1. The running-in period of the newly-produced machinery is from the beginning of use until the third oil filling period. Do not let the engine run at high speed without load during use, so as not to bring extra burden to the engine during the running-in period.

2. After long-term full-load operation during the working period, let the engine do a short period of idling, let the cooling air flow take away most of the heat, so that the driving device components (ignition device, carburetor) will not have adverse consequences due to heat accumulation.

3. Maintenance of air filter. Adjust the damper to the choke position to prevent dirt from entering the intake pipe. Wash the foam filter in a clean, non-flammable cleaning solution (such as hot soapy water) and dry. Replace the felt filter. When it is not too dirty, you can tap or blow it lightly, but the felt filter cannot be cleaned. Damaged filter elements must be replaced.

4. Inspection of spark plugs. If the engine power is insufficient, difficult to start or idling failure, first check the spark plug. Clean the contaminated spark plug, check the electrode distance, the correct distance is 0.3mm, adjust if necessary. To avoid sparks and fire hazard, be sure to screw the nut onto the threads and tighten, pressing the spark plug plug firmly against the spark plug.