Posted: 27/09/2015 at 12:38
If it's been like that from new you should have raised it with (a) the place you bought it or (b) with Mountfield, at the time. The Mountfield I had, had a sticker on it with contact details and it also said on the box not to return to the shop. Mine was running far too slow and an e-mail to Mountfield resulted in instructions being sent through on how to make it run faster. That did help but never really fixed the problem, as the cut quality was bad too.. I ended up getting rid of it and buying a Honda Izy instead.
However, we are where we are, so all you can really do it put it in to get it serviced.