FuninAK
AlaskaJeff
Anyone running hotter plugs in a slightly modded MM600/700 (nothing internal) engine? I guess BR9ES is the norm for the MM's. Would the BR8ES make much of a difference? I know richer is always better to keep from burning holes in the tops of the pistons but....every little bit helps, right?
bucky
New member
I would just be safe and stick with the BR9ES.