1. The combustible mixture is too rich. The remaining unburned parts will accumulate on the spark plug electrode and be carbonized, causing the spark plug to flash abnormally until it is damaged by carbonization. The reasons for the fuel mixture being too rich are usually that the carburetor oil level is too high, the carburetor main air volume hole is clogged, and the air filter element is seriously clogged. Additionally, the carburetor choke is blocked and cannot be fully opened, or the enrichment valve is not working properly, which is also the reason why the fuel mixture is too rich.
2. Engine oil leak. During engine operation, if blue or black smoke is emitted from the exhaust pipe, this indicates that excess engine oil has entered the cylinder, which will cause the productionfrom a large amount of carbon deposits by the spark plug electrode or its moistening. by engine oil and unable to produce sparks. This phenomenon is commonly referred to as engine oil channeling. For two-stroke engines, check whether the oil volume of the oil pump is too large and whether the rod sleeve seal and check valve are defective. For four-stroke engines, check the piston rings on the piston, especially the oil ring, whether it is worn or not. Then remove the intake valve and check for carbon and wet grease deposits on its head and back. If the valve and valve guide are severely worn, the valve guide seal is hardened, or the seal lip is excessively worn, the mounting gap will be too large and the effect of The seal will be lost. Both of these abnormal situations will eventually cause oil to be sucked intothe valve rocker arm chamber into the cylinder along the valve stem during intake air summing, causing oil combustion. In this regard, the valve guide, oil seal or valve must be replaced respectively depending on their wear.
3. In the ignition system, the magneto is demagnetized, the wire connections inside the ignition coil and the electronic ignition, the generator output end and the coil input end are demagnetized. The ignition is loose and the ignition timing is incorrect. If the ignition performance is not improved and the ignition performance is poor, it will directly cause carbon deposits on the spark plug electrode.
4. Pay attention that the spark plug model and calorific value comply with the instructions for use. If the selected calorific value is lower by one or two rinputs to that specified in the instruction manual, the temperature of the spark plug will rise very high and the heat cannot be dissipated in time, causing abnormal combustion and possibly melting of the spark plug electrode. ignition. and cause premature damage. When the spark plug itself is installed and used, some defects are not easy to detect and also affect the ignition performance. For example, if the spark plug is poorly sealed, if the spark plug is not firmly fixed, if the spark plug insulator is cracked, etc., it should be adjusted or replaced in time . 5. If the crankcase oil is overfilled and the breather pipe is blocked, the pressure in the crankcase will increase and the crankcase will not be balanced.
How to remove the center screws of the Fengxing Lingzhi generator
1. The motor has an abnormal noise
Symptom description: possible abnormal noisermal in the engine compartment. is relatively high. Most people judge abnormal noise in the engine compartment based on the source of the sound, which is usually a metallic screech or wind whistle.
Solution: Abnormal engine noise indicates that the technical condition of a certain engine mechanism has changed. This is mainly due to excessive wear of certain parts or poor assembly and adjustment. Some abnormal noises can predict possible accidental damage to the motor. Therefore, when the motor makes abnormal noise, it should be repaired in time to prevent the fault from spreading.
It is worth remembering that if there is an abnormal noise in the engine, the car owner is unlikely to be able to solve it himself and it is better to send it to the factory for maintenance.
2. There is an abnormal noise in the gearbox
Symptom description: If there is a noiset "rustling" sound inside the gearbox while the car is driving, but it disappears after pressing the clutch or accelerator, replace it. You will hear a whistling sound when changing gears.
Solution: There are many parts in the transmission, and the causes of noise are more complicated when analyzing and judging, you should pay attention to: s 'it is linked to. a specific speed, like certain planetary teeth that make noise. It's more obvious around 50Km/h. Whether this is related to certain gears is very important in judging transmission failure. If a certain gear is making noise, it must be related to the components that affect the transmission of that gear. If all the gears make noise, it is often a fault in the gear. constant mesh driveshaft or faulty transmission. Whether specific actions, such as shifting into a gearupshift, downshift, start-up, rapid acceleration, rapid deceleration, turning, etc. are all effective ways to determine abnormal noise. Among them, the change of speed and direction is particularly important in determining the rear axle. failure.
If the transmission makes obvious abnormal noise, it is recommended to send it to a professional repair shop to check the defective parts and then replace them.
3. There are abnormal noises in the car door
Explanation of symptoms: When driving, there are always abnormal noises from certain parts of the car body when you step on the accelerator or brake. .The sound is not loud and does not affect normal operation, but there is always a little worry that something is wrong.
Solution:
Abnormal noise in the car door is mainment caused by a lack of lubrication, but it is necessary to determine whether it is the position of the door hinges. or the window regulator and door lock inside the door. Mechanisms, handle mechanisms, etc. If it is a door hinge or limiter, you can use special grease for door hinges and runners, as well as special grease for door accessories to lubricate the window regulator, the door lock mechanism, handle mechanism, etc. inside the door. In terms of brand selection, try to choose brands commonly used in 4S stores, such as Kluber, HOTOLUBE, Volkswagen, etc. It is not recommended to use motor oil or regular butter, as they will freeze in winter and their noxious smell will affect your health.
1. Firstly, the low strength screw glue can be dismantled with a wrench. After disassembly, clean the remaining glue withalcohol, then apply glue again.
2. Second, for medium and high strength screw glue, medium strength screw glue can be dismantled by destroying the glue layer with torque. High-strength screw glue is not easy to disassemble. and can be disassembled by heating.
3. Finally, high-strength screw glue is difficult to disassemble. You can use a hot blower to slowly take it apart while heating and rotating.