小型汽油机(40,45型)的技术状态,可利用火花塞裙部电极颜色来判断。(1)在小型汽油机的维修保养中,拆下火花塞,观看裙部电极颜色,如果电极呈棕色,则说明汽油机工作正常,技术状态良好。(2)如果拆下火花塞,观看裙部侧电极呈白色或灰白色,中心电极上有干的白色碳粒,则说明汽油机有“贫油”现象,即混合气过稀。同时汽油机在工作中会出现过热的情况。手油门加大,汽油机转速提不高或反而降低 Small gasoline engine (40,45 type) technical state, the spark plug skirt electrode color can be used to judge. (1) In the maintenance of small gasoline engine, remove the spark plug, watch the color of the skirt electrode, if the electrode is brown, then the gasoline engine is working properly, the technical condition is good. (2) If you remove the spark plug, watch the skirt side electrode was white or gray, the center electrode has a dry white carbon, then the gasoline engine has a “lean” phenomenon, that is, the mixture is too thin. At the same time gasoline engine will appear in the work of overheating. Hand throttle increased, gasoline engine speed is not raised or reduced