Thanks for the replies, I thought the furthest mark was the max mark so I set it to this (on full throttle) and it now runs like a dog and keeps going on one cylinder.Andy I just wanted to confirm the first marker on the pulley is definetley the correct mark?I dont want to set it too lean and seize it!Thanks again for the quick replies fellas.
P.S.where abouts did you live invigator? I live in Sawston just south of Cambridge.