The fuel mixture is too rich and the engine oil is leaking.
1. The combustible mixture is too rich: the remaining unburned portion will accumulate on the spark plug electrode and become charred. The fuel mixture is too rich, which will cause the spark plug to flash abnormally until it is damaged. carbonization.
2. Engine oil leak: During engine operation, if blue or black smoke is emitted from the exhaust pipe, it indicates that the engine oil is leaking, causing a large amount of carbon deposits on the spark plug. ignition. electrode, or become wet with engine oil and unable to pull.
New machine:
1. Disconnect the oil pipe from the carburetor to see if the oil is flowing properly and increase the idle speed slightly.
2. If there is no problem with the oil, check to see if the spark plug is burning.
3. If there is oil or fire and there is no lighterage, check forward and reverse rotation. (Press in the direction of the handle to rotate forward)
4. Then check if the air door is closed normally.
5. Check if the voltage is too high. The 60 volt protection voltage is 68 volts, and the 72 volt protection voltage is 80 volts.
6. The carburetor should be cleaned after leaving it too long. Before use, add 5 ml of engine oil and read the instructions carefully.
Old machine:
1. Unscrew the spark plug and determine if there is a fire and carbon deposits.
2. Dry the spark plug and install it, start the range extender, and if it still catches fire, remove the spark plug and see if there is any oil on the spark plug. Otherwise, clean the carburetor. or replace the carburetor and clean it. Finish blowing with an air gun.
3. Open the air filter cover and check if the inAir door switch is normal.
Recommendations for using the range extender:
It is not recommended to start the range extender when the battery is full. It is generally recommended to start the range extender when the battery is only charged. 30%-40%. There is no particularly good effect when starting when the battery is full. To protect the environment, it is recommended to start the range extender when necessary. Battery pollution is more serious than exhaust pollution. It is not recommended to use it when the battery is low. The range extender starts electrically. It may not start when the battery is low.