Home > Knowledge > Content

What about the smoke from the saw

- May 26, 2018 -

What about the smoke from the saw
改CS5800-优点.jpg

When the gasoline engine of the chain saw works, the gasoline burns in the cylinder and the exhaust gas is discharged out of the machine through the exhaust pipe.
Normal exhaust is invisible to the naked eye.
When the incomplete combustion of fuel, or the engine work is not normal, can have hydrocarbon compounds in waste gas, carbon monoxide, nitrogen oxides, and carbon particles, such as waste gas will present abnormal white, black or blue.
We can judge the burning condition of gasoline according to the color of engine exhaust, and take the corresponding troubleshooting measures.

When the gasoline engine is working, the gasoline burns in the cylinder and the exhaust gas is discharged out of the machine through the exhaust pipe.
The waste gases are mainly water vapor, carbon dioxide and nitrogen gas.
Normal exhaust is invisible to the naked eye.

When the incomplete combustion of fuel, or the engine work is not normal, exhaust will be hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx) and carbon particles, such as waste gas will present abnormal white, black or blue.

DSC_7637.JPGWe can judge the burning condition of gasoline according to the color of engine exhaust, and take the corresponding troubleshooting measures.

1. White smoke

The white smoke in the exhaust is mainly the fuel particles or water vapor that have not been fully atomized and burned. Therefore, if the fuel oil cannot be fully atomized or water enters the cylinder, the exhaust will emit white smoke.

Chain saw gasoline engine white smoke mainly for the following reasons:

1. Low temperature, insufficient cylinder pressure, poor fuel atomization, especially white smoke emission in the early cold start;

2. Silencer inlet water;

3. High water content in fuel oil.

Chain saw white smoke coming when the cold start exhaust, white smoke disappear after engine warming-up shall be regarded as normal, if engine chain saw white smoke while running for the fault, should be replaced by cleaning the water in the muffler, fuel and other ways to troubleshoot.


2. Blue smoke

The blue smoke in the exhaust is mainly the result of excessive oil injection into the combustion chamber.
Therefore, any cause that causes oil to enter the combustion chamber will cause the exhaust to emit blue smoke.

The blue smoke of chain saw engine is mainly caused by the following reasons:

1. Piston ring wear, piston ring breaking, piston ring opening turning together, etc.

2. Improper assembly or aging failure of valve oil seal and loss of sealing effect;

3. Valve conduit wear;

4. Severe wear on piston and cylinder wall;

5. The engine is mounted on the side or upside down;

6. Blocked breathing apparatus;

7. The oil plate number is wrong;

8. Too much oil is added.

If engine fault of blue smoke coming in, the first thing to check is: chain saw oil have add too full, next, typically through teardown check, in order to find out causes and troubleshooting solutions were determined.


3. Smoke black

If the saw's exhaust pipe is black, it's because the gas isn't fully burned and the engine exhaust contains black carbon particles.

Full combustion of gasoline requires a certain ratio of gasoline and air in the combustion chamber. If the ratio of air in the combustion chamber is too low and gasoline is too high, the engine will emit black smoke.
Therefore, the black smoke of small chain saw gasoline engine is mainly caused by the following reasons:

1. Main nozzle of carburetor is worn;

2. The air filter is damped or blocked by a large amount of dust, and the air inlet resistance is too large, so that the air inlet is insufficient;

3. Overload operation of the engine;

Choose the wrong 4, carburetor main nozzle, such as when the engine used at high altitudes, due to oxygen in the atmosphere is reduced, should choose the main nozzle, high altitude dedicated otherwise it will lead to smoke.

The black smoke gasoline engine can be checked and eliminated by replacing the empty filter element, changing the main nozzle, and confirming whether the engine is overloaded.

From the above analysis, I think you should know how to deal with the situation of saw smoke. If you cannot repair yourself, you must send it to the professional maintenance department for repair.


Quote from:http://sh.qihoo.com/

Related Industry Knowledge

Related Products

  • Professional Quality 7 In 1 Grass Cutter
  • 58cc 22 Inch Steel Chainsaw
  • Petrol Chainsaw Outdoor Garden Yard Use
  • Professional 20 Inch Petrol Chainsaw
  • Professional Petrol Brush Cutter
  • Homemade Petrol Oregon Chainsaw