Hi
The mower is now going!
I brought from ebay here in the UK a spares Victa with a plastic carb
I stripped it cleaned it put it on and it started and ran almost first time.
I have got used to stripping them now! the only differences I could see is that I had definitely stretched the long spring that goes on top of the diaphragm , would this be critical?
I am going to get another spring and diaphragm and rebuild the original carb and fit it to the ebay mower and investigate further, I will post the result
Thank you all for your help it is much appreciated
Dennis