Hi Miloboy welcome here from wherever Mount Louisa is. What I would do is remove the air filter, start the motor, rev it up by moving the governor arm and jam your thumb down on the top of the carby inlet, hold it there till the motor nearly stops then release your thumb, allow the motor to come up to revs again and then repeat the process. Do this maybe half a dozen times and see if that solves the problem, it often does,but sucking a bit of rubbish/gunk inside the carby. Worth a try and nothing to loose.
