Helicopter turbine engine, comprising: - at least one compressor , at least one turbine , and a drive shaft of said compressor and of the turbine, - an electric starter motor comprising electronic components and configured to rotate said drive shaft , - a system for cooling electronic components of the electric motor, comprising a heat sink for cooling electronic components and a ventilation wheel driven by the electric motor, characterised in that : - the ventilation wheel is a reversible ventilation wheel, adapted to generate an air flow in a first direction termed direct direction when it is rotated in a first direction of rotation, and an air flow in a direction opposite the direct direction, termed opposite direction, when it is rotated in a second direction of rotation, - the turbine engine comprises an overrunning clutch , said overrunning clutch being configured to transmit the torque generated by the electric motor to the drive shaft when the electric motor rotates according to a first direction of rotation and at a speed at least equal to the speed of the drive shaft when the turbine engine operates and drives the drive shaft, - the electric motor is configured to, in a first operating mode and in the first direction of rotation, drive, on the one hand, the drive shaft via the overrunning clutch and, on the other hand, the ventilation wheel so as to generate an air flow through the heat sink in the direct direction, in a second operating mode and in the reverse direction of rotation, drive only the ventilation wheel so as to generate an air flow through the heat sink in the opposite direction. - at least one compressor , at least one turbine , and a drive shaft of said compressor and of the turbine, - an electric starter motor comprising electronic components and configured to rotate said drive shaft , - a system for cooling electronic components of the electric motor, comprising a heat sink for cooling electronic components and a ventilation wheel driven by the electric motor, - the ventilation wheel is a reversible ventilation wheel, adapted to generate an air flow in a first direction termed direct direction when it is rotated in a first direction of rotation, and an air flow in a direction opposite the direct direction, termed opposite direction, when it is rotated in a second direction of rotation, - the turbine engine comprises an overrunning clutch , said overrunning clutch being configured to transmit the torque generated by the electric motor to the drive shaft when the electric motor rotates according to a first direction of rotation and at a speed at least equal to the speed of the drive shaft when the turbine engine operates and drives the drive shaft, - the electric motor is configured to, in a first operating mode and in the first direction of rotation, drive, on the one hand, the drive shaft via the overrunning clutch and, on the other hand, the ventilation wheel so as to generate an air flow through the heat sink in the direct direction, in a second operating mode and in the reverse direction of rotation, drive only the ventilation wheel so as to generate an air flow through the heat sink in the opposite direction. <EOS>