Good Verticuteermachines ... had its predecessor in Blue das10 years and about 3 times a year was at 500 square meters of lawn in use. Eventually went on strike the previous model of the motor (no smoke ... fire !!!) but what it was that had accumulated dry grass in the device. Will the machine screw Therefore every 5 years time and cleaned with compressed air (is a trained electrical engineer and should not be a problem).