 The drive motor was a petrol KdF (Volkswagen) 14 ps (hp) engine, adapted for stationary industrial use by the fitting of magneto ignition and a centrifugal governor to the throttle; besides these modifications, the engine was otherwise identical to those found in Volkswagen Beetles, an air-cooled flat-four boxer.The engine was housed in a metal box fixed to the chassis frame.A three-piston eccentric-cam hydraulic pump was coupled to the engine flywheel.