Thread revival here, but I'm having the same problem with my Victa Vantage with 450 B&S engine...
I changed the oil and put a new air filter in today and its running better than it was, but the throttle is still stuffed and I don't really understand why. Both springs are connected to where they are supposed to be according to the workshop manual diagrams posted earlier but still no control.
Once I've started her up, only way to get it to stop is to pull the plug or run it out of petrol so it is annoying... anyone have any ideas?
