Spark plug thread pitch
Posted: Mon Jun 17, 2024 8:02 amI have an AeroVee 2180 V2.0 engine. Concerning spark plug holes, what is the common thread pitch? 1.25 or 1.5
A search on Autolite 4163 shows 12x1.25
https://www.autolitesparkplugs.com/auto ... spark-plug