... 1.Small spark,saf BOSCH 91114 BSX 180-181 2-BS 180-181 ,dynastart carbon brush,starter carbon ... never appears scratch, rough, ablation and so on. (2) With a good flow properties and set to change ... original manufacturer's specification. Any more than a 2 degree variation in the setting can cause arcing, ... size of opening. BOSCH 91114 BSX 180-181 2-BS 180-181, dynastart carbon brush,starter carbon ...