Drilling Out A Brass Mixture Screw Block-Off Apr 5, 2012 9:11:31 GMT -5 ʇwiƨtɘdburnout likes this Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by 90GTVert on Apr 5, 2012 9:11:31 GMT -5 This vid shows a fellow drilling out the brass plug that blocks access to the mixture screw on some stock carburetors for emissions concerns.www.youtube.com/watch?v=t5Rkv2avRRU