Champion 3071
Champion rc12yc, Briggs 491055 or Champion Premium plug (platinum) #3071
GAP .030"
694385 is a platinum plug also sold as Briggs 5066 and 5066H. Non-platinum Champion equivalent is RC12YC.
A champion RC12YC spark plug is 14mm thread diameter. The torque for this size is 18-22 foot-pounds (25 to 30Neuton·meters)
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
Rc12yc
Rc12yc
Champion RC12YC, NGK BKR5E-11
Should take a Champion: RC12YC
RC12YC in Champion
I was wondering the same thing this afternoon