1.首先檢查轉子。用手轉動轉子軸，在磁極換向時，先是手感像壓縮彈簧一樣阻力逐漸增大，至中立點后又會突然自行旋轉，但整周轉動過程中應無摩擦卡滯感。如有，就可能是軸承過度磨損或已損毀，造成定子和轉子相互刮擦。
2.驗看觸點狀況。以手或工具扳開兩觸點觀察，如有附著污物應加以清洗。如有輕微燒蝕，可用“0”號砂紙條對折，使兩砂面向外，夾在觸點間來回抽動磨光。如嚴重燒蝕，就應卸下觸點，用油石磨光后裝復，或干脆更換新件。
3.電容器狀況。此電容損壞率并不高，如確需檢查，可御下，以萬用表高阻擋位反復接觸外殼和中心電極，如每次表針均擺回“0”，即表明該電容基本正常。需要注意的是，電容外殼與夾持板及底座常由于臟污生銹而接觸不良，造成火花塞跳火微弱。
4.正確調(diao)(diao)整(zheng)。一(yi)般使用說明書上(shang)均有(you)調(diao)(diao)整(zheng)觸(chu)(chu)點(dian)(dian)大(da)間(jian)隙(xi)0.3mm。對(dui)于觸(chu)(chu)點(dian)(dian)安裝底(di)(di)板(ban)(ban)已經拆卸過而又安裝不當的(de)磁電機(ji)，僅調(diao)(diao)整(zheng)觸(chu)(chu)點(dian)(dian)間(jian)隙(xi)是不行的(de)。這是因(yin)為(wei)磁電機(ji)點(dian)(dian)火(huo)的(de)初級(ji)電流(liu)，不同于汽車用蓄(xu)電池(chi)點(dian)(dian)火(huo)線(xian)(xian)(xian)(xian)圈存(cun)在恒(heng)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)的(de)蓄(xu)電池(chi)電壓(ya)供應，只有(you)磁電機(ji)轉(zhuan)子(zi)磁極(ji)與(yu)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)子(zi)極(ji)掌處于極(ji)性交換過渡的(de)某一(yi)特(te)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)位(wei)置時，才會(hui)感生出大(da)的(de)電流(liu)，也(ye)只有(you)此時斷(duan)電器(qi)斷(duan)開(kai)(kai)(kai)(kai)，次級(ji)線(xian)(xian)(xian)(xian)圈才會(hui)感生出的(de)跳(tiao)火(huo)電壓(ya)。為(wei)保證此種關系(xi)，觸(chu)(chu)點(dian)(dian)安裝底(di)(di)板(ban)(ban)下方與(yu)殼體(ti)間(jian)有(you)刻(ke)線(xian)(xian)(xian)(xian)標識(shi)。但遇到下述情況時刻(ke)線(xian)(xian)(xian)(xian)位(wei)置是無法確定(ding)(ding)(ding)(ding)(ding)(ding)(ding)的(de)：底(di)(di)板(ban)(ban)刻(ke)線(xian)(xian)(xian)(xian)不清，底(di)(di)板(ban)(ban)與(yu)殼體(ti)并(bing)(bing)非原裝，交換底(di)(di)板(ban)(ban)進行左旋(xuan)和右旋(xuan)磁電機(ji)的(de)改型。采用下述方法可(ke)大(da)致(zhi)確定(ding)(ding)(ding)(ding)(ding)(ding)(ding)上(shang)述極(ji)性交換過渡的(de)某一(yi)特(te)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)位(wei)置：先(xian)將(jiang)兩個底(di)(di)板(ban)(ban)固(gu)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)螺釘(ding)稍(shao)加松(song)退，再轉(zhuan)動(dong)偏心(xin)調(diao)(diao)整(zheng)螺釘(ding)于中(zhong)位(wei)，用手緩慢旋(xuan)動(dong)轉(zhuan)子(zi)，并(bing)(bing)觀察軸頭斷(duan)電凸(tu)輪在快要(yao)頂(ding)起動(dong)觸(chu)(chu)點(dian)(dian)時，以(yi)手感確定(ding)(ding)(ding)(ding)(ding)(ding)(ding)磁力由(you)阻力變(bian)為(wei)引力的(de)交變(bian)點(dian)(dian)并(bing)(bing)嚴格固(gu)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)。此時觀察兩觸(chu)(chu)點(dian)(dian)，如(ru)剛好微開(kai)(kai)(kai)(kai)，便可(ke)把兩底(di)(di)板(ban)(ban)固(gu)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)螺釘(ding)緊固(gu)，如(ru)兩觸(chu)(chu)點(dian)(dian)未開(kai)(kai)(kai)(kai)或開(kai)(kai)(kai)(kai)得(de)過大(da)，可(ke)將(jiang)底(di)(di)板(ban)(ban)稍(shao)作(zuo)轉(zhuan)動(dong)，使觸(chu)(chu)點(dian)(dian)剛好微開(kai)(kai)(kai)(kai)后(hou)再緊固(gu)。后(hou)驗看大(da)開(kai)(kai)(kai)(kai)度是否符合規定(ding)(ding)(ding)(ding)(ding)(ding)(ding)，如(ru)相(xiang)差過大(da)，可(ke)對(dui)偏心(xin)螺釘(ding)稍(shao)加調(diao)(diao)整(zheng)后(hou)，再重(zhong)復上(shang)述觸(chu)(chu)點(dian)(dian)開(kai)(kai)(kai)(kai)啟時間(jian)的(de)調(diao)(diao)整(zheng)，就會(hui)獲得(de)滿意(yi)的(de)效果，即用高壓(ya)線(xian)(xian)(xian)(xian)對(dui)機(ji)殼作(zuo)手轉(zhuan)動(dong)打火(huo)試驗，打火(huo)的(de)距離一(yi)般在7mm以(yi)上(shang)。