58CC 2.4KW Gasoline Hand Chain Saw

1. The carburetor is a key component in the engine, and even minor changes can affect the overall performance of the vehicle. Therefore, during the disassembly and assembly process of the carburetor, appropriate tools should be used and the force should be moderate to prevent deformation of the parts. The disassembled parts should be arranged neatly in order to prevent missing or incorrect installation during assembly.

2. The cleaning of carburetors should be carried out in a clean area. Firstly, clean the outer surface of the carburetor. The cleaning of internal parts can be done using carburetor specific cleaning agents or industrial gasoline. In addition to impurities, pay attention to cleaning the gasoline gum on the surface of the parts. The cleaned parts should be blown clean with compressed air and should not be wiped with cloth or paper that may produce burrs to prevent further contamination. Blocked small holes should not be punctured by hard objects such as steel wires to prevent changes in the aperture from causing changes in the performance of the carburetor. They should be cleaned with gasoline or compressed air.

3. During the assembly process of the carburetor, the connecting screws between the float chamber and the carburetor and engine should not be tightened at once. They must be tightened in several stages, with a general tightening torque between 12N. m and 15N. m. Otherwise, it will cause deformation of the joint surface and result in air or oil leakage. The tightening torque of measuring hole parts is generally between 1.5N. m and 3.0N. m. Excessive tightening torque can damage the threads, cause deformation of the parts, and even produce metal chips, causing secondary pollution and affecting the performance of the carburetor.

4. During the cleaning process of the carburetor, if a large amount of sediment is found in the float chamber of the carburetor, it is often caused by the failure of the gasoline filter. At this time, it is necessary to inspect the gasoline filter. If it is confirmed that it is ineffective, it needs to be cleaned or replaced with a new gasoline filter.

5. If not used for a long time, it is necessary to drain the fuel inside the carburetor float chamber to prevent the deposition and condensation of gasoline gum, which may cause carburetor malfunction. Additionally, it should be emphasized that the position of the idle air adjustment screw has a significant impact on motorcycle emissions, idle speed, transition, fuel consumption, and other performance factors. Therefore, it is generally prohibited to rotate the idle air adjustment screw during carburetor cleaning. If it is necessary to disassemble the idle air adjustment screw, first tighten the adjustment screw to the bottom, remember the number of turns (accurate to 1/8 of a turn), and return to the original number of turns during assembly.