your dum
I"ve been trying to find an answer to this question myself and belive the Autolite 3924 corresponds to the Champion RC12YC.24-7423 - Champion RC12YC Spark PlugRC12YC Champion Replaces Autolite 3924, NGK BCPR6ES..
Champion RC12YC, NGK BKR5E-11
champion RC12YC of ngk BKR5E-11
I have autolite sparks plugs ARF32M and need to know the cross reference to NGK
A Champion RC12YC plug crosses over to several NGK plugs including a BCPR5EY, BKR6E-11, BCPR4EY, 09-06-05, BKR5E-11, ZFR5F, 09-06-04, FR5, and BK5RE.
ngk Bm6a its the same plug
This plug is the Champion RCJ7Y.
Your but
what is gap setting for NGK BPMR7A spark plug
cross reference ngk BP4HS
The equivalent NGK plug would be B2LM
rn9y