空气滤清器上勿钻孔目前有不少小型拖拉机的空气滤清器壳体上钻有一个８～１０ｍｍ大小的孔，司机说：“这样冬季起动方便。”冬季天冷，发动机不好起动，于是起动时便在小孔处引火起动。殊不知，这种做法错之又错，其一，在空气滤清器壳体上钻孔直接破坏了空气滤清器内部... Do not drill the air filter At present there are many small tractors air filter shell drilling a hole size of 8 ~ 10mm, the driver said: “This winter easy to start.” The winter cold weather, the engine is not good start , So start firing in the hole at the start. As everyone knows, this approach is wrong and wrong, one is, in the air filter casing bore directly destroyed the interior of the air filter ...