I have had my Karcher 2.100 for about 3 years and its had light use ! I noticed it was leak oil and after a hour and half use it has stopped pushing High pressure water out the nozzle . The motor is making an aural sound as if it's working. I haven't made any adjustments to the spray output nozzle and it has a greyish oil leaking from the very bottom. Can you pls help Kindest Rgs David O