All started out Ok at the lhs. The guy was quite enthusiastic. He got it running & started adjusting the carb, but when he gave it a bit of throttle, it cut out still. Carried on fiddling about, but eventually what was happening, was, he'd rev it up & let go of the throttle & it would still rev momentarily & then come down after a delay. He reckons it's sucking in air somewhere. His solution was to try & sell me another engine, but this one I have, has only just been run in. He got fed up in the end, said "adios" & went for a coffee. Quite hilarious really. Anyway, I'm back to square one. I've got another carb & am going to try that on it. Failing that, I'm stumped