A lawnmower 10 is disclosed comprising a chassis 20 including a cutting chamber 21, a cutting blade rotatably mounted within the cutting chamber, and an electric motor 30 mounted to the chassis above the cutting chamber which in use drives the cutting blade. Apertures 31 are provided between the chassis 20 and the motor 30 to allow air to be drawn into the cutting chamber 21. The lawnmower further comprises an electronics housing 50 mounted above the motor, the base of the housing 52 forming a heat sink for the electronic components in the housing which is cooled by air drawn into the cutting chamber through the apertures 31. The top surface of the electronics housing 50 is uncovered in use and open to air. The housing 50 is mounted to the motor casing by means of a plurality of mounting posts 54 which space the base of the housing from the motor casing. An aperture in the housing base 51 is provided for one or more wires to pass out of the housing, and a resilient seal is provided in the aperture between the wire and the housing base to maintain the protection of the interior space of the housing.
