The alm manufacturing rcj7y spark plug is suitable for many einhell petrol brush cutters chainsaws garden vacuums grass trimmers hedge trimmers and other small engines including gh bc 25 as 3401953 gh bc 301gh bc 43 as 3401973 and gh pt 2538 as 3401850 note alm rcj7y is printed with alm 7 on the spark plug compares to autolite 2974 2984 xst2974bosch wsr6fbrisk pr15ychampion rcj6y rcj7y stk 852denso w20mp u w22mpr u stk 6023 einhell 340186501134general motors 5613726 iskra fsc75cpr motorcraft a22