Re: Correct spark plug for 1924 Model D Elto Ruddertwin

Home Forum Ask A Member Correct spark plug for 1924 Model D Elto Ruddertwin Re: Correct spark plug for 1924 Model D Elto Ruddertwin


roalco


Replies: 11
Topics: 2
#73430

NGK does makes equivalent sized plugs, their A-6, A-7 and A-8 (or AB-6, AB-7, AB-8, if you want a conventional 13/16" hex, rather than 1") are 18mm, 1/2" reach, with 6 the hottest and 8 the coolest in their heat range.