GW250 cold car throttle ring.

1. Throttle has too much carbon deposit. You can clean the throttle from time to time and clean up the carbon deposit.

2. The problem of oil pressure and abnormal sound caused by low oil pressure need to be checked.

3. For the problem of spark plug or live wire coil, it is suggested to replace the spark plug directly.

4. Consider the problem of valve clearance.

5. The quality of engine oil is not good, and the engine oil is too thin, resulting in abnormal noise. It is recommended to replace the oil with proper viscosity and the old oil.