Hi Bigted and AVB,, i think i have sorted out the problem. Got up early this morning and went through the full running of the mower. Bigted, you were on the right track. i started the mower without the air filter on and carefully watched the choke butterfly. Even after the mower had warmed up, running for approx 5 mins, i noticed that the choke was not fully opening, was able to open with my finger on the choke control arm which helped the mower run a bit smoother. I have come to the conclusion that the wax cylinder with the piston is no longer any good. As the piston is not coming fully out, the choke is therefore staying on. Am going to change it and see how it goes,, will let you know how i go.
Paul.
