Hi, There must be something drasticly wrong with this carby. I had this line trimmer serviced by someone who i thought was a reputable repair centre. I pulled the side off the carby and found no filter screen. Instead there was a diaphram with a clear plastic centre in there (no gauze filter). I have repaired many small engines in my time something seems quite wrong. I have never had anything to do with carbys of this size. Perhaps i have met a dodgy repair man. Any help??