We usually use these tools at the time, many units in order to save operating costs will choose inferior oil and gasoline. In fact, this view is wrong. When we choose the fuel, we must choose the high purity, and is a lead-free fuel. If we choose the fuel is very poor quality, then it will likely damage the engine. The choice of inferior gasoline, although to a certain extent the above cost savings, but it will seriously damage the engine, the result is worth the candle. Second, for gearboxes in garden tools, such as gears and chains, we should check the chain before each use to see if it is lubricated. If the lack of oil, we should promptly replenish the oil. For the blade, we should also timely application of lubricating oil.