My SP 470 Mountfield mower running problem?

I had the same problem, there is a filter on the fuel outlet from the tank, if you take the fuel hose off it is a white end which you pull out and clean it, I also found some bits in the carb itself which you can drain there is a bolt on the side not the one at the bottom which you can drain the petrol from.

Gorskhe
October 2010

sounds like you have a fuel blockage

GHOST
October 2010