lubricating properties. In addition, can not be avoided and damage to the chainsaw.