Champion Spark Plug, Standard, For Use With Honda GAS ENGINES -- OHC horizontal and vertical, 3. 5/GX110, 5. 0/GX140, GXV140 Robin GAS ENGINES -- 9. 0/EH30, EH30V, 11. 0/EH34, EH34V, 11. 5/EH36, 13. 0/EH43V, 13. 5/EH41, 18. 0/EH63, EH63V, 20. 5/EH64, 22. 0/EH65, EH65V, 25. 0/EH72, EH72V, Application Champion/n9yc