推荐回答（3个）
踏板车化油器的混合气调整螺丝在化油器的右侧（也就是车子的右侧）靠后下边 在车上调节的话很不方便 要适当把化油器卡箍松动 把化油器向左边倾斜 用很短的一字起子才可以调整 一般是先把螺丝旋到底 再退出来三圈半
但是 据经验 混合气很浓的话 单靠调整混合气螺丝往往不起作用 最好是把化油器顶部的盖子打开 取出大弹簧 拉出和橡胶膜片连在一起的柱塞 用小起子旋出柱塞里固定油针的卡片 取出油针 把油针上面的卡箍取下 向上移动一个卡槽 安装 试验 如果急加油看不到排气筒冒黑烟 就说明混合气不浓了 如果还是不行 就分解化油器 调低油平面（这个需要一定的专业知识 最好请个师傅来做）中速骑行一段路程 旋下火花塞 如果发现电极颜色呈砖红色 即表明混合气浓度适中 燃烧良好 也一定省油 如果发白 就是混合气偏稀 会导致冷车不好来车或者机器高温 如果发黑 那就是偏浓 会冒黑烟 油耗增加 偏浓偏稀都不好 要仔细耐心继续调整
理论上应该是 你的应该是混合比太浓 汽缸碳化严重 在化油器上调 有一个调节螺钉 调稀后应该有好转 但碳化的原因有很多 你先试试 不行了在看看是不是别的原因
作用不大，油针磨损的可能性比较高，气门漏气也黑。
节气阀边上那个铜螺丝就是。
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