Hi thanks for all the replies, Usually i do take these as learning experiences but this has gone on for too long. Once i had a Tanaka and i cleaned the carby and didnt realise that id tightened the mixture screw up.
Ill clean the lines and the tank really really well tomorrow and keep you updated.
Bruce, with the different needles how do i tell what i need? i had a look, do i need to match up the part number on the primer cap with the needles part number?
