Having a problem with my Evolution 100! at about half wide open it will miss and then die. Have tried several plugs, and have reset the needles. Have spen the better part of two days on this engine. burnt about one and half gallons through it at this time useing 15% now but was using 10%. Didn't make any differance. Ordered new plugs from Horizon today. it is the nt/nx model.
john