The mountfield s481 pd lawn mower has all the same great features as the s481 hp with the addition of power driven rear wheels which removes the effort of pushing the mower its very easy to use just pull the clutch lever and away you go let the lever go and the wheels stop it couldnt be easierpower driven mowers have increased in popularity and in many cases they are preferred to their hand propelled counterparts powered by an easy to start mountfield 160cc ohv four stroke engine wit