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