Required tools:
- spark plug wrench;
- Phillips screwdriver;
- match;
- thin tube or hose.
How to disassemble a carburetor and which valve to clean
If the brush cutter engine refuses to start, then first of all you need to check the spark plug. If it is completely dry, this means that fuel is not supplied to the combustion chamber and the reason is in the carburetor. You should immediately check the spark plug for a spark in order to rule it out as a cause on all fronts.
You can also make sure the motor itself is working properly. To do this, unscrew the spark plug and pour a few milliliters of gasoline into the combustion chamber with a syringe. After this, the spark plug is screwed in and the lawn mower starts. If everything is fine with the motor, it will start working for a few seconds. This will once again confirm that it makes sense to disassemble the carburetor.
Next, remove the plastic protective cover along with the air filter. After this, use a Phillips screwdriver to unscrew the 2 screws holding the air damper and carburetor to the engine. The fuel pipes immediately break off.
The carburetor is removed and turned over.
From the side of the choke cap you need to unscrew 4 screws with a screwdriver and divide it into 2 halves. We are interested in the half with suction. There is a valve on the inside of it in the center.
It often sticks because after the gasoline evaporates when it is idle, a viscous oil remains on it, acting like glue. To check it, you need to put a short thin tube and try to blow air through it. If it is stuck, it will not be able to blow in any direction.
Sticking of the valve can be eliminated with a regular match. It is better not to use toothpicks, as they are sharp and can cause harm. You need to lightly press the match against the valve and stir it. After cleaning with a match, it will be purged.
After removing the blockage, you can reassemble the carburetor and install it on the lawn mower.
The fuel will already be able to flow, so it will work. Cleaning the valve is not a panacea for all lawn mowers that do not start after being idle, but it helps in 8 cases out of 10. The remaining 20%, as a rule, is also associated with the carburetor, usually with a needle.
