Champion 861ECO/5861 Spark Plug, 0.022 to 0.028 in Fill Gap, 0.551 in Thread, 0.819 in Hex

Fine wire center and side electrodes concentrates spark energy for easier starts under all conditions. Booster gap delivers maximum firing voltage. Projected core nose offers peak performance. #5843 is equivalent to #CJ8, CJ7Y, CJ8Y, RCJ8, RCJ7Y, RCJ8Y, J8C and RJ8C. #5846 is equivalent to #CJ14. #5861 is equivalent to #J19LM, RJ19LM, J17LM and RJ17LM.