{HEAD ~ electronic means} suitable for causing {TAIL ~ the spark} in the spark plug in each cylinder whose piston is located near a top dead centre as identified by a sensor placed on a crank shaft 
{ HEAD ~ electronic means } suitable for causing { TAIL ~ the spark } in the spark plug in each cylinder whose piston is located near a top dead centre as identified by a sensor placed on a crank shaft
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH