Adjusted to the factory settings sounded better but still knew it was too lean dissassembled whole carb only thing I could see was the lsn the wee orings where very dry so I put a lil grease on them rebuilt them up did all my factory settings got it on my new starter box heated up with hot air gun started straight away and fun for a whole tank so the orings where to blame happy now can't wait to test this engine cheers guys