1. Avoid overloading operation and stop and rest, minimize engine idling time.
2. Ignition advance angle should be adjusted, do not make it too small.
3. According to the proportion of fuel injection, do not make gasoline engine oil too small.
4. Do not use an explosion-proof industrial cleaning gasoline.
5. Adjust the carburetor and fuel ratio, do not make the mixture too thick or too dilute.
6. Clean the heat sink or remove the charcoal.