Replaces part # 172522. Johnson, Evinrude Outboard 3-40Hp Tune Up Kit. Sierra part # 18-5006. 18 HP 1957-1961. 40 HP 1960-1961. 35 HP 1958-1959. 30 HP 1956. 25 HP 1955.
After buying an American kit for my 69 6 horse Johnson it wouldn't adjust properly so you could adjust the gap. I then bought the Sierra kit and it fit perfectly and adjusted as it should. runs great now.